Veröffentlichungen





2020

  • S. Schellenberger, K. Shi, J. P. Wiedemann, F. Lurz, R. Weigel, and A. Koelpin, "An Ensemble LSTM Architecture for Clinical Sepsis Detection" in International Conference in Computing in Cardiology 2019, Singapur, 2020 (to be published). [Bibtex]
    @inproceedings{schellenberger2020,
    author = {Schellenberger, Sven and Shi, Kilin and Wiedemann, Jan Philipp and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    booktitle = {International Conference in Computing in Cardiology 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/229466673},
    year = {2020},
    month = {09},
    day = {08},
    eventdate = {2019-09-08/2019-09-11},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {An Ensemble LSTM Architecture for Clinical Sepsis Detection},
    type = {Journal Article},
    venue = {Singapur},
    }
  • M. Gardill, J. Schwendner, and J. Fuchs, "An Approach to Over-the-air Synchronization of Commercial Chirp-Sequence Automotive Radar Sensors" in 2020 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNeT), San Antonio, Texas, USA, 2020, pp. 1-4. [Bibtex]
    @inproceedings{gardill2020,
    abstract = {An approach to wireless synchronization between two commercial 77GHz automotive FMCW radar sensors is shown. Our focus is the alignment of a passive listening sensor to a second active transmitting sensor in frequency, time, and waveform modulation parameters, just by observing the signals transmitted from the active sensor. We show that using a combination of inter- and intra-chirpsequence synchronization, the active sensor’s signal can be successfully de-ramped for fast-chirp-sequence waveforms with 275MHz of bandwidth. In addition, we discuss timing requirements and challenges, and characterize the remaining synchronization errors by an analysis of the IF signal data matrix of the de-ramped waveform.},
    author = {Gardill, Markus and Schwendner, Johannes and Fuchs, Jonas},
    language = {English},
    booktitle = {2020 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNeT)},
    cris = {https://cris.fau.de/converis/publicweb/publication/229092398},
    year = {2020},
    month = {05},
    day = {26},
    eventdate = {2020-01-26/2020-01-29},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {unknown},
    title = {An Approach to Over-the-air Synchronization of Commercial Chirp-Sequence Automotive Radar Sensors},
    type = {Konferenzschrift},
    venue = {San Antonio, Texas, USA},
    }
  • S. Breun, S. Kehl-Waas, and V. Issakov, "Extended Equivalent Circuit Model for Enhanced Substrate Modeling of Three-Port Inductors" in RWW 2020, 2020 (to be published). [Bibtex]
    @inproceedings{breun2020,
    abstract = {This paper presents an extension to the equivalent circuit of a three-port inductor model which enhances the quality factor accuracy by precisely considering the parasitic substrate losses caused by eddy current effects. The proposed equivalent circuit allows to correctly model the broadband frequency dependency of the substrate admittances. Furthermore it is applied to an almost fully analytical extraction procedure and can therefore be used for the generation of scalable inductor models.
    }, author = {Breun, Sascha and Kehl-Waas, Sebastian and Issakov, Vadim}, language = {English}, booktitle = {RWW 2020}, cris = {https://cris.fau.de/converis/publicweb/publication/227024935}, year = {2020}, month = {01}, day = {26}, eventdate = {2020-01-26/2020-01-29}, faupublication = {yes}, note = {unpublished}, peerreviewed = {automatic}, title = {Extended Equivalent Circuit Model for Enhanced Substrate Modeling of Three-Port Inductors}, }
  • S. Breun, M. Völkel, A. Schrotz, M. Dietz, V. Issakov, and R. Weigel, "A Low-Power 14% FTR Push-Push D-Band VCO in 130 nm SiGe BiCMOS Technology with -178 dBc/Hz FOMT" in RWW 2020, 2020 (to be published). [Bibtex]
    @inproceedings{breun2020a,
    abstract = {This paper presents a low-power wideband push-push voltage controlled oscillator (VCO), achieving a frequency tuning-range (FTR) of 19 GHz (14 %) at a center frequency of 136 GHz. The VCO yields a minimum phase noise of −86.5 dBc/Hz at 1 MHz offset at a power consumption of around 27 mW from a 1.8 V supply, which yields a FOMT of −178 dBc/Hz. The chip is fabricated using a 130 nm SiGe BiCMOS technology with ft/fmax of 250 GHz/370 GHz, respectively, and is integrated with a by-32 divider chain attached to the fundamental output of the VCO, offering a 2.1 GHz output for an external phaselocked loop (PLL).
    }, author = {Breun, Sascha and Völkel, Matthias and Schrotz, Albert-Marcel and Dietz, Marco and Issakov, Vadim and Weigel, Robert}, language = {English}, booktitle = {RWW 2020}, cris = {https://cris.fau.de/converis/publicweb/publication/227024522}, year = {2020}, month = {01}, day = {26}, eventdate = {2020-01-26/2020-01-29}, faupublication = {yes}, note = {unpublished}, peerreviewed = {automatic}, title = {A Low-Power 14% FTR Push-Push D-Band VCO in 130 nm SiGe BiCMOS Technology with -178 dBc/Hz FOMT}, }
  • M. Frank, F. Lurz, M. Kempf, J. Röber, R. Weigel, and A. Koelpin, "Miniaturized Ultra-Wideband Antenna Design for Human Implants" in IEEE Radio & Wireless Week 2020, San Antonio, Texas, USA, 2020 (to be published). [Bibtex]
    @inproceedings{frank2020,
    author = {Frank, Martin and Lurz, Fabian and Kempf, Markus and Röber, Jürgen and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE Radio & Wireless Week 2020},
    cris = {https://cris.fau.de/converis/publicweb/publication/226710795},
    year = {2020},
    month = {01},
    day = {26},
    eventdate = {2020-01-26/2020-01-29},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Miniaturized Ultra-Wideband Antenna Design for Human Implants},
    type = {Konferenzschrift},
    venue = {San Antonio, Texas, USA},
    }
  • S. Heining, F. Michler, B. Scheiner, E. Hassan, A. Koelpin, R. Weigel, and F. Lurz, "An Ultra Broadband Multi-Tone Six-Port Radar for Distance Measurements in K-Band Waveguides" in IEEE Radio and Wireless Symposium, San Antonio, TX, USA, 2020 (to be published). [Bibtex]
    @inproceedings{heining2020,
    author = {Heining, Simon and Michler, Fabian and Scheiner, Benedict and Hassan, Emadeldeen and Koelpin, Alexander and Weigel, Robert and Lurz, Fabian},
    booktitle = {IEEE Radio and Wireless Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/226745266},
    year = {2020},
    month = {01},
    day = {26},
    eventdate = {2020-01-26/2020-01-29},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {An Ultra Broadband Multi-Tone Six-Port Radar for Distance Measurements in K-Band Waveguides},
    venue = {San Antonio, TX, USA},
    }
  • F. Michler, K. Shi, S. Schellenberger, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "On the Impact of System Nonlinearities in Continuous-Wave Radar Systems for Vital Parameter Sensing" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), San Antonio, TX, USA, 2020 (to be published). [Bibtex]
    @inproceedings{michler2020,
    author = {Michler, Fabian and Shi, Kilin and Schellenberger, Sven and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/227259366},
    year = {2020},
    month = {01},
    day = {26},
    eventdate = {2020-01-26/2020-01-29},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {On the Impact of System Nonlinearities in Continuous-Wave Radar Systems for Vital Parameter Sensing},
    venue = {San Antonio, TX, USA},
    }
  • J. Potschka, M. Dietz, K. Kolb, T. Maiwald, D. Ferling, A. Hagelauer, and R. Weigel, "A Tuneable Fully Single-Ended 39 GHz to 28 GHz Gilbert Micromixer for 5G Using Analog Predistortion in a 130 nm BiCMOS Technology (to be published)" in IEEE Radio & Wireless Week (RWW), San Antonio, Texas, USA, 2020. [Bibtex]
    @inproceedings{potschka2020,
    author = {Potschka, Julian and Dietz, Marco and Kolb, Katharina and Maiwald, Tim and Ferling, Dieter and Hagelauer, Amelie and Weigel, Robert},
    language = {English},
    booktitle = {IEEE Radio & Wireless Week (RWW)},
    cris = {https://cris.fau.de/converis/publicweb/publication/227842814},
    year = {2020},
    month = {01},
    day = {26},
    eventdate = {2020-01-26/2020-01-29},
    faupublication = {yes},
    keywords = {Gilbert-Micromixer,Mixer,Reactive-Current-Combining,Tuneable-Mixer,5G},
    peerreviewed = {Yes},
    title = {A Tuneable Fully Single-Ended 39 GHz to 28 GHz Gilbert Micromixer for 5G Using Analog Predistortion in a 130 nm BiCMOS Technology (to be published)},
    type = {Konferenzschrift},
    venue = {San Antonio, Texas, USA},
    }
  • T. Reißland, M. Sporer, B. Scheiner, F. Pflaum, A. Hagelauer, R. Weigel, and F. Lurz, "Track-before-Detect Short Range Radar System for Industrial Applications" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), San Antonio (TX), USA, 2020 (to be published). [Bibtex]
    @inproceedings{reissland2020,
    abstract = {The paper presents a multiplexed short range frequency modulated continuous wave (FMCW) radar sytem and an algorithmic approach for the detection of targets. The algorithm uses a heuristic particle filter to track potential targets before they are actually detected. The detection algorithm is compared to a well known constant false alarm rate (CFAR) detector. The whole setup is tested on real-life data in an industrial scenario.
    }, author = {Reißland, Torsten and Sporer, Michael and Scheiner, Benedict and Pflaum, Felix and Hagelauer, Amelie and Weigel, Robert and Lurz, Fabian}, language = {English}, booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)}, cris = {https://cris.fau.de/converis/publicweb/publication/226742496}, year = {2020}, month = {01}, day = {26}, eventdate = {2020-01-26/2020-01-29}, faupublication = {yes}, keywords = {Radar; Detection,Track before Detect,Industrial}, note = {unpublished}, peerreviewed = {automatic}, title = {Track-before-Detect Short Range Radar System for Industrial Applications}, venue = {San Antonio (TX), USA}, }
  • S. Erhardt, J. Koller, F. Lurz, A. Koelpin, and R. Weigel, "An Automatic Detection and Data Downlink System for Miniature Bat Loggers" in Radio&Wireless Week 2020, 2020 (to be published). [Bibtex]
    @inproceedings{erhardt2020,
    author = {Erhardt, Stefan and Koller, Josef and Lurz, Fabian and Koelpin, Alexander and Weigel, Robert},
    booktitle = {Radio&Wireless Week 2020},
    cris = {https://cris.fau.de/converis/publicweb/publication/227559614},
    year = {2020},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {An Automatic Detection and Data Downlink System for Miniature Bat Loggers},
    }
  • B. Scheiner, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Nothing Beats SNR: Single-Digit Micrometer Ranging Using a Low-Power CW Radar Featuring a Low-Weight 3D-Printed Horn Antenna", IEEE Microwave Magazine, 2020 (to be published). [DOI] [Bibtex]
    @article{scheiner2020,
    author = {Scheiner, Benedict and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/228197395},
    year = {2020},
    doi = {10.1109/MMM.2019.2945150},
    faupublication = {yes},
    journaltitle = {IEEE Microwave Magazine},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Nothing Beats SNR: Single-Digit Micrometer Ranging Using a Low-Power CW Radar Featuring a Low-Weight 3D-Printed Horn Antenna},
    }

2019

  • B. Scheiner, F. Lurz, F. Michler, R. Weigel, and A. Koelpin, "Frequency Readjustment of Excitation Signals for Resonant Surface Acoustic Wave Sensors in the 2.45 GHz ISM Band" in Asia-Pacific Microwave Conference (APMC19), Singapore, 2019 (to be published). [Bibtex]
    @inproceedings{scheiner2019d,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Asia-Pacific Microwave Conference (APMC19)},
    cris = {https://cris.fau.de/converis/publicweb/publication/221503913},
    year = {2019},
    month = {12},
    day = {10},
    eventdate = {2019-12-10/2019-09-13},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {Yes},
    title = {Frequency Readjustment of Excitation Signals for Resonant Surface Acoustic Wave Sensors in the 2.45 GHz ISM Band},
    type = {Konferenzschrift},
    venue = {Singapore},
    }
  • M. Völkel, S. Pechmann, E. M. Hussein, D. Kissinger, R. Weigel, and A. Hagelauer, "A Cascadable Integrated Bistatic Six-port Transceiver at 60 GHz in a 130-nm BiCMOS Technology for SIMO-Radar Applications" in APMC, , Singapore, 2019 (to be published). [Bibtex]
    @inproceedings{voelkel2019e,
    abstract = {In this paper a 60 GHz cascadable bistatic integrated
    interferometric transceiver for SIMO radar applications
    is presented. The integrated transceiver has been designed in a
    0.13μm SiGe BiCMOS technology (SG13G2) from the institute
    innovations for high performance microelectronics (IHP). The
    System includes a 15 GHz buffer stage, a low noise amplifier, a
    passive interferometric six-port structure, several detectors and
    amplifiers as well as a digital interface. The chip has a size
    of 2.75mm x 1.15mm and a maximum power consumption of
    525mW from a 3.3V power supply. The 15 GHz frequency
    input is multiplied to reach a 60 GHz signal at a minimum
    input power of -40 dBm. The chip delivers a maximum output
    power of 10.2 dBm. A digital interface adjusts the output power
    between -22 and 10,2 dBm at an output frequency of 60 GHz. The
    reference input power of the six-port and the RF input power
    could be adjusted in a range of 13.2 dB. The maximum P1dB is at
    -24.1 dBm. The measured power detector sensitivity is 7090 V/W.
    The standard deviation of the phase measurement is 0.025 rad.
    }, author = {Völkel, Matthias and Pechmann, Stefan and Hussein, Eissa Mohamed and Kissinger, Dietmar and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {APMC}, cris = {https://cris.fau.de/converis/publicweb/publication/225394716}, year = {2019}, month = {12}, day = {12}, eventdate = {2019-12-10/2019-12-13}, faupublication = {yes}, keywords = {bistatic; industrial radar; integrated transceiver; interferometric radar; millimeter wave circuits; SIMO Radar; MMIC; SiGe BiCMOS; six-port; system-on-chip (SoC)}, note = {unpublished}, peerreviewed = {unknown}, title = {A Cascadable Integrated Bistatic Six-port Transceiver at 60 GHz in a 130-nm BiCMOS Technology for SIMO-Radar Applications}, type = {Konferenzschrift}, venue = {, Singapore}, }
  • A. Schrotz, T. Maiwald, K. Kolb, S. Breun, M. Dietz, A. Hagelauer, and R. Weigel, "Design Methodology for Automatically Designed, Integrated Marchand Baluns with Low Insertion Loss at Lowest Phase Imbalance" in APMC (Asia-Pacific Microwave Conference), Singapur, Singapore, 2019 (to be published). [Bibtex]
    @inproceedings{schrotz2019,
    abstract = {In this paper, a design methodology for automated Marchand balun design is shown. The goal of this methodology is a balun providing the lowest insertion loss at the smallest phase imbalance. The design process is realized by using the EM simulator Sonnet, Matlab and the Matlab-Sonnet interface. The implemented algorithm is using a simulation-based characterization of the semiconductor process and a mathematical model of the balun. For this characterization an even and odd mode analysis is carried out. Hence, the electrical and dielectric properties, such as the characteristic impedance and the effective permittivity, are determined. This enables a precise "first guess simulation" of the balun, minimizing the required number of optimization iterations. As an example, a D-band Marchand balun is presented here, that was designed with this methodology. The measurement results show a phase imbalance less than 7° over the entire D-band and an insertion loss smaller than 1.75 dB. To the best of the author's knowledge, there was no software tool that enables automated development for Marchand baluns yet, although it is widely used.
    }, author = {Schrotz, Albert-Marcel and Maiwald, Tim and Kolb, Katharina and Breun, Sascha and Dietz, Marco and Hagelauer, Amelie and Weigel, Robert}, language = {English}, booktitle = {APMC (Asia-Pacific Microwave Conference)}, cris = {https://cris.fau.de/converis/publicweb/publication/224804429}, year = {2019}, month = {12}, day = {10}, eventdate = {2019-12-10}, faupublication = {yes}, keywords = {Marchand Balun; Automatically balun Design}, note = {unpublished}, peerreviewed = {automatic}, title = {Design Methodology for Automatically Designed, Integrated Marchand Baluns with Low Insertion Loss at Lowest Phase Imbalance}, venue = {Singapur, Singapore}, }
  • J. Potschka, M. Dietz, K. Kolb, T. Maiwald, S. Breun, T. Ackermann, D. Ferling, A. Hagelauer, and R. Weigel, "A Highly Linear and Efficient 28 GHz Stacked Power Amplifier for 5G using Analog Predistortion in a 130 nm BiCMOS Process (to be published)" in IEEE Asia-Pacific Microwave Conference (APMC), Singapore, 2019. [Bibtex]
    @inproceedings{potschka2019a,
    author = {Potschka, Julian and Dietz, Marco and Kolb, Katharina and Maiwald, Tim and Breun, Sascha and Ackermann, Thomas and Ferling, Dieter and Hagelauer, Amelie and Weigel, Robert},
    language = {English},
    booktitle = {IEEE Asia-Pacific Microwave Conference (APMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/225496208},
    year = {2019},
    month = {12},
    day = {10},
    eventdate = {2019-12-10/2019-12-13},
    faupublication = {yes},
    keywords = {Analog Predistortion; Power Amplifier; 5G},
    peerreviewed = {Yes},
    title = {A Highly Linear and Efficient 28 GHz Stacked Power Amplifier for 5G using Analog Predistortion in a 130 nm BiCMOS Process (to be published)},
    type = {Konferenzschrift},
    venue = {Singapore},
    }
  • R. Ciocoveanu, R. Weigel, A. Hagelauer, and V. Issakov, "A 20.7% PAE 3-Stage 60 GHz Power Amplifier for Radar Applications in 28 nm Bulk CMOS" in European Microwave Week, Paris, France, 2019. [Bibtex]
    @inproceedings{ciocoveanu2019a,
    abstract = {This paper presents a highly efficient 3-stage differential Class-B power amplifier (PA) for short range radar applications, realized in a 28nm bulk CMOS technology. Measurement results show a saturated output power (Psat) of 11.9dBm with a 20.7% power-added efficiency (PAE) at 60 GHz. Moreover, the measurements show that for a frequency range from 57 GHz to 64 GHz, the Psat varies from 10.5dBm to 11.2dBm and the circuit draws 26mA from a 0.9V power supply. Furthermore, the fabricated chip has an area of 0.61mm x 0.31mm including the pads.
    }, author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim}, language = {English}, booktitle = {European Microwave Week}, cris = {https://cris.fau.de/converis/publicweb/publication/220911836}, year = {2019}, month = {12}, day = {29}, eventdate = {2019-09-29/2019-10-04}, faupublication = {yes}, keywords = {Differential PA,60 GHz,28nm CMOS,High Efficiency.}, peerreviewed = {unknown}, title = {A 20.7% PAE 3-Stage 60 GHz Power Amplifier for Radar Applications in 28 nm Bulk CMOS}, type = {Konferenzschrift}, venue = {Paris, France}, }
  • N. Duda, R. Weigel, and A. Koelpin, "Sensor Enhanced Dual Frequency RSSI Distance Estimation for Low Weight Wireless Sensor Nodes" in 2019 IEEE Asia-Pacific Microwave Conference (APMC) (APMC 2019), Singapur, Singapur, Singapore, 2019 (to be published). [Bibtex]
    @inproceedings{duda2019c,
    author = {Duda, Niklas and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2019 IEEE Asia-Pacific Microwave Conference (APMC) (APMC 2019)},
    cris = {https://cris.fau.de/converis/publicweb/publication/226956764},
    year = {2019},
    month = {12},
    day = {13},
    eventdate = {2019-12-10/2019-12-13},
    eventtitle = {2019 IEEE Asia-Pacific Microwave Conference (APMC 2019)},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {Yes},
    title = {Sensor Enhanced Dual Frequency RSSI Distance Estimation for Low Weight Wireless Sensor Nodes},
    type = {Konferenzschrift},
    venue = {Singapur, Singapur, Singapore},
    }
  • J. Jakob, R. Sammer, F. X. Röhrl, S. Zorn, and W. Bogner, "WR12 to planar transmission line transition on organic substrate" in Proceedings of the European Microwave Conference 2019, Paris, France, 2019, p. 4. [Bibtex]
    @inproceedings{jakob2019,
    abstract = {Transitions for planar transmission lines on printed circuit boards (PCB) to rectangular waveguide are challenging to design and manufacture. This paper introduces two transitions, the first one is a broadband transition from WR12 (60–90 GHz) waveguide to a stripline (SL) and the second is a narrowband transition to a grounded coplanar waveguide (GCPW). The focus at the first transition is based on the fact that signals can be transmitted in the complete EBand. In the process, many manufacturing possibilities were exploited. For the second transition, the focus was on manufacturability in order to achieve the most cost effective transition possible. Design, simulated and measured results will be presented.
    }, author = {Jakob, Johannes and Sammer, Roman and Röhrl, Franz Xaver and Zorn, Stefan and Bogner, Werner}, language = {English}, booktitle = {Proceedings of the European Microwave Conference 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/216230917}, year = {2019}, month = {10}, day = {04}, eventdate = {2019-09-29/2019-10-04}, eventtitle = {European Microwave Conference}, faupublication = {yes}, keywords = {waveguide,PCB,transition,planar transmission line,grounded coplanar,stripline,WR12,GCPW}, pages = {4}, peerreviewed = {Yes}, title = {WR12 to planar transmission line transition on organic substrate}, type = {Konferenzschrift}, venue = {Paris, France}, }
  • N. Duda, S. Ripperger, M. Tschapka, F. Mayer, R. Weigel, and A. Koelpin, "Wireless Sensor Platform for Detection of Vital Parameters of Bats" in International Engineering in Medicine and Biology Conference (EMBC), Berlin, Germany, Germany, 2019. [DOI] [Bibtex]
    @inproceedings{duda2019a,
    author = {Duda, Niklas and Ripperger, Simon and Tschapka, Marco and Mayer, Frieder and Weigel, Robert and Koelpin, Alexander},
    booktitle = {International Engineering in Medicine and Biology Conference (EMBC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/222789204},
    year = {2019},
    month = {10},
    day = {07},
    doi = {10.1109/EMBC.2019.8856769},
    eventdate = {2019-07-23/2019-07-27},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Wireless Sensor Platform for Detection of Vital Parameters of Bats},
    type = {Journal Article},
    venue = {Berlin, Germany, Germany},
    }
  • T. Reißland, M. Kuba, J. Robert, A. Koelpin, R. Weigel, and F. Lurz, "Synchronization Approaches and Improvements for a Low-Complexity Power Line Communication Algorithm" in 2019 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids, Peking, China, 2019 (to be published). [Bibtex]
    @inproceedings{reissland2019b,
    abstract = {This paper presents several improvements of the energy-pattern based sequence detection (EPSD) algorithm for FSK-based single-phase power line communication (PLC) systems, in terms of complexity, reliability and synchronization. A time synchronization is presented which fulfills the well known task of synchronizing transmitter and receiver, but also helps to avoid transmissions in periods of rough noise conditions. The synchronization method is based on a maximum-likelihood approach that makes use of the phase of the mains voltage. Further improvements concern the codes used for the transmitted sequences as well as the combination of the information within both FSK carrier-frequencies in terms of equal gain and maximum ratio combining. Additionally an approach for a lowcomplexity frame synchronization is presented.
    }, author = {Reißland, Torsten and Kuba, Matthias and Robert, Jörg and Koelpin, Alexander and Weigel, Robert and Lurz, Fabian}, language = {English}, booktitle = {2019 IEEE International Conference on Communications, Control, and Computing Technologies for Smart Grids}, cris = {https://cris.fau.de/converis/publicweb/publication/200235171}, year = {2019}, month = {10}, day = {21}, eventdate = {2019-10-21/2019-10-24}, faupublication = {yes}, note = {unpublished}, peerreviewed = {unknown}, title = {Synchronization Approaches and Improvements for a Low-Complexity Power Line Communication Algorithm}, type = {Konferenzschrift}, venue = {Peking, China}, }
  • S. Ripperger, G. Carter, N. Duda, A. Koelpin, B. Cassens, R. Kapitza, D. Josic, J. Berrío-Martínez, R. Page, and F. Mayer, "Vampire Bats that Cooperate in the Lab Maintain Their Social Networks in the Wild", Current Biology, 2019. [DOI] [Bibtex]
    @article{ripperger2019b,
    author = {Ripperger, Simon and Carter, Gerald and Duda, Niklas and Koelpin, Alexander and Cassens, Björn and Kapitza, Ruediger and Josic, Darija and Berrío-Martínez, Jineth and Page, Rachel and Mayer, Frieder},
    cris = {https://cris.fau.de/converis/publicweb/publication/228567728},
    year = {2019},
    month = {10},
    day = {31},
    doi = {10.1016/J.CUB.2019.10.024},
    faupublication = {yes},
    issn = {0960-9822},
    journaltitle = {Current Biology},
    peerreviewed = {Yes},
    shortjournal = {CURR BIOL},
    title = {Vampire Bats that Cooperate in the Lab Maintain Their Social Networks in the Wild},
    type = {Article in Journal},
    }
  • B. Scheiner, F. Lurz, F. Michler, R. Weigel, and A. Koelpin, "In-Situ-Linearization for Instantaneous Frequency Measurement Systems" in European Microwave Week 2019, Paris, France, 2019. [Bibtex]
    @inproceedings{scheiner2019b,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {European Microwave Week 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/212606436},
    year = {2019},
    month = {10},
    day = {02},
    eventdate = {2019-09-30/2019-10-03},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {In-Situ-Linearization for Instantaneous Frequency Measurement Systems},
    type = {Konferenzschrift},
    venue = {Paris, France},
    }
  • M. Frank, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "Low-cost Transmitarray Antenna Designs in V-Band based on Unit-Cells with 1 Bit Phase Resolution", Frequenz, vol. 73, iss. 11-12, pp. 355-366, 2019. [DOI] [Bibtex]
    @article{frank2019e,
    author = {Frank, Martin and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {Frequenz},
    cris = {https://cris.fau.de/converis/publicweb/publication/224866052},
    year = {2019},
    month = {10},
    day = {18},
    doi = {10.1515/FREQ-2019-0140},
    faupublication = {yes},
    issn = {0016-1136},
    journaltitle = {Frequenz},
    number = {11-12},
    pages = {355--366},
    peerreviewed = {Yes},
    shortjournal = {FREQUENZ},
    title = {Low-cost Transmitarray Antenna Designs in V-Band based on Unit-Cells with 1 Bit Phase Resolution},
    volume = {73},
    }
  • S. Schellenberger, K. Shi, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Respiration Extraction from Radar Heart Sound Measurements" in International Engineering in Medicine and Biology Conference, Berlin, Germany, 2019, pp. 6533-6535. [Bibtex]
    @inproceedings{schellenberger2019,
    abstract = {Radar-based respiration measurement is susceptible to upper body movement in addition to the respiratory motion of the chest. This parasitic movement can only be canceled using a dual radar system from the front and back. However, the larger hardware effort could be avoided if a physiological parameter is measured that is influenced by respiration only but not by the movement. This could then be used to indirectly derive breathing. In this paper a method is presented, how the respiration can be deduced despite of upper body movements. To achieve this, a Six-Port interferometer is used to measure the heart sound envelogram of a test person from which subsequently the respiration can be reconstructed.},
    author = {Schellenberger, Sven and Shi, Kilin and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    language = {English},
    booktitle = {International Engineering in Medicine and Biology Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/215825765},
    year = {2019},
    month = {10},
    day = {23},
    eventdate = {2019-07-23/2019-07-27},
    faupublication = {yes},
    pages = {6533--6535},
    peerreviewed = {Yes},
    title = {Respiration Extraction from Radar Heart Sound Measurements},
    type = {Journal Article},
    venue = {Berlin, Germany},
    }
  • N. Schlechtweg, S. Meyer, H. Unterweger, M. Bartunik, D. Ahmed, W. Wicke, V. Jamali Kooshkghazi, C. Alexiou, G. Fischer, R. Weigel, R. Schober, and J. Kirchner, "Magnetic Steering of Superparamagnetic Nanoparticles in Duct Flow for Molecular Communication: A Feasibility Study" in 14th EAI International Conference on Body Area Networks (BODYNETS 2019), Florenz, Italy, 2019 (to be published). [Bibtex]
    @inproceedings{schlechtweg2019,
    abstract = {Molecular communication (MC) denotes information transmission by use of molecules and nanosized particles. For the realization of testbeds, superparamagnetic iron oxide nanoparticles (SPIONs) in duct
    flow have recently been proposed. Here, an experimental setup is provided to direct these particles at a branching of a tube into a specific direction by use of magnetic fields. 

    For that purpose, gold-coated SPIONs suspended in water at constant flow rate are considered at a Y-shaped connector of tubes. The particles are attracted by use of a custom-made electromagnet, while change of particle concentration in either of the branches is measured by a commercial susceptometer. The approach is evaluated for different flow rates and with the electromagnet both at a fixed position and moving along the tube. Exemplary measurements show that an information transmission is feasible in both approaches and with all tested flow rates. 

    The feasibility study hence shows that particle steering by use of magnetic fields is a viable approach, which is even robust against flow rate variations. It can thus be used in MC to address different transmission channels as well as to realize differential signal transmission. Furthermore, it might help to improve magnetic drug targeting in future applications.  
    }, author = {Schlechtweg, Niklas and Meyer, Sebastian and Unterweger, Harald and Bartunik, Max and Ahmed, Doaa and Wicke, Wayan and Jamali Kooshkghazi, Vahid and Alexiou, Christoph and Fischer, Georg and Weigel, Robert and Schober, Robert and Kirchner, Jens}, booktitle = {14th EAI International Conference on Body Area Networks (BODYNETS 2019)}, cris = {https://cris.fau.de/converis/publicweb/publication/222443031}, year = {2019}, month = {10}, day = {02}, eventdate = {2019-10-02/2019-10-03}, faupublication = {yes}, keywords = {Superparamagnetic nanoparticles; particle steering; magnetic field; duct flow; molecular communication}, note = {unpublished}, peerreviewed = {automatic}, title = {Magnetic Steering of Superparamagnetic Nanoparticles in Duct Flow for Molecular Communication: A Feasibility Study}, venue = {Florenz, Italy}, }

  • K. Shi, S. Schellenberger, L. Weber, P. Wiedemann, F. Michler, T. Steigleder, A. Malessa, F. Lurz, C. Ostgathe, R. Weigel, and A. Koelpin, "Segmentation of Radar-Recorded Heart Sound Signals Using Bidirectional LSTM Networks" in 41st IEEE International Engineering in Medicine and Biology Conference, Berlin, Germany, 2019, pp. 6677-6680. [DOI] [Bibtex]
    @inproceedings{shi2019,
    abstract = {Sounds caused by the action of the heart reflect both its health as well as deficiencies and are examined by physicians since antiquity. Pathologies of the valves, e.g. insufficiencies and stenosis, cardiac effusion, arrhythmia, inflammation of the surrounding tissue and other diagnosis can be reached by experienced physicians. However, practice is needed to assess the findings correctly. Furthermore, stethoscopes do not allow for long-term monitoring of a patient. Recently, radar technology has shown the ability to perform continuous touchless and thereby burden-free heart sound measurements. In order to perform automated classification of the signals, the first and most important step is to segment the heart sounds into their physiological phases. This paper examines the use of different Long Short-Term Memory (LSTM) architectures for this purpose based on a large dataset of radar-recorded heart sounds gathered from 30 different test persons in a clinical study. The best-performing network, a bidirectional LSTM, achieves a sample-wise accuracy of 93.4% and a F1 score for the first heart sound of 95.8%.
    }, author = {Shi, Kilin and Schellenberger, Sven and Weber, Leon and Wiedemann, Philipp and Michler, Fabian and Steigleder, Tobias and Malessa, Anke and Lurz, Fabian and Ostgathe, Christoph and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {41st IEEE International Engineering in Medicine and Biology Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/215822199}, year = {2019}, month = {10}, day = {07}, doi = {10.1109/EMBC.2019.8857863}, eventdate = {2019-07-23/2019-07-27}, faupublication = {yes}, issn = {1557-170X}, keywords = {Heart;Electrocardiography;Radar;Logic gates;Medical services;Radar antennas;Pathology}, pages = {6677--6680}, peerreviewed = {Yes}, title = {Segmentation of Radar-Recorded Heart Sound Signals Using Bidirectional LSTM Networks}, type = {Konferenzschrift}, url = {https://ieeexplore.ieee.org/document/8857863}, venue = {Berlin, Germany}, }
  • S. Erhardt, T. Kurin, F. Lurz, R. Weigel, and A. Koelpin, "An Open-Source Speech Codec at 450 bit/s with Pseudo-Wideband Mode" in European Microwave Conference 2019, Paris, France, 2019. [Bibtex]
    @inproceedings{erhardt2019a,
    author = {Erhardt, Stefan and Kurin, Thomas and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    booktitle = {European Microwave Conference 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/216077309},
    year = {2019},
    month = {10},
    day = {29},
    eventdate = {2019-09-29/2019-10-04},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {An Open-Source Speech Codec at 450 bit/s with Pseudo-Wideband Mode},
    type = {Konferenzschrift},
    venue = {Paris, France},
    }
  • V. Silva Cortes, J. Nowak, V. Chauhan, U. Stehr, M. A. Hein, G. Fischer, and A. Hagelauer, "RF MEMS Modules: A Multiphysical Design Methodology Based on System Performance Requirements", IEEE Microwave Magazine, vol. 20, iss. 10, pp. 44-55, 2019. [DOI] [Bibtex]
    @article{silva2019,
    author = {Silva Cortes, Victor and Nowak, Jacek and Chauhan, Vikrant and Stehr, Uwe and Hein, Matthias A. and Fischer, Georg and Hagelauer, Amelie},
    cris = {https://cris.fau.de/converis/publicweb/publication/226996488},
    year = {2019},
    month = {10},
    day = {01},
    doi = {10.1109/MMM.2019.2928676},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {10},
    pages = {44--55},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {RF MEMS Modules: A Multiphysical Design Methodology Based on System Performance Requirements},
    type = {Review article},
    volume = {20},
    }
  • U. Stehr, A. Hagelauer, and M. A. Hein, "SiCer: Meeting the Challenges of Tomorrow's Complex Electronic Systems [From the Guest Editors' Desk]", IEEE Microwave Magazine, vol. 20, iss. 10, pp. 26-92, 2019. [DOI] [Bibtex]
    @article{stehr2019,
    author = {Stehr, Uwe and Hagelauer, Amelie and Hein, Matthias A.},
    cris = {https://cris.fau.de/converis/publicweb/publication/226996239},
    year = {2019},
    month = {10},
    day = {01},
    doi = {10.1109/MMM.2019.2928614},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {10},
    pages = {26--92},
    peerreviewed = {unknown},
    shortjournal = {IEEE MICROW MAG},
    title = {SiCer: Meeting the Challenges of Tomorrow's Complex Electronic Systems [From the Guest Editors' Desk]},
    volume = {20},
    }
  • V. Chauhan, C. Huck, A. Frank, W. Akstaller, R. Weigel, and A. Hagelauer, "Enhancing RF Bulk Acoustic Wave Devices: Multiphysical Modeling and Performance", IEEE Microwave Magazine, vol. 20, iss. 10, pp. 56-70, 2019. [DOI] [Bibtex]
    @article{chauhan2019a,
    abstract = {The rapid proliferation of smartphones, tablets, and intelligent wearables is proof of the global success of high-performance RF acoustic devices based on bulk acoustic wave (BAW) and surface acoustic wave (SAW) technologies. Advanced wireless communication standards, such as 4G/LTE and the upcoming 5G, make the implementation of new RF features (power handling, wider bandwidth, and reconfigurability) mandatory in modern end-user equipment for mobile communications. This leads to an increasing demand for SAW and BAW components due to their compatibility with higher frequencies. In the year 2020, shipments of RF filters will exceed 68 billion (Figure 1), of which about 40 billion will be high-performance filters, such as film bulk acoustic resonators (FBARs), high quality factor (Q) BAW components, temperature-compensated (TC) SAW components, and thin-film SAW components [1]-[3].},
    author = {Chauhan, Vikrant and Huck, Christian and Frank, Astrid and Akstaller, Wolfgang and Weigel, Robert and Hagelauer, Amelie},
    cris = {https://cris.fau.de/converis/publicweb/publication/226996738},
    year = {2019},
    month = {10},
    day = {01},
    doi = {10.1109/MMM.2019.2928677},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {10},
    pages = {56--70},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {Enhancing RF Bulk Acoustic Wave Devices: Multiphysical Modeling and Performance},
    volume = {20},
    }
  • D. Ahmed, H. Unterweger, G. Fischer, R. Schober, and J. Kirchner, "Characterization of an Inductance-based Detector in Molecular Communication Testbed Based on Superparamagnetic Iron Oxide Nanoparticles" in IEEE SENSORS 2019, Montreal, Canada, Canada, 2019. [Bibtex]
    @inproceedings{ahmed2019a,
    abstract = {Molecular communication (MC), using chemicals or particles, is a promising approach to bridge the gaps of
    conventional communication systems, e.g. in nano-scale or in pipelines. Our testbed depends on superparamagnetic iron oxide nanoparticles (SPIONs) as information carriers, which are detected using a susceptometer. In this paper, we study how the position and distribution of particles near the susceptometer,
    i.e., coil, affect its detected signal. When the particles move axially through the coil, an increment in the signal is detected. In addition, we observed a nonlinear additive behaviour of inductance in the same axial direction, i.e., changes in inductance due to partial volumes are not additive. An exponentially-like signal is detected when the particles move radially through the coil. Moreover, a linear additive behaviour of inductance is
    observed in this direction. Increasing the magnetic susceptibility has a significant effect on the detected signal. However, the susceptibility of SPIONs is relatively small in order to keep superparamagnetic properties. The coil inductance depends not only on the volume, or permeability of magnetic particles in its core, but also on how they are distributed inside.  
    }, author = {Ahmed, Doaa and Unterweger, Harald and Fischer, Georg and Schober, Robert and Kirchner, Jens}, language = {English}, booktitle = {IEEE SENSORS 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/227807202}, year = {2019}, month = {10}, day = {27}, eventdate = {2019-10-27/2019-10-30}, faupublication = {yes}, keywords = {molecular communication,superparamagnetic nanoparticles,simulation,MC testbed,coils,magnetic fields}, peerreviewed = {unknown}, title = {Characterization of an Inductance-based Detector in Molecular Communication Testbed Based on Superparamagnetic Iron Oxide Nanoparticles}, type = {Konferenzschrift}, venue = {Montreal, Canada, Canada}, }
  • M. Völkel, M. Dietz, A. Hagelauer, E. M. Hussein, D. Kissinger, and R. Weigel, "A Digital Adjustable Fully Integrated Bistatic Interferometric Radar Transceiver at 60 GHz in a 130 nm BiCMOS Technology" in EUMW, Paris, France, 2019. [Bibtex]
    @inproceedings{voelkel2019c,
    abstract = {In this paper a 60 GHz monolithic bistatic interferometric
    radar transceiver for high precision measuring is
    presented. The integrated transceiver has been designed using
    a 0.13μm SiGe BiCMOS process from IHP (SG13G2) and
    includes a LNA, a passive six-port structure, detectors, multiplier,
    multiplexer, power amplifier and a digital interface. The chip has
    a size of 2330μm x 1360μm and a maximum power consumption
    of 533mW from a 3.3V power supply. The circuit provides two
    frequency inputs of 7.5 and 15GHz and multiplies them up to
    60 GHz at a minimum input power of -20 dBm. The chip delivers
    a maximum output power of 9dBm at 61 GHz. The input path
    is selectable and the output power is adjustable by a digital
    interface between -23 and 9dBm at 60 GHz. Also the reference
    input power of the six-port and the RF input power can be
    adjusted in a range of 13.2 dB. The minimum input referred
    P1dB is -24.1 dBm. With a multiplexer, the receiver reference can
    be separated from the transmitter, which allows the use of both
    independently from each other. The serial interface is realized
    in 0.13μm CMOS logic and consists of a 20 bit shift register,
    decoder and an analog interface.
    }, author = {Völkel, Matthias and Dietz, Marco and Hagelauer, Amelie and Hussein, E. M. and Kissinger, Dietmar and Weigel, Robert}, language = {English}, booktitle = {EUMW}, cris = {https://cris.fau.de/converis/publicweb/publication/216063791}, year = {2019}, month = {10}, day = {01}, eventdate = {2019-09-29/2019-10-04}, faupublication = {yes}, keywords = {bistatic radar; digital adjustable; industrial radar; integrated transceiver; interferometric radar; millimeter wave circuits; SiGe BiCMOS; six-port}, peerreviewed = {unknown}, title = {A Digital Adjustable Fully Integrated Bistatic Interferometric Radar Transceiver at 60 GHz in a 130 nm BiCMOS Technology}, type = {Konferenzschrift}, venue = {Paris, France}, }
  • D. Ahmed, J. Kirchner, and G. Fischer, "Signal Transmission with Intra-body and Inter-body Communications (Simulation-based Models)" in 13th EAI International Conference on Body Area Networks (BODYNETS 2018), Oulu, Finland, 2019. [Bibtex]
    @inproceedings{ahmed2018,
    abstract = {In this paper, we investigate two types of data transmission in human body communication (HBC) with galvanic coupling: Intra-body communication along a human arm and inter-body communication between
    two arms in touch. For the former, the effect of bending the arm is investigated, too. The arms were modeled
    as five-layers concentric cylinders of different types of tissue. For simulation, the finite element method (FEM) COMSOL Multiphysics5.3a software was used. The influence of different HBC key parameters including applied frequency, distance between transmitter (TX) and receiver (RX), bending, contact area between the contiguous models, and induced current were investigated. The results show that the transmission loss increases with the increase of the transmission length and operating frequency. The electrical potential is directly proportional to the induced current. Bending helps to improve the detected signal in the cases of short distance between TX and RX around the curvature. For distant transceivers, both straight and bended models tend to behave in a close manner. However, no joints are added to the model. The signal degradation in inter-body communication is considerably higher compared to intra-body communication at the same horizontal distance between TX and RX. At frequencies above 200 kHz, both inter-body and intra-body communication give close values when the contact area between the arms covers the distance between TX and RX electrodes. In addition, by increasing the contact area and avoiding gaps between the models, the detected signal is improved. The results illustrate the main determinants of information transmission between both sensors within a body-sensors-network and between different person.
    }, author = {Ahmed, Doaa and Kirchner, Jens and Fischer, Georg}, language = {English}, booktitle = {13th EAI International Conference on Body Area Networks (BODYNETS 2018)}, cris = {https://cris.fau.de/converis/publicweb/publication/203249033}, year = {2019}, month = {10}, day = {02}, eventdate = {2018-10-02/2018-10-03}, faupublication = {yes}, keywords = {Cole-Cole expressions; dielectric properties; human tissue; finite element model; galvanic coupling; human body communication; inter-body communication; intra-body communication}, peerreviewed = {Yes}, title = {Signal Transmission with Intra-body and Inter-body Communications (Simulation-based Models)}, type = {Konferenzschrift}, venue = {Oulu, Finland}, }
  • J. Budroweit, S. Mueller, M. Jaksch, R. Garcia Alía, A. Coronetti, and A. Koelpin, "In-Situ Testing of a Multi-Band Software-Defined Radio Platform in a Mixed-Field Irradiation Environment", Aerospace, vol. 6, iss. 10, 2019. [DOI] [Bibtex]
    @article{budroweit2019,
    abstract = {This paper presents an in-situ test concept for a multi-band software-defined radio (SDR) platform in a mixed-field radiation environment. Special focus is given to the complex automated test setup with respect to the requirements of the irradiation facility. Additionally, selected test results of a system-level evaluation are presented and discussed. For the verification of the mixed-field radiation environment, the software-defined radio (SDR) was also tested under proton irradiation. The cross-sections for the observed single event eects are compared and show similar results.
    }, author = {Budroweit, Jan and Mueller, Steffen and Jaksch, Matthis and Garcia Alía, Rubén and Coronetti, Andrea and Koelpin, Alexander}, language = {English}, cris = {https://cris.fau.de/converis/publicweb/publication/227080660}, year = {2019}, month = {10}, day = {25}, doi = {10.3390/AEROSPACE6100106}, faupublication = {no}, issn = {2226-4310}, journaltitle = {Aerospace}, keywords = {in-situ testing; automated test setup; mixed-field irradiation; total dose effects; single event effects; software-defined radio;}, number = {10}, peerreviewed = {Yes}, title = {In-Situ Testing of a Multi-Band Software-Defined Radio Platform in a Mixed-Field Irradiation Environment}, type = {Article in Journal}, url = {https://www.mdpi.com/2226-4310/6/10/106/pdf}, volume = {6}, }
  • S. Pfeiffer, S. Meyer, O. Amft, D. Anzai, J. Wang, G. Fischer, and J. Kirchner, "Motion-Induced Imbalance of Contact Impedance in ECG Capture: Comparison of Electrode Materials in Capacitive Coupling" in IEEE SENSORS 2019, Montréal, Canada, 2019 (to be published). [Bibtex]
    @inproceedings{pfeiffer2019,
    abstract = {Differences in contact impedance of the ECG measurement electrodes lead to asymmetries of the signal paths and thus result in reduced common-mode rejection and artifacts. Here, the imbalance of contact impedance is investigated for different types of electrodes with capacitive coupling in terms of static imbalance as well as dynamic variation during body movement. Flexible and incompressible materials like conductive foam and fabric showed the best overall performance. The negative effect of rigidity can partly be compensated by adding conducting foam, while soft materials can profit from an increase of electrode area.  
    }, author = {Pfeiffer, Sebastian and Meyer, Sebastian and Amft, Oliver and Anzai, Daisuke and Wang, Jianqing and Fischer, Georg and Kirchner, Jens}, language = {English}, booktitle = {IEEE SENSORS 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/222439487}, year = {2019}, month = {10}, day = {27}, eventdate = {2019-10-27/2019-10-30}, faupublication = {yes}, note = {unpublished}, peerreviewed = {automatic}, title = {Motion-Induced Imbalance of Contact Impedance in ECG Capture: Comparison of Electrode Materials in Capacitive Coupling}, venue = {Montréal, Canada}, }
  • A. Schade, F. Klotz, S. Jahn, and R. Weigel, "S-EHRFEM - Substrate Extraction using Highly Reduced FEM-meshes for Transient SPICE-simulation with Iterative Linear Solvers" in EMC Europe 2019 - 2019 International Symposium on Electromagnetic Compatibility, Barcelona, Spain, 2019, pp. 812-819. [DOI] [Bibtex]
    @inproceedings{schade2019,
    abstract = {The nouveau S-EHRFEM approach to substrate extraction is based on a mathematical technique which strongly reduces the FEM-discretized Laplace equation in three dimensions. It reduces the nets by almost two orders of magnitude and the resistors by roughly one order of magnitude at an error bound < 10%. This translates into over an order of magnitude speedup of a transient circuit simulation using GMRES. The resulting model is reciprocal, reference-independent, charge-conserving and, under some weak assumptions, passive. This guarantees simulation stability and accuracy.},
    author = {Schade, Alexander and Klotz, Frank and Jahn, Stefan and Weigel, Robert},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {EMC Europe 2019 - 2019 International Symposium on Electromagnetic Compatibility},
    cris = {https://cris.fau.de/converis/publicweb/publication/228997669},
    year = {2019},
    month = {09},
    day = {01},
    doi = {10.1109/EMCEUROPE.2019.8872008},
    eventdate = {2019-09-02/2019-09-06},
    eventtitle = {2019 International Symposium on Electromagnetic Compatibility, EMC Europe 2019},
    faupublication = {yes},
    isbn = {9781728105932},
    keywords = {fast-multipole BEM co-simulation; FEM co-simulation; GMRES; iterative linear solver; parasitic extraction; substrate extraction},
    pages = {812--819},
    peerreviewed = {unknown},
    title = {S-EHRFEM - Substrate Extraction using Highly Reduced FEM-meshes for Transient SPICE-simulation with Iterative Linear Solvers},
    venue = {Barcelona, Spain},
    }
  • B. Scheiner, F. Lurz, F. Michler, R. Weigel, and A. Koelpin, "Frequency Response Characterization of Surface Acoustic Wave Resonators Using a Six-Port Frequency Measurement System" in Kleinheubacher Tagung, Miltenberg, 2019. [Bibtex]
    @inproceedings{scheiner2019e,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    booktitle = {Kleinheubacher Tagung},
    cris = {https://cris.fau.de/converis/publicweb/publication/227012865},
    year = {2019},
    month = {09},
    day = {23},
    eventdate = {2019-09-23/2019-09-25},
    faupublication = {yes},
    isbn = {9783948571009},
    peerreviewed = {unknown},
    title = {Frequency Response Characterization of Surface Acoustic Wave Resonators Using a Six-Port Frequency Measurement System},
    type = {Konferenzschrift},
    url = {https://ieeexplore.ieee.org/document/8890082},
    venue = {Miltenberg},
    }
  • M. Bartunik, M. Lübke, H. Unterweger, C. Alexiou, S. Meyer, D. Ahmed, G. Fischer, W. Wicke, V. Jamali Kooshkghazi, R. Schober, and J. Kirchner, "Novel Receiver for Superparamagnetic Iron Oxide Nanoparticles in a Molecular Communication Setting" in Proceedings of the 6th ACM International Conference on Nanoscale Computing and Communication, NANOCOM 2019, Dublin, Ireland, 2019. [DOI] [Bibtex]
    @inproceedings{bartunik2020,
    abstract = {Superparamagnetic iron oxide nanoparticles (SPIONs) have recently been introduced as information carriers in a testbed for molecular communication (MC) in duct flow. Here, a new receiver for this testbed is presented, based on the concept of a Wheatstone bridge. The capability for a reliable transmission using the testbed and detection of the proposed receiver was evaluated by sending a text message and a 80 bit random sequence at a bit rate of 1/s, which resulted in a bit error rate of 0 %. Furthermore, the sensitivity of the device was assessed by a dilution series, which gave a limit of detectability of peaks between 0:1 to 0:5 mg/mL. Compared to the commercial susceptometer that was previously used as receiver, the new detector provides an increased sampling rate of 100 samples/s and flexibility in the dimensions of the propagation channel. Furthermore, it allows to implement both single-ended and differential signaling in SPION-bases MC testbeds  
    }, author = {Bartunik, Max and Lübke, Maximilian and Unterweger, Harald and Alexiou, Christoph and Meyer, Sebastian and Ahmed, Doaa and Fischer, Georg and Wicke, Wayan and Jamali Kooshkghazi, Vahid and Schober, Robert and Kirchner, Jens}, language = {English}, publisher = {Association for Computing Machinery, Inc}, booktitle = {Proceedings of the 6th ACM International Conference on Nanoscale Computing and Communication, NANOCOM 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/222425642}, year = {2019}, month = {09}, day = {25}, doi = {10.1145/3345312.3345483}, eventdate = {2019-09-25/2019-09-27}, eventtitle = {6th ACM International Conference on Nanoscale Computing and Communication, NANOCOM 2019}, faupublication = {yes}, isbn = {9781450368971}, keywords = {Molecular communication; superparamagnetic iron oxide nanoparticles; SPION; differtial signaling; receiver}, peerreviewed = {unknown}, title = {Novel Receiver for Superparamagnetic Iron Oxide Nanoparticles in a Molecular Communication Setting}, type = {Konferenzschrift}, venue = {Dublin, Ireland}, }
  • M. Stephan, K. Wang, T. Reißland, R. Weigel, K. Wu, and F. Lurz, "Evaluation of Antenna Calibration and DOA Estimation Algorithms for FMCW Radars" in European Microwave Week, Paris, France, 2019 (to be published). [Bibtex]
    @inproceedings{stephan2019,
    author = {Stephan, Michael and Wang, Kuangda and Reißland, Torsten and Weigel, Robert and Wu, Ke and Lurz, Fabian},
    booktitle = {European Microwave Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/210965714},
    year = {2019},
    month = {09},
    day = {29},
    eventdate = {2019-09-29/2019-10-04},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Evaluation of Antenna Calibration and DOA Estimation Algorithms for FMCW Radars},
    venue = {Paris, France},
    }
  • J. Lichtblau, F. Lurz, B. Sanftl, R. Weigel, and A. Koelpin, "Development of a novel channel model for train-onboard communication in commuter traffic at 100 km/h" in Kleinheubacher Tagung, Miltenberg, Germany, 2019. [Bibtex]
    @inproceedings{lichtblau2019b,
    author = {Lichtblau, Johann and Lurz, Fabian and Sanftl, Benedikt and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {Kleinheubacher Tagung},
    cris = {https://cris.fau.de/converis/publicweb/publication/227900463},
    year = {2019},
    month = {09},
    day = {23},
    eventdate = {2019-09-22/2019-09-25},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Development of a novel channel model for train-onboard communication in commuter traffic at 100 km/h},
    type = {Konferenzschrift},
    venue = {Miltenberg, Germany},
    }
  • K. Reiser, J. Twynam, C. Eckl, H. Brech, and R. Weigel, "Influence of accurate electron drift velocity modelling on the electrical characteristics in gan-on-si hemts" in International Conference on Simulation of Semiconductor Processes and Devices, SISPAD, Udine, Italy, 2019. [DOI] [Bibtex]
    @inproceedings{reiser2019,
    abstract = {The influence of an accurate electron velocity-field relationship modelling on pulsed IV and small-signal RF characteristics in GaN-on-Si HEMTs is discussed and compared to measurements. We show by technology computer-Aided design (TCAD) simulation and measurements that not only the lowfield mobility and saturation velocity are of great importance, but also the transition behaviour in between has to be modelled accurately. Experimentally, we extract the velocity-field relationship using device simulation and measured data with ultra short pulse lengths. To the best of our knowledge, this is the first study on the velocity-field relationship in GaN-on-Si devices.},
    author = {Reiser, Korbinian and Twynam, John and Eckl, Christian and Brech, Helmut and Weigel, Robert},
    editor = {Driussi, Francesco},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {International Conference on Simulation of Semiconductor Processes and Devices, SISPAD},
    cris = {https://cris.fau.de/converis/publicweb/publication/228997913},
    year = {2019},
    month = {09},
    day = {01},
    doi = {10.1109/SISPAD.2019.8870417},
    eventdate = {2019-09-04/2019-09-06},
    eventtitle = {24th International Conference on Simulation of Semiconductor Processes and Devices, SISPAD 2019},
    faupublication = {yes},
    isbn = {9781728109404},
    keywords = {Gallium nitride; GaN-on-Si; saturation velocity; TCAD; velocity field curve},
    peerreviewed = {unknown},
    title = {Influence of accurate electron drift velocity modelling on the electrical characteristics in gan-on-si hemts},
    venue = {Udine, Italy},
    volume = {2019-September},
    }
  • M. Trautmann, B. Sanftl, R. Weigel, and A. Koelpin, "Simultaneous Inductive Power and Data Transmission System for Smart Applications", Ieee Circuits and Systems Magazine, vol. 19, iss. 3, pp. 23-33, 2019. [DOI] [Bibtex]
    @article{trautmann2018,
    abstract = {Inductive power transfer (IPT) development is a big issue amongst the scientific community but there are only few solutions for communication between the primary and secondary side. This article presents a completely contactless near field system, which can provide power and data simultaneously using one common inductive power link. In this novel approach both transmission channels are designed collaboratively to maximise their performance. Based on these joint system specifications, the requirements for each system are derived, analysed, simulated and measured. From this measurement the performance of the system is classified. To verify the joint specifications, the mutual interferences are evaluated and the system is compared to the state of the art. As a result, a prototype, which can provide 20W of power with a simultaneous data transfer of 461 kbit/s, is presented. With tested bit error rates smaller than 10-6, this communication link is a fully classified robust and reliable data link for IPT applications.},
    author = {Trautmann, Martin and Sanftl, Benedikt and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/123293544},
    year = {2019},
    month = {08},
    day = {13},
    doi = {10.1109/MCAS.2019.2924508},
    faupublication = {yes},
    issn = {1531-636X},
    journaltitle = {Ieee Circuits and Systems Magazine},
    number = {3},
    pages = {23--33},
    peerreviewed = {Yes},
    shortjournal = {IEEE CIRC SYST MAG},
    title = {Simultaneous Inductive Power and Data Transmission System for Smart Applications},
    type = {Review article},
    volume = {19},
    }
  • T. Ehlenz, P. Lenz, G. Fischer, and A. Wittmann, "Auf dem Weg zum intelligenten Kabel", ETZ, Elektrotechnik und Automation, pp. 62-65, 2019. [Bibtex]
    @article{ehlenz2019,
    abstract = {Gegenstände unserer Umwelt werden zunehmend „intelligent“ und koordinieren sich untereinander. Fabrikationsanlagen sagen vorher, wann sie ausfallen. Autos optimieren gemeinsam den Verkehrsfluss. Smartphones überwachen die Gesundheit ihrer Besitzer. Für die teilweise kritischen Verbindungen, die durch Strom- oder Datenleitungen realisiert werden, gilt dies bis dato noch nicht. Die forensischen Betrachtungen von Kabeln und Leitungen im Kabellabor der Hochschule Trier ermöglichen es, dass dies nun auch für Leitungen in greifbare Nähe rückt.


    }, author = {Ehlenz, Tobias and Lenz, Philipp and Fischer, Georg and Wittmann, Armin}, cris = {https://cris.fau.de/converis/publicweb/publication/224658852}, year = {2019}, month = {08}, faupublication = {yes}, issn = {0948-7387}, journaltitle = {ETZ, Elektrotechnik und Automation}, pages = {62--65}, peerreviewed = {unknown}, title = {Auf dem Weg zum intelligenten Kabel}, }

  • M. Völkel, M. Thouabtia, S. Breun, K. Aufinger, R. Weigel, and A. Hagelauer, "A Signal Source Chip at 140 GHz and 160 GHz for Radar Applications in a SiGe Bipolar Technology" in MWSCAS, Dallas, USA, 2019. [Bibtex]
    @inproceedings{voelkel2019d,
    abstract = {In this paper, a monolithic signal source chip at
    140 GHz and 160 GHz including two VCOs, a dynamic divider
    and a static divider chain is presented. Two signal sources with
    these high fundamental frequencies are realized. All components
    have been designed using a 0.13μm 250 GHz fT SiGe BiCMOS
    technology. The whole integrated circuit has a size of 930μm
    x 600μm including bondpads and consumes 210mA from a
    3.3V and 130mA from a 1.8V supply. The oscillators cover
    a frequency range from 119.3–147.7 GHz and 154.2–164 GHz,
    which results in a tuning range of 28.4 GHz and 9.8 GHz. A
    output power of -0.9/3.6dBm with a best case phase noise of
    -111.2/-108 dBc/Hz at 1MHz offset, measured at the divider
    output for PLL stabilization is achieved.
    }, author = {Völkel, Matthias and Thouabtia, Mohamed and Breun, Sascha and Aufinger, Klaus and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {MWSCAS}, cris = {https://cris.fau.de/converis/publicweb/publication/217336772}, year = {2019}, month = {08}, day = {05}, eventdate = {2019-08-04/2019-08-07}, faupublication = {yes}, keywords = {FMCW; industrial radar; millimeter-wave; oscillator; signal source; VCO.}, peerreviewed = {unknown}, title = {A Signal Source Chip at 140 GHz and 160 GHz for Radar Applications in a SiGe Bipolar Technology}, type = {Konferenzschrift}, venue = {Dallas, USA}, }
  • R. Ciocoveanu, R. Weigel, and A. Hagelauer, "Modified Gilbert-Cell Mixer with an LO Waveform Shaper and Switched Gate-Biasing for 1/f Noise Reduction in 28 nm CMOS", IEEE Transactions on Circuits and Systems Ii-Express Briefs, 2019. [Bibtex]
    @article{ciocoveanu2019b,
    author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/221117898},
    year = {2019},
    month = {08},
    faupublication = {yes},
    issn = {1549-7747},
    journaltitle = {IEEE Transactions on Circuits and Systems Ii-Express Briefs},
    peerreviewed = {Yes},
    shortjournal = {IEEE T CIRCUITS-II},
    title = {Modified Gilbert-Cell Mixer with an LO Waveform Shaper and Switched Gate-Biasing for 1/f Noise Reduction in 28 nm CMOS},
    }
  • S. Linz, F. Lurz, R. Weigel, and A. Koelpin, "Squircle-Based Calibration Algorithm for Six-Port Radar", IEEE Transactions on Microwave Theory and Techniques, 2019. [DOI] [Bibtex]
    @article{linz2019a,
    author = {Linz, Sarah and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    cris = {https://cris.fau.de/converis/publicweb/publication/225573420},
    year = {2019},
    month = {08},
    day = {14},
    doi = {10.1109/TMTT.2019.2931968},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Squircle-Based Calibration Algorithm for Six-Port Radar},
    type = {Article in Journal},
    }
  • J. Potschka, C. Söll, J. Kirchner, C. Mardin, M. Stadelmayer, T. Maiwald, S. Breun, K. Kolb, A. Bauch, M. Dietz, C. Beck, M. Völkel, A. Hagelauer, and R. Weigel, "Design of an Integrated Subretinal Implant Using Cellular Neural Networks for Binary Image Generation in a 130 nm BiCMOS Process" in IEEE Engineering in Medicine and Biology Conference (EMBC), Berlin, 2019. [Bibtex]
    @inproceedings{potschka2019,
    author = {Potschka, Julian and Söll, Christopher and Kirchner, Jens and Mardin, Christian and Stadelmayer, Markus and Maiwald, Tim and Breun, Sascha and Kolb, Katharina and Bauch, Andreas and Dietz, Marco and Beck, Christopher and Völkel, Matthias and Hagelauer, Amelie and Weigel, Robert},
    booktitle = {IEEE Engineering in Medicine and Biology Conference (EMBC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/217754593},
    year = {2019},
    month = {07},
    day = {23},
    eventdate = {2019-07-23/2019-07-27},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Design of an Integrated Subretinal Implant Using Cellular Neural Networks for Binary Image Generation in a 130 nm BiCMOS Process},
    type = {Konferenzschrift},
    venue = {Berlin},
    }
  • N. Duda, S. Ripperger, F. Mayer, R. Weigel, and A. Koelpin, "Extensive Wireless Sensor System for Proximity Sensing and Sensor-Based Vital Parameter Detection for BATS" in International Bat Research Conference (IBRC), Phuket, Thailand, 2019. [Bibtex]
    @inproceedings{duda2019b,
    author = {Duda, Niklas and Ripperger, Simon and Mayer, Frieder and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {International Bat Research Conference (IBRC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/222789593},
    year = {2019},
    month = {07},
    day = {28},
    eventdate = {2019-07-28/2019-08-01},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Extensive Wireless Sensor System for Proximity Sensing and Sensor-Based Vital Parameter Detection for BATS},
    type = {Abstract zum Poster},
    venue = {Phuket, Thailand},
    }
  • A. Ali and G. Fischer, "Enabling Fake Base Station Detection through Sample-based Higher Order Noise Statistics" in 2019 42nd International Conference on Telecommunications and Signal Processing, TSP 2019, Budapest, Hungary, Hungary, 2019, pp. 695-700. [DOI] [Bibtex]
    @inproceedings{ali2019c,
    abstract = {This paper presents computationally efficient fake base station (FBS) detection scheme through higher order statistical analysis at the user equipment (UE) side. In the proposed RF fingerprinting detection scheme, the UE inspects surrounding base stations (BS) by first extracting noise from the received signal through novel sample-based parametric estimation technique and then measuring the noise structuredness with the aid of fourth order moment i.e. kurtosis over the estimated noise samples. This reveals unique RF fingerprints of the legitimized regular base station (RBS) in terms of hardware impairments and resultantly indicates minimal impact from the non-linearities due to employment of costly and high precision analog and mixedsignal components, strong network-synchronous clock and a sophisticated linearization effort around the power amplifier (PA). In contrary, FBS exhibits different RF fingerprints containing larger amount of non-linearities in the received signal due to presence of large impairments. With the help of actual measurement results from RBS and various software defined radio (SDR) based FBS at different cellular standards and by defining a critical threshold of detection, we show that an FBS deviates a lot from the ideal Gaussian noise distribution and constitutes of multivariate distributions, whereas an RBS show minimal deviation from the reference and contains univariate noise distribution. We further calculate the observation sample time required to detect an FBS in an optimal MMSE sense and indicate with the help of results that the minimum time to identify a fake cell is 10ms.
    }, author = {Ali, Arslan and Fischer, Georg}, editor = {Herencsar, Norbert}, language = {English}, publisher = {Institute of Electrical and Electronics Engineers Inc.}, booktitle = {2019 42nd International Conference on Telecommunications and Signal Processing, TSP 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/216263241}, year = {2019}, month = {07}, day = {01}, doi = {10.1109/TSP.2019.8769046}, eventdate = {2019-07-01/2019-07-03}, eventtitle = {42nd International Conference on Telecommunications and Signal Processing, TSP 2019}, faupublication = {yes}, isbn = {9781728118642}, keywords = {fake base station; hardware imperfections; higher order statistics; kurtosis; multivariate distribution; parametric noise estimation; physical layer security; RF fingerprinting; software defined radio}, pages = {695--700}, peerreviewed = {unknown}, title = {Enabling Fake Base Station Detection through Sample-based Higher Order Noise Statistics}, venue = {Budapest, Hungary, Hungary}, }
  • I. Lau, F. Lurz, R. Weigel, and A. Koelpin, "An Error Compensation Algorithm for Indirect Resonant Planar Relative Permittivity Sensor Principles up to 100 GHz" in IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes, Bochum, 2019. [Bibtex]
    @inproceedings{lau2019b,
    abstract = {This paper presents an error compensation algorithm for indirect resonant planar relative permittivity sensor principles up to 100 GHz. Besides the measurement of the material under test (MUT), the algorithm requires additional measurements of at least two reference materials. The proposed algorithm is tested for the three most relevant modeling errors occurring while measuring with an indirect planar measurement principle. These include erroneous assumptions regarding the geometrical dimensions, the effective roughness and the air gap
    between the sensor and the MUT. The proposed algorithm results in an average improvement of the error of the extracted relativen permittivity values of 90.46 %.
    }, author = {Lau, Isabella and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes}, cris = {https://cris.fau.de/converis/publicweb/publication/219143376}, year = {2019}, month = {07}, day = {16}, eventdate = {2019-07-16/2019-07-18}, faupublication = {yes}, keywords = {error compensation; materials nondestructive testing,microwave measurements; permittivity}, peerreviewed = {Yes}, title = {An Error Compensation Algorithm for Indirect Resonant Planar Relative Permittivity Sensor Principles up to 100 GHz}, type = {Konferenzschrift}, venue = {Bochum}, }
  • T. Reißland, B. Lenhart, J. Lichtblau, M. Sporer, R. Weigel, and A. Koelpin, "Evaluation of a Robust Correlation based True-Speed-over-Ground Measurement System employing a FMCW Radar", International Journal of Microwave and Wireless Technologies, vol. 11, pp. 686-693, 2019. [DOI] [Bibtex]
    @article{reissland2019c,
    abstract = {
    This paper presents a novel approach for the determination of True-Speed-Over-Ground for trains. Speed determination is accomplished by correlating the received signals of two side-looking radar sensors. The theoretically achievable precision is derived. Test measurements are done in two different scenarios to give a prove of concept. Thereafter a series of field measurements is performed to rate the practical suitability of the approach. The results of the measurements are thoroughly evaluated. The test and field measurements are carried out using a 24 GHz frequency modulated continuous wave (FMCW) radar.
    }, author = {Reißland, Torsten and Lenhart, Björn and Lichtblau, Johann and Sporer, Michael and Weigel, Robert and Koelpin, Alexander}, language = {English}, cris = {https://cris.fau.de/converis/publicweb/publication/208578109}, year = {2019}, month = {07}, day = {22}, doi = {10.1017/S1759078719000928}, faupublication = {yes}, issn = {1759-0787}, journaltitle = {International Journal of Microwave and Wireless Technologies}, pages = {686--693}, peerreviewed = {Yes}, title = {Evaluation of a Robust Correlation based True-Speed-over-Ground Measurement System employing a FMCW Radar}, type = {Article in Journal}, volume = {11}, }
  • I. Lau, A. Hajian, F. Michler, G. Gold, F. Lurz, U. Schmid, K. Helmreich, R. Weigel, and A. Koelpin, "Influence of the PCB Manufacturing Process on the Measurement Error of Planar Relative Permittivity Sensors Up To 100 GHz", IEEE Transactions on Microwave Theory and Techniques, vol. 67, iss. 7, pp. 2793-2804, 2019. [DOI] [Bibtex]
    @article{lau2019,
    abstract = {Accurate and precise knowledge of the relative permittivity of printed circuit board (PCB) materials is essential for the reliable design of high-frequency circuits. For simplicity reasons, planar, resonant permittivity sensors, which are directly integrated on the unknown PCB material, are widely used. However, the sensors are affected by the nonidealities of the copper-clad laminate and PCB manufacturing process, e.g., the difference in roughness between the top and bottom sides of each metal layer. This paper analyzes the influence of these nonidealities on the extracted relative permittivity values of different sensor geometries in microstrip and substrate integrated waveguide (SIW) technology up to 100 GHz. Microstrip resonators are very sensitive against the investigated nonidealities. Additional roughness measurements and more detailed simulation models cannot noticeably reduce the uncertainties. SIW cavity sensors are more robust, and simple modeling approaches lead to low uncertainties smaller than 0.05 for the whole frequency range from 10 to 100 GHz.},
    author = {Lau, Isabella and Hajian, Ali and Michler, Fabian and Gold, Gerald and Lurz, Fabian and Schmid, Ulrich and Helmreich, Klaus and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/216484718},
    year = {2019},
    month = {07},
    day = {03},
    doi = {10.1109/TMTT.2019.2910114},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    keywords = {Accuracy;manufacturingn process; materials nondestructive testing; microwave measurements;permittivity; printed circuit boards (PCBs); surface roughness; uncertainty.},
    number = {7},
    pages = {2793--2804},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Influence of the PCB Manufacturing Process on the Measurement Error of Planar Relative Permittivity Sensors Up To 100 GHz},
    type = {Article in Journal},
    url = {https://ieeexplore.ieee.org/document/8698275},
    volume = {67},
    }
  • G. Fischer, A. Cwik, and D. Beaufort, "CEPT FGRXIM(19)002 Algorithm Requirements", 2019. [Bibtex]
    @other{fischer2019,
    author = {Fischer, Georg and Cwik, Andrzej and Beaufort, Daniel},
    editor = {ECO},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/221173084},
    year = {2019},
    month = {06},
    day = {04},
    faupublication = {yes},
    keywords = {RX Intermodulation,IP3},
    peerreviewed = {automatic},
    title = {CEPT FGRXIM(19)002 Algorithm Requirements},
    type = {Techreport},
    url = {https://www.cept.org/Documents/fg-on-receiver-intermodulation/51859/fgrxim-19-002_algorithm-requirements},
    }
  • V. Issakov, R. Ciocoveanu, R. Weigel, A. Geiselbrechtinger, and J. Rimmelspacher, "Highly-Integrated Low-Power 60 GHz Multichannel Transceiver for Radar Applications in 28 nm CMOS" in IEEE MTT-S International Microwave Symposium Digest, Boston, MA, USA, 2019, pp. 650-653. [Bibtex]
    @inproceedings{issakov2019,
    abstract = {We present a highly-integrated low-power 60 GHz multi-channel transceiver realized in a 28 nm bulk CMOS technology. The circuit integrates three receive (RX) and two transmit (TX) channels. A receive channel includes an LNA, a passive mixer and a transimpedance amplifier (TIA), while a transmit channel contains a three-stage transformer-coupled differential power amplifier (PA). Additionally, the transceiver integrates a local oscillator (LO) signal generation network comprising a voltage-controlled oscillator (VCO), LO buffers, power splitters, frequency divider and a passive distribution network. The VCO is realized as a push-push cross-coupled topology and is continuously tunable in the frequency range 57-to-72 GHz, while achieving a measured phase noise of -84 dBc/Hz at 1 MHz offset at 60 GHz. The entire transceiver dissipates 342 mW using a single 0.9 V supply. A single RX channel draws 33 mA, while a single TX consumes 43 mA. The circuit including pads occupies a chip area of only 1.9 mm × 2.5 mm, which is limited only by the separation necessary for isolation between the channels. The transceiver provides a competitive performance and is suitable for 60 GHz continuous-wave radar applications.},
    author = {Issakov, V. and Ciocoveanu, Radu and Weigel, Robert and Geiselbrechtinger, A. and Rimmelspacher, J.},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {IEEE MTT-S International Microwave Symposium Digest},
    cris = {https://cris.fau.de/converis/publicweb/publication/224167772},
    year = {2019},
    month = {06},
    day = {01},
    eventdate = {2019-06-02/2019-06-07},
    eventtitle = {2019 IEEE MTT-S International Microwave Symposium, IMS 2019},
    faupublication = {yes},
    isbn = {9781728113098},
    issn = {0149-645X},
    journaltitle = {IEEE MTT-S International Microwave Symposium Digest},
    keywords = {CMOS; radar; transceiver},
    pages = {650--653},
    peerreviewed = {unknown},
    title = {Highly-Integrated Low-Power 60 GHz Multichannel Transceiver for Radar Applications in 28 nm CMOS},
    venue = {Boston, MA, USA},
    volume = {2019-June},
    }
  • J. Fuchs, R. Weigel, and M. Gardill, "Single-Snapshot Direction-of-Arrival Estimation of Multiple Targets using a Multi-Layer Perceptron" in 2019 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM), Detroit, MI, USA, 2019, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{fuchs2019a,
    abstract = {An alternative approach to high-resolution direction-of-arrival estimation in the context of automotive FMCW signal processing is shown by training a neural network with simulation as well as experimental data to estimate the mean and distance of the azimuth angles from two targets. Testing results are post-processed to obtain the estimated azimuth angles which can be validated afterwards. The performance of the proposed neural network is then compared with a reference implementation of a maximum likelihood estimator. Final evaluations show super-resolution like performance with significantly reduced computation time, which is expected to have an impact on future multi-dimensional high-resolution DoA estimation.},
    author = {Fuchs, Jonas and Weigel, Robert and Gardill, Markus},
    language = {English},
    booktitle = {2019 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)},
    cris = {https://cris.fau.de/converis/publicweb/publication/211247235},
    year = {2019},
    month = {06},
    day = {03},
    doi = {10.1109/ICMIM.2019.8726554},
    eventdate = {2019-04-15/2019-04-16},
    faupublication = {yes},
    keywords = {Direction-of-arrival estimation;Training;Neural networks;Radar;Maximum likelihood estimation;Signal to noise ratio;Automotive Radar;Direction-of-Arrival Estimation;Neural Network;Multi-Layer Perceptron},
    pages = {1--4},
    peerreviewed = {unknown},
    title = {Single-Snapshot Direction-of-Arrival Estimation of Multiple Targets using a Multi-Layer Perceptron},
    type = {Konferenzschrift},
    venue = {Detroit, MI, USA},
    }
  • F. Michler, R. Weigel, and A. Koelpin, "Radar-Based Vital Sign Monitoring" in International Microwave Symposium (IMS), Boston, MA, USA, 2019. [Bibtex]
    @inproceedings{michler2019b,
    abstract = {The continuous measurement of human vital parameters is an important diagnostic tool in human medicine. Conventional measurement devices, such as the electrocardiograph (ECG) or the photoplethysmograph (PPG), require a direct contact to the patients, limiting their independence and mobility. These drawbacks can be overcome by using high-precision radar systems for a contactless monitoring of the patients. In this talk, the physiological parameters of interest, respiration and heartbeat and related diagnostic parameters, such as heartsounds and pulse wave propagation will be introduced. In the next step, their impact on the movement of the body surface will be derived. A suitable concept for a highly precise radar system combined with state-of-the-art algorithms will be presented, which is able to measure the required relative displacements of the patient’s skin. As proof of concept, the measurement results of a medical proband study will be shown and discussed in detail. This also includes a possible medical evaluation of the sensed parameters and an outlook on potential areas of application for the proposed systems.
    }, author = {Michler, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {International Microwave Symposium (IMS)}, cris = {https://cris.fau.de/converis/publicweb/publication/211576389}, year = {2019}, month = {06}, day = {07}, eventdate = {2019-06-02/2019-06-07}, faupublication = {yes}, peerreviewed = {unknown}, title = {Radar-Based Vital Sign Monitoring}, type = {Abstract zum Vortrag}, venue = {Boston, MA, USA}, }
  • K. Shi, S. Schellenberger, F. Michler, T. Steigleder, A. Malessa, F. Lurz, C. Ostgathe, R. Weigel, and A. Koelpin, "Automatic Signal Quality Index Determination of Radar-Recorded Heart Sound Signals Using Ensemble Classification", IEEE Transactions on Biomedical Engineering, 2019. [DOI] [Bibtex]
    @article{shi2019a,
    abstract = {Objective: Radar technology promises to be a
    touchless and thereby burden-free method for continuous
    heart sound monitoring which can be used to detect cardiovascular
    diseases. However, the first and most crucial step
    is to differentiate between high- and low-quality segments
    in a recording to assess their suitability for a subsequent
    automated analysis. This paper gives a comprehensive
    study on this task and firstly addresses the specific characteristics
    of radar-recorded heart sound signals. Methods:
    To gather heart sound signals recorded from radar, a
    bistatic radar system was built and installed at the university
    hospital. Under medical supervision, heart sound data
    were recorded from 30 healthy test subjects. The signals
    were segmented and labeled as high- or low-quality by a medical expert. Different state-of-the-art pattern classification
    algorithms were evaluated for the task of automated
    signal quality determination and the most promising one
    was optimized and evaluated using leave-one-subject-out cross-validation. Results: The proposed classifier is able to
    achieve an accuracy of up to 96.36% and demonstrates a
    superior classification performance compared to the stateof-
    the-art classifier with a maximum accuracy of 76.00 %.
    Conclusion: This paper introduces an ensemble classifier
    that is able to perform automated signal quality determination
    of radar-recorded heart sound signals with a
    high accuracy. Significance: Besides achieving a higher
    performance compared to state-of-the-art classifiers, the
    presented study is the first one to deal with the quality
    determination of heart sounds that are recorded by radar
    systems. The proposed method enables contactless and
    continuous heart sound monitoring for the detection of
    cardiovascular diseases.
    }, author = {Shi, Kilin and Schellenberger, Sven and Michler, Fabian and Steigleder, Tobias and Malessa, Anke and Lurz, Fabian and Ostgathe, Christoph and Weigel, Robert and Koelpin, Alexander}, cris = {https://cris.fau.de/converis/publicweb/publication/219338194}, year = {2019}, month = {06}, day = {05}, doi = {10.1109/TBME.2019.2921071}, faupublication = {yes}, issn = {0018-9294}, journaltitle = {IEEE Transactions on Biomedical Engineering}, keywords = {biomedical engineering; biomedical informatics; biomedical signal processing; heart sounds; medical radar,pattern recognition; phonocardiography}, peerreviewed = {Yes}, shortjournal = {IEEE T BIO-MED ENG}, title = {Automatic Signal Quality Index Determination of Radar-Recorded Heart Sound Signals Using Ensemble Classification}, type = {Article in Journal}, url = {https://ieeexplore.ieee.org/document/8731709}, }
  • H. Shinoda, D. Anzai, J. Kirchner, G. Fischer, and J. Wang, "A Study on Nonlinear Effect of Low-Frequency Modulated Radio Signals on Stimulus Response", IEICE Transactions on Communications, 2019. [Bibtex]
    @article{shinoda2019,
    abstract = {Stimulus response caused by low-frequency electromagnetic exposure can be used to realize effective medical treatments. However, it is well known that the membrane potential of nerve cells exhibits nonlinearity, particularly in the case of modulated signals, it is important to analyze the nonlinear stimulation effect based on a nerve cell model. This paper adopts the Frankenhaeuser–Huxley (FH) model as the nerve cell model, and evaluates the stimulus response based on the FH model when nerve cells are exposed to low-frequency modulated radio signals such as On-Off Keying (OOK) modulation. This paper investigated the nonlinear effect of the stimulus intensity from the viewpoint of the spike frequency with different modulation parameter values including the induced amplitude and duty cycle. It was confirmed that action potential (AP) rate was higher with OOK-type radio signals than with unmodulated signals. 
    }, author = {Shinoda, Hiroki and Anzai, Daisuke and Kirchner, Jens and Fischer, Georg and Wang, Jianqing}, cris = {https://cris.fau.de/converis/publicweb/publication/208638084}, year = {2019}, month = {06}, day = {30}, faupublication = {yes}, issn = {0916-8516}, journaltitle = {IEICE Transactions on Communications}, keywords = {Low-frequency stimulation; Frankenhaeuser-Huxley model; Nonlinear Response; On-Off keying modulation}, peerreviewed = {Yes}, shortjournal = {IEICE T COMMUN}, title = {A Study on Nonlinear Effect of Low-Frequency Modulated Radio Signals on Stimulus Response}, type = {Article in Journal}, }
  • M. Chen, D. Anzai, J. Wang, and G. Fischer, "Circuit Design for Common-mode Noise Rejection in Biosignal Acquisition based on Imbalance Cancellation of Electrode Contact Resistance" in EMC Sapporo & APEMC 2019, Sapporo, Hokkaido, Japan, 2019. [Bibtex]
    @inproceedings{chen2019,
    author = {Chen, Minghui and Anzai, Daisuke and Wang, Jianqing and Fischer, Georg},
    editor = {http://www.ieice.org/ emc2019/venue.html},
    language = {English},
    booktitle = {EMC Sapporo & APEMC 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/211977886},
    year = {2019},
    month = {06},
    day = {03},
    eventdate = {2019-06-03/2019-06-07},
    faupublication = {yes},
    keywords = {ECG,electrode,contact impedance},
    peerreviewed = {Yes},
    title = {Circuit Design for Common-mode Noise Rejection in Biosignal Acquisition based on Imbalance Cancellation of Electrode Contact Resistance},
    type = {Konferenzschrift},
    venue = {Sapporo, Hokkaido, Japan},
    }
  • H. Unterweger, J. Kirchner, W. Wicke, A. Ahmadzadeh, D. Ahmed, V. Jamali Kooshkghazi, C. Alexiou, G. Fischer, R. Weigel, and R. Schober, "Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow" in 19th IEEE International Workshop on Signal Processing Advances in Wireless Communications, Kalamata, Greece, 2019. [Bibtex]
    @inproceedings{unterweger2018,
    abstract = {Simple and easy to implement testbeds are needed to further advance molecular communication research. To this end, this paper presents an in-vessel molecular communication testbed using magnetic nanoparticles dispersed in an aqueous suspension as they are also used for drug targeting in biotechnology. The transmitter is realized by an electronic pump for injection via a Yconnector. A second pump provides a background flow for signal propagation. For signal reception, we employ a susceptometer, an electronic device including a coil, where the magnetic particles move through and generate an electrical signal. We present experimental results for the transmission of a binary sequence and the system response following a single injection. For this flowdriven particle transport, we propose a simple parameterized mathematical model for evaluating the system response. 
    }, author = {Unterweger, Harald and Kirchner, Jens and Wicke, Wayan and Ahmadzadeh, Arman and Ahmed, Doaa and Jamali Kooshkghazi, Vahid and Alexiou, Christoph and Fischer, Georg and Weigel, Robert and Schober, Robert}, language = {English}, booktitle = {19th IEEE International Workshop on Signal Processing Advances in Wireless Communications}, cris = {https://cris.fau.de/converis/publicweb/publication/203248614}, year = {2019}, month = {06}, day = {25}, eventdate = {2018-06-25/2018-06-28}, faupublication = {yes}, keywords = {Molecular communication; magnetic nanoparticles}, peerreviewed = {Yes}, title = {Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow}, type = {Konferenzschrift}, venue = {Kalamata, Greece}, }
  • T. Reißland, F. Lurz, R. Weigel, and A. Koelpin, "Compressed sensing based near-field radar target imaging and localization employing normalized iterative hard thresholding" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Orlando, FL, USA, 2019. [DOI] [Bibtex]
    @inproceedings{reissland2019,
    abstract = {
    The paper presents an approach for target position recovery from frequency modulated continuous wave (FMCW) radar data. The presented algorithm is, in contrast to many established techniques, able to use snapshots taken from arbitrary positions. The presented technique can be applied to imaging as well as localization applications. The basis of the approach is a compressed sensing based algorithm called normalized iterative hard thresholding (NIHT). To prove its capabilities it is evaluated by simulation over a wide range of signal bandwidths and base frequencies.
    }, author = {Reißland, Torsten and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)}, cris = {https://cris.fau.de/converis/publicweb/publication/204083974}, year = {2019}, month = {05}, day = {13}, doi = {10.1109/WISNET.2019.8711811}, eventdate = {2019-01-20/2019-01-23}, faupublication = {yes}, isbn = {9781538659533}, issn = {2473-4624}, keywords = {radar; compressed sensing; imaging; localization; niht}, peerreviewed = {Yes}, title = {Compressed sensing based near-field radar target imaging and localization employing normalized iterative hard thresholding}, type = {Konferenzschrift}, venue = {Orlando, FL, USA}, }
  • F. Michler, K. Shi, S. Schellenberger, T. Steigleder, A. Malessa, L. Hameyer, N. Neumann, F. Lurz, C. Ostgathe, R. Weigel, and A. Koelpin, "A Clinically Evaluated Interferometric Continuous-Wave Radar System for the Contactless Measurement of Human Vital Parameters", Sensors, vol. 19, iss. 11, 2019. [DOI] [Bibtex]
    @article{michler2019c,
    abstract = {
    Vital parameters are key indicators for the assessment of health. Conventional methods rely on direct contact with the patients’ skin and can hence cause discomfort and reduce autonomy. This article presents a bistatic 24 GHz radar system based on an interferometric six-port architecture and features a precision of 1 µm in distance measurements. Placed at a distance of 40 cm in front of the human chest, it detects vibrations containing respiratory movements, pulse waves and heart sounds. For the extraction of the respiration rate, time-domain approaches like autocorrelation, peaksearch and zero crossing rate are compared to the Fourier transform, while template matching and a hidden semi-Markov model are utilized for the detection of the heart rate from sphygmograms and heart sounds. A medical study with 30 healthy volunteers was conducted to collect 5.5 h of data, where impedance cardiogram and electrocardiogram were used as gold standard for synchronously recording respiration and heart rate, respectively. A low root mean square error for the breathing rate (0.828 BrPM) and a high overall F1 score for heartbeat detection (93.14%) could be achieved using the proposed radar system and signal processing.

    },
    author = {Michler, Fabian and Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Malessa, Anke and Hameyer, Laura and Neumann, Nina and Lurz, Fabian and Ostgathe, Christoph and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/216337023},
    year = {2019},
    month = {05},
    day = {31},
    doi = {10.3390/S19112492},
    faupublication = {yes},
    issn = {1424-8220},
    journaltitle = {Sensors},
    number = {11},
    peerreviewed = {Yes},
    shortjournal = {SENSORS-BASEL},
    title = {A Clinically Evaluated Interferometric Continuous-Wave Radar System for the Contactless Measurement of Human Vital Parameters},
    type = {online publication},
    url = {https://www.mdpi.com/1424-8220/19/11/2492},
    volume = {19},
    }

  • E. Aguilar, V. Issakov, and R. Weigel, "Highly-Integrated <0.14 mm2D-Band Receiver Front-Ends for Radar and Imaging Applications in a 130 nm SiGe BiCMOS Technology" in 2019 IEEE 19th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2019, Orlando, FL, USA, 2019. [DOI] [Bibtex]
    @inproceedings{aguilar2019,
    abstract = {Two low-power D-band receiver front-ends with competitive performance for radar and imaging applications are presented. The receivers include passive and active singleended-to-differential converters realized as an ultra-compact Marchand-based balun and as a differential-pair-based active balun, respectively. The receivers achieve measured conversion gains (CG) of 24.9dB at 134GHz (active balun) and 20.27dB at 124GHz (passive balun) while consuming 425mW and 330mW correspondingly. A wide bandwidth of 32GHz is achieved for the active variant in the 114-146GHz frequency range while the passive approach achieves a CG > 10dB in the 112-147GHz frequency range. The passive approach achieves a peak conversion gain of 20.27dB at 126GHz. The presented results offer competitive performance and compare favorably to reported receiver front-ends in terms of ultra-small silicon area (0.14 and 0.1mm 2 ). The front-ends are suitable for integration in highly-integrated D-Band radar receiver arrays as well as for high-density imaging arrays.},
    author = {Aguilar, Erick and Issakov, Vadim and Weigel, Robert},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {2019 IEEE 19th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/219407077},
    year = {2019},
    month = {05},
    day = {07},
    doi = {10.1109/SIRF.2019.8709129},
    eventdate = {2019-01-20/2019-01-23},
    eventtitle = {19th IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, SiRF 2019},
    faupublication = {yes},
    isbn = {9781538659502},
    keywords = {active balun; D-band; imaging; passive balun; radar; SiGe; wideband receiver},
    peerreviewed = {unknown},
    title = {Highly-Integrated <0.14 mm2D-Band Receiver Front-Ends for Radar and Imaging Applications in a 130 nm SiGe BiCMOS Technology},
    venue = {Orlando, FL, USA},
    }
  • B. Gäde, M. Amon, A. Bereyhi, G. Fischer, and R. Müller, "Outphasing Elements for Hybrid Analogue Digital Beamforming and Single-RF MIMO" in 2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), Brighton, UK, 2019. [Bibtex]
    @inproceedings{gaede2019,
    abstract = {In conventional Multiple-Input Multiple Output (MIMO) systems, each antenna requires its own Radio Frequency (RF) chain. Since each RF-chain includes several active components that have to be synchronised, costs and complexity become restrictive. The outphasing MIMO and the outphasing precoder architectures are possible approaches to mitigate this problem. The core of both architectures are Outphasing Elements (OEs), which are used to form a electronically controllable, passive antenna feed network. In this paper, these OEs are analysed with respect to component tolerances. The feasibility of the outphasing concept is demonstrated by the implementation of a hardware prototype OE. The performance of this prototype is measured and compared to theoretical predictions with good agreement.},
    author = {Gäde, Bernhard and Amon, Michael and Bereyhi, Ali and Fischer, Georg and Müller, Ralf},
    language = {English},
    booktitle = {2019 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP)},
    cris = {https://cris.fau.de/converis/publicweb/publication/217858356},
    year = {2019},
    month = {05},
    day = {14},
    eventdate = {2019-05-14/2019-05-18},
    faupublication = {yes},
    keywords = {outphasing,MIMO,hybrid analog digital precoding,beamforming,sensitivity},
    peerreviewed = {unknown},
    title = {Outphasing Elements for Hybrid Analogue Digital Beamforming and Single-RF MIMO},
    type = {Journal Article},
    venue = {Brighton, UK},
    }
  • M. Gardill, J. Schwendner, and J. Fuchs, "In-Situ Time-Frequency Analysis of the 77 GHz Bands using a Commercial Chirp-Sequence Automotive FMCW Radar Sensor" in 2019 IEEE MTT-S International Microwave Symposium (IMS), Boston, MA, USA, 2019, pp. 544-547. [Bibtex]
    @inproceedings{gardill2019,
    abstract = {A commercial chirp-sequence automotive radar sensor is reconfigured to allow for time-frequency analysis of the 77GHz automotive radar bands. Compared to highend measurement equipment such as real-time spectrum analyzers, due to its low cost and compact size the proposed approach allows for in-situ interception and time-frequency analysis of traffic scenarios, e.g. by mounting the sensor in a test vehicle exactly at the positions where the radar sensors would be mounted. The theory behind the modification is discussed and compared with measurements. Time-frequency spectra of a rural road driving scenario obtained with the proposed system are shown to illustrate the practical relevance and usefulness of the approach.},
    author = {Gardill, Markus and Schwendner, Johannes and Fuchs, Jonas},
    language = {English},
    booktitle = {2019 IEEE MTT-S International Microwave Symposium (IMS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/210771629},
    year = {2019},
    month = {05},
    day = {07},
    eventdate = {2019-06-02/2019-02-07},
    faupublication = {yes},
    keywords = {radar; automotive; FMCW; chirp-sequence; time-frequency analysis},
    pages = {544--547},
    peerreviewed = {unknown},
    title = {In-Situ Time-Frequency Analysis of the 77 GHz Bands using a Commercial Chirp-Sequence Automotive FMCW Radar Sensor},
    type = {Konferenzschrift},
    url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8700983&isnumber=8700641},
    venue = {Boston, MA, USA},
    }
  • J. Lichtblau, F. Michler, B. Scheiner, F. Lurz, M. Gräbner, M. Hundhausen, R. Weigel, and A. Koelpin, "Phased Array Approach for Vehicle-to-Infrastructure Communication in Train Stations" in 2019 IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019. [DOI] [Bibtex]
    @inproceedings{lichtblau2019a,
    author = {Lichtblau, Johann and Michler, Fabian and Scheiner, Benedict and Lurz, Fabian and Gräbner, Martin and Hundhausen, Mira and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    language = {English},
    booktitle = {2019 IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/208515022},
    year = {2019},
    month = {05},
    day = {16},
    doi = {10.1109/RWS.2019.8714281},
    eventdate = {2019-01-20/2019-01-23},
    eventtitle = {IEEE Radio and Wireless Symposium (RWS)},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Phased Array Approach for Vehicle-to-Infrastructure Communication in Train Stations},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • J. Lichtblau, F. Lurz, R. Weigel, and A. Koelpin, "Measurements for Onboard Communication in a High-Speed Train up to 330 km/h for Selected Scenarios at 2.45 GHz" in 2019 IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019. [DOI] [Bibtex]
    @inproceedings{lichtblau2019,
    author = {Lichtblau, Johann and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    language = {English},
    booktitle = {2019 IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/204202476},
    year = {2019},
    month = {05},
    day = {16},
    doi = {10.1109/RWS.2019.8714281},
    eventdate = {2019-01-20/2019-01-23},
    eventtitle = {2019 IEEE Radio and Wireless Symposium (RWS)},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Measurements for Onboard Communication in a High-Speed Train up to 330 km/h for Selected Scenarios at 2.45 GHz},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • M. Frank, F. Lurz, R. Weigel, and A. Koelpin, "122 GHz Low-cost Substrate Integrated Waveguide based Leaky-Wave Antenna Design" in 2019 IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{frank2019,
    author = {Frank, Martin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {2019 IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/204103705},
    year = {2019},
    month = {05},
    day = {16},
    doi = {10.1109/RWS.2019.8714239},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    isbn = {9781538659441},
    issn = {2164-2974},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {122 GHz Low-cost Substrate Integrated Waveguide based Leaky-Wave Antenna Design},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • V. Jamali, A. M. Tulino, G. Fischer, R. Muller, and R. Schober, "Scalable and Energy-Efficient Millimeter Massive MIMO Architectures: Reflect-Array and Transmit-Array Antennas" in ICC 2019 - 2019 IEEE International Conference on Communications (ICC), Shanghai, China, 2019. [DOI] [Bibtex]
    @inproceedings{jamali2019,
    abstract = {Hybrid analog-digital architectures are considered as promising candidates for implementing millimeter wave (mmWave) massive multiple-input multiple-output (MIMO) systems since they enable a considerable reduction of the required number of costly radio frequency (RF) chains by moving some of the signal processing operations into the analog domain. However, the analog feed network, comprising RF dividers, combiners, phase shifters, and line connections, of hybrid MIMO architectures is not scalable due to its prohibitively high power consumption for large numbers of transmit antennas. Motivated by this limitation, in this paper, we study novel massive MIMO architectures, namely reflect-array (RA) and transmit-array (TA) antennas. We show that the precoders for RA and TA antennas have to meet different constraints compared to those for conventional MIMO architectures. Taking these constraints into account and exploiting the sparsity of mmWave channels, we design an efficient precoder for RA and TA antennas based on the orthogonal matching pursuit algorithm. Furthermore, in order to fairly compare the performance of RA and TA antennas with conventional fully-digital and hybrid MIMO architectures, we develop a unified power consumption model. Our simulation results show that unlike conventional MIMO architectures, RA and TA antennas are highly energy efficient and fully scalable in terms of the number of transmit antennas.
    }, author = {Jamali, Vahid and Tulino, Antonia M. and Fischer, Georg and Muller, Ralf and Schober, Robert}, editor = {IEEE}, language = {English}, booktitle = {ICC 2019 - 2019 IEEE International Conference on Communications (ICC)}, cris = {https://cris.fau.de/converis/publicweb/publication/223174333}, year = {2019}, month = {05}, day = {20}, doi = {10.1109/ICC.2019.8761603}, eventdate = {2019-05-20/2019-05-24}, faupublication = {yes}, isbn = {9781538680889}, issn = {1938-1883}, keywords = {Vehicular ad hoc networks; Taxonomy; Vehicle-to-infrastructure; Databases; Real-time systems}, peerreviewed = {Yes}, title = {Scalable and Energy-Efficient Millimeter Massive MIMO Architectures: Reflect-Array and Transmit-Array Antennas}, venue = {Shanghai, China}, }
  • M. Frank, M. Völkel, T. Reißland, A. Koelpin, R. Weigel, P. Ghesquiere, F. Lambrecht, S. Kiefl, M. Lasch, V. Sieber, T. Lenhard, and P. Wolz, "Vernetzte Umfeldsensorik mit adaptiven Radiointerferometern zur Distanzmessung mit Sechstortechnik : BMBF Verbundprojekt NetGuard6P : Gemeinsamer Abschlussbericht", pp. 1-145, 2019. [DOI] [Bibtex]
    @other{frank2019c,
    author = {Frank, Martin and Völkel, Matthias and Reißland, Torsten and Koelpin, Alexander and Weigel, Robert and Ghesquiere, Pol and Lambrecht, Franziska and Kiefl, Stefan and Lasch, Markus and Sieber, Volker and Lenhard, Thilo and Wolz, Patrick},
    language = {German},
    cris = {https://cris.fau.de/converis/publicweb/publication/212056607},
    year = {2019},
    month = {05},
    doi = {10.2314/KXP:1665974389},
    faupublication = {yes},
    pages = {1--145},
    peerreviewed = {automatic},
    title = {Vernetzte Umfeldsensorik mit adaptiven Radiointerferometern zur Distanzmessung mit Sechstortechnik : BMBF Verbundprojekt NetGuard6P : Gemeinsamer Abschlussbericht},
    type = {anderer},
    url = {https://www.tib.eu/de/suchen/id/TIBKAT:1047778009/Vernetzte-Umfeldsensorik-mit-adaptiven-Radiointerferometern/},
    }
  • M. Wagner, T. Gossmann, J. Tomasik, R. Weigel, and A. Hagelauer, "Simulations of a New Design Concept for Hybrid Ladder Filters" in 2019 IEEE 20th Wireless and Microwave Technology Conference, WAMICON 2019, Cocoa Beach, FL, USA, 2019. [DOI] [Bibtex]
    @inproceedings{wagner2019,
    abstract = {In this paper, a new concept from circuit design perspective is presented and evaluated based on simulations. The concept allows for manipulation of the fixed behavior and limited effective electromechanical coupling factor (k-{\text{eff}}^2) of acoustic-wave resonators by additional lumped-element resonators. This hybrid approach enables resonance spreading of single acoustic-wave resonators and can be used for wide-band filter designs. A theoretical description of the concept is given and its benefits and application to filter design are outlined. Important characteristics are illustrated by a design example.},
    author = {Wagner, Michael and Gossmann, Timo and Tomasik, Jakob and Weigel, Robert and Hagelauer, Amelie},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {2019 IEEE 20th Wireless and Microwave Technology Conference, WAMICON 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/223995014},
    year = {2019},
    month = {04},
    day = {01},
    doi = {10.1109/WAMICON.2019.8765444},
    eventdate = {2019-04-08/2019-04-09},
    eventtitle = {20th IEEE Wireless and Microwave Technology Conference, WAMICON 2019},
    faupublication = {yes},
    isbn = {9781538695975},
    peerreviewed = {unknown},
    title = {Simulations of a New Design Concept for Hybrid Ladder Filters},
    venue = {Cocoa Beach, FL, USA},
    }
  • A. Ali and G. Fischer, "Symbol Based Statistical RF Fingerprinting for Fake Base Station Identification" in 29th International Conference Radioelektronika 2019, Microwave and Radio Electronics Week (MAREW), Pardubice, Czech Republic, Czech Republic, 2019 (to be published). [Bibtex]
    @inproceedings{ali2019a,
    abstract = {The identification of fake base station (FBS) in a cellular network has become challenging with the development of various software defined radio platforms and mobile standards. This paper, therefore, presents robust statistical approach to detect unique non-linearities based hardware impairments of the transmitter. Employing the fact that power amplifier (PA) of a regular base station (RBS) is a costly and high precision device with a provision of sophisticated digital predistortion (DPD) hardware implementation and in contrary, this DPD based linearization effort is not spent in existing SDR platforms so PA of an SDR based FBS tends to violate the spectral mask and introduces large amplitude and phase errors in the transmitted signal compared to the RBS. At first, a second order symbolbased error vector magnitude (EVM) approach is triggered at the user equipment (UE) to measure the non-linearity induced by the PA of various SDR based FBS. Afterward, a higher fourth order moment i.e. kurtosis approach has been proposed along with the actual measurement results to determine the noise structuredness of the received signal at UE. The kurtosis on magnitude of extracted complex noise cloud is found to be a strong indicator to identify the FBS.
    }, author = {Ali, Arslan and Fischer, Georg}, language = {English}, booktitle = {29th International Conference Radioelektronika 2019, Microwave and Radio Electronics Week (MAREW)}, cris = {https://cris.fau.de/converis/publicweb/publication/214073958}, year = {2019}, month = {04}, day = {16}, eventdate = {2019-04-16/2019-04-18}, faupublication = {yes}, keywords = {higher order moments; error vector statistics; kurtosis; RF fingerprinting; fake base station; software defined radio; hardware impairments; physical layer security}, note = {unpublished}, peerreviewed = {automatic}, title = {Symbol Based Statistical RF Fingerprinting for Fake Base Station Identification}, venue = {Pardubice, Czech Republic, Czech Republic}, }
  • A. Ali and G. Fischer, "The Phase Noise and Clock Synchronous Carrier Frequency Offset based RF Fingerprinting for the Fake Base Station Detection" in WAMICON 2019, Cocoa Beach, Florida, USA, USA, 2019. [DOI] [Bibtex]
    @inproceedings{ali2019b,
    abstract = {This paper presents very promising radio frequency (RF) fingerprinting techniques for the terminal-based detection of fake base station (FBS) in a wireless cellular network. The proposed schemes are based on identifying the analog hardware impairments of the transmitter. In this regard, phase noise analysis and its measured signatures reveal that low to medium end software defined radio (SDR) acting as FBS can certainly be detected if the detecting terminal’s own phase noise is at least 10- dB better than the transmitter. However, for medium to high end FBS, a computationally efficient network synchronized carrier frequency offset (CFO) approach has been proposed and the measurement results confirm that the regular base stations (RBS) that are clock synchronized show identical CFO values whereas, the FBS show large and random offset values. Furthermore, the CFO stability (Frequency offset vs. time) signatures illustrate that an FBS running by its own lazy clock show a large instability in the frequency offset values and even in case of a precision clock, fluctuations vanish though the stabilized offset is still large enough for a user terminal to distinguish the FBS from the RBS.
    }, author = {Ali, Arslan and Fischer, Georg}, language = {English}, publisher = {Institute of Electrical and Electronics Engineers Inc.}, booktitle = {WAMICON 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/215856634}, year = {2019}, month = {04}, day = {01}, doi = {10.1109/WAMICON.2019.8765471}, eventdate = {2019-04-08/2019-04-09}, eventtitle = {20th IEEE Wireless and Microwave Technology Conference (WAMICON) - IEEE WAMICON}, faupublication = {yes}, isbn = {9781538695975}, keywords = {phase noise; carrier frequency offset; RF Fingerprinting; fake base station; software defined radio; carrier frequency stability; hardware impairments; physical layer security}, peerreviewed = {unknown}, title = {The Phase Noise and Clock Synchronous Carrier Frequency Offset based RF Fingerprinting for the Fake Base Station Detection}, venue = {Cocoa Beach, Florida, USA, USA}, }
  • A. Ali and G. Fischer, "Symbol based statistical RF fingerprinting for fake base station identification" in 2019 29th International Conference Radioelektronika, RADIOELEKTRONIKA 2019 - Microwave and Radio Electronics Week, MAREW 2019, Pardubice, Czech Republic, 2019. [DOI] [Bibtex]
    @inproceedings{ali2019d,
    abstract = {The identification of fake base station (FBS) in a cellular network has become challenging with the development of various software defined radio platforms and mobile standards. This paper, therefore, presents robust statistical approach to detect unique non-linearities based hardware impairments of the transmitter. Employing the fact that power amplifier (PA) of a regular base station (RBS) is a costly and high precision device with a provision of sophisticated digital predistortion (DPD) hardware implementation and in contrary, this DPD based linearization effort is not spent in existing SDR platforms so PA of an SDR based FBS tends to violate the spectral mask and introduces large amplitude and phase errors in the transmitted signal compared to the RBS. At first, a second order symbol-based error vector magnitude (EVM) approach is triggered at the user equipment (UE) to measure the non-linearity induced by the PA of various SDR based FBS. Afterward, a higher fourth order moment i.e. kurtosis approach has been proposed along with the actual measurement results to determine the noise structuredness of the received signal at UE. The kurtosis on magnitude of extracted complex noise cloud is found to be a strong indicator to identify the FBS.},
    author = {Ali, Arslan and Fischer, Georg},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {2019 29th International Conference Radioelektronika, RADIOELEKTRONIKA 2019 - Microwave and Radio Electronics Week, MAREW 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/222399531},
    year = {2019},
    month = {04},
    day = {01},
    doi = {10.1109/RADIOELEK.2019.8733585},
    eventdate = {2019-04-16/2019-04-18},
    eventtitle = {29th International Conference Radioelektronika, RADIOELEKTRONIKA 2019},
    faupublication = {yes},
    isbn = {9781538693223},
    keywords = {Error vector statistics; Fake base station; Hardware impairments; Higher order moments; Kurtosis; Physical layer security; RF fingerprinting; Software defined radio},
    peerreviewed = {unknown},
    title = {Symbol based statistical RF fingerprinting for fake base station identification},
    venue = {Pardubice, Czech Republic},
    }
  • S. N. Easwaran, S. Camdzic, and R. Weigel, "Portable and Scalable High Voltage Circuits for Automotive Applications in BiCMOS Processes" in Proceedings of the Custom Integrated Circuits Conference, Austin, TX, USA, 2019. [DOI] [Bibtex]
    @inproceedings{easwaran2019,
    author = {Easwaran, Sri Navaneeth and Camdzic, Samir and Weigel, Robert},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {Proceedings of the Custom Integrated Circuits Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/224749210},
    year = {2019},
    month = {04},
    day = {01},
    doi = {10.1109/CICC.2019.8780318},
    eventdate = {2019-04-14/2019-04-17},
    eventtitle = {40th Annual IEEE Custom Integrated Circuits Conference, CICC 2019},
    faupublication = {yes},
    isbn = {9781538693957},
    issn = {0886-5930},
    journaltitle = {Proceedings of the Custom Integrated Circuits Conference},
    peerreviewed = {unknown},
    title = {Portable and Scalable High Voltage Circuits for Automotive Applications in BiCMOS Processes},
    venue = {Austin, TX, USA},
    volume = {2019-April},
    }
  • M. Frank, F. Lurz, R. Weigel, and A. Koelpin, "Low-cost Transmitarray Antenna Designs with +/-70° Beam Steering Range in V-Band" in 2019 12th German Microwave Conference (GeMiC), Stuttgart, Germany, 2019. [DOI] [Bibtex]
    @inproceedings{frank2019a,
    author = {Frank, Martin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2019 12th German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/208937734},
    year = {2019},
    month = {04},
    day = {25},
    doi = {10.23919/GEMIC.2019.8698118},
    eventdate = {2019-03-25/2019-03-27},
    faupublication = {yes},
    issn = {2167-8022},
    peerreviewed = {Yes},
    title = {Low-cost Transmitarray Antenna Designs with +/-70° Beam Steering Range in V-Band},
    type = {Konferenzschrift},
    venue = {Stuttgart, Germany},
    }
  • M. Schäfer, W. Wicke, L. Grebenstein, C. Strobl, R. Stavracakis Peixoto, J. Kirchner, A. Burkovski, G. Fischer, R. Weigel, R. Rabenstein, and R. Schober, "Modeling an Experimental Biological Modulator for Molecular Communications by Electrical Circuits" in 4th Workshop on Molecular Communications, Linz, Austria, 2019. [Bibtex]
    @inproceedings{schaefer2019,
    abstract = {Experimental systems are necessary to validate and improve theoretical molecular communication models. We propose an analytical model for a biological modulator based on genetically modified Escherichia coli (E. coli) bacteria which convert an electrically-controlled light signal into a chemical response. Techniques from system identification and electrical networks synthesis are used to model the complex biological system. Compared to a simple reference model, a better fit to the observed dynamics in the experimental data is obtained.},
    author = {Schäfer, Maximilian and Wicke, Wayan and Grebenstein, Laura and Strobl, Christian and Stavracakis Peixoto, Renata and Kirchner, Jens and Burkovski, Andreas and Fischer, Georg and Weigel, Robert and Rabenstein, Rudolf and Schober, Robert},
    language = {English},
    booktitle = {4th Workshop on Molecular Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/214344914},
    year = {2019},
    month = {04},
    day = {16},
    eventdate = {2019-04-16/2019-04-18},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Modeling an Experimental Biological Modulator for Molecular Communications by Electrical Circuits},
    type = {Abstract zum Vortrag},
    venue = {Linz, Austria},
    }
  • R. Weiss, A. Itzke, J. Reitenspiess, I. Hoffmann, and R. Weigel, "A Novel Closed Loop Current Sensor Based on a Circular Array of Magnetic Field Sensors", IEEE Sensors Journal, vol. 19, iss. 7, pp. 2517-2524, 2019. [DOI] [Bibtex]
    @article{weiss2019,
    abstract = {During the last years, coreless current sensors based on circular arrays of magnetic field sensors have been investigated. These sensors were limited in bandwidth and accuracy by the magnetic field sensors used to realize the circular arrays. Thus, this paper applied the well-known "closed loop" principle to circular array-based current sensors to overcome these limitations. This paper gives a comparison between circular arrays built from Hall and Fluxgate magnetic field sensors in both the closed loop and open loop operation. If closed loop configuration Fluxgate sensors are used, instead of Hall sensors, the measurement error can be reduced by a factor of two due to their intrinsic characteristics. Moreover, it is shown that the closed loop operation of the circular arrays results in a significant reduction of the temperature drift of the sensitivity for Fluxgate and Hall sensor-based circular arrays. If Hall sensors are used for the circular array, the reduction of the temperature drift of the sensitivity achieved by closed loop operation is about a factor of 10. If Fluxgate sensors are used, a significant reduction of the nonlinearities like hysteresis and a substantial reduction of the temperature drift of the sensitivity was observed.},
    author = {Weiss, Roland and Itzke, Alexander and Reitenspiess, Julian and Hoffmann, Ingolf and Weigel, Robert},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/213926689},
    year = {2019},
    month = {04},
    day = {01},
    doi = {10.1109/JSEN.2018.2887302},
    faupublication = {yes},
    issn = {1530-437X},
    journaltitle = {IEEE Sensors Journal},
    keywords = {Sensor arrays,core less current sensor,Hall-effect sensors,Fluxgate sensors,current sensing,contactless current measurement,closed loop,open loop,Amperes law},
    number = {7},
    pages = {2517--2524},
    peerreviewed = {Yes},
    shortjournal = {IEEE SENS J},
    title = {A Novel Closed Loop Current Sensor Based on a Circular Array of Magnetic Field Sensors},
    url = {https://ieeexplore.ieee.org/document/8581469},
    volume = {19},
    }
  • J. Rimmelspacher, R. Weigel, A. Hagelauer, and V. Issakov, "LC Tank Differential Inductor-Coupled Dual-Core 60 GHz Push-Push VCO in 45 nm RF-SOI CMOS Technology" in Radio & Wireless Week (RWW): Silicon Monolithic Inegrated Circuits in RF Systems (SiRF), Orlando, FL, USA, 2019. [Bibtex]
    @inproceedings{rimmelspacher2019,
    abstract = {This paper presents a 60 GHz dual-core push-push VCO in a 45 nm partially depleted (PD) RF Silicon-on-Insulator (SOI) CMOS technology. The cores are coupled inductively via differential inductors. The best measured phase noise at 1 MHz offset from a 63 GHz carrier is −94.4 dBc/Hz. The wideband continuous frequency-tuning-range (FTR) is 16 %. The DC power dissipation is 76 mW including fundamental 30 GHz and second harmonic (H2) 60 GHz output buffers at 1 V power supply voltage. The measurement results of a reference single-core VCO design proves the relative phase noise improvement of the implemented core-coupling technique. The chip area excluding pads is 0.09 mm2.
    }, author = {Rimmelspacher, Johannes and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim}, language = {English}, booktitle = {Radio & Wireless Week (RWW): Silicon Monolithic Inegrated Circuits in RF Systems (SiRF)}, cris = {https://cris.fau.de/converis/publicweb/publication/203768203}, year = {2019}, month = {04}, day = {20}, eventdate = {2019-01-20/2019-01-23}, faupublication = {yes}, keywords = {millimeter-wave VCO,wideband,silicon-on-insulator,CMOS technology,System-on-Chip}, peerreviewed = {unknown}, title = {LC Tank Differential Inductor-Coupled Dual-Core 60 GHz Push-Push VCO in 45 nm RF-SOI CMOS Technology}, type = {Konferenzschrift}, venue = {Orlando, FL, USA}, }
  • F. Irnstorfer and G. Fischer, "CEPT FM51(19)93, Advanced Receiver Design for Cancelation of DME Interference into PMSE" in ECC CEPT FM51, Erlangen, FAU, Germany, 2019. [Bibtex]
    @inproceedings{irnstorfer2019,
    author = {Irnstorfer, Florian and Fischer, Georg},
    editor = {ECO},
    booktitle = {ECC CEPT FM51},
    cris = {https://cris.fau.de/converis/publicweb/publication/221172763},
    year = {2019},
    month = {04},
    day = {24},
    eventdate = {2019-04-24/2019-04-25},
    faupublication = {yes},
    peerreviewed = {No},
    title = {CEPT FM51(19)93, Advanced Receiver Design for Cancelation of DME Interference into PMSE},
    type = {Konferenzschrift},
    url = {https://www.cept.org/Documents/fm-51/50882/fm51-19-info-93_advanced-receiver-design-for-cancelation-of-dme-interference-into-pmse},
    venue = {Erlangen, FAU, Germany},
    }
  • D. Popp and G. Fischer, "High Power and High Bandwidth Digital Three-Way Doherty Power Amplifier" in WAMICON 2019, Florida, 2019, pp. 1-6. [Bibtex]
    @inproceedings{popp2019,
    abstract = {This paper introduces an enhanced combiner architecture for high power and high bandwidth Three-Way Doherty Power Amplifier. The combiner is mathematical analyzed and two antithetic digital driven Doherty amplifiers are designed. The first one aims for high Back-off efficiency across the target bandwidth while the second one was designed for direct load matching. Both Doherty amplifiers feature a peak power of 61 dBm. The challenges for designing amplifiers with such high peak power are the absorption of the large transistor parasitics and matching the low impedance environment to the load. The proposed combiner architecture features transformer offset lines at all amplifier cores allowing the cancellation of parasitics as well as optimization for broadband performance. 

    The first Doherty amplifier uses a broadband multi-step transformer for load matching and features high Back-off efficiency across the target bandwidth. It achieves a fractional bandwidth of 36.4% and a peak output power of 61 dBm with a power ripple less than 1 dB. The combiner of the second Doherty amplifier transforms the low impedance environment to the desired load termination. It is able to meet the design goals across the frequency band and even covers a broad region outside the band. It has a fractional bandwidth of 43.5% and a peak output power of 61 dBm with a power ripple less than 1 dB. Both Doherty amplifiers are using 500W GaN HEMT transistors from Wolfspeed. The designs and simulations are done with the corresponding Wolfspeed non-linear model. }, author = {Popp, Daniel and Fischer, Georg}, language = {English}, booktitle = {WAMICON 2019}, cris = {https://cris.fau.de/converis/publicweb/publication/217308338}, year = {2019}, month = {04}, day = {08}, eventdate = {2019-04-08/2019-05-09}, faupublication = {yes}, keywords = {Doherty; Broadband; Wideband; High Power; Three Way; DPA; Enhanced Architecture;}, pages = {1--6}, peerreviewed = {Yes}, title = {High Power and High Bandwidth Digital Three-Way Doherty Power Amplifier}, type = {Konferenzschrift}, venue = {Florida}, }

  • J. Rimmelspacher, A. Werthof, R. Weigel, A. Geiselbrechtinger, and V. Issakov, "Experimental Considerations on Accurate fT and fmax Extraction for MOS Transistors Measured up to 110 GHz" in Automated RF Techniques Group (ARFTG) Microwave Measurement Symposium, Orlando, FL, USA, 2019. [Bibtex]
    @inproceedings{rimmelspacher2019a,
    author = {Rimmelspacher, Johannes and Werthof, Andreas and Weigel, Robert and Geiselbrechtinger, Angelika and Issakov, Vadim},
    booktitle = {Automated RF Techniques Group (ARFTG) Microwave Measurement Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/209910998},
    year = {2019},
    month = {03},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Experimental Considerations on Accurate fT and fmax Extraction for MOS Transistors Measured up to 110 GHz},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • M. Frank, F. Lurz, R. Weigel, and A. Koelpin, "Electronically Reconfigurable 6 × 6 Element Transmitarray at K Band based on Unit-Cells with Continuous Phase Range", IEEE Antennas and Wireless Propagation Letters, vol. 18, iss. 4, pp. 796-800, 2019. [DOI] [Bibtex]
    @article{frank2019d,
    author = {Frank, Martin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/212062319},
    year = {2019},
    month = {03},
    day = {06},
    doi = {10.1109/LAWP.2019.2903338},
    faupublication = {yes},
    issn = {1536-1225},
    journaltitle = {IEEE Antennas and Wireless Propagation Letters},
    number = {4},
    pages = {796--800},
    peerreviewed = {Yes},
    shortjournal = {IEEE ANTENN WIREL PR},
    title = {Electronically Reconfigurable 6 × 6 Element Transmitarray at K Band based on Unit-Cells with Continuous Phase Range},
    type = {Letter},
    volume = {18},
    }
  • D. Ahmed, G. Fischer, and J. Kirchner, "Simulation-based Models of the Galvanic Coupling Intra-body Communication" in 2019 IEEE Sensors Applications Symposium, Sophia Antipolis, France, France, 2019. [Bibtex]
    @inproceedings{ahmed2019,
    abstract = {Human body communication (HBC) uses the human body as a transmission medium for electrical signal at very low power consumption. In this paper, we provided two simulationbased arm models. In the first model, we studied the effect of introducing different types and thicknesses of tissues in the path of signal transmission on the detected signal. In the second model, we introduced different bending angles to the model and examined its effect on the detected signal. The results showed that the signal attenuates very rapidly in the skin tissue, although it has the lowest conductivity. On the other hand, no signal decay is noticed in the fat tissue. Despite the highest attenuation constant of the muscle tissue, adding it the model improves the detected signal at receiver. Increasing the thickness of the muscle layer reduces the electric potential difference at transmitter, while improves the detected signal at receiver. For the bended model, we found that the bending helps to improve the received signal at small angles because the signal takes the shortest path from transmitter to receiver. For larger angles, the discrepancy between this short path and main transmission length will be reduced until they are equal at angle 180°.
    }, author = {Ahmed, Doaa and Fischer, Georg and Kirchner, Jens}, language = {English}, booktitle = {2019 IEEE Sensors Applications Symposium}, cris = {https://cris.fau.de/converis/publicweb/publication/214826646}, year = {2019}, month = {03}, day = {11}, eventdate = {2019-03-11/2019-03-13}, faupublication = {yes}, keywords = {human body communication,intra-body communication,galvanic coupling,simulation}, peerreviewed = {unknown}, title = {Simulation-based Models of the Galvanic Coupling Intra-body Communication}, type = {Konferenzschrift}, venue = {Sophia Antipolis, France, France}, }
  • J. Nehring, G. Fischer, R. Weigel, and D. Kissinger, "An 8-32 GHz frequency synthesizer based on a wideband VCO array with bandwidth extension stage" in 8th German Microwave Conference, GeMiC 2014, Aachen, DEU, 2019. [Bibtex]
    @inproceedings{nehring2019,
    abstract = {This paper proposes a wideband signal source covering a bandwidth of two octaves from 8 GHz to 32 GHz. The system is based on an array of three wideband voltage controlled oscillators (VCOs) for octave wide frequency synthesis and a post-synthesis stage which extends the bandwidth by another octave. The circuits were fabricated in a 0.35 µm SiGe bipolar technology with an ft/fmax = 170/250 GHz. The VCO tuning ranges are 28.9 %, 26.2 % and 24.7 % respectively. The average output power was measured to be −3.5 dBm. The single-sideband phase noise at 1 MHz offset has an average value of −100 dBc/Hz over the entire bandwidth of two octaves. The system blocks VCO array, bandwidth extension and output buffer consume a power of 175 mW, 277 mW and 150 mW.},
    author = {Nehring, Johannes and Fischer, Georg and Weigel, R. and Kissinger, Dietmar},
    publisher = {VDE Verlag GmbH},
    booktitle = {8th German Microwave Conference, GeMiC 2014},
    cris = {https://cris.fau.de/converis/publicweb/publication/228162054},
    year = {2019},
    month = {03},
    day = {10},
    eventdate = {2014-03-10/2014-03-12},
    eventtitle = {8th German Microwave Conference, GeMiC 2014},
    faupublication = {yes},
    isbn = {9783800735853},
    keywords = {VCO; Voltage controlled oscillator; Wideband frequency synthesis},
    peerreviewed = {unknown},
    title = {An 8-32 GHz frequency synthesizer based on a wideband VCO array with bandwidth extension stage},
    venue = {Aachen, DEU},
    }
  • M. Völkel, S. Mann, M. Frank, R. Weigel, and A. Hagelauer, "A High Precision Reconfigureable Bistatic Interferometric Radar with Integrated Six-port Receiver at 60 GHz" in GeMiC, Stuttgart, Germany, 2019. [DOI] [Bibtex]
    @inproceedings{voelkel2019b,
    abstract = {In this paper a 60GHz bistatic reconfigureable sixport radar for high precision measuring is presented. The frontend is designed in a substrate-integrated waveguide technology including coupler, attenuator and transmission lines. The core of the front-end is a integrated six-port receiver MMIC including the passive six-port structure, a LNA and four detectors. It has been designed using a 0.13µm SiGe BiCMOS process. A BGT60, stabilized by a PLL-circuit, generates the transmit signal for vivaldi antennas. The system includes also a baseband circuit with adjustable differential amplifier, 24bit@52kSa/s ADC converter for signal sampling and DAC converter for gain and attenuation tuning. Furthermore, the stacked system is directly connected to a FPGA board. A full NIOS2 system is set up to control the radar and send the collected data via ethernet to the PC. C++ software is written to configure the system in an easy comfortable way and to visualize the measured data. Measurements show, that the radar works in a range up to five meter. The maximum distance deviation at 1m is 30µm and the standard deviation is 12.6µm.
    }, author = {Völkel, Matthias and Mann, Sebastian and Frank, Martin and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {GeMiC}, cris = {https://cris.fau.de/converis/publicweb/publication/208938538}, year = {2019}, month = {03}, day = {25}, doi = {10.23919/GEMIC.2019.8698190}, eventdate = {2019-03-25/2019-03-27}, faupublication = {yes}, keywords = {bistatic; FPGA; integrated receiver; interferometry; millimeter wave circuits; radar systems; six-port; substrateintegrated waveguide (SIW)}, peerreviewed = {unknown}, title = {A High Precision Reconfigureable Bistatic Interferometric Radar with Integrated Six-port Receiver at 60 GHz}, type = {Konferenzschrift}, venue = {Stuttgart, Germany}, }
  • C. Erhart, S. Lutz, M. A. Mutschlerl, P. A. Scharf, T. Walter, H. Mantz, and R. Weigel, "Compact polarimetry for automotive applications", International Journal of Microwave and Wireless Technologies, vol. 11, iss. 2, pp. 114-120, 2019. [DOI] [Bibtex]
    @article{erhart2019,
    abstract = {Though compact polarimetric approaches have been developed and applied in space and geo researching systems they have not been taken into consideration in automotive applications, yet. A sensor system has been designed to conduct polarimetric measurements in the 77 GHz frequency band, which is permitted for automotive usage. This system is able to transceive linearly as well as circularly polarized electromagnetic continuous waves. Depending on the case of application, the frequency output can be set statically or modulated over time within adjustable parameters. Hence, a variety of compact polarimetric modes can be performed and compared with full polarimetric approaches. Two compact polarimetric modes, dual-circular polarimetric mode, and circular-transmit-linear-receive, will be introduced and applied in this contribution. Their operability in this frequency range will be investigated after the microstrip antennas as well as the beam focusing dielectrical lense are characterized. Finally, results of a realistical measurement set-up will confirm the practicability of compact polarimetric approaches for double bounce recognition.},
    author = {Erhart, Christian and Lutz, Steffen and Mutschlerl, Marc A. and Scharf, Philipp A. and Walter, Thomas and Mantz, Hubert and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/215877754},
    year = {2019},
    month = {03},
    day = {01},
    doi = {10.1017/S1759078718001617},
    faupublication = {yes},
    issn = {1759-0787},
    journaltitle = {International Journal of Microwave and Wireless Technologies},
    number = {2},
    pages = {114--120},
    peerreviewed = {Yes},
    title = {Compact polarimetry for automotive applications},
    volume = {11},
    }
  • M. Kamper, D. Kondakov, and G. Fischer, "Optimized output baluns for current mode class D power amplifiers" in 8th German Microwave Conference, GeMiC 2014, Aachen, DEU, 2019. [Bibtex]
    @inproceedings{kamper2019,
    abstract = {Baluns optimized for Current Mode Class D (CMCD) amplifiers are presented. CMCD amplifiers employ a differential output and therefore require a low loss balun to drive single ended loads. Furthermore, impedance termination at harmonic frequencies needs to be controlled to maintain high efficiency operation. In this work planar balun types are compared with respect to insertion loss and harmonic impedance behavior. Afterwards an exponentially tapered balun is designed, demonstrating a very low loss of 0.2 dB at 860 MHz.},
    author = {Kamper, Michael and Kondakov, Dmitrii and Fischer, Georg},
    publisher = {VDE Verlag GmbH},
    booktitle = {8th German Microwave Conference, GeMiC 2014},
    cris = {https://cris.fau.de/converis/publicweb/publication/228165931},
    year = {2019},
    month = {03},
    day = {10},
    eventdate = {2014-03-10/2014-03-12},
    eventtitle = {8th German Microwave Conference, GeMiC 2014},
    faupublication = {yes},
    isbn = {9783800735853},
    peerreviewed = {unknown},
    title = {Optimized output baluns for current mode class D power amplifiers},
    venue = {Aachen, DEU},
    }
  • B. Cassens, M. Hartmann, T. Nowak, N. Duda, J. Thielecke, A. Koelpin, and R. Kapitza, "Bursting: Increasing Energy Efficiency of Erasure-Coded Data in Animal-Borne Sensor Networks" in ESWN 2019, Beijing, China, 2019. [Bibtex]
    @inproceedings{cassens2019,
    abstract = {Observing the (social) behavior of animals and especially bats contributes to improved epidemic forecasts and improved protection of rare or endangered species. For this task, animal-borne sensor nodes are powerful tools since they allow collecting more information at less influence to the species compared to traditional radio telemetry. However, as bats are inherently small vertebrates, a strict weight limit of 2 g is dictated for attached sensor nodes. To acquire enough data, the sensor nodes must achieve a runtime of at least two weeks, which demands a rigorous energy management. As the data transmission is the most energy hungry task, minimizing the energy demand in this segment is a key to achieve the desired runtimes. In this paper we present a novel technique that enables bursts of erasure coded data without sacrificing reliability (in a wildlife setting). To keep data losses at a minimum, our approach exploits the characteristics of the erasure channel and combines encoded packets in smart way. We evaluated this approach extensively with experiments, field tests and a theoretical analysis. The results show a decreased energy demand by 30.177 % to 36.951 % while the data rate is increased up to a factor of 4 at the same time.},
    author = {Cassens, Björn and Hartmann, Markus and Nowak, Thorsten and Duda, Niklas and Thielecke, Jörn and Koelpin, Alexander and Kapitza, Ruediger},
    language = {English},
    publisher = {Junction Publishing},
    booktitle = {ESWN 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/208990776},
    year = {2019},
    month = {02},
    day = {27},
    eventdate = {2019-02-25/2019-02-27},
    faupublication = {yes},
    peerreviewed = {Yes},
    series = {EWSN ?19 Proceedings of the 2019 International Conference on Embedded Wireless Systems and Networks},
    title = {Bursting: Increasing Energy Efficiency of Erasure-Coded Data in Animal-Borne Sensor Networks},
    type = {Konferenzschrift},
    venue = {Beijing, China},
    }
  • M. Frank, F. Lurz, R. Weigel, and A. Koelpin, "Compact Low-cost Substrate Integrated Waveguide Fed Antenna for 122 GHz Radar Applications", International Journal of Microwave and Wireless Technologies, vol. 11, iss. 4, pp. 1-5, 2019. [DOI] [Bibtex]
    @article{frank2019b,
    author = {Frank, Martin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {International Journal of Microwave and Wireless Technologies},
    cris = {https://cris.fau.de/converis/publicweb/publication/209234664},
    year = {2019},
    month = {02},
    day = {20},
    doi = {10.1017/S1759078719000072},
    faupublication = {yes},
    issn = {1759-0787},
    journaltitle = {International Journal of Microwave and Wireless Technologies},
    number = {4},
    pages = {1--5},
    peerreviewed = {Yes},
    title = {Compact Low-cost Substrate Integrated Waveguide Fed Antenna for 122 GHz Radar Applications},
    type = {Letter},
    volume = {11},
    }
  • D. Schuklin, J. Röber, M. Stadelmayer, T. Mai, R. Weigel, and A. Hagelauer, "Highly Integrated Low Power Photomultiplier Readout ASIC Comprising Fast ADC to Be Used in the Antarctic Ice" in 2019 IEEE 19th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF), Orlando, Florida, USA, 2019. [Bibtex]
    @inproceedings{schuklin2019,
    abstract = {After the successful launch of IceCube, the work is currently concentrated the next generation neutrino observatory at South Pole, IceCube Gen2. The neutrino detection and post processing accuracy mostly relies on used electronic hardware. The proposed highly integrated, low power photomultiplier readout ASIC is designed for function in low temperatures of Antarctic. The microchip comprises an input pre-amplifier, a clock generator and an ADC with encoder logic featuring sampling rate of 500MHz, 6bit output accuracy with a smart extension of input related resolution up to 8bit in the area of interest. It achieves the same accuracy like a standard 8bit ADC architecture but with significantly less hardware overhead and power dissipation.
    }, author = {Schuklin, Dennis and Röber, Jürgen and Stadelmayer, Markus and Mai, Timo and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {2019 IEEE 19th Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems (SiRF)}, cris = {https://cris.fau.de/converis/publicweb/publication/208580332}, year = {2019}, month = {02}, day = {20}, eventdate = {2019-01-20/2019-01-23}, faupublication = {yes}, peerreviewed = {unknown}, title = {Highly Integrated Low Power Photomultiplier Readout ASIC Comprising Fast ADC to Be Used in the Antarctic Ice}, type = {Konferenzschrift}, venue = {Orlando, Florida, USA}, }
  • S. Ripperger, L. Günther, H. Wieser, N. Duda, M. Hierold, B. Cassens, R. Kapitza, A. Koelpin, and F. Mayer, "Proximity sensors on common noctule bats reveal evidence that mothers guide juveniles to roosts but not food", Biology Letters, 2019. [DOI] [Bibtex]
    @article{ripperger2019a,
    author = {Ripperger, Simon and Günther, Linus and Wieser, Hanna and Duda, Niklas and Hierold, Martin and Cassens, Björn and Kapitza, Rüdiger and Koelpin, Alexander and Mayer, Frieder},
    cris = {https://cris.fau.de/converis/publicweb/publication/214825514},
    year = {2019},
    month = {02},
    day = {13},
    doi = {10.1098/RSBL.2018.0884},
    faupublication = {yes},
    issn = {1744-9561},
    journaltitle = {Biology Letters},
    peerreviewed = {Yes},
    shortjournal = {BIOL LETTERS},
    title = {Proximity sensors on common noctule bats reveal evidence that mothers guide juveniles to roosts but not food},
    type = {Letter},
    }
  • J. Fuchs, R. Weigel, and M. Gardill, "Model Order Estimation using a Multi-Layer Perceptron for Direction-of-Arrival Estimation in Automotive Radar Sensors" in 2019 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Orlando, Florida, USA, 2019, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{fuchs2019,
    abstract = {In this work, a machine-learning-based approach to decide whether one or two targets are present in the same range-velocity cell of a chirp-sequence FMCW radar system is evaluated. An experimental setup for generating sufficient large sets of training and testing data using real measurement data from automotive 77 GHz radar sensors is presented. Using this data a multi-layer perceptron is trained to directly estimate the number of present targets from the received signals in order to determine if resolution in the spatial domain is necessary. Evaluations of the trained model show that the network is able to inherently learn the underlying signal model and reach super-resolution performance.
    }, author = {Fuchs, Jonas and Weigel, Robert and Gardill, Markus}, language = {English}, booktitle = {2019 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)}, cris = {https://cris.fau.de/converis/publicweb/publication/203918515}, year = {2019}, month = {01}, day = {20}, doi = {10.1109/WISNET.2019.8711806}, eventdate = {2019-01-20/2019-01-23}, faupublication = {yes}, keywords = {Automotive Radar; Direction-of-Arrival Estimation; Neural Network; Multi-Layer Perceptron}, pages = {1--3}, peerreviewed = {unknown}, title = {Model Order Estimation using a Multi-Layer Perceptron for Direction-of-Arrival Estimation in Automotive Radar Sensors}, type = {Konferenzschrift}, venue = {Orlando, Florida, USA}, }
  • N. Muharemovic, A. Bauch, A. Hagelauer, and R. Weigel, "Transformer-based 24 GHz Power Amplifier in 65nm CMOS Technology for FMCW Applications" in 2019 IEEE RADIO AND WIRELESS SYMPOSIUM (RWS), Orlando, FL, USA, 2019, pp. 371-373. [Bibtex]
    @inproceedings{muharemovic2019,
    author = {Muharemovic, Nedim and Bauch, Andreas and Hagelauer, Amelie and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {2019 IEEE RADIO AND WIRELESS SYMPOSIUM (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/221257389},
    year = {2019},
    month = {01},
    day = {01},
    eventdate = {2019-01-20/2019-01-23},
    eventtitle = {IEEE Radio and Wireless Symposium (RWS)},
    faupublication = {yes},
    issn = {2164-2958},
    pages = {371--373},
    peerreviewed = {unknown},
    title = {Transformer-based 24 GHz Power Amplifier in 65nm CMOS Technology for FMCW Applications},
    venue = {Orlando, FL, USA},
    }
  • E. Hassan, M. Berggren, B. Scheiner, F. Michler, R. Weigel, and F. Lurz, "Design of Planar Microstrip-to-Waveguide Transitions using Topology Optimization" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{hassan2019,
    abstract = {This paper presents a topology optimization approach to design planar transitions between a microstrip line (MSL) and a rectangular waveguide (RWG) in the K-band. The transition comprises two sub-transitions: one from the MSL to a substrate integrated waveguide (SIW) and the second from the SIW to the RWG. Both are on the same substrate and can be manufactured with a standard printed circuit board process. This leads to a very cost-effective solution compared with other approaches. A WR-42 waveguide can easily be surface mounted to the transitions using a standard flange. The transitions have been fabricated, and their measured performance shows good agreement with the simulations. The MSL-SIW transition has a broadband behavior and the SIW-RWG transition still reaches a relative bandwidth of 10%.},
    author = {Hassan, Emadeldeen and Berggren, Martin and Scheiner, Benedict and Michler, Fabian and Weigel, Robert and Lurz, Fabian},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/202229996},
    year = {2019},
    month = {01},
    day = {20},
    doi = {10.1109/RWS.2019.8714566},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {unknown},
    title = {Design of Planar Microstrip-to-Waveguide Transitions using Topology Optimization},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • B. Scheiner, F. Lurz, F. Michler, I. Lau, J. Lichtblau, R. Weigel, and A. Koelpin, "Design of a Rotary Coupler for Data Transmission on Fast Rotating Mechanical Shafts and Roboter Arms" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{scheiner2019,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Lau, Isabella and Lichtblau, Johann and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/204085644},
    year = {2019},
    month = {01},
    day = {20},
    doi = {10.1109/RWS.2019.8714480},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {unknown},
    title = {Design of a Rotary Coupler for Data Transmission on Fast Rotating Mechanical Shafts and Roboter Arms},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • M. Völkel, A. Schrotz, R. Weigel, and A. Hagelauer, "A 60-GHz Integrated Radar Transmitter with Multiple Frequency Inputs and Digital Adjustable Gain in a 130-nm BiCMOS Technology" in IEEE Radio and Wireless Symposium, Orlando, Florida, USA, 2019. [Bibtex]
    @inproceedings{voelkel2019a,
    abstract = {In this paper a 60 GHz monolithic transmitter for
    high precision based industrial radar systems is presented. The
    integrated transmitter has been designed using a 0.13μm SiGe
    BiCMOS process from IHP (SG13G2) and includes multiplier,
    multiplexer, power amplifier and a digital interface. For testing,
    a PCB interface adapter is developed to control and supply the
    chip directly on the wafer prober. The integrated transmitter
    circuit has a size of 1800μm x 1600μm and a maximum power
    consumption of 148.5mW from a 3.3V power supply. The circuit
    provides four frequency inputs and multiplies them up to 60 GHz.
    The chip delivers a output power of 8dBm at 60GHz and min.
    5dBm over a frequency range from 55 to 65 GHz. The input
    path is switched and the output power is adjustable by a digital
    interface between -20 and 8dBm at 60 GHz. This serial interface
    is realized in 0.13μm CMOS logic and consists of a 15 bit shift
    register, decoder and and analog interface.
    }, author = {Völkel, Matthias and Schrotz, Albert-Marcel and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {IEEE Radio and Wireless Symposium}, cris = {https://cris.fau.de/converis/publicweb/publication/205597252}, year = {2019}, month = {01}, day = {22}, eventdate = {2019-01-20/2018-10-23}, faupublication = {yes}, keywords = {industrial radar,transmitter,millimeter wave circuits,SiGe BiCMOS}, peerreviewed = {unknown}, title = {A 60-GHz Integrated Radar Transmitter with Multiple Frequency Inputs and Digital Adjustable Gain in a 130-nm BiCMOS Technology}, type = {Konferenzschrift}, venue = {Orlando, Florida, USA}, }
  • M. Völkel, R. Weigel, and A. Hagelauer, "A Digital Adjustable 60-GHz Integrated Sixport Receiver Front-End in a 130-nm BiCMOS Technology" in RWW, Orlando, Florida, USA, 2019. [Bibtex]
    @inproceedings{voelkel2019,
    abstract = {In this paper, a fully integrated digital adjustable
    sixport receiver front-end working at 60GHz is presented.
    The circuit features two variable gain amplifier, the
    passive sixport network, four detectors and a SPI-interface.
    Application area are industrial radar or angle of arrival
    detection. The phase measurement is done by superposition
    and power detection of two millimeter wave signals. The
    integrated circuit has a power consumption of 88.44mW from
    a 3.3V supply voltage. It is fabricated in a 0.13μm SiGe
    BiCMOS process and has a size of 1560μm x 1000 μm. The
    RF and reference input power can be adjusted in a 21 dB
    range over a 12 bit digital interface. The receiver exhibits
    a 1 dB compression point of -21.9 dB. RF signals down to
    -55dBm are detectable.
    }, author = {Völkel, Matthias and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {RWW}, cris = {https://cris.fau.de/converis/publicweb/publication/204214221}, year = {2019}, month = {01}, day = {19}, eventdate = {2019-01-19/2019-01-23}, faupublication = {yes}, keywords = {angle of arrival,industrial radar,interferometer,phase measurement,SiGe BiCMOS,sixport}, peerreviewed = {unknown}, title = {A Digital Adjustable 60-GHz Integrated Sixport Receiver Front-End in a 130-nm BiCMOS Technology}, type = {Konferenzschrift}, venue = {Orlando, Florida, USA}, }
  • S. Linz, F. Lurz, R. Weigel, and A. Koelpin, "Extended ellipse-based reconstruction algorithm for six-port radar" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{linz2019,
    author = {Linz, Sarah and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/205587067},
    year = {2019},
    month = {01},
    day = {20},
    doi = {10.1109/RWS.2019.8714294},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Extended ellipse-based reconstruction algorithm for six-port radar},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • R. Ciocoveanu, R. Weigel, A. Hagelauer, and V. Issakov, "A 60 GHz 30.5% PAE Differential Stacked PA with Second Harmonic Control in 45 nm PD-SOI CMOS" in IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, Orlando, FL, USA, 2019. [Bibtex]
    @inproceedings{ciocoveanu2019,
    abstract = {This paper presents a 60GHz highly efficient single-stage differential stacked Class AB power amplifier (PA) with second harmonic control. The circuit has been realized in a 45 nm PD-SOI CMOS technology. Measurement results show that the power amplifier achieves a maximum output power (Pmax) of 15.3dBm with a competitive maximum power-added efficiency (PAEmax) of 30.5% at 60 GHz. The output-referred 1-dB compression point (OP1dB) is 9.5 dBm. Furthermore, the circuit draws 40mA from a 1.8V supply and the chip core size is 0.36mm x 0.35 mm.},
    author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    language = {English},
    booktitle = {IEEE Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems},
    cris = {https://cris.fau.de/converis/publicweb/publication/204681005},
    year = {2019},
    month = {01},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    keywords = {Power Amplifier,High-Power,High-Efficiency,PD-SOI.},
    peerreviewed = {unknown},
    title = {A 60 GHz 30.5% PAE Differential Stacked PA with Second Harmonic Control in 45 nm PD-SOI CMOS},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • N. Duda, A. Barthule, S. Ripperger, F. Mayer, R. Weigel, and A. Koelpin, "Non-Invasive Low Power ECG for Heart Beat Detection of Bats" in 2019 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Orlando, Florida, USA, 2019. [DOI] [Bibtex]
    @inproceedings{duda2019,
    abstract = {In this paper a small size low power electrocardiogram (ECG) system which is optimized for the heart rate detection of bats is proposed. Due to the smaller size and different physical properties of animals like bats the system has to fulfill different requirements than standard human ECGs. The usecase of animal monitoring also requires an ultra-low power approach to enable long battery runtime. The described system has been evaluated with measurements on bats and compared to a commercially available ECG integrated circuit (IC). Apart from the ECG circuit itself the electrodes and the electrode position as well as the used algorithms are evaluated.},
    author = {Duda, Niklas and Barthule, Alexander and Ripperger, Simon and Mayer, Frieder and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2019 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/204219980},
    year = {2019},
    month = {01},
    day = {23},
    doi = {10.1109/WISNET.2019.8711816},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Non-Invasive Low Power ECG for Heart Beat Detection of Bats},
    type = {Konferenzschrift},
    venue = {Orlando, Florida, USA},
    }
  • B. Scheiner, S. Schellenberger, K. Shi, E. Heusinger, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Low-power contactless LC-tank based respiratory sensor", Electronics Letters, pp. 304-306, 2019. [DOI] [Bibtex]
    @article{scheiner2019a,
    author = {Scheiner, Benedict and Schellenberger, Sven and Shi, Kilin and Heusinger, Elisabeth and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    cris = {https://cris.fau.de/converis/publicweb/publication/208613711},
    year = {2019},
    month = {01},
    day = {29},
    doi = {10.1049/EL.2018.7936},
    faupublication = {yes},
    issn = {0013-5194},
    journaltitle = {Electronics Letters},
    pages = {304--306},
    peerreviewed = {Yes},
    shortjournal = {ELECTRON LETT},
    title = {Low-power contactless LC-tank based respiratory sensor},
    type = {Letter},
    }
  • S. Erhardt, R. Weigel, and A. Koelpin, "A Small and Lightweight Ultra-Low Power GSM Cell Tracker" in 2019 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Orlando, Florida, 2019, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{erhardt2019,
    abstract = {In this publication a logger is introduced that is small and lightweight enough to be carried by bats. It tracks the GSM downlink spectrum, enabling coarse localization. The logger contains a Sub-GHz transceiver, a microcontroller and a DC/DC converter assembled on a flexible printed circuit board (PCB) that is directly mounted on a lithium coin cell battery. The total weight is approximately 2.1 g and the size is comparable to two stacked 1 Euro Cent coins after coating the logger with epoxy resin. A flexible nickel titanium wire antenna is used for receiving GSM signals and for transmitting in the European 868 MHz short-range devices (SRD) band. In a short-term field test the functionality was proven.},
    author = {Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    booktitle = {2019 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/207435679},
    year = {2019},
    month = {01},
    day = {20},
    doi = {10.1109/WISNET.2019.8711804},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    issn = {2473-4624},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {A Small and Lightweight Ultra-Low Power GSM Cell Tracker},
    type = {Konferenzschrift},
    venue = {Orlando, Florida},
    }
  • F. Michler, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "(Micro)metering with Microwaves: A Low-Cost Low-Power High-Precision Radar System", IEEE Microwave Magazine, vol. 20, iss. 1, pp. 91-97, 2019. [DOI] [Bibtex]
    @article{michler2019,
    author = {Michler, Fabian and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/203795705},
    year = {2019},
    month = {01},
    day = {01},
    doi = {10.1109/MMM.2018.2875612},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {1},
    pages = {91--97},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {(Micro)metering with Microwaves: A Low-Cost Low-Power High-Precision Radar System},
    url = {https://ieeexplore.ieee.org/document/8575185},
    volume = {20},
    }
  • T. Reißland, B. Lenhart, J. Lichtblau, M. Sporer, A. Koelpin, and R. Weigel, "Evaluation of ISAR-based autofocus methods for estimation of true-speed-over-ground using a 24 GHz FMCW-Radar" in Asia-Pacific Microwave Conference, Kyoto, Japan, 2019. [DOI] [Bibtex]
    @inproceedings{reissland2018a,
    abstract = {This paper presents a novel approach for the determination of True-Speed-Over-Ground for trains. The approach utilizes the inverse synthetic aperture radar (ISAR) technique. Several focus metrics are evaluated and tested. The tests were carried out in an laboratory environment. The results are compared to an alternative correlation-based approach.},
    author = {Reißland, Torsten and Lenhart, Björn and Lichtblau, Johann and Sporer, Michael and Koelpin, Alexander and Weigel, Robert},
    language = {English},
    booktitle = {Asia-Pacific Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/203791311},
    year = {2019},
    month = {01},
    day = {17},
    doi = {10.23919/APMC.2018.8617123},
    eventdate = {2018-11-06/2018-11-09},
    faupublication = {yes},
    isbn = {9784902339451},
    keywords = {focusing; measurement systems; synthetic aperture radar; velocity measurement},
    peerreviewed = {Yes},
    title = {Evaluation of ISAR-based autofocus methods for estimation of true-speed-over-ground using a 24 GHz FMCW-Radar},
    type = {Konferenzschrift},
    venue = {Kyoto, Japan},
    }
  • F. Michler, K. Shi, S. Schellenberger, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "Pulse Wave Velocity Detection Using a 24 GHz Six-Port Based Doppler Radar" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{michler2019a,
    author = {Michler, Fabian and Shi, Kilin and Schellenberger, Sven and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/202125433},
    year = {2019},
    month = {01},
    day = {20},
    doi = {10.1109/RWS.2019.8714521},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    isbn = {9781538659441},
    issn = {2164-2974},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Pulse Wave Velocity Detection Using a 24 GHz Six-Port Based Doppler Radar},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • V. Issakov, S. Kehl-Waas, and S. Breun, "Analytical Equivalent Circuit Extraction Procedure for Broadband Scalable Modeling of Three-Port Center-Tapped Symmetric On-Chip Inductors", IEEE Transactions on Circuits and Systems I-Regular Papers, vol. 66, iss. 9, pp. 3557-3570, 2019. [DOI] [Bibtex]
    @article{issakov2019a,
    abstract = {This paper presents a new, almost fully analytical methodology for component value extraction of a double-π equivalent circuit model for three-port on-chip inductors from a given S-parameter dataset. The compact model provides an accurate fit over a wide frequency range from dc to beyond the self-resonance frequency (SRF) to a tabular input S-parameter model describing a symmetric center-tapped on-chip inductor. The input dataset may be obtained from a measurement or from an electromagnetic field solver simulation. Using a passive broadband equivalent circuit instead of the original S-parameters' description is advantageous for circuit design, as it facilitates the convergence of transient simulations. The proposed approach carefully considers center-tap parasitics. Hence, the obtained equivalent circuit model fits the input inductor characteristics accurately not only for differential excitation but also in the common-mode and single-ended operation. Due to the fact that the proposed extraction approach is based on physical assumptions and analytical circuit decomposition, the obtained component values are physically meaningful and relate to geometry. Thus, this approach is suitable for the generation of scalable compact models, which can be used to speed-up inductor optimization during the RF circuit design. The proposed methodology has been verified on a three-port inductor realized in a 28-nm CMOS technology and measured up to 60 GHz. The extracted equivalent circuit model exhibits an accurate fit to the measured data over the entire frequency range in all operation modes. Finally, field-solver models are used to verify the scalability.
    }, author = {Issakov, Vadim and Kehl-Waas, Sebastian and Breun, Sascha}, cris = {https://cris.fau.de/converis/publicweb/publication/227025706}, year = {2019}, doi = {10.1109/TCSI.2019.2926737}, faupublication = {yes}, issn = {1549-8328}, journaltitle = {IEEE Transactions on Circuits and Systems I-Regular Papers}, keywords = {circuit optimisation;CMOS integrated circuits;equivalent circuits;inductors;integrated circuit modelling;multiport networks;network analysis;radiofrequency integrated circuits;S-parameters;input inductor characteristics;analytical circuit decomposition;analytical equivalent circuit extraction procedure;component value extraction;double-π equivalent circuit model;self-resonance frequency;symmetric center-tapped on-chip inductor;passive broadband equivalent circuit;center-tap parasitics;Broadband Scalable Modeling;three-port center-tapped symmetric on-chip inductors;S-parameter dataset;electromagnetic field solver simulation;single-ended operation;common-mode operation;transient simulations;CMOS technology;Integrated circuit modeling;Inductors;Equivalent circuits;Analytical models;Scattering parameters;Geometry;Numerical models;Equivalent circuit;on-chip inductor;center-tap}, number = {9}, pages = {3557--3570}, peerreviewed = {Yes}, shortjournal = {IEEE T CIRCUITS-I}, title = {Analytical Equivalent Circuit Extraction Procedure for Broadband Scalable Modeling of Three-Port Center-Tapped Symmetric On-Chip Inductors}, volume = {66}, }
  • A. Och, J. O. Schrattenecker, S. Schuster, P. A. Hölzl, P. F. Freidl, S. Scheiblhofer, D. Zankl, and R. Weigel, "Accuracy bounds and measurements of a contactless permittivity sensor for gases using synchronized low-cost mm-wave frequency modulated continuous wave radar transceivers", Sensors, vol. 19, iss. 15, 2019. [DOI] [Bibtex]
    @article{och2019,
    abstract = {A primary concern in a multitude of industrial processes is the precise monitoring of gaseous substances to ensure proper operating conditions. However, many traditional technologies are not suitable for operation under harsh environmental conditions. Radar-based time-of-flight permittivity measurements have been proposed as alternative but suffer from high cost and limited accuracy in highly cluttered industrial plants. This paper examines the performance limits of low-cost frequency-modulated continuous-wave (FMCW) radar sensors for permittivity measurements. First, the accuracy limits are investigated theoretically and the Cramér-Rao lower bounds for time-of-flight based permittivity and concentration measurements are derived. In addition, Monte-Carlo simulations are carried out to validate the analytical solutions. The capabilities of the measurement concept are then demonstrated with different binary gas mixtures of Helium and Carbon Dioxide in air. A low-cost time-of-flight sensor based on two synchronized fully-integrated millimeter-wave (MMW) radar transceivers is developed and evaluated. A method to compensate systematic deviations caused by the measurement setup is proposed and implemented. The theoretical discussion underlines the necessity of exploiting the information contained in the signal phase to achieve the desired accuracy. Results of various permittivity and gas concentration measurements are in good accordance to reference sensors and measurements with a commercial vector network analyzer (VNA). In conclusion, the proposed radar-based low-cost sensor solution shows promising performance for the intended use in demanding industrial applications.},
    author = {Och, Andreas and Schrattenecker, Jochen O. and Schuster, Stefan and Hölzl, Patrick A. and Freidl, Philipp F. and Scheiblhofer, Stefan and Zankl, Dominik and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/224752423},
    year = {2019},
    doi = {10.3390/S19153351},
    faupublication = {yes},
    issn = {1424-8220},
    journaltitle = {Sensors},
    keywords = {Cramér-Rao bounds; Gas detectors; Millimeter wave radar; Permittivity; Phase estimation; Radar measurements; Time of arrival estimation},
    number = {15},
    peerreviewed = {Yes},
    shortjournal = {SENSORS-BASEL},
    title = {Accuracy bounds and measurements of a contactless permittivity sensor for gases using synchronized low-cost mm-wave frequency modulated continuous wave radar transceivers},
    volume = {19},
    }
  • F. X. Röhrl, J. Jakob, W. Bogner, R. Weigel, and S. Zorn, "Bare die connections via aerosol jet technology for millimeter wave applications", International Journal of Microwave and Wireless Technologies, 2019. [DOI] [Bibtex]
    @article{roehrl2019,
    abstract = {This paper presents a comparison of chip connections using aerosol jet (AJ) and bond technology on low-cost printed circuit board (PCB) substrates. First, the behavior of the used gap filler material and the used silver ink for AJ technology on PCBs are characterized. In addition to comparing the radio frequency (RF) performance (DC to 67 GHz) of the two technologies, the mechanical stability is also compared. While the AJ technology transitions score above all for their RF performance and the lower requirements (surface finish, pad size, and adhesion) on the PCB, the bonding technology has clear advantages, especially with a different coefficient of thermal expansion values of the substrates to be connected. Finally, the measurement results of a complete package are shown, whereby the chip connection is realized once by means of AJ and once by bonding wires.},
    author = {Röhrl, Franz Xaver and Jakob, Johannes and Bogner, Werner and Weigel, Robert and Zorn, Stefan},
    cris = {https://cris.fau.de/converis/publicweb/publication/221621568},
    year = {2019},
    doi = {10.1017/S1759078719000114},
    faupublication = {yes},
    issn = {1759-0787},
    journaltitle = {International Journal of Microwave and Wireless Technologies},
    keywords = {additive manufacturing; Aerosol jet technology; bare die connection; bond transitions; inkjet; millimeter wave},
    peerreviewed = {Yes},
    title = {Bare die connections via aerosol jet technology for millimeter wave applications},
    }

2018

  • R. Ciocoveanu, R. Weigel, A. Hagelauer, A. Geiselbrechtinger, and V. Issakov, "5G mm-Wave Stacked Class AB Power Amplifier in 45 nm PD-SOI CMOS" in 5G mm-Wave Stacked Class AB Power Amplifier in 45 nm PD-SOI CMOS, Kyoto International Conference Center, Kyoto, Japan, Japan, 2018. [Bibtex]
    @inproceedings{ciocoveanu2018c,
    abstract = {This paper presents a single-stage stacked Class AB power amplifier (PA) with lower complexity for fifth generation (5G) K/Ka band front-ends that has been realized in a 45nm PDSOI CMOS technology. Measurement results show that the power amplifier achieves a saturated output power (Psat) of 17.3 dBm with a 39.7% maximum power-added efficiency (PAEmax) at 24 GHz. The output-referred 1-dB compression point (OP1dB) is 14.3dBm and the saturated output power varies from 15.9dBm to 17.3dBm for a frequency range from 22 GHz to 28 GHz. Furthermore, the circuit draws 40mA from a 2.9V supply and the chip core size is 0.35mm x 0.25 mm.},
    author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie and Geiselbrechtinger, Angelika and Issakov, Vadim},
    language = {English},
    booktitle = {5G mm-Wave Stacked Class AB Power Amplifier in 45 nm PD-SOI CMOS},
    cris = {https://cris.fau.de/converis/publicweb/publication/203983358},
    year = {2018},
    month = {12},
    day = {15},
    eventdate = {2018-11-06/2018-11-09},
    eventtitle = {2018 Asia-Pacific Microwave Conference (APMC 2018)},
    faupublication = {yes},
    keywords = {Stacked PA; 45nm PD-SOI; 5G; High Power; High Efficiency},
    peerreviewed = {unknown},
    title = {5G mm-Wave Stacked Class AB Power Amplifier in 45 nm PD-SOI CMOS},
    type = {Konferenzschrift},
    venue = {Kyoto International Conference Center, Kyoto, Japan, Japan},
    }
  • J. Lichtblau, B. Scheiner, F. Michler, M. Gräbner, B. Sanftl, R. Weigel, and A. Koelpin, "Novel Approach for Virtual Coupling of Trains Using Different Modulation and Coding Schemes" in 2018 International Conference on Intelligent Rail Transportation (ICIRT), Singapur, Singapore, 2018. [DOI] [Bibtex]
    @inproceedings{lichtblau2018b,
    abstract = {This paper examines different modulation and coding schemes (MCS) as well as two antenna concepts for wireless communication at 2.4 GHz for future rail traffic applications. In particular, the virtual coupling of two rail vehicles confronts the rail industry with massive challenges regarding communications technology. Data rates above 50 Mbit/s at extremely low error rates need to be realized. Our examinations cover coding schemes such as 16 QAM up to 1024 QAM, enabling a maximum data transfer rate of 240 Mbit/s. The results indicate in which way antenna arrangements and beam alignments affect the signal quality and what MCS fulfills the train environment requirements best. Finally, the identified setup is selected and a recommendation for further research activities and tests on a rail vehicle in operation is made.
    }, author = {Lichtblau, Johann and Scheiner, Benedict and Michler, Fabian and Gräbner, Martin and Sanftl, Benedikt and Weigel, Robert and Koelpin, Alexander}, language = {English}, publisher = {IEEE}, booktitle = {2018 International Conference on Intelligent Rail Transportation (ICIRT)}, cris = {https://cris.fau.de/converis/publicweb/publication/204202939}, year = {2018}, month = {12}, day = {14}, doi = {10.1109/ICIRT.2018.8641557}, eventdate = {2018-12-12/2018-12-14}, eventtitle = {2018 IEEE International Conference on Intelligent Rail Transportation (ICIRT)}, faupublication = {yes}, isbn = {9781538675281}, keywords = {wireless train communication,orthogonal frequency-division multiplexing,virtual coupling}, peerreviewed = {unknown}, title = {Novel Approach for Virtual Coupling of Trains Using Different Modulation and Coding Schemes}, type = {Konferenzschrift}, venue = {Singapur, Singapore}, }
  • J. Kirchner, S. Faghih-Naini, P. Agdemir, and G. Fischer, "Sensor Selection for Classification of Physical Activity in Long-Term Wearable Devices" in 2018 IEEE SENSORS, New Delhi, India, 2018. [DOI] [Bibtex]
    @inproceedings{kirchner2018c,
    abstract = {Classification of physical activity based on the kNN algorithm is assessed with different combinations of sensors
    (from accelerometer, gyroscope, barometer) with respect to classification accuracy, power consumption and computation time. For that purpose, a wearable sensor platform is proposed and a study with 20 subjects is conducted. The combination of accelerometer and barometer is found to provide the best trade-off for the
    three criteria: It provides an F1 score of 94.96 ± 1.73 %, while computation time and power consumption are reduced by 45 % and 88 %, respectively, compared to the full sensor set.
    }, author = {Kirchner, Jens and Faghih-Naini, Samira and Agdemir, Pinar and Fischer, Georg}, language = {English}, booktitle = {2018 IEEE SENSORS}, cris = {https://cris.fau.de/converis/publicweb/publication/203246503}, year = {2018}, month = {12}, day = {27}, doi = {10.1109/ICSENS.2018.8589663}, eventdate = {2018-10-28/2018-10-31}, faupublication = {yes}, isbn = {9781538647073}, issn = {2168-9229}, keywords = {Activity classification; wearable devices; sensors; accelerometer; gyroscope; barometer; knn; machine learning; power consumption; computation time; F1 score; sensitivity; precision}, peerreviewed = {Yes}, title = {Sensor Selection for Classification of Physical Activity in Long-Term Wearable Devices}, type = {Konferenzschrift}, venue = {New Delhi, India}, }
  • P. Schmidbauer, M. Wojnowski, R. Weigel, and A. Hagelauer, "Concepts for a Monostatic Radar Transceiver Front-end in eWLB Package with Off-Chip Quasi-Circulator for 60 GHz" in 2018 IEEE 20th Electronics Packaging Technology Conference (EPTC), Singapore, Singapore, 2018. [Bibtex]
    @inproceedings{schmidbauer2018a,
    author = {Schmidbauer, Philipp and Wojnowski, Maciej and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {2018 IEEE 20th Electronics Packaging Technology Conference (EPTC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/209907060},
    year = {2018},
    month = {12},
    day = {04},
    eventdate = {2018-12-04/2018-12-07},
    eventtitle = {20th Electronics Packaging Technology Conference (EPTC)},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Concepts for a Monostatic Radar Transceiver Front-end in eWLB Package with Off-Chip Quasi-Circulator for 60 GHz},
    type = {Konferenzschrift},
    venue = {Singapore, Singapore},
    }
  • J. Rimmelspacher, R. Weigel, and V. Issakov, "A 60 GHz Push-Push VCO in 45 nm RF-SOI CMOS Technology for Integrated Phased-Array Radar Applications" in PHAROS Event, Bordeaux, France, 2018. [Bibtex]
    @inproceedings{rimmelspacher2018e,
    abstract = {This paper presents a 60 GHz push-push voltage-controlled oscillator (VCO) for millimetre-wave (mm-wave) radar applications. The VCO is fabricated in a 45 nm partially-depleted (PD) RF silicon-on-insulator (RF-SOI) CMOS technology. The measured frequency tuning range (FTR) is 15% (56.6 – 65.7 GHz), lowest phase noise (PN) is −91.3 dBc/Hz at 1 MHz offset and the total DC power consumption is 68 mW for a 1 V supply voltage. The simulated core DC power consumption is 10 mW. },
    author = {Rimmelspacher, Johannes and Weigel, Robert and Issakov, Vadim},
    booktitle = {PHAROS Event},
    cris = {https://cris.fau.de/converis/publicweb/publication/210258393},
    year = {2018},
    month = {12},
    day = {07},
    eventdate = {2018-12-05/2018-12-07},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A 60 GHz Push-Push VCO in 45 nm RF-SOI CMOS Technology for Integrated Phased-Array Radar Applications},
    venue = {Bordeaux, France},
    }
  • J. Rimmelspacher, R. Weigel, A. Hagelauer, and V. Issakov, "A Quad-Core 60 GHz Push-Push 45 nm SOI CMOS VCO with -101.7 dBc/Hz Phase Noise at 1 MHz offset, 19 % Continuous FTR and -187 dBc/Hz FoMT" in European Solid-State Circuits Conference (ESSCIRC), Dresden, Germany, 2018. [Bibtex]
    @inproceedings{rimmelspacher2018d,
    abstract = {This paper presents a 60 GHz Quad-Core push-push VCO in 45 nm partially depleted Silicon-on-Insulator (SOI) CMOS. The measured phase noise (PN) at 60.5 GHz is −101.7 dB/Hz at 1 MHz offset from carrier. The continuous frequency-tuning range (FTR) is 19 %. The Quad-Core VCO consumes only 40 mW DC power. The complete circuit including fundamental and second harmonic (H2) output buffers draws 110 mA from a single 1 V supply. The VCO cores are coupled via resonant-tank transformers. A similar transformer-coupled Dual-Core VCO is fabricated and measured to prove the relative PN improvement between Dual-Core and Quad-Core topology. The total area of the Quad-Core VCO excluding pads is 0.1 mm2.},
    author = {Rimmelspacher, Johannes and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    booktitle = {European Solid-State Circuits Conference (ESSCIRC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/200493727},
    year = {2018},
    month = {12},
    day = {01},
    eventdate = {2018-09-03/2018-09-06},
    faupublication = {yes},
    keywords = {millimeter-wave,wideband,silicon-on-insulator,CMOS technology,System-on-Chip},
    peerreviewed = {unknown},
    title = {A Quad-Core 60 GHz Push-Push 45 nm SOI CMOS VCO with -101.7 dBc/Hz Phase Noise at 1 MHz offset, 19 % Continuous FTR and -187 dBc/Hz FoMT},
    type = {Konferenzschrift},
    venue = {Dresden, Germany},
    }
  • F. Michler, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "A Planar 24 GHz Switched-Beam Antenna Based on PIN Diodes for Remote Sensing Applications" in 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018, pp. 402-404. [DOI] [Bibtex]
    @inproceedings{michler2018a,
    abstract = {This paper presents a planar switched-beam antenna for remote sensing applications at 24 GHz. The antenna consists of 9x8 radiating patches, arranged as nine linear arrays that are connected by phase shifters based on PIN diodes, which allow to quickly switch the main lobe between two symmetric states by using a small control current. The single array elements were designed and simulated in CST Microwave Studio and the array feed network including the phase shifters was analyzed using Keysight ADS. Measurements of all individual components and the final array antenna were taken to confirm the simulations and to prove the concept.
    }, author = {Michler, Fabian and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {2018 Asia-Pacific Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/200392474}, year = {2018}, month = {11}, day = {08}, doi = {10.23919/APMC.2018.8617541}, eventdate = {2018-11-06/2018-11-09}, faupublication = {yes}, isbn = {9784902339451}, pages = {402--404}, peerreviewed = {Yes}, title = {A Planar 24 GHz Switched-Beam Antenna Based on PIN Diodes for Remote Sensing Applications}, type = {Konferenzschrift}, venue = {Kyoto, Japan}, }
  • M. Völkel, K. Borutta, M. Dietz, K. Aufinger, R. Weigel, and A. Hagelauer, "A 110-135 GHz Integrated Sixport Receiver Front-End in a 130-nm BiCMOS Technology" in Asia-Pacific Microwave Conference, Koyoto, 2018, pp. 1-3. [Bibtex]
    @inproceedings{voelkel2018,
    abstract = {In this paper, a fully monolithic low-power sixport
    receiver front-end working from 110 to 135GHz including an
    oscillator with divider stages, a passive sixport network and four
    detectors is presented. The measurement principle is based on
    an additive superposition of two incident millimeter-wave signals.
    The receiver circuit blocks are described and the measurement
    results are presented. All components have been designed using
    a 0.13μm 250GHz fT SiGe BiCMOS technology. The whole
    integrated circuit has a size of 1960μm x 1500μm including
    bondpads and consumes 100mA from a 3.3V and 82mA from
    a 1.8V supply. The receiver exhibits a 1 dB compression point
    of -1.3dBm at the center frequency of 121.5 GHz. The VCO
    has a tuning range of 27 GHz, with a best case phase noise
    of -110 dBc/Hz at 1MHz offset measured at the divider output
    for PLL stabilization. The maximum oscillator output power is
    -0.4 dBm.
    }, author = {Völkel, Matthias and Borutta, Karl and Dietz, Marco and Aufinger, Klaus and Weigel, Robert and Hagelauer, Amelie}, editor = {Völkel, Matthias}, language = {English}, booktitle = {Asia-Pacific Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/202227788}, year = {2018}, month = {11}, day = {09}, eventdate = {2018-11-06/2018-11-09}, faupublication = {yes}, keywords = {industrial radar,communication receiver,interferometer,phase measurement,sixport,low power,SiGe BiCMOS,millimeter-wave.}, pages = {1--3}, peerreviewed = {unknown}, title = {A 110-135 GHz Integrated Sixport Receiver Front-End in a 130-nm BiCMOS Technology}, type = {Konferenzschrift}, venue = {Koyoto}, }
  • T. Reißland, B. Lenhart, J. Lichtblau, M. Sporer, R. Weigel, and A. Koelpin, "Robust Correlation based True-Speed-over-Ground Measurement System employing a FMCW Radar" in 2018 15th European Radar Conference (EuRAD), Madrid, Spain, 2018. [DOI] [Bibtex]
    @inproceedings{reissland2018,
    abstract = {This paper presents a novel approach for the determination of True-Speed-Over-Ground for trains. Speed determination is accomplished by correlating the received signals of two side-looking radar sensors. The theoretically achievable precision is derived. Test measurements are done to give a prove of concept. The measurements are done in two different scenarios. The test measurements are carried out using a bi-static 24 GHz frequency modulated continuous wave (FMCW) radar.},
    author = {Reißland, Torsten and Lenhart, Björn and Lichtblau, Johann and Sporer, Michael and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {2018 15th European Radar Conference (EuRAD)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106471244},
    year = {2018},
    month = {11},
    day = {29},
    doi = {10.23919/EURAD.2018.8546663},
    eventdate = {2018-09-26/2018-09-28},
    eventtitle = {European Microwave Week 2018},
    faupublication = {yes},
    keywords = {radar; fmcw; correlation; sar; velocity; train},
    peerreviewed = {Yes},
    title = {Robust Correlation based True-Speed-over-Ground Measurement System employing a FMCW Radar},
    type = {Konferenzschrift},
    venue = {Madrid, Spain},
    }
  • X. Huang, A. Hagelauer, L. Zhou, M. Völkel, R. Weigel, and J. Mao, "Design of a Novel Quarter-mode Substrate-Integrated Waveguide Filter With Multiple Transmission Zeros and Higher Mode Suppressions", IEEE Transactions on Microwave Theory and Techniques, vol. 66, iss. 12, pp. 5573-5584, 2018. [DOI] [Bibtex]
    @article{huang2018,
    author = {Huang, Xiao-Long and Hagelauer, Amelie and Zhou, Liang and Völkel, Matthias and Weigel, Robert and Mao, Jun-Fa},
    cris = {https://cris.fau.de/converis/publicweb/publication/207576313},
    year = {2018},
    month = {11},
    day = {20},
    doi = {10.1109/TMTT.2018.2879087},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {12},
    pages = {5573--5584},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Design of a Novel Quarter-mode Substrate-Integrated Waveguide Filter With Multiple Transmission Zeros and Higher Mode Suppressions},
    type = {Article in Journal},
    volume = {66},
    }
  • R. Ciocoveanu, R. Weigel, A. Hagelauer, and V. Issakov, "A Low Insertion-Loss 10-110 GHz Digitally Tunable SPST Switch in 22 nm FD-SOI CMOS" in A Low Insertion-Loss 10-110 GHz Digitally Tunable SPST Switch in 22 nm FD-SOI CMOS, San Diego, California, USA, USA, 2018. [Bibtex]
    @inproceedings{ciocoveanu2018b,
    abstract = {This paper presents a wideband digitally tunable SPST switch based on the travelling-wave concept that has been realized in a 22 nm FD-SOI CMOS technology. The digital control for return loss is performed through mutual inductance switching. Small-signal measurement results show that the proposed SPST switch achieves a bandwidth of 10-110 GHz, with an insertion loss of 1.2 dB at 60 GHz and a 24 dB isolation at 60 GHz, whereas large-signal measurements show a 1-dB compression point of +7 dBm at 24 GHz. Furthermore, the 3 digital control bits allow tuning return loss center frequency by approximately 7 GHz. The chip core size is 0.12 mm x 0.15 mm.},
    author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    language = {English},
    booktitle = {A Low Insertion-Loss 10-110 GHz Digitally Tunable SPST Switch in 22 nm FD-SOI CMOS},
    cris = {https://cris.fau.de/converis/publicweb/publication/203983033},
    year = {2018},
    month = {11},
    day = {15},
    eventdate = {2018-10-14/2018-10-17},
    eventtitle = {2018 IEEE BiCMOS and Compound Semiconductor Integrated Circuits and Technology Symposium (BCICTS)},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A Low Insertion-Loss 10-110 GHz Digitally Tunable SPST Switch in 22 nm FD-SOI CMOS},
    type = {Konferenzschrift},
    venue = {San Diego, California, USA, USA},
    }
  • A. Och, C. Pfeffer, J. Schrattenecker, S. Schuster, and R. Weigel, "A Scalable 77 GHz Massive MIMO FMCW Radar by Cascading Fully-Integrated Transceivers" in Proceedings of 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018, pp. 1340-1342. [Bibtex]
    @inproceedings{och2018,
    abstract = {Advanced Driver Assistance Systems (ADAS) as well as multiple industrial imaging applications highly benefit from increased angular resolution in millimeter-wave (mmW) phased-array radar systems. To achieve this, future radar systems will need a high amount of transmitter (TX) and receiver (RX) channels while at the same time being suitable for mass-production. Therefore we propose a concept to realize a scalable massive multiple-input-multiple-output (MIMO) radar system by cascading fully-integrated frequency-modulated continuous-wave (FMCW) transceivers, thus reducing system cost and complexity. Prototype hardware with 5 transceivers (TRXs) is built and tested under laboratory and application-near conditions. First results show an angular resolution of 2.4° in azimuth in good accordance to the simulations. Parked cars and their surrounding scenery in front of the radar module can be clearly distinguished.
    }, author = {Och, Andreas and Pfeffer, Clemens and Schrattenecker, Jochen and Schuster, Stefan and Weigel, Robert}, editor = {Institute of Electronics, Information and (IEICE), Communication Engineers}, language = {English}, booktitle = {Proceedings of 2018 Asia-Pacific Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/207279706}, year = {2018}, month = {11}, day = {06}, eventdate = {2018-11-06/2018-11-09}, eventtitle = {2018 Asia-Pacific Microwave Conference}, faupublication = {yes}, keywords = {chirp radar; massive MIMO; millimeter wave radar; phased array radar; road vehicle radar}, pages = {1340--1342}, peerreviewed = {unknown}, title = {A Scalable 77 GHz Massive MIMO FMCW Radar by Cascading Fully-Integrated Transceivers}, type = {Konferenzschrift}, venue = {Kyoto, Japan}, }
  • K. Shi, S. Schellenberger, T. Steigleder, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Contactless Carotid Pulse Measurement Using Continuous Wave Radar" in 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018. [Bibtex]
    @inproceedings{shi2018b,
    abstract = {Cardiovascular diseases are one of the major causes of death. Regular checkups and preventive actions can drastically help reducing fatal incidences. This can be achieved by monitoring the carotid artery or rather the carotid pulse signal. Commonly, ultrasound devices are used for that purpose. However, these devices are costly, mostly stationary and their usage requires training and experience. This paper investigates the possible usage of radar systems as a contactless and low-cost alternative for carotid pulse measurements. Theoretical investigations reveal a linear relationship between the measurands of both devices and synchronous recordings from three test persons further confirm the feasibility of using radar systems as a potential device for monitoring cardiovascular diseases.},
    author = {Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 Asia-Pacific Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/202749417},
    year = {2018},
    month = {11},
    day = {06},
    eventdate = {2018-11-06/2018-08-09},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Contactless Carotid Pulse Measurement Using Continuous Wave Radar},
    type = {Konferenzschrift},
    venue = {Kyoto, Japan},
    }
  • K. Bernhart, D. Werner, M. Greif, C. Eßelmann, E. Schwenzfeier-Hellkamp, and K. Reiter, "Einfluss von unterschiedlichen Lichtspektren, Lichtlängen und Beleuchtungsstärken auf das Verhalten von Milchkühen" in 50. internationalen Tagung Angewandte Ethologie, Freiburg i. Br., 2018. [Bibtex]
    @inproceedings{bernhart2018,
    author = {Bernhart, Kristin and Werner, Daniel and Greif, Maike and Eßelmann, Christian and Schwenzfeier-Hellkamp, Eva and Reiter, Klaus},
    booktitle = {50. internationalen Tagung Angewandte Ethologie},
    cris = {https://cris.fau.de/converis/publicweb/publication/204755515},
    year = {2018},
    month = {11},
    day = {22},
    eventdate = {2018-11-22/2018-11-24},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Einfluss von unterschiedlichen Lichtspektren, Lichtlängen und Beleuchtungsstärken auf das Verhalten von Milchkühen},
    type = {undefined},
    venue = {Freiburg i. Br.},
    }
  • F. X. Röhrl, J. Jakob, W. Bogner, R. Weigel, and S. Zorn, "Bare Die Connections via Aerosol Jet Technology for Millimeter Wave Applications" in European Microwave Conference, Madrid, Spain, 2018, p. 4. [DOI] [Bibtex]
    @inproceedings{roehrl2018,
    abstract = {This paper presents a comparison of chip connections using Aerosol Jet (AJ) and Bond technology on low cost PCB substrates. First, the behavior of the used gap filler material and the used silver ink on printed circuit boards are characterized. In addition to comparing the RF performance (DC to 67 GHz) of the two technologies, the mechanical stability is also compared. While the AJ technology transitions score above all for their RF performance and the lower requirements (surface finish, pad size and adhesion) on the PCB, the bonding technology has clear advantages, especially with different coefficient of thermal expansion (CTE) values of the substrates to be connected. Finally, the measurement results of a complete package are shown, whereby the chip connection is realized once by means of aerosol jet and once by bonding wires.},
    author = {Röhrl, Franz Xaver and Jakob, Johannes and Bogner, Werner and Weigel, Robert and Zorn, Stefan},
    language = {English},
    publisher = {IEEE},
    booktitle = {European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/107112544},
    year = {2018},
    month = {11},
    day = {22},
    doi = {10.23919/EUMC.2018.8541697},
    faupublication = {yes},
    isbn = {9782874870514},
    keywords = {Aerosol jet technology,chip connection,bare die connection,organic chip package; RF package; impedance controlled PCB; millimeter wave; wideband package},
    pages = {4},
    peerreviewed = {Yes},
    title = {Bare Die Connections via Aerosol Jet Technology for Millimeter Wave Applications},
    type = {Konferenzschrift},
    url = {https://ieeexplore.ieee.org/document/8541697},
    venue = {Madrid, Spain},
    }
  • F. Lurz, E. Halder, P. Dingler, G. Sept-Enzel, B. Scheiner, R. Weigel, and A. Koelpin, "Reader Concept for Wireless Resonant Surface Acoustic Wave Instrumentation based on Instantaneous Frequency Measurement" in SAW Sensor & Actuator Symposium, Dresden, Germany, 2018. [Bibtex]
    @inproceedings{lurz2018e,
    author = {Lurz, Fabian and Halder, Ernst and Dingler, Peter and Sept-Enzel, Gerold and Scheiner, Benedict and Weigel, Robert and Koelpin, Alexander},
    booktitle = {SAW Sensor & Actuator Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/201268528},
    year = {2018},
    month = {10},
    day = {01},
    eventdate = {2018-10-01/2018-10-02},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Reader Concept for Wireless Resonant Surface Acoustic Wave Instrumentation based on Instantaneous Frequency Measurement},
    type = {Abstract zum Vortrag},
    venue = {Dresden, Germany},
    }
  • M. Gardill, J. Fuchs, C. Frank, and R. Weigel, "A Multi-Layer Perceptron Applied to Number of Target Indication for Direction-of-Arrival Estimation in Automotive Radar Sensors" in 2018 IEEE 28th International Workshop on Machine Learning for Signal Processing (MLSP), Aalborg, Denmark, 2018, pp. 1-6. [DOI] [Bibtex]
    @inproceedings{gardill2018,
    author = {Gardill, Markus and Fuchs, Jonas and Frank, Christian and Weigel, Robert},
    language = {English},
    booktitle = {2018 IEEE 28th International Workshop on Machine Learning for Signal Processing (MLSP)},
    cris = {https://cris.fau.de/converis/publicweb/publication/200736205},
    year = {2018},
    month = {10},
    day = {17},
    doi = {10.1109/MLSP.2018.8516952},
    eventdate = {2018-09-17/2018-09-20},
    faupublication = {yes},
    keywords = {Automotive Radar; Direction-of-Arrival Estimation; Neural Network; Multi-Layer Perceptron},
    pages = {1--6},
    peerreviewed = {Yes},
    title = {A Multi-Layer Perceptron Applied to Number of Target Indication for Direction-of-Arrival Estimation in Automotive Radar Sensors},
    type = {Konferenzschrift},
    venue = {Aalborg, Denmark},
    }
  • M. Kloc, Adaptive Echtzeit-Drahtloskommunikation für den Test von Automobilsystemen, 1 ed., Verlag Dr. Hut, 2018.. [Bibtex]
    @book{kloc2018,
    abstract = {

    Die Komplexität von automobilen Steuergeräten und Systemen nimmt stetig zu. Um den immer größer werdenden Funktionsumfang abzusichern und die steigenden Anforderungen an Sicherheit, Zuverlässigkeit, Komfort und Umweltverträglichkeit zu erfüllen, werden leistungsfähige und zuverlässige Testlösungen, z.B. auf Basis von Hardware-in-the-Loop (HIL), benötigt. Aufgrund dessen wird in dieser Arbeit ein innovatives, leistungsfähiges Punkt-zu-Punkt-Kommunikationssystem vorgestellt, das eine drahtlose, bidirektionale Echtzeitübertragung von zeitkritischen Kontroll-, Diagnose- und Kalibrierdaten (KoDiKa) zwischen einem HIL-Testsystem und einem Steuergerät oder Bussystem (z.B. FlexRay) mit niedrigen Zykluszeiten von bis zu 1 ms ermöglicht. Dieser Ansatz eröffnet neuartige, mobile Testmöglichkeiten z.B. auf Teststrecken.

    Zunächst wird hierzu ein Konzept des drahtlosen Echtzeit-Gateways (DEGs) präsentiert, welches auf dem flexiblen Software Defined Radio-Ansatz (SDR) und der Bitübertragungsschicht nach WLAN-Standard IEEE 802.11p basiert. Dieser einzigartige DEG-Transceiver ermöglicht einen gleichzeitigen Betrieb auf mehreren Übertragungskanälen. Die daraus resultierende spektrale Agilität des DEGs verbessert den für die zyklische KoDiKa-Nutzdatenübertragung erforderlichen deterministischen Spektrumzugriff in unlizenzierten Frequenzbändern trotz des verpflichtenden Listen-before-Talk-Verfahrens.

    Die Leistungs- und Echtzeitfähigkeit dieses Konzepts wird anschließend mit Hilfe von MATLAB-Simulationen evaluiert und charakterisiert. Dabei wird speziell anhand einer einzigartigen Koexistenzuntersuchung auf Grundlage von gemessenen Interferenzsignalen im unlizenzierten 2,4 GHz-Frequenzband gezeigt, dass die geforderte KoDiKa-Paketübertragungszuverlässigkeit sowie die Nutzdatenrate von 99% und 2 Mbit/s in einem mehrkanaligen DEG-Betrieb trotz durch koexistent operierende Drahtlosgeräte verursachten Interferenzen sichergestellt werden können.

    Weiterhin wird im Rahmen dieser Arbeit ein SDR-Prototyp des konzipierten DEGs unter Verwendung der agilen SDR-Plattform Nutaq ZeptoSDR, bei dem die gesamte digitale Basisbandsignalverarbeitung des DEGs ressourceneffizient in einem FPGA implementiert ist, gezeigt. Auf Grundlage dieses SDR-Prototypen wird zum einen die Realisierbarkeit des DEG-Transceivers demonstriert. Zum anderen wird ergänzend zu den MATLAB-Simulationen die Verbesserung der KoDiKa-Paketübertragungszuverlässigkeit in einem zweikanaligen DEG-Betrieb nachgewiesen.

    }, author = {Kloc, Matej}, language = {German}, publisher = {Verlag Dr. Hut}, cris = {https://cris.fau.de/converis/publicweb/publication/206790851}, year = {2018}, month = {10}, day = {31}, edition = {1}, faupublication = {yes}, isbn = {9783843938105}, peerreviewed = {unknown}, series = {Kommunikationstechnik}, title = {Adaptive Echtzeit-Drahtloskommunikation für den Test von Automobilsystemen}, type = {undefined}, }
  • N. Duda, T. Nowak, M. Hartmann, M. Schadhauser, B. Cassens, P. Wägemann, M. Nabeel, S. Ripperger, S. Herbst, K. Meyer-Wegener, F. Mayer, F. Dressler, W. Schröder-Preikschat, R. Kapitza, J. Robert, J. Thielecke, R. Weigel, and A. Koelpin, "BATS: Adaptive Ultra Low Power Sensor Network for Animal Tracking", Sensors, 2018. [DOI] [Bibtex]
    @article{duda2018a,
    abstract = {In this paper, the BATS project is presented which aims to track the behavior of bats via
    an ultra-low power wireless sensor network. An overview about the whole project and its parts
    like sensor node design, tracking grid and software infrastructure is given and the evaluation of the
    project is shown. The BATS project includes a lightweight sensor node that is attached to bats and
    combines multiple features. Communication among sensor nodes allows tracking of bat encounters.
    Flight trajectories of individual tagged bats can be recorded at high spatial and temporal resolution
    by a ground node grid. To increase the communication range the BATS project implemented a
    long-range telemetry system to still receive sensor data outside the standard ground node network.
    The whole system is designed with the common goal of ultra-low energy consumption while still
    maintaining optimal measurement results. To this end, the system is designed in a flexible way and
    is able to adapt its functionality according to the current situation. In this way it uses the energy
    available on the sensor node as efficient as possible.

    }, author = {Duda, Niklas and Nowak, Thorsten and Hartmann, Markus and Schadhauser, Michael and Cassens, Björn and Wägemann, Peter and Nabeel, Muhammad and Ripperger, Simon and Herbst, Sebastian and Meyer-Wegener, Klaus and Mayer, Frieder and Dressler, Falko and Schröder-Preikschat, Wolfgang and Kapitza, Rüdiger and Robert, Jörg and Thielecke, Jörn and Weigel, Robert and Koelpin, Alexander}, language = {English}, cris = {https://cris.fau.de/converis/publicweb/publication/204216811}, year = {2018}, month = {10}, day = {07}, doi = {10.3390/S18103343}, faupublication = {yes}, issn = {1424-8220}, journaltitle = {Sensors}, keywords = {wireless sensor networks; animal tracking; adaptive sensor network}, peerreviewed = {Yes}, shortjournal = {SENSORS-BASEL}, title = {BATS: Adaptive Ultra Low Power Sensor Network for Animal Tracking}, type = {Article in Journal}, url = {https://www.mdpi.com/1424-8220/18/10/3343}, }
  • F. Lurz, S. Mann, R. Weigel, and A. Koelpin, "Substrate Integrated Waveguide Technology for mm-Wave Interferometric Radar Applications" in European Microwave Week (EuMW), Worshop on Substrate Integrated Technologies and Applications, Madrid, Spain, 2018. [Bibtex]
    @inproceedings{lurz2018d,
    abstract = {SIW technology shows promising approaches for mm-Wave applications, especially for radar sensors. In this workshop, a complete 61 GHz six-port radar system will be presented, and the underlying system and circuit concepts are discussed. The radio frequency frontend is realized as system on substrate in a mixed SIW-micro-strip-technology to make the systems insensitive to external interference. The individual building blocks, such as the SIW fed Vivaldi antenna design, SIW coupler and power dividers, as well as the necessary transitions to the power detectors, attenuators and the MMICs are presented. Furthermore, measurements of the individual components and the complete system are shown.

    }, author = {Lurz, Fabian and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander}, booktitle = {European Microwave Week (EuMW), Worshop on Substrate Integrated Technologies and Applications}, cris = {https://cris.fau.de/converis/publicweb/publication/200665972}, year = {2018}, month = {10}, day = {23}, eventdate = {2018-09-23/2018-09-28}, faupublication = {yes}, peerreviewed = {Yes}, title = {Substrate Integrated Waveguide Technology for mm-Wave Interferometric Radar Applications}, type = {Abstract zum Vortrag}, venue = {Madrid, Spain}, }
  • S. Schellenberger, K. Shi, M. Mai, J. P. Wiedemann, T. Steigleder, B. Eskofier, R. Weigel, and A. Koelpin, "Detecting Respiratory Effort-Related Arousals in Polysomnographic Data Using LSTM Networks" in Computing in Cardiology, MECC Maastricht, Netherlands, 2018. [Bibtex]
    @inproceedings{schellenberger2018,
    author = {Schellenberger, Sven and Shi, Kilin and Mai, Melanie and Wiedemann, Jan Philipp and Steigleder, Tobias and Eskofier, Björn and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {Computing in Cardiology},
    cris = {https://cris.fau.de/converis/publicweb/publication/202377694},
    year = {2018},
    month = {10},
    day = {23},
    eventdate = {2018-09-23/2018-09-26},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Detecting Respiratory Effort-Related Arousals in Polysomnographic Data Using LSTM Networks},
    type = {Konferenzschrift},
    venue = {MECC Maastricht, Netherlands},
    }
  • M. Wagner, T. Gossmann, J. Tomasik, R. Weigel, A. Hagelauer, and S. Leuschner, "A Hybrid Acoustic-Wave Resonator and Lumped-Element Ladder Filter" in IEEE International Ultrasonics Symposium, IUS, Kobe, Japan, 2018. [DOI] [Bibtex]
    @inproceedings{wagner2018,
    abstract = {RF frequency filters employing acoustic-wave resonators are used in common modern handsets for mobile communication. These resonators make use of the piezoelectric effect, i.e. their characteristics therefore strongly depend on employed materials and technology and comprise relatively fixed behavior. Classic filter design theory, however, is dealing with lumped reactive elements like inductors and capacitors for the realization of any-order filter designs instead. This theoretical treatment can lead to a multitude of realizable designs which makes it in fact very generous but also complex. Furthermore, theory is well-known and resulting structures are excessively explored in practice. In this paper, a new practical approach for the combination of these two filter types, preserving their respective benefits, is presented.},
    author = {Wagner, Michael and Gossmann, Timo and Tomasik, Jakob and Weigel, Robert and Hagelauer, Amelie and Leuschner, Stephan},
    publisher = {IEEE Computer Society},
    booktitle = {IEEE International Ultrasonics Symposium, IUS},
    cris = {https://cris.fau.de/converis/publicweb/publication/226023774},
    year = {2018},
    month = {10},
    day = {22},
    doi = {10.1109/ULTSYM.2018.8580026},
    eventdate = {2018-10-22/2018-10-25},
    eventtitle = {2018 IEEE International Ultrasonics Symposium, IUS 2018},
    faupublication = {yes},
    issn = {1948-5719},
    journaltitle = {IEEE International Ultrasonics Symposium},
    peerreviewed = {unknown},
    title = {A Hybrid Acoustic-Wave Resonator and Lumped-Element Ladder Filter},
    venue = {Kobe, Japan},
    volume = {2018-January},
    }
  • W. Akstaller, J. Kuypers, K. Kokkonen, R. Weigel, and A. Hagelauer, "Electrothermal modeling of TC SAW filter" in IEEE International Ultrasonics Symposium, Kobe, Japan, 2018. [Bibtex]
    @inproceedings{akstaller2018,
    author = {Akstaller, Wolfgang and Kuypers, Jan and Kokkonen, Kimmo and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {IEEE International Ultrasonics Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/202248853},
    year = {2018},
    month = {10},
    day = {22},
    eventdate = {2018-10-22/2018-10-25},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Electrothermal modeling of TC SAW filter},
    type = {Journal Article},
    venue = {Kobe, Japan},
    }
  • J. Kirchner, M. Arnold, and G. Fischer, "Analysis of the Movement of ICD Leads During Cardiac Contraction as Determinant of Intracardiac Impedance" in 2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Honolulu, HI, USA, 2018. [DOI] [Bibtex]
    @inproceedings{kirchner2018b,
    abstract = {Intracardiac impedance (ICI) has been proposed as an indicator of cardiac status in heart failure patients. We introduce a biophysical model of the measurement setup and apply it to the movement of ICD leads reconstructed from clinical-routine X-ray recordings in a study population of 12 patients. Tilting of the right ventricular lead is found to be a major determinant of ICI changes during cardiac contraction with a mean contribution of 42+-23%. The relative position between right and left ventricular lead is the second major contributor (40+-22%).
    However, the contributions of the components of movement strongly differ between the patients.
    The proposed method provides means for a better interpretation of ICI measurements and for an improvement of its performance for monitoring heart failure status.}, author = {Kirchner, Jens and Arnold, Martin and Fischer, Georg}, language = {English}, booktitle = {2018 40th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)}, cris = {https://cris.fau.de/converis/publicweb/publication/111732544}, year = {2018}, month = {10}, day = {29}, doi = {10.1109/EMBC.2018.8512960}, eventdate = {2018-07-18/2018-07-21}, faupublication = {yes}, isbn = {9781538636466}, issn = {1558-4615}, peerreviewed = {Yes}, title = {Analysis of the Movement of ICD Leads During Cardiac Contraction as Determinant of Intracardiac Impedance}, type = {Journal Article}, venue = {Honolulu, HI, USA}, }
  • V. Chauhan, M. Mayer, W. Ruile, K. Wagner, R. Weigel, and A. Hagelauer, "P-matrix model for third order electric and acoustic nonlinearities in TC-SAW devices" in IEEE International Ultrasonics Symposium, Kobe, Japan, 2018. [Bibtex]
    @inproceedings{chauhan2018d,
    author = {Chauhan, Vikrant and Mayer, Markus and Ruile, Werner and Wagner, Karl and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {IEEE International Ultrasonics Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/200126234},
    year = {2018},
    month = {10},
    day = {21},
    eventdate = {2018-10-21/2018-10-26},
    eventtitle = {IEEE International Ultrasonics Symposium},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {P-matrix model for third order electric and acoustic nonlinearities in TC-SAW devices},
    type = {Journal Article},
    venue = {Kobe, Japan},
    }
  • V. Chauhan, M. Mayer, W. Ruile, K. Wagner, A. Mayer, R. Weigel, and A. Hagelauer, "A nonlinear FEM model to calculate third harmonics and intermodulation in TC-SAW devices" in IEEE International Ultrasonics Symposium, Kobe, Japan, 2018, pp. 1-4. [Bibtex]
    @inproceedings{chauhan2018c,
    author = {Chauhan, Vikrant and Mayer, Markus and Ruile, Werner and Wagner, Karl and Mayer, Andreas and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {IEEE International Ultrasonics Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/200125873},
    year = {2018},
    month = {10},
    day = {21},
    eventdate = {2018-10-21/2018-10-26},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {A nonlinear FEM model to calculate third harmonics and intermodulation in TC-SAW devices},
    type = {Journal Article},
    venue = {Kobe, Japan},
    }
  • P. Schmidbauer, M. Wojnowski, R. Weigel, and A. Hagelauer, "Wafer Level Package Integrated Antenna Concepts for Circular Polarization" in 2018 IEEE 27th Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS), San Jose, CA, USA, 2018, pp. 285-287. [DOI] [Bibtex]
    @inproceedings{schmidbauer2018,
    abstract = {We prove design concepts for embedded wafer level ball grid array package integrated circularly polarized antennas in the 57 GHz to 64 GHz ISM band. Therefore, we propose performance requirements and evaluate the properties of four different antenna-in-package layouts based on electromagnetic full-wave simulations with focus on the axial ratio characteristics.},
    author = {Schmidbauer, Philipp and Wojnowski, Maciej and Weigel, Robert and Hagelauer, Amelie},
    editor = {IEEE},
    language = {English},
    booktitle = {2018 IEEE 27th Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/209731124},
    year = {2018},
    month = {10},
    day = {14},
    doi = {10.1109/EPEPS.2018.8534303},
    eventdate = {2018-10-14/2018-10-17},
    eventtitle = {27th Conference on Electrical Performance of Electronic Packaging and Systems (EPEPS)},
    faupublication = {yes},
    keywords = {ball grid arrays;electromagnetic wave polarisation;millimetre wave antennas;wafer level packaging;antenna-in-package layouts;ISM band;electromagnetic full-wave simulations;axial ratio characteristics;circularly polarized antennas;embedded wafer level ball grid array package;design concepts;circular polarization;wafer level package integrated antenna concepts;frequency 57 GHz to 64 GHz;Patch antennas;Bandwidth;Polarization;Antenna feeds;Layout;antenna-in-package;mm-wave packaging;heterogeneous integration},
    pages = {285--287},
    peerreviewed = {unknown},
    title = {Wafer Level Package Integrated Antenna Concepts for Circular Polarization},
    type = {Konferenzschrift},
    venue = {San Jose, CA, USA},
    }
  • M. Unterreitmeier, O. Nagler, L. Pfitzner, R. Weigel, and R. Holmer, "An acoustic emmission sensor system for thin layer crack detection" in 29th European Symposium on Reliability of Electron Devices, Failure Physics and Analysis, Aalborg, Denmark, 2018. [Bibtex]
    @inproceedings{unterreitmeier2018,
    author = {Unterreitmeier, Marianne and Nagler, Oliver and Pfitzner, Lothar and Weigel, Robert and Holmer, Rainer},
    booktitle = {29th European Symposium on Reliability of Electron Devices, Failure Physics and Analysis},
    cris = {https://cris.fau.de/converis/publicweb/publication/206196956},
    year = {2018},
    month = {10},
    day = {01},
    eventdate = {2018-10-01/2018-10-05},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {An acoustic emmission sensor system for thin layer crack detection},
    type = {Journal Article},
    venue = {Aalborg, Denmark},
    }
  • A. Hagelauer, G. Fattinger, C. Ruppel, M. Ueda, K. Hashimoto, and A. Tag, "Microwave Acoustic Wave Devices: Recent Advances on Architectures, Modeling, Materials, and Packaging", IEEE Transactions on Microwave Theory and Techniques, vol. 66, iss. 10, pp. 4548-4562, 2018. [DOI] [Bibtex]
    @article{hagelauer2018b,
    author = {Hagelauer, Amelie and Fattinger, Gernot and Ruppel, Clemens and Ueda, Masanori and Hashimoto, Ken-ya and Tag, Andreas},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/200639703},
    year = {2018},
    month = {10},
    day = {05},
    doi = {10.1109/TMTT.2018.2854160},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {10},
    pages = {4548--4562},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Microwave Acoustic Wave Devices: Recent Advances on Architectures, Modeling, Materials, and Packaging},
    type = {Review article},
    volume = {66},
    }
  • D. Anzai, I. Balasingham, G. Fischer, and J. Wang, "Reliable and High-Speed Implant Ultra Wideband Communications with Transmit-Receive Diversity" in EAI/Springer Innovations in Communication and Computing(15427), Oulu, Finland, 2018. [Bibtex]
    @inproceedings{anzai2018,
    author = {Anzai, Daisuke and Balasingham, Ilangko and Fischer, Georg and Wang, Jianqing},
    editor = {EAI},
    language = {English},
    publisher = {Springer},
    booktitle = {EAI/Springer Innovations in Communication and Computing(15427)},
    cris = {https://cris.fau.de/converis/publicweb/publication/219222191},
    year = {2018},
    month = {10},
    day = {02},
    eventdate = {2018-10-02/2018-10-03},
    eventtitle = {BODYNETS 2018, the 13th EAI International Conference on Body Area Networks},
    faupublication = {yes},
    keywords = {BAN,BAC},
    peerreviewed = {Yes},
    title = {Reliable and High-Speed Implant Ultra Wideband Communications with Transmit-Receive Diversity},
    type = {Konferenzschrift},
    venue = {Oulu, Finland},
    }
  • A. Ali, G. Fischer, F. Burkhardt, and M. Breiling, "Comparison of Various Hardware Architectures for the Shared UE-Side Distributed Antenna Component" in 2018 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) - Workshop: 5G and Spectrum Sharing (5G Spectrum), Seoul, South Korea, Korea (Republic of), 2018. [Bibtex]
    @inproceedings{ali2018,
    abstract = {Shared UE-side Distributed Antenna System (SUDAS) is a very promising technique in order to deliver an improved coverage and high throughput beyond 10 Gbit/s to the users in the indoor and intra-vehicular scenarios for 5G applications. This paper presents an implementation perspective and comparison analysis of different candidate hardware architectures suitable for the Shared UE-side Distributed Antenna Component (SUDAC), which is the main building block of the SUDAS and acts as a relay and performs massive spatialto-frequency domain translation and vice versa. Based on the defined comparison criteria and scoring of different architectures, it has been established that Analog SUDAC with Slight Frequency Shifting (SFS), Analog SUDAC with Digital Control, Digital SUDAC with 802.11ad and Digital SUDAC with Frequency Domain Equalization (FDE) are the top candidates for hardware implementation and future deployment. 
    }, author = {Ali, Arslan and Fischer, Georg and Burkhardt, Frank and Breiling, Marco}, language = {English}, booktitle = {2018 IEEE International Symposium on Dynamic Spectrum Access Networks (DySPAN) - Workshop: 5G and Spectrum Sharing (5G Spectrum)}, cris = {https://cris.fau.de/converis/publicweb/publication/206149331}, year = {2018}, month = {10}, day = {22}, eventdate = {2018-10-22/2018-10-25}, faupublication = {yes}, keywords = {5G mobile communication,frequency domain equalization,mmWave communication,relay communication,transceiver architectures,virtual MIMO}, peerreviewed = {unknown}, title = {Comparison of Various Hardware Architectures for the Shared UE-Side Distributed Antenna Component}, type = {Konferenzschrift}, venue = {Seoul, South Korea, Korea (Republic of)}, }
  • M. Frank, T. Reißland, F. Lurz, M. Völkel, F. Lambrecht, S. Kiefl, P. Ghesquiere, H. Ng, D. Kissinger, R. Weigel, and A. Koelpin, "Antenna and Package Design for 61 GHz and 122 GHz Radar Sensors in Embedded Wafer-Level Ball Grid Array Technology", IEEE Transactions on Microwave Theory and Techniques, vol. 66, iss. 12, pp. 5156-5168, 2018. [DOI] [Bibtex]
    @article{frank2018b,
    author = {Frank, Martin and Reißland, Torsten and Lurz, Fabian and Völkel, Matthias and Lambrecht, Franziska and Kiefl, Stefan and Ghesquiere, Pol and Ng, Herman and Kissinger, Dietmar and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Transactions on Microwave Theory and Techniques},
    cris = {https://cris.fau.de/converis/publicweb/publication/202229247},
    year = {2018},
    month = {10},
    day = {30},
    doi = {10.1109/TMTT.2018.2873368},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {12},
    pages = {5156--5168},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Antenna and Package Design for 61 GHz and 122 GHz Radar Sensors in Embedded Wafer-Level Ball Grid Array Technology},
    type = {Article in Journal},
    volume = {66},
    }
  • L. Grebenstein, J. Kirchner, R. Stavracakis Peixoto, W. Zimmermann, F. Irnstorfer, W. Wicke, A. Ahmadzadeh, V. Jamali Kooshkghazi, G. Fischer, R. Weigel, A. Burkovski, and R. Schober, "Biological Optical-to-Chemical Signal Conversion Interface: A Small-scale Modulator for Molecular Communications", IEEE Transactions on Nanobioscience, vol. 18, iss. 1, pp. 31-42, 2018. [DOI] [Bibtex]
    @article{grebenstein2018,
    abstract = {Although many exciting applications of molecular communication (MC) systems are envisioned to be at microscale, the MC testbeds reported in the literature so far are mostly at macroscale. This may partially be due to the fact that controlling an MC system at microscale is challenging. To link the macroworld to the microworld, we propose and demonstrate a biological signal conversion interface that can also be seen as a microscale modulator. In particular, the proposed interface transduces an optical signal, which is controlled using a light-emitting diode (LED), into a chemical signal by changing the pH of the environment. The modulator is realized using Escherichia coli bacteria as microscale entity expressing the light-driven proton pump gloeorhodopsin from Gloeobacter violaceus. Upon inducing external light stimuli, these bacteria locally change their surrounding pH level by exporting protons into the environment. To verify the effectiveness of the proposed optical-to-chemical signal converter, we analyze the pH signal measured by a pH sensor, which serves as receiver. We develop an analytical parametric model for the induced chemical signal as a function of the applied optical signal. Using this model, we derive a training-based channel estimator which estimates the parameters of the proposed model to fit the measurement data based on a least square error approach. We further derive the optimal maximum likelihood detector and a suboptimal low-complexity detector to recover the transmitted data from the measured received signal. It is shown that the proposed parametric model is in good agreement with the measurement data. Moreover, for an example scenario, we show that the proposed setup is able to successfully convert an optical signal representing a sequence of binary symbols into a chemical signal with a bit rate of 1 bit/min and recover the transmitted data from the chemical signal using the proposed estimation and detection schemes. The proposed modulator may form the basis for future MC testbeds and applications at microscale. 
    }, author = {Grebenstein, Laura and Kirchner, Jens and Stavracakis Peixoto, Renata and Zimmermann, Wiebke and Irnstorfer, Florian and Wicke, Wayan and Ahmadzadeh, Arman and Jamali Kooshkghazi, Vahid and Fischer, Georg and Weigel, Robert and Burkovski, Andreas and Schober, Robert}, language = {English}, booktitle = {5th ACM International Conference on Nanoscale Computing and Communication 2018}, cris = {https://cris.fau.de/converis/publicweb/publication/203247813}, year = {2018}, month = {09}, day = {18}, doi = {10.1109/TNB.2018.2870910}, eventdate = {2018-09-05/2018-09-07}, faupublication = {yes}, issn = {1536-1241}, journaltitle = {IEEE Transactions on Nanobioscience}, keywords = {Microorganisms; Protons; Biomedical optical Imaging; Optical pumping; Optical Receivers; Optical sensors; Chemicals}, number = {1}, pages = {31--42}, peerreviewed = {Yes}, shortjournal = {IEEE T NANOBIOSCI}, title = {Biological Optical-to-Chemical Signal Conversion Interface: A Small-scale Modulator for Molecular Communications}, type = {Article in Journal}, venue = {Reykjavik, Iceland}, volume = {18}, }
  • J. Kirchner and G. Fischer, "Vital Sign Sensors for Artificial Intelligence and Deep Learning" in 52nd Annual Conference of the German Society for Biomedical Engineering, Aachen, Germany, 2018. [Bibtex]
    @inproceedings{kirchner2018a,
    abstract = {Up to now vital data of patients are mostly acquired during clinical or ambulant examination. Here, the sensors are carefully placed by trained personal and movements of the patient are well controlled, e.g. during exercise ECG on a recumbent ergometer. In this way, misplacement of the sensors as well as motion artifacts are avoided, and physical load is well defined, such that high quality data is ensured that can be use for diagnostic purposes.
    Such a clinical or ambulant examination, however, captures only a short moment in time and is not representative for daily life. More preferable from the perspective of the treating physician would be data collected on a regular basis from daily routine work of the subjects. In such a situation, however, sensors may not be placed properly by the patient and movements are not well controlled any more, so data quality can be compromised.
    Hence, the validity of the sensor data has to be assessed and taken into account during data analysis in order to derive reasonable conclusions. Therefore, a wearable sensor system for daily life must be multimodal to allow machine learning algorithms to clean the acquired sensor data from artefacts. Artificial intelligence and deep learning system can then identify corrupt data segments, substract artefact patterns and by that clean up sensor data.
    The talk will highlight the trade-off between usability and integratability of a sensor system into daily life versus the validity of data obtained. This challenge will be illustrated by a multimodal sensor platform for elderly and dementia care that was developed during the course of the Medical Valley excellence cluster funded by German Federal Ministry of Education and Research (BMBF).
    Another example discussed in the talk are ECG circuit concepts that make the sensor more robust and compatible with daily life. Special focus will be put on capacitive ECG. Here, movement artefacts can be cleaned up if the movement during ECG aquisition is known, which can be done, e.g., by EMG or acceleration/gyroscopic sensors. Apart from that, these sensors allow to interpret the captured ECG data with respect to the current load to the body and thus provide context
    information.
    In conclusion, a combination of advancements in both sensor hardware/circuitry and multimodal sensor processing by artificial intellifence is needed to make the sketched vision real.
    }, author = {Kirchner, Jens and Fischer, Georg}, language = {English}, booktitle = {52nd Annual Conference of the German Society for Biomedical Engineering}, cris = {https://cris.fau.de/converis/publicweb/publication/203247152}, year = {2018}, month = {09}, day = {26}, eventdate = {2018-09-26/2018-08-28}, faupublication = {yes}, keywords = {Vital signs; artificial intelligence; deep learning}, peerreviewed = {Yes}, title = {Vital Sign Sensors for Artificial Intelligence and Deep Learning}, type = {Abstract zum Vortrag}, venue = {Aachen, Germany}, }
  • B. Gäde, M. Amon, G. Fischer, and R. Müller, "Sensitivity Analysis of Outphasing Elements for Hybrid Analogue Digital Beamforming and Single-RF MIMO" in KleinheubacherTagung 2018, Miltenberg, 2018. [Bibtex]
    @inproceedings{gaede2018b,
    author = {Gäde, Bernhard and Amon, Michael and Fischer, Georg and Müller, Ralf},
    booktitle = {KleinheubacherTagung 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/211434090},
    year = {2018},
    month = {09},
    day = {24},
    eventdate = {2018-09-24/2018-09-26},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Sensitivity Analysis of Outphasing Elements for Hybrid Analogue Digital Beamforming and Single-RF MIMO},
    type = {Konferenzschrift},
    venue = {Miltenberg},
    }
  • J. Kirchner, N. Ebel, S. Kinner, G. Fischer, S. Werner, D. W. Schubert, and M. Weyand, "Inductive transcutaneous energy transfer for cardiac assist devices – pushing the limits" in 22. Chirurgische Forschungstage, Erlangen, Germany, 2018. [Bibtex]
    @inproceedings{kirchner2018,
    abstract = {Background / Purpose
    Power supply is an essential component of active implants. To provide energy across the skin barrier, inductive energy transfer is well established in low-power devices like Cochlea implants. However, current designs are not applicable to high-power implants like cardiac assist devices due to strong tissue heating, caused by local spots of high magnetic field strength associated with large heat dissipation. Here, we propose a system design that overcomes this problem.

    Methods
    To avoid the “hot spots”, the magnetic field is guided and thus homogenized by composite coil cores based on liquid silicon rubber (LSM), which permits to design appropriate gradients of permeability. Furthermore, the frequency is kept below 1 MHz to reduce dielectric losses within the body. LSM is a biocompatible material, whose flexibility allows adaption to the body surface to minimize the gap between extracorporeal and implanted coil. For analysis and optimization of coil and coil core design, the FEM software COMSOL Multiphysics® 5.3 was used.

    Results
    The simulations showed that with the proposed coil and coil core design the magnetic fields can be homogenized such that 24 W can be transferred with an efficiency of 98.8% and a temperature increase in the tissue of only 0.8°C.

    Conclusions
    These findings suggest the possibility to make inductive energy transfer applicable also for high‑power active implants such as ventricular assist devices, reducing the number of complications of VAD-patients.}, author = {Kirchner, Jens and Ebel, Nina and Kinner, Sarah and Fischer, Georg and Werner, Siegfried and Schubert, Dirk W. and Weyand, Michael}, language = {English}, booktitle = {22. Chirurgische Forschungstage}, cris = {https://cris.fau.de/converis/publicweb/publication/203249510}, year = {2018}, month = {09}, day = {06}, eventdate = {2018-09-06/2018-09-08}, faupublication = {yes}, keywords = {Inductive energy transfer; transcutaneous energy transfer; cardiac assist device}, peerreviewed = {Yes}, title = {Inductive transcutaneous energy transfer for cardiac assist devices – pushing the limits}, type = {Abstract zum Poster}, venue = {Erlangen, Germany}, }
  • B. Scheiner, F. Lurz, F. Michler, S. Linz, R. Weigel, and A. Koelpin, "Six-Port Based Multitone and Low-Power Radar System for Waveguides in Smart Factories" in Proceedings of the 48th European Microwave Conference, Madrid, Spain, 2018, pp. 1065-1068. [DOI] [Bibtex]
    @inproceedings{scheiner2018b,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Proceedings of the 48th European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/111656644},
    year = {2018},
    month = {09},
    day = {27},
    doi = {10.23919/EUMC.2018.8541518},
    eventdate = {2018-09-25/2018-09-27},
    eventtitle = {European Microwave Conference (EuMC)},
    faupublication = {yes},
    pages = {1065--1068},
    peerreviewed = {unknown},
    title = {Six-Port Based Multitone and Low-Power Radar System for Waveguides in Smart Factories},
    type = {Konferenzschrift},
    venue = {Madrid, Spain},
    }
  • I. Lau, M. Frank, K. Shi, F. Lurz, A. Talai, R. Weigel, and A. Koelpin, "An Accurate Free Space Method for Material Characterization in W-Band Using Material Samples with Two Different Thicknesses" in European Microwave Conference (EuMC), Madrid, Spain, 2018, pp. 202-205. [DOI] [Bibtex]
    @inproceedings{lau2018a,
    abstract = {This paper presents an accurate free space method for material characterization eliminating the problem
    of the required precise orientation between the material and the antennas and expanding the unambiguous range for electrical thick samples. It includes theoretical considerations and measurement results of four different materials. Overall, a maximum measurement uncertainty of 0.0153 for the relative permittivity and 0.001 for the loss tangent in the W-band can be achieved. Depending on the variation of the material’s thickness, the implemented setup changes lead to an reduction of the measurement uncertainty of 8 to 58%.
    }, author = {Lau, Isabella and Frank, Martin and Shi, Kilin and Lurz, Fabian and Talai, Armin and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {European Microwave Conference (EuMC)}, cris = {https://cris.fau.de/converis/publicweb/publication/200562733}, year = {2018}, month = {09}, day = {25}, doi = {10.23919/EUMC.2018.8541437}, eventdate = {2018-09-25/2018-09-27}, faupublication = {yes}, keywords = {permittivity,dielectric materials,microwave measurement,materials nondestructive testing}, pages = {202--205}, peerreviewed = {unknown}, title = {An Accurate Free Space Method for Material Characterization in W-Band Using Material Samples with Two Different Thicknesses}, type = {Konferenzschrift}, url = {https://ieeexplore.ieee.org/document/8541437}, venue = {Madrid, Spain}, }
  • G. Fischer, "A summary of the Stratix Report “Digitisation of Wireless Microphones”" in International Broadcast Convention (IBC) Conference, Amsterdam, Netherlands, 2018. [Bibtex]
    @inproceedings{fischer2018h,
    author = {Fischer, Georg},
    language = {English},
    booktitle = {International Broadcast Convention (IBC) Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/204043564},
    year = {2018},
    month = {09},
    day = {17},
    eventdate = {2018-09-12/2018-09-16},
    faupublication = {yes},
    keywords = {PMSE,Digitisation,spectrum,compression,source coding},
    peerreviewed = {Yes},
    title = {A summary of the Stratix Report “Digitisation of Wireless Microphones”},
    type = {Konferenzschrift},
    url = {https://apwpt.org/downloads/ibc2018_stratix_report.pdf},
    venue = {Amsterdam, Netherlands},
    }
  • S. Linz, F. Lurz, R. Weigel, and A. Koelpin, "Ultra-short-range radar for precise industrial positioning" in Kleinheubacher Tagung 2018, Miltenberg, Germany, 2018. [Bibtex]
    @inproceedings{linz2018a,
    author = {Linz, Sarah and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {Kleinheubacher Tagung 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/202236429},
    year = {2018},
    month = {09},
    day = {24},
    eventdate = {2018-09-24/2018-09-26},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Ultra-short-range radar for precise industrial positioning},
    type = {Abstract zum Vortrag},
    venue = {Miltenberg, Germany},
    }
  • T. Mai, A. Hagelauer, and R. Weigel, "Maximizing Temperature and Process Corner Performance of Operational Amplifiers with a Novel Self-Adjusting Biasing Technique" in Austrian Workshop on Microelectronics, Graz University of Technology, 2018, p. 4. [Bibtex]
    @inproceedings{mai2018,
    abstract = {A novel self-adjusting biasing technique for current sources in CMOS operational 

    amplifiers is presented.
    The method is deduced from the fundamental characteristics of a mosfet and a simple line of reasoning.
    Opamps using this technique can produce a more constant gain over process corners 
    and temperature. This is especially important under
    large-signal conditions, when the output 
    is near one of the supply rails or a large current needs to be driven. 
    Therefore it reduces worst case distortion in a given Opamp circuit that uses feedback
    over temperature and process corners.
    It is also capable of driving low-$V_t$-devices that typically exhibit less noise, increasing
    the achievable noise performance of the Opamp almost without additional current consumption.
    The method was implemented and simulated in tsmc 180 nm CMOS. 
    Simulation results are presented that clearly show the increased performance compared 
    to the state of the art.

    },
    author = {Mai, Timo and Hagelauer, Amelie and Weigel, Robert},
    language = {English},
    booktitle = {Austrian Workshop on Microelectronics},
    cris = {https://cris.fau.de/converis/publicweb/publication/208516281},
    year = {2018},
    month = {09},
    day = {27},
    eventdate = {2018-09-27/2018-09-27},
    faupublication = {yes},
    keywords = {operational amplifier; gain boosting; adaptive biasing; monticelli; process variations},
    pages = {4},
    peerreviewed = {unknown},
    title = {Maximizing Temperature and Process Corner Performance of Operational Amplifiers with a Novel Self-Adjusting Biasing Technique},
    type = {Konferenzschrift},
    venue = {Graz University of Technology},
    }

  • F. Michler, H. Deniz, F. Lurz, R. Weigel, and A. Koelpin, "Performance Analysis of an Ultra Wideband Transceiver for Real-Time Localization" in 2018 48th European Microwave Conference (EuMC), Madrid, Spain, 2018, pp. 1141-1144. [DOI] [Bibtex]
    @inproceedings{michler2018,
    abstract = {In this paper, an ultra wideband localization system based on the DecaWave DW1000 chipset is investigated in detail regarding the achievable precision and accuracy in different measurement scenarios. System parameters, such as channel selection, bandwidth, preamble length and measurement method will be explained in detail and their influence on the localization performance is estimated. Statistically evaluated measurements in different environments with a prototype system consisting of a single anchor and a tag are then used to confirm the theory.
    }, author = {Michler, Fabian and Deniz, Harun and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {2018 48th European Microwave Conference (EuMC)}, cris = {https://cris.fau.de/converis/publicweb/publication/110644204}, year = {2018}, month = {09}, day = {27}, doi = {10.23919/EUMC.2018.8541672}, eventdate = {2018-09-25/2018-09-27}, eventtitle = {European Microwave Conference (EuMC)}, faupublication = {yes}, isbn = {9782874870514}, pages = {1141--1144}, peerreviewed = {Yes}, title = {Performance Analysis of an Ultra Wideband Transceiver for Real-Time Localization}, type = {Konferenzschrift}, venue = {Madrid, Spain}, }
  • M. Dietz, A. Bauch, K. Aufinger, R. Weigel, and A. Hagelauer, "A 1 to 32 GHz broadband multi-octave receiver for monolithic integrated vector network analyzers in SiGe technology", International Journal of Microwave and Wireless Technologies, vol. 10, iss. 5-6, pp. 717-728, 2018. [DOI] [Bibtex]
    @article{dietz2018a,
    abstract = {A multi-octave receiver chain is presented for the use in a monolithic integrated vector network
    analyzer. The receiver exhibits a very wide frequency range of 1–32 GHz, where the
    gain meets the 3 dB-criterion. The differential receiver consists of an ultra-wideband low
    noise amplifier, an active mixer and an output buffer and exhibits a maximum conversion
    gain (CG) of 16.6 dB. The main design goal is a very flat CG over five octaves, which eases
    calibration of the monolithic integrated vector network analyzer. To realize variable gain
    functionality, without losing much input matching, an extended gain control circuit with
    additional feedback branch is shown. For the maximum gain level, a matching better
    than −10 dB is achieved between 1–28 GHz, and up to 30.5 GHz the matching is better
    than −8.4 dB. For both, the input matching and the gain of the LNA, the influence of
    the fabrication tolerances are investigated. A second gain control is implemented to improve
    isolation. The measured isolations between RF-to-LO and LO-to-RF are better than 30 dB
    and 60 dB, respectively. The LO-to-IF isolation is better than 35 dB. The noise figure of
    the broadband receiver is between 4.6 and 5.8 dB for 4–32 GHz and the output referred
    1-dB-compression-point varies from 0.1 to 4.3 dBm from 2–32 GHz. The receiver draws
    a current of max. 66 mA at 3.3 V.
    }, author = {Dietz, Marco and Bauch, Andreas and Aufinger, Klaus and Weigel, Robert and Hagelauer, Amelie}, language = {English}, publisher = {Cambridge University Press}, booktitle = {International Journal of Microwave and Wireless Technologies}, cris = {https://cris.fau.de/converis/publicweb/publication/201423544}, year = {2018}, month = {09}, day = {28}, doi = {10.1017/S175907871800079X}, faupublication = {yes}, issn = {1759-0787}, journaltitle = {International Journal of Microwave and Wireless Technologies}, keywords = {active circuits; RF front-ends; ultra broadband receiver}, number = {5-6}, pages = {717--728}, peerreviewed = {Yes}, title = {A 1 to 32 GHz broadband multi-octave receiver for monolithic integrated vector network analyzers in SiGe technology}, type = {Article in Journal}, volume = {10}, }
  • D. Schrüfer, M. Ellinger, M. Jank, L. Frey, R. Weigel, and A. Hagelauer, "Circuits with Scaled Metal Oxide Technology for Future TOLAE RF Systems" in Proceedings of the 48th European Microwave Conference, Madrid, Spain, 2018, pp. 737-740. [Bibtex]
    @inproceedings{schruefer2018,
    abstract = {A novel architecture for thin-film transistors (TFT) utilising the concept of combining a staggered and a coplanar electrode in a single Alternating Contact TFT (ACTFT) is presented. It exhibits a transit frequency of 49.2MHz for a channel length of 0.6 μm at a drain and gate voltage of 2V. Based on these ACTFTs various n-channel-only digital circuits were fabricated and are presented here.
    }, author = {Schrüfer, Daniel and Ellinger, Martin and Jank, Michael and Frey, Lothar and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {Proceedings of the 48th European Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/208600826}, year = {2018}, month = {09}, day = {28}, eventdate = {2018-09-23/2018-09-28}, eventtitle = {European Microwave Conference}, faupublication = {yes}, isbn = {9782874870514}, keywords = {Thin film devices; thin film circuits; logic circuits; logic gates;}, pages = {737--740}, peerreviewed = {No}, title = {Circuits with Scaled Metal Oxide Technology for Future TOLAE RF Systems}, type = {Konferenzschrift}, venue = {Madrid, Spain}, }
  • V. Chauhan, L. W. Wandji, X. Peng, V. Silva Cortes, U. Stehr, A. Frank, R. Weigel, and A. Hagelauer, "Design and Performance of Power Amplifier Integration with BAW Filter on a Silicon-Ceramic Composite and Standard Epoxy/Glass Substrate" in IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes, Michigan, USA, 2018. [DOI] [Bibtex]
    @inproceedings{chauhan2018b,
    author = {Chauhan, Vikrant and Wandji, Lionel Wilfried and Peng, Xuejiao and Silva Cortes, Victor and Stehr, Uwe and Frank, Astrid and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes},
    cris = {https://cris.fau.de/converis/publicweb/publication/200126598},
    year = {2018},
    month = {09},
    day = {10},
    doi = {10.1109/IMWS-AMP.2018.8457140},
    eventdate = {2018-07-16/2018-04-18},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Design and Performance of Power Amplifier Integration with BAW Filter on a Silicon-Ceramic Composite and Standard Epoxy/Glass Substrate},
    type = {Konferenzschrift},
    url = {https://ieeexplore.ieee.org/document/8457140/},
    venue = {Michigan, USA},
    }
  • J. Rimmelspacher, S. Breun, A. Werthof, A. Geiselbrechtinger, R. Weigel, and V. Issakov, "Experimental Comparison of Integrated Transformers in a 28 nm Bulk CMOS Technology" in European Microwave Conference 2018, Madrid, Spain, 2018. [Bibtex]
    @inproceedings{rimmelspacher2018b,
    abstract = {This paper presents a systematic comparison of integrated transformer structures realized in a 28 nm bulk CMOS technology and characterized up to the millimetre-wave frequencies. First, the rectangular versus octagonal coil shapes are compared. Next, different transformer routing realizations using various magnetic coupling mechanisms are examined: interleaved transformers using lateral coupling, stacked ones using vertical coupling and symmetrical transformers using the combination of both coupling mechanisms. Finally, the comparison is repeated for different turn ratios: 1:1, 1:2 and 2:2. The electrical properties of the transformers, such as self-inductance, quality factor, self-resonance frequencies and mutual coupling coefficient are analysed. Advantages and disadvantages of these structures are discussed with regard to their applicability in various active circuits. One of the main targets is to obtain the best transformer’s electrical parameters for a given fixed area and given metallization option. The structures are measured up to 70 GHz. On-chip interconnects are de-embedded and the devices are compared to the models simulated by EM field solver.
    }, author = {Rimmelspacher, Johannes and Breun, Sascha and Werthof, Andreas and Geiselbrechtinger, Angelika and Weigel, Robert and Issakov, Vadim}, booktitle = {European Microwave Conference 2018}, cris = {https://cris.fau.de/converis/publicweb/publication/200127203}, year = {2018}, month = {09}, day = {25}, eventdate = {2018-09-25/2018-09-27}, faupublication = {no}, keywords = {millimeter-wave,CMOS,transformers}, peerreviewed = {unknown}, title = {Experimental Comparison of Integrated Transformers in a 28 nm Bulk CMOS Technology}, type = {Konferenzschrift}, venue = {Madrid, Spain}, }
  • J. Rimmelspacher, R. Weigel, A. Hagelauer, and V. Issakov, "60 GHz Tail-Node-Coupled Multi-Core Push-Push VCOs in 22 nm FD SOI CMOS Technology" in European Microwave Conference 2018, Madrid, Spain, 2018. [Bibtex]
    @inproceedings{rimmelspacher2018c,
    abstract = {This paper proposes a compact realization of a phase-noise (PN) improving core-coupling technique for millimetre-wave (mm-Wave) CMOS LC voltage-controlled oscillators (VCOs). The target is to provide a multi-core wideband continuous frequency-tuning-range (FTR) and low PN for FMCW radar applications while maintaining area and complexity at a minimum level. The VCO cores are superharmonic injection-locked at second harmonic (H2) on a common tail node. Three VCOs are fabricated in a 22 nm fully depleted (FD) silicon-on-insulator (SOI) CMOS technology: Single-Core, Dual-Core and Quad-Core. All implementations have the same core design. Measurements show the expected PN improvement for the multi-core VCOs compared to the single-core VCO.},
    author = {Rimmelspacher, Johannes and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    booktitle = {European Microwave Conference 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/111630244},
    year = {2018},
    month = {09},
    day = {25},
    eventdate = {2018-09-25/2018-09-27},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {60 GHz Tail-Node-Coupled Multi-Core Push-Push VCOs in 22 nm FD SOI CMOS Technology},
    venue = {Madrid, Spain},
    }
  • D. Werner, K. Bernhart, C. Eßelmann, K. Reiter, and E. Schwenzfeier-Hellkamp, "Bedarfsorientierte Beleuchtung für Mensch und Tier in der Milchviehhaltung" in 23. Europäische Lichtkongress, LICHT2018, Davos, Switzerland, 2018. [Bibtex]
    @inproceedings{werner2018b,
    author = {Werner, Daniel and Bernhart, Kristin and Eßelmann, Christian and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {23. Europäische Lichtkongress, LICHT2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/204755145},
    year = {2018},
    month = {09},
    day = {09},
    eventdate = {2018-09-09/2018-09-12},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Bedarfsorientierte Beleuchtung für Mensch und Tier in der Milchviehhaltung},
    type = {Konferenzschrift},
    venue = {Davos, Switzerland},
    }
  • S. Erhardt, B. Gäde, A. Koelpin, and R. Weigel, "Enhanced GSM Broadcast Receiver using the Phase Output of a Sub-GHz Transceiver" in 2018 48th European Microwave Conference (EuMC), Madrid, Spain, 2018, pp. 1137-1140. [DOI] [Bibtex]
    @inproceedings{erhardt2018a,
    abstract = {With Sub-GHz transceivers it is possible to receive GSM broadcast messages, for example for implementing cell-ID based localization. In this publication the phase information output of an ultra-low power Sub-GHz transceiver is used for a software defined GSM receiver. For enhanced results channel estimation and equalization can be applied.},
    author = {Erhardt, Stefan and Gäde, Bernhard and Koelpin, Alexander and Weigel, Robert},
    booktitle = {2018 48th European Microwave Conference (EuMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/200219991},
    year = {2018},
    month = {09},
    day = {25},
    doi = {10.23919/EUMC.2018.8541538},
    eventdate = {2018-09-25/2018-09-27},
    faupublication = {yes},
    keywords = {GSM;Receivers;Transceivers;Frequency modulation;Registers;Channel estimation;GSM;signal processing;channel estimation;equalizers},
    pages = {1137--1140},
    peerreviewed = {Yes},
    title = {Enhanced GSM Broadcast Receiver using the Phase Output of a Sub-GHz Transceiver},
    type = {Konferenzschrift},
    venue = {Madrid, Spain},
    }
  • T. Steigleder, A. Malessa, K. Shi, F. Michler, S. Schellenberger, M. Heckel, A. Koelpin, and C. Ostgathe, "Kontinuierliche berührungslose Erfassung von Herzschlag und Atmung als Surrogatparameter für Symptomlinderung–eine Pilotstudie", Zeitschrift für Palliativmedizin, vol. 19, iss. 05, 2018. [DOI] [Bibtex]
    @article{steigleder2018,
    abstract = {Fokus der Palliativmedizin (PM) ist die persönliche Begegnung. Häufig wird bei schwerer Krankheit auf apparative Therapie und Diagnostik verzichtet. Dennoch könnten Biomarker (BM, zB Herz-und Atemfrequenz) wichtige ergänzende Hinweise auf Symptomlast und zur individuellen Anpassung der medikamentösen Behandlung geben. Wir erforschen den innovativen Ansatz, BM mit Radartechnologie (RT) berührungs-und belastungsfrei zu erfassen. Ziel soll es ua in sein, in Zukunft die Symptomlinderung zu verbessern. RT, die auf einem interferometrischem Verfahren beruht, erfasst Herzschläge und Atmung mittels Messung der Distanzänderung zu der Radarantenne aus einigen Metern Entfernung und durch Materialen wie Kleidung oder Bettdecke hindurch. Lernende Algorithmen extrahieren die spezifischen Signale und werten sie automatisiert aus.},
    author = {Steigleder, Tobias and Malessa, Anke and Shi, Kilin and Michler, Fabian and Schellenberger, Sven and Heckel, Maria and Koelpin, Alexander and Ostgathe, Christoph},
    language = {German},
    cris = {https://cris.fau.de/converis/publicweb/publication/203858370},
    year = {2018},
    month = {08},
    doi = {10.1055/S-0038-1669350},
    faupublication = {yes},
    issn = {1615-2921},
    journaltitle = {Zeitschrift für Palliativmedizin},
    number = {05},
    peerreviewed = {No},
    title = {Kontinuierliche berührungslose Erfassung von Herzschlag und Atmung als Surrogatparameter für Symptomlinderung–eine Pilotstudie},
    type = {Article in Journal},
    url = {https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0038-1669350},
    volume = {19},
    }
  • S. Zarei, W. Gerstacker, R. Weigel, M. Vossiek, and R. Schober, "Robust MSE-Balancing Hierarchical Linear/Tomlinson-Harashima Precoding for Downlink Massive MU-MIMO Systems", IEEE Transactions on Wireless Communications, vol. 17, iss. 11, pp. 7309-7324, 2018. [DOI] [Bibtex]
    @article{zarei2018,
    abstract = {In this paper, we propose a robust minimum maximum mean square error Tomlinson-Harashima precoding (Min-Max-MSE THP) scheme and a low-complexity robust Min-Max-MSE hierarchical linear/THP (HL-THP) scheme for downlink massive multiuser multiple-input-multiple-output (MU-MIMO) systems with imperfect channel state information (CSI) at the transmitter. The proposed robust Min-Max-MSE HL-THP scheme comprises an inner linear beamformer (BF), which is designed based on second-order CSI statistics, and outer THP modules, which exploit the instantaneous overall CSI of the cascade of the actual channel and the inner BF. Thereby, the user terminals are divided into groups, where for each group a THP module successively mitigates the intra-group interference, whereas the inter-group interference is canceled by the inner BF. To ensure fairness, we adopt the maximization of the asymptotic signal-to-leakage-plus-noise ratio in the large system limit and the Min-Max-MSE as an optimization criterion for designing the inner BF and the per-group THP modules, respectively. Our analytical and simulation results show that the proposed robust Min-Max-MSE HL-THP scheme achieves a substantially improved performance in terms of the Max-MSE, maximum bit error rate, and minimum rate compared to linear regularized zero-forcing precoding. Moreover, the performance loss of the proposed robust Min-Max-MSE HL-THP scheme compared to the robust Min-Max-MSE THP scheme is small. In addition, our complexity analysis reveals that the proposed robust Min-Max-MSE HL-THP scheme has a much lower computational complexity than the Min-Max-MSE THP scheme. Hence, the robust Min-Max-MSE HL-THP scheme provides a favorable tradeoff between complexity and performance.},
    author = {Zarei, Shahram and Gerstacker, Wolfgang and Weigel, Robert and Vossiek, Martin and Schober, Robert},
    language = {English},
    publisher = {Institute of Electrical and Electronics Engineers (IEEE)},
    cris = {https://cris.fau.de/converis/publicweb/publication/209711758},
    year = {2018},
    month = {08},
    day = {27},
    doi = {10.1109/TWC.2018.2866112},
    faupublication = {yes},
    issn = {1536-1276},
    journaltitle = {IEEE Transactions on Wireless Communications},
    keywords = {Precoding; Robustness; Interference; Computational complexity; Optimization; Wireless communication},
    number = {11},
    pages = {7309--7324},
    peerreviewed = {Yes},
    shortjournal = {IEEE T WIREL COMMUN},
    title = {Robust MSE-Balancing Hierarchical Linear/Tomlinson-Harashima Precoding for Downlink Massive MU-MIMO Systems},
    volume = {17},
    }
  • M. Hertlein, J. Bühlmeyer, A. Elhaddad, and G. Fischer, "PMSE-xG –Wireless Communication in Mobile Networks for Programme Making and Special Events" in 2nd International Conference on Signals and Systems 2018 (ICSigSys 2018), Jalan Cemara, 80228 Sanur, Indonesia, 2018. [Bibtex]
    @inproceedings{hertlein2018b,
    abstract = {This paper provides a short overview of the
    German research and development (R&D) project PMSE-xG,
    which aims to create the prerequisites for using the next mobile
    standard for broad-band low-latency ultra-reliable connections
    (5G) especially for Programme Making and Special Events
    (PMSE). The PMSE manufacturers have so far focused on highly
    specialized, link-based solutions. This strategy was undermined
    by the fact that more and more spectrum is assigned to mobile
    communication systems like Long Term Evolution (LTE).
    Therefore, both technologies are competing for the rare
    spectrum. Working with the current standard for wireless
    communication Long Term Evolution (LTE), the PMSE-xG
    project is a first feasibility study to integrate PMSE applications
    into a mobile communication standard and aims to integrate
    these different use cases of PMSE through future projects into
    5G. Through the interaction and cooperation with different
    stakeholders from industry, research, standardization, regulation
    and users, PMSE-xG tries to achieve this. Furthermore, it will lay
    the foundations for other vertical industries in 5G and for further
    cooperation with them. Furthermore, the video demonstrator is
    introduced in this paper. Still some work has to be done but the
    goals of the project are reachable.}, author = {Hertlein, Markus and Bühlmeyer, Jonas and Elhaddad, Ahmed and Fischer, Georg}, language = {English}, booktitle = {2nd International Conference on Signals and Systems 2018 (ICSigSys 2018)}, cris = {https://cris.fau.de/converis/publicweb/publication/111034264}, year = {2018}, month = {07}, day = {01}, eventdate = {2018-05-01/2018-05-03}, faupublication = {yes}, keywords = {PMSE; SDR; LTE; 5G; low-latency; broad-band; ultra-reliable wireless communication;}, peerreviewed = {unknown}, title = {PMSE-xG –Wireless Communication in Mobile Networks for Programme Making and Special Events}, type = {Konferenzschrift}, url = {https://ieeexplore.ieee.org/document/8322594/}, venue = {Jalan Cemara, 80228 Sanur, Indonesia}, }
  • B. Gäde and G. Fischer, "CEPT SE7(18)105 Efficient frequency domain algorithms for calculation of RX Intermodulation", 2018. [Bibtex]
    @other{gaede2018a,
    author = {Gäde, Bernhard and Fischer, Georg},
    editor = {ECO},
    publisher = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201875147},
    year = {2018},
    month = {07},
    day = {18},
    faupublication = {yes},
    keywords = {RX Intermodulation,non-linear Circuit Technology,non-linear systems},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)105 Efficient frequency domain algorithms for calculation of RX Intermodulation},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • J. Lichtblau, B. Sanftl, C. Kraus, R. Weigel, and A. Koelpin, "Influence of Train Interior on Train-Onboard Communication" in 22nd International Microwave and Radar Conference (MIKON), Poznań, 2018. [DOI] [Bibtex]
    @inproceedings{lichtblau2018a,
    author = {Lichtblau, Johann and Sanftl, Benedikt and Kraus, Christian and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    language = {English},
    booktitle = {22nd International Microwave and Radar Conference (MIKON)},
    cris = {https://cris.fau.de/converis/publicweb/publication/107109244},
    year = {2018},
    month = {07},
    doi = {10.23919/MIKON.2018.8405299},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Influence of Train Interior on Train-Onboard Communication},
    type = {Konferenzschrift},
    venue = {Poznań},
    }
  • B. Gäde and G. Fischer, "CEPT SE7(18)102 Reference Values for RX Intermodulation", 2018. [Bibtex]
    @other{fischer2018,
    author = {Gäde, Bernhard and Fischer, Georg},
    editor = {ECO},
    language = {English},
    publisher = {CEPT},
    cris = {https://cris.fau.de/converis/publicweb/publication/201423287},
    year = {2018},
    month = {07},
    day = {03},
    faupublication = {yes},
    keywords = {Receiver Intermodulation,RX non-linearity,IIP3},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)102 Reference Values for RX Intermodulation},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/?flid=8409},
    }
  • I. Lau, F. Michler, A. Talai, R. Weigel, and A. Koelpin, "A Resonant Substrate Integrated Waveguide Measurement System for True Relative Permittivity Extraction of PCB Materials up to 90 GHz" in IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes (IMWS-AMP), Ann Arbor, 2018, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{lau2018,
    abstract = {This paper presents a resonant measurement method based on substrate integrated waveguide cavities for
    determination of the true relative permittivity of a PCB material. The sensor is manufactured on the unknown PCB material and in contrast to existing, comparable methods, the extraction process takes into account the metal roughness. The proposed method does not require any reference materials or sensors on different
    PCB thicknesses. This paper contains considerations regarding the design and simulation as well as measurement results of the sensor system. To validate the measurement system, the extracted relative permittivity values of the RO4350B substrate over the frequency range of 10 GHz to 90GHz are presented.
    }, author = {Lau, Isabella and Michler, Fabian and Talai, Armin and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes (IMWS-AMP)}, cris = {https://cris.fau.de/converis/publicweb/publication/200563113}, year = {2018}, month = {07}, day = {16}, doi = {10.1109/IMWS-AMP.2018.8457133}, eventdate = {2018-07-16/2018-07-18}, faupublication = {yes}, pages = {1--3}, peerreviewed = {unknown}, title = {A Resonant Substrate Integrated Waveguide Measurement System for True Relative Permittivity Extraction of PCB Materials up to 90 GHz}, type = {Konferenzschrift}, venue = {Ann Arbor}, }
  • E. Schwenzfeier-Hellkamp, D. Werner, C. Eßelmann, K. Bernhart, and K. Reiter, "Digitalisierung in der Landwirtschaft zur Steigerung des Tierwohls" in Nachhaltigkeit und Wirtschaften – in einer digitalen Welt, Bielefeld, 2018. [Bibtex]
    @inproceedings{schwenzfeier-hellkamp2018,
    author = {Schwenzfeier-Hellkamp, Eva and Werner, Daniel and Eßelmann, Christian and Bernhart, Kristin and Reiter, Klaus},
    booktitle = {Nachhaltigkeit und Wirtschaften – in einer digitalen Welt},
    cris = {https://cris.fau.de/converis/publicweb/publication/203217881},
    year = {2018},
    month = {07},
    day = {04},
    eventdate = {2018-07-04/2018-07-04},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Digitalisierung in der Landwirtschaft zur Steigerung des Tierwohls},
    type = {Konferenzschrift},
    venue = {Bielefeld},
    }
  • B. Gäde and G. Fischer, "CEPT SE7(18)106 Impact of LTE BS Activity Factor on TETRA RX Intermodulation", 2018. [Bibtex]
    @other{gaede2018,
    author = {Gäde, Bernhard and Fischer, Georg},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201691868},
    year = {2018},
    month = {07},
    day = {13},
    faupublication = {yes},
    keywords = {RX Intermodulation,BS activity factor},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)106 Impact of LTE BS Activity Factor on TETRA RX Intermodulation},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • R. Ciocoveanu, R. Weigel, A. Hagelauer, and V. Issakov, "Bias-switched Down-Conversion Mixer for Flicker Noise Reduction in 28-nm CMOS" in Texas Symposium on Wireless and Microwave Circuits and Systems, Waco, Texas, USA, 2018. [Bibtex]
    @inproceedings{ciocoveanu2018a,
    abstract = {This paper presents a modified Gilbert-cell mixer employing a novel biasing-scheme used to reduce the high Noise Figure, due to inherently high 1/f noise of MOS transistors. Switching the transistor from strong inversion to accumulation interferes with the self-correlation of the physical noisy process, which leads to a reduction in flicker noise. To illustrate this improvement, a comparison with a conventionally biased mixer is carried. Post-layout simulation results show that this mixer achieves a voltage conversion gain of 2.2 dB, a 1 dB compression point of 3 dBm and a 5 dB reduction in noise figure at 50 kHz, while it draws a current of 13 mA from a single 0.9 V supply. The occupied chip area is 0.5x0.94 mm². According to author’s knowledge this is the first time that bias switching technique is applied to a mixer at mm-wave frequencies.},
    author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    language = {English},
    booktitle = {Texas Symposium on Wireless and Microwave Circuits and Systems},
    cris = {https://cris.fau.de/converis/publicweb/publication/200465469},
    year = {2018},
    month = {07},
    day = {01},
    eventdate = {2018-04-05/2018-04-06},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Bias-switched Down-Conversion Mixer for Flicker Noise Reduction in 28-nm CMOS},
    type = {Konferenzschrift},
    venue = {Waco, Texas, USA},
    }
  • M. Chen, D. Anzai, J. Kirchner, G. Fischer, and J. Wang, "Development of EOG-based Input System and Study on Improving Methods of Eye Movement Detection", IEICE Transactions on Communications, vol. Title of Special Issue: Healthcare, Medical Information and Communication Technology for Safe and Secure Society, 2018. [Bibtex]
    @article{chen2018,
    author = {Chen, Minghui and Anzai, Daisuke and Kirchner, Jens and Fischer, Georg and Wang, Jianqing},
    cris = {https://cris.fau.de/converis/publicweb/publication/202231321},
    year = {2018},
    month = {07},
    day = {02},
    faupublication = {yes},
    issn = {0916-8516},
    journaltitle = {IEICE Transactions on Communications},
    keywords = {EOG},
    peerreviewed = {Yes},
    shortjournal = {IEICE T COMMUN},
    title = {Development of EOG-based Input System and Study on Improving Methods of Eye Movement Detection},
    type = {Review article},
    volume = {Title of Special Issue: Healthcare, Medical Information and Communication Technology for Safe and Secure Society},
    }
  • C. Will, K. Shi, S. Schellenberger, T. Steigleder, F. Michler, J. Fuchs, R. Weigel, C. Ostgathe, and A. Koelpin, "Radar-Based Heart Sound Detection", Scientific Reports, 2018. [DOI] [Bibtex]
    @article{will2018,
    abstract = {This paper introduces heart sound detection by radar systems, which enables touch-free and continuous monitoring of heart sounds. The proposed measurement principle entails two enhancements in modern vital sign monitoring. First, common touch-based auscultation with a phonocardiograph can be simplified by using biomedical radar systems. Second, detecting heart sounds offers a further feasibility in radar-based heartbeat monitoring. To analyse the performance of the proposed measurement principle, 9930 seconds of eleven persons-under-tests' vital signs were acquired and stored in a database using multiple, synchronised sensors: a continuous wave radar system, a phonocardiograph (PCG), an electrocardiograph (ECG), and a temperature-based respiration sensor. A hidden semi-Markov model is utilised to detect the heart sounds in the phonocardiograph and radar data and additionally, an advanced template matching (ATM) algorithm is used for state-of-the-art radar-based heartbeat detection. The feasibility of the proposed measurement principle is shown by a morphology analysis between the data acquired by radar and PCG for the dominant heart sounds S1 and S2: The correlation is 82.97 ± 11.15% for 5274 used occurrences of S1 and 80.72 ± 12.16% for 5277 used occurrences of S2. The performance of the proposed detection method is evaluated by comparing the F-scores for radar and PCG-based heart sound detection with ECG as reference: Achieving an F1 value of 92.22 ± 2.07%, the radar system approximates the score of 94.15 ± 1.61% for the PCG. The accuracy regarding the detection timing of heartbeat occurrences is analysed by means of the root-mean-square error: In comparison to the ATM algorithm (144.9 ms) and the PCG-based variant (59.4 ms), the proposed method has the lowest error value (44.2 ms). Based on these results, utilising the detected heart sounds considerably improves radar-based heartbeat monitoring, while the achieved performance is also competitive to phonocardiography.
    }, author = {Will, Christoph and Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Michler, Fabian and Fuchs, Jonas and Weigel, Robert and Ostgathe, Christoph and Koelpin, Alexander}, cris = {https://cris.fau.de/converis/publicweb/publication/202373734}, year = {2018}, month = {07}, day = {26}, doi = {10.1038/S41598-018-29984-5}, faupublication = {yes}, issn = {2045-2322}, journaltitle = {Scientific Reports}, peerreviewed = {Yes}, title = {Radar-Based Heart Sound Detection}, type = {online publication}, url = {https://www.nature.com/articles/s41598-018-29984-5}, }
  • H. Unterweger, J. Kirchner, W. Wicke, A. Ahmadzadeh, D. Ahmed, V. Jamali, C. Alexiou, G. Fischer, and R. Schober, "Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow" in 2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Kalamata, Greece, 2018. [DOI] [Bibtex]
    @inproceedings{unterweger2018a,
    abstract = {Simple and easy to implement testbeds are needed to further advance molecular communication research. To this end, this paper presents an in-vessel molecular communication testbed using magnetic nanoparticles dispersed in an aqueous suspension as they are also used for drug targeting in biotechnology. The transmitter is realized by an electronic pump for injection via a Y-connector. A second pump provides a background flow for signal propagation. For signal reception, we employ a susceptometer, an electronic device including a coil, where the magnetic particles move through and generate an electrical signal. We present experimental results for the transmission of a binary sequence and the system response following a single injection. For this flow-driven particle transport, we propose a simple parameterized mathematical model for evaluating the system Response.
    }, author = {Unterweger, Harald and Kirchner, Jens and Wicke, Wayan and Ahmadzadeh, Arman and Ahmed, Doaa and Jamali, Vahid and Alexiou, Christoph and Fischer, Georg and Schober, Robert}, editor = {IEEE}, language = {English}, booktitle = {2018 IEEE 19th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)}, cris = {https://cris.fau.de/converis/publicweb/publication/223643718}, year = {2018}, month = {06}, day = {25}, doi = {10.1109/SPAWC.2018.8446011}, eventdate = {2018-06-25/2018-06-28}, faupublication = {yes}, isbn = {9781538635124}, issn = {1948-3252}, keywords = {Electron tubes; Magnetic nanoparticles; Receivers; Molecular communication; Suspensions; Magnetic susceptibility; Transmitters}, peerreviewed = {Yes}, title = {Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow}, type = {Journal Article}, venue = {Kalamata, Greece}, }
  • J. Rimmelspacher, A. Hagelauer, R. Weigel, and V. Issakov, "A 60 GHz Push-Push Voltage-Controlled Oscillator with Adaptive Gate Biasing in 28 nm Bulk CMOS Technology" in International Microwave Symposium 2018, Philadelphia, Pennsylvania, USA, 2018. [Bibtex]
    @inproceedings{rimmelspacher2018a,
    author = {Rimmelspacher, Johannes and Hagelauer, Amelie and Weigel, Robert and Issakov, Vadim},
    booktitle = {International Microwave Symposium 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/119625704},
    year = {2018},
    month = {06},
    day = {10},
    eventdate = {2018-06-10/2018-06-15},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {A 60 GHz Push-Push Voltage-Controlled Oscillator with Adaptive Gate Biasing in 28 nm Bulk CMOS Technology},
    type = {Konferenzschrift},
    venue = {Philadelphia, Pennsylvania, USA},
    }
  • G. Fischer and B. Gäde, "CEPT SE7(18)103 Status of Seamcat IM plugin validation", 2018. [Bibtex]
    @other{fischer2018a,
    author = {Fischer, Georg and Gäde, Bernhard},
    editor = {ECO},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/201424089},
    year = {2018},
    month = {06},
    faupublication = {yes},
    keywords = {RX Intermodulation},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)103 Status of Seamcat IM plugin validation},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/?flid=8409},
    }
  • V. Issakov, A. Werthof, J. Rimmelspacher, R. Weigel, and A. Geiselbrechtinger, "Experimental Study on Crosstalk Reduction between Integrated Inductors up to Millimeter-Wave Regime" in 91st ARFTG Microwave Measurement Conference (ARFTG), Philadelphia, PA, USA, 2018. [Bibtex]
    @inproceedings{issakov2018a,
    abstract = {Amount of inductors and transformers in highly integrated mm-wave multi-channel data communication and radar transceivers is steadily increasing with the growing complexity of the chips. Driven on one hand by higher integration of phased-array transceivers, e.g., for 5G applications, yet on the other hand by the demand for cost and chip area reduction, inductors need to be placed densely close to each other. This causes unwanted interferences coupled via inductors between different parts of the integrated system, resulting in SNR degradation, reduced data rates and nonlinear distortion effects. This paper presents an experimental study on coupling between on-chip inductors and investigation of various crosstalk reduction techniques for highly integrated SoCs up to mm-wave frequencies. We compare different orientations of 8-shaped inductors and discuss a rotated version of the 8-shape coil, which provides an additional improvement of 10 dB over the entire frequency range. Two-port measurements of coupled inductors connected single-endedly are performed up to 145 GHz. Additionally, 4-port measurements are done up to 70 GHz. We propose analyzing the crosstalk mechanisms by converting the measured S-parameters into the mixed-mode representation. Test structures were realized in 28 nm bulk CMOS technology node.},
    author = {Issakov, Vadim and Werthof, Andreas and Rimmelspacher, Johannes and Weigel, Robert and Geiselbrechtinger, Angelika},
    booktitle = {91st ARFTG Microwave Measurement Conference (ARFTG)},
    cris = {https://cris.fau.de/converis/publicweb/publication/210258726},
    year = {2018},
    month = {06},
    day = {10},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Experimental Study on Crosstalk Reduction between Integrated Inductors up to Millimeter-Wave Regime},
    type = {Journal Article},
    venue = {Philadelphia, PA, USA},
    }
  • K. Shi, C. Will, R. Weigel, and A. Koelpin, "Contactless Person Identification Using Cardiac Radar Signals" in 2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Houston, Texas, USA, 2018. [DOI] [Bibtex]
    @inproceedings{shi2018a,
    abstract = {Radar systems have been researched for the use of presence detection and contactless vital sign monitoring. However, there exists no established biometrics for remote and unique person identification during such monitoring. Conventional biometrics like fingerprint or iris scan yield the disadvantage that direct contact with the person is needed. This paper explores the possibility of using cardiac radar signals as new biometric parameter for unique person identification. Measurements on different persons are performed using a 24GHz continuous wave radar system which utilizes the Six-Port technology. An advanced signal processing and classification routine is presented to perform automatic person identification. Among several classifiers, quadratic support vector machines achieve the best performance and reach an overall accuracy of up to 94.6%.},
    author = {Shi, Kilin and Will, Christoph and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/107873964},
    year = {2018},
    month = {05},
    day = {14},
    doi = {10.1109/I2MTC.2018.8409645},
    eventdate = {2018-05-14/2018-05-17},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Contactless Person Identification Using Cardiac Radar Signals},
    type = {Konferenzschrift},
    venue = {Houston, Texas, USA},
    }
  • V. Chauhan, M. Mayer, W. Ruile, K. Wagner, A. Mayer, R. Weigel, and A. Hagelauer, "Investigation on Third-Order Intermodulation Distortions due to Material Nonlinearities in TC-SAW Devices", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, 2018. [DOI] [Bibtex]
    @article{chauhan2018a,
    author = {Chauhan, Vikrant and Mayer, Markus and Ruile, Werner and Wagner, Karl and Mayer, Andreas and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/111585144},
    year = {2018},
    month = {05},
    day = {02},
    doi = {10.1109/TUFFC.2018.2832283},
    faupublication = {yes},
    issn = {0885-3010},
    journaltitle = {IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control},
    peerreviewed = {Yes},
    shortjournal = {IEEE T ULTRASON FERR},
    title = {Investigation on Third-Order Intermodulation Distortions due to Material Nonlinearities in TC-SAW Devices},
    type = {Article in Journal},
    url = {https://ieeexplore.ieee.org/document/8353434/},
    }
  • J. Bühlmeyer, M. Hertlein, and G. Fischer, "PMSE-xG – 5G for Programme Making and Special Events" in 2nd International Conference on Signals and Systems 2018 (ICSigSys 2018), Jalan Cemara, 80228 Sanur, Indonesia, 2018, p. 4. [Bibtex]
    @inproceedings{buehlmeyer2018,
    abstract = {This paper provides a short overview over the

    prerequisites for the use of 5G for Programme Making

    and Special Event (PMSE). These will be shortly discussed

    in the context of the current development of 5G and the

    German research and development (R&D) project PSMExG.

    In the project PMSE-xG different use cases of PMSE

    were examined and demonstration models will be created.

    This paper focuses on the use of 5G for broadband, low

    latency and ultra-reliable video streaming in production

    scenarios like motion picture or television studios. For a

    first attempt 4G+ software defined radio (SDR) solutions are

    used to measure the critical parameters and to emphasize

    the important aspects.

    After the abstract some general information about the

    project will be given and the project is further introduced.

    Subsequently the project partners shall be introduced. Then

    the different use cases will be presented in short. Afterwards

    the high data rate streaming will be discussed in focus. Some

    measurements with two different Software Defined Radio

    (SDR) platforms are presented then. These results will be

    discussed before the result will be summarized}, author = {Bühlmeyer, Jonas and Hertlein, Markus and Fischer, Georg}, language = {English}, booktitle = {2nd International Conference on Signals and Systems 2018 (ICSigSys 2018)}, cris = {https://cris.fau.de/converis/publicweb/publication/208572417}, year = {2018}, month = {05}, day = {01}, eventdate = {2018-05-01/2018-05-03}, faupublication = {yes}, keywords = {PMSE-xG; PMSE; 5G; LTE; 4G; SDR; USRP; MIMO; Networking; Communications}, pages = {4}, peerreviewed = {unknown}, title = {PMSE-xG – 5G for Programme Making and Special Events}, type = {Konferenzschrift}, venue = {Jalan Cemara, 80228 Sanur, Indonesia}, }

  • F. Lurz, B. Scheiner, S. Linz, R. Weigel, and A. Koelpin, "Compact PCB Delay Line for Six-Port Based Instantaneous Frequency Measurement" in 22nd International Microwave and Radar Conference (MIKON), Poznań, Poland, 2018, pp. 87-90. [DOI] [Bibtex]
    @inproceedings{lurz2018b,
    author = {Lurz, Fabian and Scheiner, Benedict and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {22nd International Microwave and Radar Conference (MIKON)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106749324},
    year = {2018},
    month = {05},
    day = {15},
    doi = {10.23919/MIKON.2018.8405343},
    eventdate = {2018-05-15/2018-05-17},
    faupublication = {yes},
    pages = {87--90},
    peerreviewed = {Yes},
    title = {Compact PCB Delay Line for Six-Port Based Instantaneous Frequency Measurement},
    type = {Konferenzschrift},
    venue = {Poznań, Poland},
    }
  • F. Lurz, T. Ostertag, B. Scheiner, R. Weigel, and A. Koelpin, "Reader Architectures for Wireless Surface Acoustic Wave Sensors", Sensors, vol. 18, iss. 1734, 2018. [DOI] [Bibtex]
    @article{lurz2018c,
    author = {Lurz, Fabian and Ostertag, Thomas and Scheiner, Benedict and Weigel, Robert and Koelpin, Alexander},
    cris = {https://cris.fau.de/converis/publicweb/publication/200233886},
    year = {2018},
    month = {05},
    day = {28},
    doi = {10.3390/S18061734},
    faupublication = {yes},
    issn = {1424-8220},
    journaltitle = {Sensors},
    number = {1734},
    peerreviewed = {Yes},
    shortjournal = {SENSORS-BASEL},
    title = {Reader Architectures for Wireless Surface Acoustic Wave Sensors},
    type = {Review article},
    url = {http://www.mdpi.com/1424-8220/18/6/1734},
    volume = {18},
    }
  • S. Linz, F. Lurz, R. Weigel, and A. Koelpin, "A Review on Six-Port Radar and Its Calibration Techniques" in 22nd International Microwave and Radar Conference (MIKON), Poznań, Poland, 2018, pp. 80-83. [DOI] [Bibtex]
    @inproceedings{linz2018,
    author = {Linz, Sarah and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {22nd International Microwave and Radar Conference (MIKON)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109241484},
    year = {2018},
    month = {05},
    day = {15},
    doi = {10.23919/MIKON.2018.8405341},
    eventdate = {2018-05-15/2018-05-17},
    faupublication = {yes},
    pages = {80--83},
    peerreviewed = {Yes},
    title = {A Review on Six-Port Radar and Its Calibration Techniques},
    type = {Konferenzschrift},
    venue = {Poznań, Poland},
    }
  • M. Hertlein, A. Kundikov, and G. Fischer, "Broadcast and Multicast In The Sector Of Several Verticals - An Evaluation Of The Current Status" in 2017 3rd IEEE International Conference on Computer and Communications (ICCC), Chengdu, China, 2018. [DOI] [Bibtex]
    @inproceedings{hertlein2018a,
    abstract = {In times of rare spectrum our generation has to think if it is useful that every service has its own spectrum. PMSE, broadcast and BOS services use different frequencies an methods to solve the current situation. Because of the upcoming 5G standard the question arises if mobile communication can support the other services or even in the end if there can be one platform for all services and can use all frequency bands with the newest technologies. In this paper we consider this question in the case of broadcasting and PMSE services. There are two excellent projects in which we simulate, measure and analyse the chances for 5G as a platform for all services. The focus lies on the Unicast and Multicast, as well as SISO and SIMO transmission modes. A simulator, which is implemented in Matlab, is used as the simulation tool. The simulation results are presented in dependence of the bit error rate over the signal to noise ratio. This allows a qualitative statement about the reception quality.},
    author = {Hertlein, Markus and Kundikov, Andriy and Fischer, Georg},
    booktitle = {2017 3rd IEEE International Conference on Computer and Communications (ICCC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/111580744},
    year = {2018},
    month = {04},
    day = {01},
    doi = {10.1109/COMPCOMM.2017.8322594},
    eventdate = {2017-12-13/2017-12-16},
    faupublication = {yes},
    keywords = {Broadcast; Mulitcast; LTE;},
    peerreviewed = {unknown},
    title = {Broadcast and Multicast In The Sector Of Several Verticals - An Evaluation Of The Current Status},
    url = {https://ieeexplore.ieee.org/document/8322594/},
    venue = {Chengdu, China},
    }
  • K. Shi, C. Will, T. Steigleder, F. Michler, R. Weigel, C. Ostgathe, and A. Koelpin, "A Contactless System for Continuous Vital Sign Monitoring in Palliative and Intensive Care" in 2018 Annual IEEE International Systems Conference (SysCon), Vancouver, Kanada, Canada, 2018. [DOI] [Bibtex]
    @inproceedings{shi2018,
    abstract = {Vital sign monitoring systems play a crucial role in the medical environment. Patients in palliative and intensive care can especially benefit from continuous observation by detecting sudden changes in health status allowing the medical staff to promptly provide intensified symptom amelioration at the end-of-life. However, machine based monitoring like electrocardiography requires the patient being permanently wired to the device. This circumstance severely restricts the independence and mobility of the patient, leading to a decrease in the quality of life. For this reason, palliative care stations currently usually avoid continuous monitoring. After a comprehensive literature survey and background research, this paper presents a novel approach by using a single radar system to perform continuous and above all contactless monitoring of respiration and heartbeat. A continuous wave radar using the Six-Port technology is introduced and its feasibility, performance and real-time capability are validated in long-term measurements on different test persons. In comparison to gold standard reference devices a correlation of 97.6% was achieved.},
    author = {Shi, Kilin and Will, Christoph and Steigleder, Tobias and Michler, Fabian and Weigel, Robert and Ostgathe, Christoph and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 Annual IEEE International Systems Conference (SysCon)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106234964},
    year = {2018},
    month = {04},
    day = {23},
    doi = {10.1109/SYSCON.2018.8369507},
    eventdate = {2018-04-23/2018-04-26},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A Contactless System for Continuous Vital Sign Monitoring in Palliative and Intensive Care},
    type = {Konferenzschrift},
    venue = {Vancouver, Kanada, Canada},
    }
  • S. Mann, C. Will, T. Reißland, F. Lurz, S. Lindner, S. Linz, R. Weigel, and A. Koelpin, "High-Precision Interferometric Radar for Sheet Thickness Monitoring", IEEE Transactions on Microwave Theory and Techniques, vol. 66, iss. 6, pp. 3153-3166, 2018. [DOI] [Bibtex]
    @article{mann2018,
    abstract = {Contact-less sensing plays an important role in today’s highly automated industrial environment, as modern sensors allow for an increased product quality in high-speed manufacturing lines. Hereby, a measurement system for sheet thickness monitoring in aluminum and steel rolling mills is presented. The presented concept is based on a differential measurement principle using two cooperating six-port radar systems. The radio frequency front-ends are designed in a high density substrate integrated waveguide technology at a frequency of 61 GHz. Furthermore, a detailed analysis of non-ideal behavior of mono-static six-port radar front-ends is presented. Moreover, the measurement principle is evaluated in a simplified measurement setup and the results are compared to previously presented theory. Finally, an overview of modern sensing technology for steel rolling mills is presented and compared to the proposed measurement system considering the important aspects, i.e. update rate, precision, and thickness limit.},
    author = {Mann, Sebastian and Will, Christoph and Reißland, Torsten and Lurz, Fabian and Lindner, Stefan and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/118145544},
    year = {2018},
    month = {04},
    day = {20},
    doi = {10.1109/TMTT.2018.2825328},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    keywords = {radar systems,interferometry,six-port circuits,microwave circuits,substrate integrated waveguide (SIW),planar waveguides},
    number = {6},
    pages = {3153--3166},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {High-Precision Interferometric Radar for Sheet Thickness Monitoring},
    type = {Article in Journal},
    volume = {66},
    }
  • L. Grebenstein, J. Kirchner, R. Stavracakis Peixoto, G. Fischer, R. Weigel, R. Schober, and A. Burkovski, "The First Cell Phone in Molecular Communications: A Pilot Model of a Biological Transmitter" in 3rd Workshop on Molecular Comunications, Ghent, Belgium, 2018. [Bibtex]
    @inproceedings{grebenstein2018a,
    abstract = {In the past years, Molecular Communications were studied mainly from a communication engineering and theoretical point of view. To design nano- to micro-sized signaling networks, reliable communication-theoretical models and experimental testbeds are still missing. Inspired by microbial cells we established an organic, molecular signal converter as a modulator for MC signals. The transmitter is a bacterial cell expressing the light-driven proton pump gloeorhodopsin. In recent test runs, we were able to send short messages encoded in a light signal and converted to pH variation with a rate of 2 bits/min with the help of living bacteria.
    }, author = {Grebenstein, Laura and Kirchner, Jens and Stavracakis Peixoto, Renata and Fischer, Georg and Weigel, Robert and Schober, Robert and Burkovski, Andreas}, booktitle = {3rd Workshop on Molecular Comunications}, cris = {https://cris.fau.de/converis/publicweb/publication/203289422}, year = {2018}, month = {04}, day = {04}, eventdate = {2018-04-04/2018-04-06}, faupublication = {yes}, peerreviewed = {Yes}, title = {The First Cell Phone in Molecular Communications: A Pilot Model of a Biological Transmitter}, type = {Konferenzschrift}, url = {https://www.molecularcommunications.eu/abstracts/MolCom_2018_paper_16.pdf}, venue = {Ghent, Belgium}, }
  • G. Fischer and A. Cwik, "CEPT SE7(18)072 Draft ECC Report on LTEin400 Annex 3 based on comments SE(18)041", 2018. [Bibtex]
    @other{fischer2018f,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201717727},
    year = {2018},
    month = {03},
    day = {29},
    faupublication = {yes},
    keywords = {RX Intermodulation},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)072 Draft ECC Report on LTEin400 Annex 3 based on comments SE(18)041},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • B. Scheiner, F. Lurz, F. Michler, S. Lindner, S. Linz, R. Weigel, and A. Koelpin, "Fast Dual-Synthesizer for Six-Port In-Situ Linearization in the 2,4 GHz ISM-Band" in German Microwave Conference, Freiburg, Germany, 2018, pp. 223-226. [DOI] [Bibtex]
    @inproceedings{scheiner2018a,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Lindner, Stefan and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/106328904},
    year = {2018},
    month = {03},
    day = {13},
    doi = {10.23919/GEMIC.2018.8335070},
    eventdate = {2018-03-12/2018-03-14},
    faupublication = {yes},
    pages = {223--226},
    peerreviewed = {unknown},
    title = {Fast Dual-Synthesizer for Six-Port In-Situ Linearization in the 2,4 GHz ISM-Band},
    type = {Konferenzschrift},
    venue = {Freiburg, Germany},
    }
  • B. Sanftl, M. Trautmann, R. Weigel, and A. Koelpin, "Fully Integrated Remote Radio Head and Improved Data Transmission for Inductive Power Transfer Systems" in 2018 IEEE Radio and Wireless Symposium (RWS), Anaheim, USA, 2018, pp. 174-177. [DOI] [Bibtex]
    @inproceedings{sanftl2018,
    author = {Sanftl, Benedikt and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/119393164},
    year = {2018},
    month = {03},
    day = {14},
    doi = {10.1109/RWS.2018.8304978},
    eventdate = {2018-01-14/2018-01-17},
    eventtitle = {Radio Wireless Week},
    faupublication = {yes},
    pages = {174--177},
    peerreviewed = {Yes},
    title = {Fully Integrated Remote Radio Head and Improved Data Transmission for Inductive Power Transfer Systems},
    type = {Konferenzschrift},
    venue = {Anaheim, USA},
    }
  • F. Trenz, R. Weigel, and A. Hagelauer, "Methods for Human Dehydration Measurement", Frequenz, vol. 72, iss. 3-4, pp. 159-166, 2018. [DOI] [Bibtex]
    @article{trenz2018,
    abstract = {The aim of this article is to give a broad overview of current methods for the identification and quantific- ation of the human dehydration level. Starting off from most common clinical setups, including vital parameters and general patients’ appearance, more quantifiable res- ults from chemical laboratory and electromagnetic meas- urement methods will be reviewed. Different analysis methods throughout the electromagnetic spectrum, ran- ging from direct current (DC) conductivity measurements up to neutron activation analysis (NAA), are discussed on the base of published results. Finally, promising techno- logies, which allow for an integration of a dehydration assessment system in a compact and portable way, will be spotted.},
    author = {Trenz, Florian and Weigel, Robert and Hagelauer, Amelie},
    cris = {https://cris.fau.de/converis/publicweb/publication/106922024},
    year = {2018},
    month = {03},
    day = {07},
    doi = {10.1515/FREQ-2018-0006},
    faupublication = {yes},
    issn = {0016-1136},
    journaltitle = {Frequenz},
    keywords = {hydration,dehydration,physiology,measurement,total body water,body composition},
    number = {3-4},
    pages = {159--166},
    peerreviewed = {Yes},
    shortjournal = {FREQUENZ},
    title = {Methods for Human Dehydration Measurement},
    type = {Review article},
    volume = {72},
    }
  • T. Buckel, S. Tertinek, T. Mayer, T. Bauernfeind, C. Wicpalek, A. Springer, R. Weigel, and T. Ussmueller, "A Highly Reconfigurable RF-DPLL Phase Modulator for Polar Transmitters in Cellular RFICs", IEEE Transactions on Microwave Theory and Techniques, vol. 66, iss. 6, pp. 2618-2627, 2018. [DOI] [Bibtex]
    @article{buckel2018,
    author = {Buckel, Tobias and Tertinek, Stefan and Mayer, Thomas and Bauernfeind, Thomas and Wicpalek, Christian and Springer, Andreas and Weigel, Robert and Ussmueller, Thomas},
    cris = {https://cris.fau.de/converis/publicweb/publication/202222879},
    year = {2018},
    month = {03},
    day = {21},
    doi = {10.1109/TMTT.2018.2811480},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {6},
    pages = {2618--2627},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {A Highly Reconfigurable RF-DPLL Phase Modulator for Polar Transmitters in Cellular RFICs},
    type = {Article in Journal},
    volume = {66},
    }
  • D. Werner, K. Reiter, M. Rogalla von Bieberstein, C. Eßelmann, K. Bernhart, and E. Schwenzfeier-Hellkamp, "Energieeffiziente Lichtregime und Beleuchtungsmanagement" in 2. BFL-Beratertagung für „Bauen, Technik und Nutztierhaltung", Landwirtschaftszentrum Eichof, Bad Hersfeld, 2018. [Bibtex]
    @inproceedings{werner2018a,
    author = {Werner, Daniel and Reiter, Klaus and Rogalla von Bieberstein, Matthias and Eßelmann, Christian and Bernhart, Kristin and Schwenzfeier-Hellkamp, Eva},
    booktitle = {2. BFL-Beratertagung für „Bauen, Technik und Nutztierhaltung"},
    cris = {https://cris.fau.de/converis/publicweb/publication/203218968},
    year = {2018},
    month = {03},
    day = {13},
    eventdate = {2018-03-13/2018-03-14},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Energieeffiziente Lichtregime und Beleuchtungsmanagement},
    type = {Konferenzschrift},
    venue = {Landwirtschaftszentrum Eichof, Bad Hersfeld},
    }
  • V. Chauhan, Y. Liang, Y. Liao, V. Silva, R. Weigel, and A. Hagelauer, "Application of X-parameters in studying nonlinearities in BAW and SAW Filters" in German Microwave Conference, Freiburg, Germany, 2018, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{chauhan2018,
    author = {Chauhan, Vikrant and Liang, Yunshi and Liao, Yucheng and Silva, Victor and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/110994444},
    year = {2018},
    month = {03},
    day = {12},
    doi = {10.23919/GEMIC.2018.8335034},
    eventdate = {2018-03-12/2018-03-14},
    eventtitle = {German Microwave Conference},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {unknown},
    title = {Application of X-parameters in studying nonlinearities in BAW and SAW Filters},
    type = {Konferenzschrift},
    url = {https://ieeexplore.ieee.org/document/8335034/},
    venue = {Freiburg, Germany},
    }
  • A. Hagelauer, W. Akstaller, C. Musolff, and R. Weigel, "X-Parameter Characterization of SAW and BAW Components - a Review" in Seventh International Symposium on Acoustic Wave Devices for Future Mobile Communication Systems, Chiba, Japan, 2018. [Bibtex]
    @inproceedings{hagelauer2018a,
    abstract = {
    This paper surveys X-Parameter based characterization
    of surface acoustic wave (SAW) and bulk acoustic wave
    (BAW) components. Due to the increased integration of frontend
    modules in mobile devices, the power density in BAW and SAW
    components rises continuously. Furthermore, the demand for
    more frequency bands is required by advanced communication
    techniques. As a result, the probability of significant nonlinear
    emissions disturbing adjacent channels increases. Thus, the
    linearity of individual frontend components becomes more and
    more important. In order to comply with spectral emission masks
    and limitations on spurious emissions imposed by standards
    and specifications, accurate modeling of the device’s response
    is required. In this paper, two measurement setups which
    are based on a nonlinear vector network analyzer (NVNA) are
    utilized in order to characterize BAW and SAW filters. A high
    dynamic range is required because of the low power levels of the
    generated higher order harmonics. Two different measurement
    setup approaches are compared to each other. The application
    of frequency selective attenuators enables an increase of the
    dynamic range by more than 40 dB.
    }, author = {Hagelauer, Amelie and Akstaller, Wolfgang and Musolff, Christian and Weigel, Robert}, language = {English}, booktitle = {Seventh International Symposium on Acoustic Wave Devices for Future Mobile Communication Systems}, cris = {https://cris.fau.de/converis/publicweb/publication/111006104}, year = {2018}, month = {03}, day = {07}, eventdate = {2018-03-06/2018-03-07}, faupublication = {yes}, peerreviewed = {No}, title = {X-Parameter Characterization of SAW and BAW Components - a Review}, type = {Konferenzschrift}, venue = {Chiba, Japan}, }
  • G. Fischer and A. Cwik, "CEPT SE7(18)058 Reaction on proposed SEAMCAT IM plugin", 2018. [Bibtex]
    @other{fischer2018e,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201715585},
    year = {2018},
    month = {03},
    day = {20},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)058 Reaction on proposed SEAMCAT IM plugin},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • N. Duda, R. Weigel, and A. Koelpin, "Enhanced Mobile Node Design for Small Size Animal Borne Wireless Sensor Nodes with Encounter Detection and Localization" in GeMiC 2018, Freiburg, Germany, 2018. [DOI] [Bibtex]
    @inproceedings{duda2018,
    author = {Duda, Niklas and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {GeMiC 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/119745824},
    year = {2018},
    month = {03},
    day = {11},
    doi = {10.23919/GEMIC.2018.8335044},
    eventdate = {2018-03-12/2018-03-14},
    faupublication = {yes},
    isbn = {9783981266887},
    peerreviewed = {Yes},
    title = {Enhanced Mobile Node Design for Small Size Animal Borne Wireless Sensor Nodes with Encounter Detection and Localization},
    type = {Konferenzschrift},
    venue = {Freiburg, Germany},
    }
  • A. Frank, V. Silva Cortes, S. Michael, A. Hagelauer, and G. Fischer, "Thermal Modeling and Measurement of a Power Amplifier Module for a Silicon-Ceramic Substrate" in German Microwave Conference, Freiburg, Germany, 2018. [DOI] [Bibtex]
    @inproceedings{frank2018a,
    author = {Frank, Astrid and Silva Cortes, Victor and Michael, Steffen and Hagelauer, Amelie and Fischer, Georg},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/119629224},
    year = {2018},
    month = {03},
    day = {12},
    doi = {10.23919/GEMIC.2018.8335033},
    eventdate = {2018-03-12/2018-03-14},
    eventtitle = {German Microwave Conference 2018},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Thermal Modeling and Measurement of a Power Amplifier Module for a Silicon-Ceramic Substrate},
    type = {Article in Journal},
    url = {https://ieeexplore.ieee.org/document/8335033/},
    venue = {Freiburg, Germany},
    }
  • A. Malessa, T. Steigleder, K. Shi, C. Will, F. Michler, A. Koelpin, and C. Ostgathe, "Neue Wege in der Palliativmedizin – Herausforderungen bei der Entwicklung einer berührungslosen, nicht-belastenden Messung von Vitalparametern" in Wissenschaftliche Arbeitstage der DGP, Göttingen, Germany, 2018. [Bibtex]
    @inproceedings{malessa2018,
    author = {Malessa, Anke and Steigleder, Tobias and Shi, Kilin and Will, Christoph and Michler, Fabian and Koelpin, Alexander and Ostgathe, Christoph},
    language = {German},
    booktitle = {Wissenschaftliche Arbeitstage der DGP},
    cris = {https://cris.fau.de/converis/publicweb/publication/107042364},
    year = {2018},
    month = {03},
    day = {09},
    eventdate = {2018-03-09/2018-03-10},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Neue Wege in der Palliativmedizin – Herausforderungen bei der Entwicklung einer berührungslosen, nicht-belastenden Messung von Vitalparametern},
    type = {Konferenzschrift},
    venue = {Göttingen, Germany},
    }
  • G. Fischer and A. Cwik, "CEPT SE7(18)052 Methodology for_assessing compatibility WB vs NB systems", 2018. [Bibtex]
    @other{fischer2018c,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201717033},
    year = {2018},
    month = {03},
    day = {09},
    faupublication = {yes},
    keywords = {Non-linear Circuits,RX Intermodulation},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)052 Methodology for_assessing compatibility WB vs NB systems},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • G. Fischer and A. Cwik, "CEPT SE7(18)054 Dependence of IM products on tone spacing and occupied bandwidth", 2018. [Bibtex]
    @other{fischer2018d,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201715915},
    year = {2018},
    month = {03},
    day = {10},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)054 Dependence of IM products on tone spacing and occupied bandwidth},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • G. Fischer and A. Cwik, "CEPT SE7(18)071 Suggestion for Effective IIP3 and Effective Selectivity", 2018. [Bibtex]
    @other{fischer2018g,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201717993},
    year = {2018},
    month = {03},
    day = {29},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)071 Suggestion for Effective IIP3 and Effective Selectivity},
    type = {anderer},
    url = {https://cept.org/Documents/se-7/42313/se7-18-071_suggestion_effiip3-_effselectivity},
    }
  • V. Silva Cortes, U. Stehr, J. Stegner, J. Nowak, M. Hein, R. Sommer, G. Fischer, and A. Hagelauer, "Multiphysical Design Methodology for the Heterogeneous Integration of an RF Receiver" in German Microwave Conference, Freiburg, Germany, 2018. [DOI] [Bibtex]
    @inproceedings{silva2018,
    author = {Silva Cortes, Victor and Stehr, Uwe and Stegner, Johannes and Nowak, Jacek and Hein, Matthias and Sommer, Ralf and Fischer, Georg and Hagelauer, Amelie},
    language = {English},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/119629004},
    year = {2018},
    month = {03},
    day = {12},
    doi = {10.23919/GEMIC.2018.8335030},
    eventdate = {2018-03-12/2018-03-14},
    eventtitle = {German Microwave Conference 2018},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Multiphysical Design Methodology for the Heterogeneous Integration of an RF Receiver},
    type = {Article in Journal},
    url = {https://ieeexplore.ieee.org/document/8335030/},
    venue = {Freiburg, Germany},
    }
  • M. Frank, P. Ghesquiere, S. Kiefl, R. Weigel, and A. Koelpin, "Design and Characterization of Antenna Arrays in eWLB Package for 61 GHz Radar Applications" in 2018 IEEE Radio and Wireless Symposium (RWS), Anaheim, CA, USA, 2018, pp. 14-17. [DOI] [Bibtex]
    @inproceedings{frank2018,
    abstract = {This paper presents the design of several two element antenna arrays in an eWLB package for 61 GHz radar applications. The antenna arrays are either formed of dipoles or folded dipoles. Different feeding structures were developed in order to match MMICs with differential or single-ended ports. Measurements of both insertion loss and radiation pattern were performed for five different antenna arrays. The measurement results are in good agreement with the previously performed simulations.},
    author = {Frank, Martin and Ghesquiere, Pol and Kiefl, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/110742104},
    year = {2018},
    month = {02},
    day = {14},
    doi = {10.1109/RWS.2018.8304933},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    keywords = {Antenna in package,dipole antenna,eWLB package,antenna array},
    pages = {14--17},
    peerreviewed = {Yes},
    title = {Design and Characterization of Antenna Arrays in eWLB Package for 61 GHz Radar Applications},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • G. Fischer and A. Cwik, "CEPT SE7(18)018 SEAMCAT Plug-in for IM Studies", 2018. [Bibtex]
    @other{fischer2018b,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201715238},
    year = {2018},
    month = {02},
    day = {13},
    faupublication = {yes},
    keywords = {RX Intermodulation},
    peerreviewed = {automatic},
    title = {CEPT SE7(18)018 SEAMCAT Plug-in for IM Studies},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • D. Werner, C. Eßelmann, M. Greif, K. Bernhart, K. Reiter, and E. Schwenzfeier-Hellkamp, "LED-Leuchten im Milchviehstall bedarfsorientiert einsetzen" in Workshop Rinderhaltung und Stallbau für Architekten, Berater und Betreuer, Landwirtschaftliches Zentrum Baden-Württemberg (LAZBW), Aulendorf, 2018. [Bibtex]
    @inproceedings{werner2018,
    author = {Werner, Daniel and Eßelmann, Christian and Greif, Maike and Bernhart, Kristin and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {Workshop Rinderhaltung und Stallbau für Architekten, Berater und Betreuer},
    cris = {https://cris.fau.de/converis/publicweb/publication/203219844},
    year = {2018},
    month = {01},
    day = {29},
    eventdate = {2018-01-29/2018-01-30},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED-Leuchten im Milchviehstall bedarfsorientiert einsetzen},
    type = {Konferenzschrift},
    venue = {Landwirtschaftliches Zentrum Baden-Württemberg (LAZBW), Aulendorf},
    }
  • C. Söll, M. Reichenbach, J. Röber, A. Hagelauer, R. Weigel, and D. Fey, "Case Study on Memristor-Based Multilevel Memories", International Journal of Circuit Theory and Applications, vol. 46, iss. 1, pp. 99-112, 2018. [DOI] [Bibtex]
    @article{soell2017,
    abstract = {In this work, the benefits of memristor-based multilevel memories are described along with their design problems. Starting with measurements of discrete actual devices, a discrete memristor based multilevel memory is developed. It uses a printed circuit board in order to connect eight packaged memristors from Bio Inspired to test a ternary Arithmetic Logic Unit (ALU) on a field programmable gate array (FPGA). These circuits are then integrated in the second proposed memory system based on a 150nm CMOS process that can be equipped with memristors on top of the metal layers. This integrated solution includes proper read-out, erase and write circuits to control real memristors, and 32x32 memristive memory cells. It is compared to a common static random-access memory (SRAM) in terms of area, computation speed and power consumption showing benefits for memory sizes bigger than 70 words. Since yield and device variations are still a big issue in memristor fabrication, methods to counter these problems are also proposed in the end. An actual implementation should offer several trimming solutions to ensure proper functionality of a prototype memory as well as a power-on calibration, until these problems are solved. The development of the presented memories is not only based on different models but also measurements done with real devices.},
    author = {Söll, Christopher and Reichenbach, Marc and Röber, Jürgen and Hagelauer, Amelie and Weigel, Robert and Fey, Dietmar},
    publisher = {Wiley Online Library},
    cris = {https://cris.fau.de/converis/publicweb/publication/108239824},
    year = {2018},
    month = {01},
    doi = {10.1002/CTA.2379},
    faupublication = {yes},
    issn = {0098-9886},
    journaltitle = {International Journal of Circuit Theory and Applications},
    keywords = {Memristor; Multi-Level Memory; Memory Interface; Memristive Computing; GRK-1773},
    number = {1},
    pages = {99--112},
    peerreviewed = {Yes},
    shortjournal = {INT J CIRC THEOR APP},
    title = {Case Study on Memristor-Based Multilevel Memories},
    type = {Article in Journal},
    volume = {46},
    }
  • V. Silva Cortes, L. Liu, U. Stehr, M. Fischer, A. Frank, V. Chauhan, M. Hein, J. Müller, R. Weigel, G. Fischer, and A. Hagelauer, "Design of a Power Amplifier Module in a Novel Silicon-Ceramic Substrate for an LTE Transmitter" in Asia Pacific Microwave Conference, Kuala Lumpar, Malaysia, 2018, pp. 448-451. [DOI] [Bibtex]
    @inproceedings{silva2017,
    abstract = {The present paper demonstrates the design of a power amplifier (PA) module on a silicon ceramic (SiCer) composite substrate. The SiCer platform combines the advantages of low temperature co-fired ceramic (LTCC) and silicon thin-film processing technology for micro-electro-mechanical systems (MEMS) in a quasi-monolithic composite substrate. The present approach provides a methodology for the design and manufacturing of a PA module that foresees further integration with MEMS modules such as switches, oscillators, and acoustic filters. Based on a co-simulation approach in a specification-compliant software and polyharmonic distortion modeling, the impact of the PA module in a long term evolution (LTE) transmitter is evaluated.},
    author = {Silva Cortes, Victor and Liu, Lian and Stehr, Uwe and Fischer, Michael and Frank, Astrid and Chauhan, Vikrant and Hein, Matthias and Müller, Jens and Weigel, Robert and Fischer, Georg and Hagelauer, Amelie},
    language = {English},
    booktitle = {Asia Pacific Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/123513984},
    year = {2018},
    month = {01},
    day = {11},
    doi = {10.1109/APMC.2017.8251477},
    eventdate = {2017-11-13/2017-11-16},
    eventtitle = {Asia Pacific Microwave Conference},
    faupublication = {yes},
    isbn = {9781538606407},
    keywords = {Power amplifier; front end; composite substrate},
    pages = {448--451},
    peerreviewed = {Yes},
    title = {Design of a Power Amplifier Module in a Novel Silicon-Ceramic Substrate for an LTE Transmitter},
    type = {Journal Article},
    url = {http://ieeexplore.ieee.org/document/8251477/},
    venue = {Kuala Lumpar, Malaysia},
    }
  • Z. Umar, F. X. Engelsberger, M. Wojnowski, A. Hagelauer, and R. Weigel, "Analysis of Low Profile Ferrite Material Based Planar Shell Core Inductor" in 2018 IEEE 20TH ELECTRONICS PACKAGING TECHNOLOGY CONFERENCE (EPTC), Singapore, Singapore, 2018, pp. 634-637. [Bibtex]
    @inproceedings{umar2018,
    author = {Umar, Zeeshan and Engelsberger, Franz Xaver and Wojnowski, Maciej and Hagelauer, Amelie and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {2018 IEEE 20TH ELECTRONICS PACKAGING TECHNOLOGY CONFERENCE (EPTC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/215878474},
    year = {2018},
    month = {01},
    day = {01},
    eventdate = {2018-12-04/2018-12-07},
    eventtitle = {20th IEEE Electronics Packaging Technology Conference (EPTC)},
    faupublication = {yes},
    pages = {634--637},
    peerreviewed = {unknown},
    title = {Analysis of Low Profile Ferrite Material Based Planar Shell Core Inductor},
    venue = {Singapore, Singapore},
    }
  • S. Schellenberger, K. Shi, T. Steigleder, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Support Vector Machine-Based Instantaneous Presence Detection for Continuous Wave Radar Systems" in 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018, pp. 1465-1467. [DOI] [Bibtex]
    @inproceedings{schellenberger2018a,
    abstract = {Instantaneous detection of missing vital signs at inpatient beds enables fast intervention for cardiac arrests.
    Using a 24 GHz bistatic radar, a fast presence detection based on a support vector machine (SVM) classifer is realized. Large body motions or even small distance deviations, such as movement of the chest induced by heartbeat or breathing, are distinguishable from the measured noise of an unoccupied bed. For classifcation two features are calculated based on windowed I and Q data. Performance is evaluated by varying window sizes from 0.2 ... 1.5 s for feature calculation and training of the SVM classifer. In the resting scenario an accuracy of 99.2% and F1-score of 99.1% with windows of 0.2 s is achieved.
    }, author = {Schellenberger, Sven and Shi, Kilin and Steigleder, Tobias and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {2018 Asia-Pacific Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/203101192}, year = {2018}, month = {01}, day = {06}, doi = {10.23919/APMC.2018.8617181}, eventdate = {2018-11-06/2018-11-09}, faupublication = {yes}, pages = {1465--1467}, peerreviewed = {Yes}, title = {Support Vector Machine-Based Instantaneous Presence Detection for Continuous Wave Radar Systems}, type = {Journal Article}, venue = {Kyoto, Japan}, }
  • E. Aguilar Mendoza, A. Hagelauer, D. Kissinger, and R. Weigel, "A Low-Power Wideband D-Band LNA in a 130 nm BiCMOS Technology for Imaging Applications" in Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, Anaheim, California, USA, 2018, pp. 27-29. [DOI] [Bibtex]
    @inproceedings{aguilar2018,
    abstract = {A Low-power D-Band Low Noise Amplifier (LNA) manufactured in a recent 130 nm SiGe BiCMOS process for imaging applications is presented. The architecture consists of an optimized 3-stage cascode amplifier which achieves a maximum gain of 32.8 dB and a gain>20 dB in the frequency range from 121 to 161 GHz with a DC power consumption of 39.6 mW. The simulated noise figure varies from 6 to 9.7 dB within the range 130 to 140 GHz. To the best of the author’s knowledge, the presented work exhibits the highest gain-bandwidth product with the lowest power consumption for a D-Band amplifier in a 130 nm SiGe technology.},
    author = {Aguilar Mendoza, Erick and Hagelauer, Amelie and Kissinger, Dietmar and Weigel, Robert},
    language = {English},
    booktitle = {Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems},
    cris = {https://cris.fau.de/converis/publicweb/publication/120458624},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/SIRF.2018.8304220},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    keywords = {D-Band; Imaging; Radiometrie; LNA,SiGe,mm-wave},
    pages = {27--29},
    peerreviewed = {unknown},
    title = {A Low-Power Wideband D-Band LNA in a 130 nm BiCMOS Technology for Imaging Applications},
    type = {Konferenzschrift},
    venue = {Anaheim, California, USA},
    }
  • B. Scheiner, S. Mann, F. Lurz, F. Michler, S. Erhardt, S. Lindner, R. Weigel, and A. Koelpin, "Microstrip-to-Waveguide Transition in Planar Form Using a Substrate Integrated Waveguide" in Radio and Wireless Symposium (RWS), 2018 IEEE, Anaheim, CA, USA, 2018, pp. 18-20. [DOI] [Bibtex]
    @inproceedings{scheiner2018,
    author = {Scheiner, Benedict and Mann, Sebastian and Lurz, Fabian and Michler, Fabian and Erhardt, Stefan and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {Radio and Wireless Symposium (RWS), 2018 IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/110064284},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/RWS.2018.8304934},
    eventdate = {2018-01-14/2018-01-17},
    eventtitle = {IEEE Radio Wireless Symposium},
    faupublication = {yes},
    pages = {18--20},
    peerreviewed = {Yes},
    title = {Microstrip-to-Waveguide Transition in Planar Form Using a Substrate Integrated Waveguide},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • J. Rimmelspacher, R. Weigel, A. Hagelauer, and V. Issakov, "30 % Frequency-Tuning-Range 60 GHz Push-Push VCO in 28 nm Bulk CMOS Technology" in Radio & Wireless Week 2018, Anaheim, California, USA, USA, 2018. [DOI] [Bibtex]
    @inproceedings{rimmelspacher2018,
    abstract = {This paper presents a 60 GHz push-push crosscoupled voltage-controlled oscillator (VCO) in 28 nm bulk CMOS technology. It achieves a continuous frequency tuning range (FTR) of 30% from 52 to 71 GHz in a single sweep. We propose coupling the fundamental harmonic from the VCO core by means of magnetic coupling via a transformer-based resonant tank. This is used instead of directly connecting the output buffers to the oscillation node. The VCO provides a phase noise in the range of -93 to -82 dBc/Hz at 1 MHz offset from carrier across the entire FTR. The measured DC power dissipation including buffers at the fundamental and second harmonic outputs does not exceed 68 mW. The circuit operates from a single supply of 0.9 V. The circuit area excluding pads is 0.15 mm2. Thanks to the achieved very wide continuous FTR, the presented VCO is suitable for FMCW radar applications that require a very fine range resolution.},
    author = {Rimmelspacher, Johannes and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    language = {English},
    booktitle = {Radio & Wireless Week 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/107729864},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/SIRF.2018.8304221},
    eventdate = {2018-01-14/2018-01-18},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {30 % Frequency-Tuning-Range 60 GHz Push-Push VCO in 28 nm Bulk CMOS Technology},
    venue = {Anaheim, California, USA, USA},
    }
  • W. Akstaller, J. Kuypers, K. Kokkonen, R. Weigel, and A. Hagelauer, "Electro-thermal Modeling of TCSAW Filter" in 2018 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS), Kobe, Japan, 2018. [Bibtex]
    @inproceedings{akstaller2018a,
    author = {Akstaller, Wolfgang and Kuypers, Jan and Kokkonen, Kimmo and Weigel, Robert and Hagelauer, Amelie},
    publisher = {IEEE},
    booktitle = {2018 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/212499845},
    year = {2018},
    month = {01},
    day = {01},
    eventdate = {2018-10-22/2018-10-25},
    eventtitle = {IEEE International Ultrasonics Symposium (IUS)},
    faupublication = {yes},
    issn = {1948-5719},
    journaltitle = {IEEE International Ultrasonics Symposium},
    peerreviewed = {unknown},
    title = {Electro-thermal Modeling of TCSAW Filter},
    venue = {Kobe, Japan},
    }
  • Y. Can and B. Steinbach, "Orthogonalization of a TVL in Disjunctive or Conjunctive Form," in Further Improvements in the Boolean Domain, B. Steinbach, Ed., Cambridge Scholars Publishing, 2018. [Bibtex]
    @inbook{can2017a,
    author = {Can, Yavuz and Steinbach, Bernd},
    editor = {Steinbach, Bernd},
    language = {English},
    publisher = {Cambridge Scholars Publishing},
    booktitle = {Further Improvements in the Boolean Domain},
    cris = {https://cris.fau.de/converis/publicweb/publication/118724584},
    year = {2018},
    month = {01},
    day = {01},
    faupublication = {no},
    isbn = {9781527503717},
    peerreviewed = {Yes},
    title = {Orthogonalization of a TVL in Disjunctive or Conjunctive Form},
    type = {Buchkapitel},
    }
  • R. Ciocoveanu, J. Rimmelspacher, R. Weigel, A. Hagelauer, and V. Issakov, "A 1.8-mW Low Power, PVT-Resilient, High Linearity, modified Gilbert-Cell Down-Conversion Mixer in 28-nm CMOS" in Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems, Anaheim, USA, 2018, pp. 19-22. [DOI] [Bibtex]
    @inproceedings{ciocoveanu2018,
    abstract = {
    This paper presents a high linearity modified Gilbert-cell mixer designed for 60-GHz applications and fabricated in a 28-nm CMOS technology. To increase the linearity of the mixer, the RF transconductance stage was removed, thereby reducing the amount of stacked transistors. We propose using a self-biasing Vth reference in the bias network to make the mixer more robust to process-voltagetemperature (PVT) variations. Measurement results show that this mixer achieves a voltage conversion gain of 4.7 dB, a 1-dB compression point of -3 dBm and a 12.3 dB noise figure, while it draws only 2 mA from a single 0.9 V supply. The occupied area on the chip is 0.35x0.68 mm2 including pads.
    }, author = {Ciocoveanu, Radu and Rimmelspacher, Johannes and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim}, language = {English}, booktitle = {Topical Meeting on Silicon Monolithic Integrated Circuits in RF Systems}, cris = {https://cris.fau.de/converis/publicweb/publication/111716704}, year = {2018}, month = {01}, day = {14}, doi = {10.1109/SIRF.2018.8304218}, eventdate = {2018-01-14/2018-01-17}, faupublication = {yes}, keywords = {Down-Conversion Mixer,High-Linearity,Low-Power,PVT Robust}, pages = {19--22}, peerreviewed = {unknown}, title = {A 1.8-mW Low Power, PVT-Resilient, High Linearity, modified Gilbert-Cell Down-Conversion Mixer in 28-nm CMOS}, type = {Konferenzschrift}, venue = {Anaheim, USA}, }
  • M. Dietz, M. Striegel, R. Weigel, and A. Hagelauer, "A New Heat-Warning-System Based on a Wireless Body Area Network for Protecting Firefighters in Indoor Operations" in IEEE Topical Conference on Wireless Sensors and Sensor Networks, Anaheim, CA, USA, 2018, pp. 34-37. [DOI] [Bibtex]
    @inproceedings{dietz2018,
    abstract = {A new Heat-Warning-System is presented to
    protect firefighters in indoor operations. With the proposed
    Heat-Warning-System, a permanent monitoring of the body
    core temperature can be done, in order to protect the
    firefighter from a collapse. Furthermore, by placing several
    temperature sensors around the thorax on particular positions,
    the relative location of dangerous heat sources can
    be estimated. For the placement of the sensor nodes, an
    empirical channel model in combination with a cuboid body
    model was used, to estimate the individual transmission path
    losses by taking into account the influence of the human body.
    Finally, the Heat-Warning-System is tested and moreover the
    locating functionality of dangerous heat sources is shown.}, author = {Dietz, Marco and Striegel, Martin and Weigel, Robert and Hagelauer, Amelie}, language = {English}, booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks}, cris = {https://cris.fau.de/converis/publicweb/publication/119597544}, year = {2018}, month = {01}, day = {14}, doi = {10.1109/WISNET.2018.8311557}, eventdate = {2018-01-14/2018-01-17}, faupublication = {yes}, pages = {34--37}, peerreviewed = {unknown}, title = {A New Heat-Warning-System Based on a Wireless Body Area Network for Protecting Firefighters in Indoor Operations}, type = {Konferenzschrift}, venue = {Anaheim, CA, USA}, }
  • S. Erhardt, F. Pflaum, R. Weigel, and A. Koelpin, "Real-Time GSM Broadcast Receiver on a Cortex-M4 Microcontroller" in Radio & Wireless Week, Anaheim, California, USA, 2018, pp. 55-58. [DOI] [Bibtex]
    @inproceedings{erhardt2018,
    abstract = {Recent microcontrollers provide enough computing power to perform signal processing while still being energy efficient and enable more flexibility than FPGAs. A fully functional GSM broadcast receiver was implemented on a Cortex-M4 microcontroller that is able to decode broadcast control channel (BCCH) messages. With several algorithmic optimizations it is able to operate in real-time in combination with a Sub-GHz transceiver as RF front-end. The timing was proven by measurements with an logic analyzer.},
    author = {Erhardt, Stefan and Pflaum, Felix and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Radio & Wireless Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/111068364},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/WISNET.2018.8311563},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    pages = {55--58},
    peerreviewed = {Yes},
    title = {Real-Time GSM Broadcast Receiver on a Cortex-M4 Microcontroller},
    type = {Konferenzschrift},
    venue = {Anaheim, California, USA},
    }
  • L. Grebenstein, J. Kirchner, R. Stavracakis Peixoto, W. Zimmermann, W. Wicke, A. Ahmadzadeh, V. Jamali, G. Fischer, R. Weigel, A. Burkovski, and R. Schober, "Biological Optical-to-Chemical Signal Conversion Interface: A Small-scale Modulator for Molecular Communications" in ACM NANOCOM 2018: 5TH ACM INTERNATIONAL CONFERENCE ON NANOSCALE COMPUTING AND COMMUNICATION, Reykjavik, ICELAND, Iceland, 2018. [DOI] [Bibtex]
    @inproceedings{grebenstein2018c,
    author = {Grebenstein, Laura and Kirchner, Jens and Stavracakis Peixoto, Renata and Zimmermann, Wiebke and Wicke, Wayan and Ahmadzadeh, Arman and Jamali, Vahid and Fischer, Georg and Weigel, Robert and Burkovski, Andreas and Schober, Robert},
    publisher = {ASSOC COMPUTING MACHINERY},
    booktitle = {ACM NANOCOM 2018: 5TH ACM INTERNATIONAL CONFERENCE ON NANOSCALE COMPUTING AND COMMUNICATION},
    cris = {https://cris.fau.de/converis/publicweb/publication/211559009},
    year = {2018},
    month = {01},
    day = {01},
    doi = {10.1145/3233188.3233203},
    eventdate = {2018-09-05/2018-09-07},
    eventtitle = {5th ACM International Conference on Nanoscale Computing and Communication (ACM NANOCOM)},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Biological Optical-to-Chemical Signal Conversion Interface: A Small-scale Modulator for Molecular Communications},
    venue = {Reykjavik, ICELAND, Iceland},
    }
  • A. Hagelauer, M. Wojnowski, K. Pressel, R. Weigel, and D. Kissinger, "Integrated Systems-in-Package: Heterogeneous Integration of Millimeter-Wave Active Circuits and Passives in Fan-Out Wafer-Level Packaging Technologies", IEEE Microwave Magazine, vol. 19, iss. 1, pp. 48-56, 2018. [DOI] [Bibtex]
    @article{hagelauer2018,
    author = {Hagelauer, Amelie and Wojnowski, Maciej and Pressel, Klaus and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/119792464},
    year = {2018},
    month = {01},
    doi = {10.1109/MMM.2017.2759558},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    keywords = {Antenna measurements;Dipole antennas;Integrated circuits;Packaging;Radio frequency;Silicon;Transceivers},
    number = {1},
    pages = {48--56},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {Integrated Systems-in-Package: Heterogeneous Integration of Millimeter-Wave Active Circuits and Passives in Fan-Out Wafer-Level Packaging Technologies},
    type = {Review article},
    volume = {19},
    }
  • M. Hertlein, S. Breun, G. Cappel, A. Schwarzmeier, F. Lurz, R. Weigel, and G. Fischer, "Evaluation of Cellular Standards for Low Data Rate Applications Regarding Power Consumption and Timing Parameters" in IEEE Radio Wireless Symposium, Anaheim, CA, USA, 2018, pp. 217-219. [DOI] [Bibtex]
    @inproceedings{hertlein2018,
    abstract = {3GPP introduced new specifications for low data rate applications, due to the IoT sector and also the enormous amount of connected devices. This standards should reduce overhead, increase coverage and reduce power consumption in addition to an increasing capacity. This paper focuses on power consumption measurements of the current existing standards e.g. LTE and makes a comparison with the new Narrowband-IoT standards. Also an evaluation on timing parameters and different modes during the transmission is given. Finally this paper helps to decide which standard provides the best benefit for a certain application.},
    author = {Hertlein, Markus and Breun, Sascha and Cappel, Germar and Schwarzmeier, Andre and Lurz, Fabian and Weigel, Robert and Fischer, Georg},
    language = {English},
    booktitle = {IEEE Radio Wireless Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/111580524},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/RWS.2018.8304991},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    keywords = {Cellular networks,Internet of Things (IoT),Narrowband IoT,Power consumption},
    pages = {217--219},
    peerreviewed = {unknown},
    title = {Evaluation of Cellular Standards for Low Data Rate Applications Regarding Power Consumption and Timing Parameters},
    type = {Konferenzschrift},
    url = {https://ieeexplore.ieee.org/document/8304991/},
    venue = {Anaheim, CA, USA},
    }
  • A. Koelpin and J. Budroweit, "Design challenges of a highly integrated SDR platform for multiband spacecraft applications in radiation enviroments" in 2018 IEEE Topical Workshop on Internet of Space (TWIOS), Anaheim, CA, USA, 2018, pp. 9-12. [DOI] [Bibtex]
    @inproceedings{koelpin2018,
    abstract = {Software-Defined Radios (SDR) are already widely-used and often implemented in terrestrial Radio Frequency (RF) and wireless applications. Even the very conservative and slow changing space industry has identified the benefits of reconfigurable radio systems and uses SDRs on satellites and space vehicles. Nevertheless, those systems are mostly inapplicable for lower- and mid-class mission, or are often limited in performance, reliability and are only available for a specific frequency band. This paper presents the approach for a reliable and highly integrated Generic Software Defined-Radio (GSDR) platform design, using state-of-the-art RF transceiver devices to provide multi-band applications on spacecraft. Design challenges under radiation environments for this GSDR platform are discussed and results of a pre-evolution test under selected radiation condition on a prototype are presented.},
    author = {Koelpin, Alexander and Budroweit, Jan},
    editor = {IEEE},
    language = {English},
    booktitle = {2018 IEEE Topical Workshop on Internet of Space (TWIOS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/201307980},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/TWIOS.2018.8311399},
    eventdate = {2018-01-14/2018-01-18},
    faupublication = {no},
    keywords = {SDR,Radhard},
    pages = {9--12},
    peerreviewed = {Yes},
    title = {Design challenges of a highly integrated SDR platform for multiband spacecraft applications in radiation enviroments},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • P. Jueschke and G. Fischer, "Thermal Memory Effect Characterization of GaN based Class ABJ Power Amplifier using Intrinsic Temperature Measurement" in 2018 IEEE TOPICAL CONFERENCE ON RF/MICROWAVE POWER AMPLIFIERS FOR RADIO AND WIRELESS APPLICATIONS (PAWR), Anaheim, CA, USA, 2018, pp. 5-7. [Bibtex]
    @inproceedings{jueschke2018,
    author = {Jueschke, P. and Fischer, Georg},
    publisher = {IEEE},
    booktitle = {2018 IEEE TOPICAL CONFERENCE ON RF/MICROWAVE POWER AMPLIFIERS FOR RADIO AND WIRELESS APPLICATIONS (PAWR)},
    cris = {https://cris.fau.de/converis/publicweb/publication/211560688},
    year = {2018},
    month = {01},
    day = {01},
    eventdate = {2018-01-14/2018-01-17},
    eventtitle = {IEEE Topical Conference on RF/Microwave Power Amplifiers for Radio and Wireless Applications (PAWR)},
    faupublication = {yes},
    pages = {5--7},
    peerreviewed = {unknown},
    title = {Thermal Memory Effect Characterization of GaN based Class ABJ Power Amplifier using Intrinsic Temperature Measurement},
    venue = {Anaheim, CA, USA},
    }
  • J. Kirchner, S. Faghih-Naini, P. Bisgin, and G. Fischer, "Sensor Selection for Classification of Physical Activity in Long-Term Wearable Devices" in 2018 IEEE SENSORS, New Delhi, India, 2018, pp. 1709-1712. [Bibtex]
    @inproceedings{kirchner2018d,
    author = {Kirchner, Jens and Faghih-Naini, Samira and Bisgin, Pinar and Fischer, Georg},
    publisher = {IEEE},
    booktitle = {2018 IEEE SENSORS},
    cris = {https://cris.fau.de/converis/publicweb/publication/220867533},
    year = {2018},
    month = {01},
    day = {01},
    eventdate = {2018-10-28/2018-10-31},
    eventtitle = {17th IEEE SENSORS Conference},
    faupublication = {yes},
    issn = {1930-0395},
    pages = {1709--1712},
    peerreviewed = {unknown},
    title = {Sensor Selection for Classification of Physical Activity in Long-Term Wearable Devices},
    venue = {New Delhi, India},
    }
  • J. Lichtblau, B. Sanftl, F. Lurz, R. Weigel, and A. Koelpin, "Examination of OFDM for Wireless Train-Onboard Communication" in IEEE Radio Wireless Symposium, Anaheim, CA, USA, 2018, pp. 184-187. [DOI] [Bibtex]
    @inproceedings{lichtblau2018,
    author = {Lichtblau, Johann and Sanftl, Benedikt and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    language = {English},
    booktitle = {IEEE Radio Wireless Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/123605504},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/RWS.2018.8304981},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    issn = {2164-2974},
    pages = {184--187},
    peerreviewed = {unknown},
    title = {Examination of OFDM for Wireless Train-Onboard Communication},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • F. Lurz, F. Michler, B. Scheiner, R. Weigel, and A. Koelpin, "Microw(h)att?! Ultralow-Power Six-Port Radar", IEEE Microwave Magazine, vol. 19, iss. 1, pp. 91-98, 2018. [DOI] [Bibtex]
    @article{lurz2018,
    author = {Lurz, Fabian and Michler, Fabian and Scheiner, Benedict and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Microwave Magazine},
    cris = {https://cris.fau.de/converis/publicweb/publication/120389104},
    year = {2018},
    month = {01},
    doi = {10.1109/MMM.2017.2759640},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {1},
    pages = {91--98},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {Microw(h)att?! Ultralow-Power Six-Port Radar},
    volume = {19},
    }
  • F. Lurz, P. Hofstetter, S. Lindner, S. Linz, F. Michler, R. Weigel, and A. Koelpin, "Low-Power Frequency Synthesizer for Multi-Tone Six-Port Radar" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Anaheim, CA, USA, 2018, pp. 84-87. [DOI] [Bibtex]
    @inproceedings{lurz2018a,
    author = {Lurz, Fabian and Hofstetter, Patrick and Lindner, Stefan and Linz, Sarah and Michler, Fabian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120470944},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/WISNET.2018.8311571},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    pages = {84--87},
    peerreviewed = {Yes},
    title = {Low-Power Frequency Synthesizer for Multi-Tone Six-Port Radar},
    venue = {Anaheim, CA, USA},
    }
  • S. Mueller, S. Danzeca, R. Garcia Alía, M. Brugger, R. Weigel, and A. Koelpin, "Circuit Design for a Radiation Tolerant 2.4 GHz Synthesizer Based on COTS Components" in IEEE Topical Workshop on Internet of Space (TWIOS), Anaheim, USA, 2018, pp. 13-16. [DOI] [Bibtex]
    @inproceedings{mueller2018a,
    author = {Mueller, Steffen and Danzeca, Salvatore and Garcia Alía, Rubén and Brugger, Markus and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE Topical Workshop on Internet of Space (TWIOS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/119110464},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/TWIOS.2018.8311400},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    isbn = {9781538612941},
    pages = {13--16},
    peerreviewed = {unknown},
    title = {Circuit Design for a Radiation Tolerant 2.4 GHz Synthesizer Based on COTS Components},
    type = {Konferenzschrift},
    venue = {Anaheim, USA},
    }
  • F. Pflaum, R. Weigel, and A. Koelpin, "Ultra-Low-Power Sensor Node with Wake-Up-Functionality for Smart-Sensor-Applications" in 2018 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Anaheim, CA, USA, 2018, pp. 107-110. [DOI] [Bibtex]
    @inproceedings{pflaum2018,
    abstract = {In this paper a complete mobile sensor node which has the ability to monitor temperature, atmospheric pressure, relative humidity, brightness and magnetic fields is presented. Very low power consumption is achieved due to deliberate component selection, on-demand-operation made possible by a low-power wake-up circuit and measurement protocol, which allows the controller, transmitter and sensors to be in a battery-saving inactive mode for most of the time. Additionally, the sensor node can also be localized within a previously calibrated area.},
    author = {Pflaum, Felix and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/111069244},
    year = {2018},
    month = {01},
    day = {17},
    doi = {10.1109/WISNET.2018.8311577},
    eventdate = {2018-01-14/2018-01-18},
    eventtitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    faupublication = {yes},
    pages = {107--110},
    peerreviewed = {unknown},
    title = {Ultra-Low-Power Sensor Node with Wake-Up-Functionality for Smart-Sensor-Applications},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • T. Reißland, B. Lenhart, J. Lichtblau, M. Sporer, A. Koelpin, and R. Weigel, "Evaluation of ISAR-based autofocus methods for estimation of true-speed-over-ground using a 24 GHz FMCW-Radar" in 2018 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS (APMC), Kyoto, Japan, 2018, pp. 1238-1240. [Bibtex]
    @inproceedings{reissland2018b,
    author = {Reißland, Torsten and Lenhart, Björn and Lichtblau, Johann and Sporer, Michael and Koelpin, Alexander and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {2018 ASIA-PACIFIC MICROWAVE CONFERENCE PROCEEDINGS (APMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/211559723},
    year = {2018},
    month = {01},
    day = {01},
    eventdate = {2018-11-06/2018-11-09},
    eventtitle = {Asia-Pacific Microwave Conference (APMC)},
    faupublication = {yes},
    pages = {1238--1240},
    peerreviewed = {unknown},
    title = {Evaluation of ISAR-based autofocus methods for estimation of true-speed-over-ground using a 24 GHz FMCW-Radar},
    venue = {Kyoto, Japan},
    }
  • A. Itzke, R. Weiss, and R. Weigel, "Influence of the Conductor Position on a Circular Array of Hall Sensors for Current Measurement", IEEE Transactions on Industrial Electronics, 2018. [DOI] [Bibtex]
    @article{itzke2018a,
    author = {Itzke, Alexander and Weiss, Roland and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/202381855},
    year = {2018},
    doi = {10.1109/TIE.2018.2826462},
    faupublication = {no},
    issn = {0278-0046},
    journaltitle = {IEEE Transactions on Industrial Electronics},
    peerreviewed = {Yes},
    shortjournal = {IEEE T IND ELECTRON},
    title = {Influence of the Conductor Position on a Circular Array of Hall Sensors for Current Measurement},
    }
  • A. Tobola, H. Leutheuser, M. Pollak, P. Spies, C. Hofmann, C. Weigand, B. Eskofier, and G. Fischer, "Self-powered Multiparameter Health Sensor", IEEE Journal of Biomedical and Health Informatics, vol. 22, iss. 1, pp. 15-22, 2018. [Bibtex]
    @article{tobola2018,
    author = {Tobola, Andreas and Leutheuser, Heike and Pollak, M and Spies, Peter and Hofmann, Christian and Weigand, Christian and Eskofier, Björn and Fischer, Georg},
    cris = {https://cris.fau.de/converis/publicweb/publication/209164693},
    year = {2018},
    faupublication = {yes},
    issn = {2168-2194},
    journaltitle = {IEEE Journal of Biomedical and Health Informatics},
    number = {1},
    pages = {15--22},
    peerreviewed = {Yes},
    title = {Self-powered Multiparameter Health Sensor},
    volume = {22},
    }
  • A. Itzke, R. Weiss, T. DiLeo, and R. Weigel, "The Influence of Interference Sources on a Magnetic Field-Based Current Sensor for Multiconductor Measurement", IEEE Sensors Journal, 2018. [DOI] [Bibtex]
    @article{itzke2018,
    author = {Itzke, Alexander and Weiss, Roland and DiLeo, Taylor and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/202379029},
    year = {2018},
    doi = {10.1109/JSEN.2018.2849510},
    faupublication = {no},
    issn = {1530-437X},
    journaltitle = {IEEE Sensors Journal},
    peerreviewed = {Yes},
    shortjournal = {IEEE SENS J},
    title = {The Influence of Interference Sources on a Magnetic Field-Based Current Sensor for Multiconductor Measurement},
    }
  • K. Lomakin, D. Simon, M. Sippel, G. Gold, K. Helmreich, E. Seler, Z. Tong, and R. Reuter, "3D Printed Slotted Waveguide Array Antenna for Automotive Radar Applications in W-Band" in 48th European Microwave Conference (EuMW 2018), 2018. [DOI] [Bibtex]
    @inproceedings{lomakin2018,
    author = {Lomakin, Konstantin and Simon, D. and Sippel, Mark and Gold, Gerald and Helmreich, Klaus and Seler, Ernst and Tong, Z. and Reuter, R.},
    language = {English},
    booktitle = {48th European Microwave Conference (EuMW 2018)},
    cris = {https://cris.fau.de/converis/publicweb/publication/200710352},
    year = {2018},
    doi = {10.23919/EUMC.2018.8541536},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {3D Printed Slotted Waveguide Array Antenna for Automotive Radar Applications in W-Band},
    }
  • A. Bereyhi, M. A. Sedaghat, R. Müller, and G. Fischer, "GLSE Precoders for Massive MIMO Systems: Analysis and Applications", IEEE Transactions on Wireless Communications, 2018. [Bibtex]
    @article{bereyhi2018,
    abstract = {This paper proposes the class of Generalized Least-Square-Error (GLSE) precoders for multiuser massive MIMO systems. For a generic transmit constellation, GLSE precoders minimize the interference at user terminals assuring that given constraints on the transmit signals are satisfied. The general form of these precoders enables us to impose multiple restrictions at the transmit signal such as limited peak power and restricted number of active transmit antennas. Invoking the replica method from statistical mechanics, we study the performance of GLSE precoders in the large-system limit. We show that the output symbols of these precoders are identically distributed and their statistics are described with an equivalent scalar GLSE precoder. Using the asymptotic results, we further address some applications of the GLSE precoders; namely forming transmit signals over a restricted alphabet and transmit antenna selection. Our investigations demonstrate that a computationally efficient GLSE precoder requires 41% fewer active transmit antennas than conventional selection protocols in order to achieve a desired level of input-output distortion. },
    author = {Bereyhi, Ali and Sedaghat, Mohammad Ali and Müller, Ralf and Fischer, Georg},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/204066794},
    year = {2018},
    faupublication = {yes},
    issn = {1536-1276},
    journaltitle = {IEEE Transactions on Wireless Communications},
    peerreviewed = {Yes},
    shortjournal = {IEEE T WIREL COMMUN},
    title = {GLSE Precoders for Massive MIMO Systems: Analysis and Applications},
    type = {Article in Journal},
    url = {https://arxiv.org/abs/1808.01880},
    }
  • A. Talai, A. Koelpin, A. Bittner, F. Steinhäußer, U. Schmid, and A. Koelpin, "Porösizierte Glaskeramik-Substrate für die Radarsensorik," in Automobil-Sensorik 2, T. Tille, Ed., Springer-Verlag, 2018, pp. 55-75. [DOI] [Bibtex]
    @inbook{talai2018,
    abstract = {Für Komfortfunktionen und aktive Sicherheitsfunktionen werden in modernen Fahrzeugen Radarsensoren im freigegebenen Frequenzband zwischen 77 GHz und 79 GHz benötigt. Um einen langzeitstabilen Betrieb bei gleichzeitig geringer Baugröße der Radarsensoren zu gewährleisten, müssen robuste Materialsysteme mit geeigneten dielektrischen Eigenschaften im Bereich der Aufbau- und Verbindungstechnik verwendet werden. Kommerzielle LTCC (engl.: low temperature cofired ceramics) Glaskeramiksubstrate ermöglichen einen dreidimensionalen Aufbau bei hervorragenden Hochfrequenzeigenschaften. Um die Antennencharakteristik zu optimieren, wird ein Porösizier-Verfahren vorgestellt, um eine lokal reduzierte Permittivität zu erreichen. Dabei wird nasschemisch das Glaskeramikmaterial porösiziert, um oberflächennah eine Schicht mit reduzierter dielektrischer Konstante zu erzielen. Diese wird durch den Vergleich von Hochfrequenzmessungen mit numerischen Simulationsergebnissen bestimmt.
    }, author = {Talai, Armin and Koelpin, Alexander and Bittner, Achim and Steinhäußer, Frank and Schmid, Ulrich and Koelpin, Alexander}, editor = {Tille, Thomas}, language = {English}, publisher = {Springer-Verlag}, booktitle = {Automobil-Sensorik 2}, cris = {https://cris.fau.de/converis/publicweb/publication/207682530}, year = {2018}, doi = {10.1007/978-3-662-56310-6_3}, faupublication = {yes}, isbn = {9783662563090}, keywords = {Radar; Automotive; LTCC}, pages = {55--75}, peerreviewed = {Yes}, title = {Porösizierte Glaskeramik-Substrate für die Radarsensorik}, type = {Buchkapitel}, }

2017

  • R. Löhr, L. Bender, J. Röber, F. Ohnhäuser, and R. Weigel, "Analysis of the Settling Behavior of an External Reference Voltage Source for a 16 Bit and 200 MS/s Pipeline Analog-to-Digital Converter" in 24th IEEE International Conference on Electronics, Circuits and Systems (ICECS), Batumi, Georgien, Georgia, 2017. [Bibtex]
    @inproceedings{loehr2017a,
    abstract = {
    High-Performance Analog to Digital Converter (ADC) have high requirements concerning the reference voltage source. In a small period of time the reference voltage has to settle with a high accuracy. Otherwise the linearity of the ADC degrades. In this paper the settling of an external reference voltage source is examined. Therefore optimization techniques for the signal path of the reference voltage are presented. This includes methods for reducing the external parasitic inductanceas well as design techniques for an enhanced settling curve. Under typical conditions, the achieved reference voltage source settles with an accuracy of 15 uV in less than halve a clock cycle for a 200 MS/s and 16 bits Pipeline ADC.
    }, author = {Löhr, Robert and Bender, Leon and Röber, Jürgen and Ohnhäuser, Frank and Weigel, Robert}, language = {English}, booktitle = {24th IEEE International Conference on Electronics, Circuits and Systems (ICECS)}, cris = {https://cris.fau.de/converis/publicweb/publication/119647484}, year = {2017}, month = {12}, day = {08}, eventdate = {2017-12-04/2017-12-08}, faupublication = {yes}, keywords = {reference voltage; settling; Pipeline ADC; external parasitic inductance; attenuation}, peerreviewed = {unknown}, title = {Analysis of the Settling Behavior of an External Reference Voltage Source for a 16 Bit and 200 MS/s Pipeline Analog-to-Digital Converter}, type = {Konferenzschrift}, venue = {Batumi, Georgien, Georgia}, }
  • J. Kirchner, M. Arnold, and G. Fischer, "Reconstruction of 3D-Movement of ICD Leads from Clinical-Routine X-Ray Movies" in 2017 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT), Bilbao, Spain, 2017, pp. 399-404. [DOI] [Bibtex]
    @inproceedings{kirchner2017c,
    abstract = {A technique is proposed to reconstruct the threedimensional movement of leads of implantable cardioverter defibrillators from X-ray movies obtained as part of clinical routine during implantation. The technique is applied to data from 16 patients. 12 of them provide results with a sufficient accuracy of less than 2.5 mm in terms of half of the minimum distance of the projection lines and when compared to the length of the shock coil as reference. From the reconstructed 3D data, the movement along and perpendicular to the lead axes as well as tilt are obtained. Such data will prove useful in research on material fatigue and cardiac sensors integrated into the leads.},
    author = {Kirchner, Jens and Arnold, Martin and Fischer, Georg},
    language = {English},
    booktitle = {2017 IEEE International Symposium on Signal Processing and Information Technology (ISSPIT)},
    cris = {https://cris.fau.de/converis/publicweb/publication/111729464},
    year = {2017},
    month = {12},
    day = {18},
    doi = {10.1109/ISSPIT.2017.8388676},
    eventdate = {2017-12-18/2017-12-20},
    faupublication = {yes},
    keywords = {cardiology; defibrillators; diagnostic radiography; image reconstruction; medical image processing; prosthetics; reconstructed 3D data; lead axes; implantable cardioverter defibrillators; three-dimensional movement; clinical-routine X-ray movies; ICD leads; 3D-movement; shock coil; projection lines; minimum distance; motion pictures; electric shock lead; heart; X-ray imaging; image reconstruction; signal processing; ICD; lead; cardiac movement; X-ray movie; 3D reconstruction; implantation},
    pages = {399--404},
    peerreviewed = {Yes},
    title = {Reconstruction of 3D-Movement of ICD Leads from Clinical-Routine X-Ray Movies},
    type = {Article in Journal},
    url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8388676&isnumber=8388305},
    venue = {Bilbao, Spain},
    }
  • J. Kirchner, S. Souilem, and G. Fischer, "Wearable System for Measurement of Thoracic Sounds with a Microphone Array" in IEEE SENSORS 2017, Glasgow, UK, 2017, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{kirchner2017b,
    abstract = {Acoustic signals from the thorax provide diagnostic information about the heart, the respiratory and the digestive system. This information is useful for both the detection of acute illness, e.g. in elderly care, and for the monitoring of chronic diseases. Here, a wearable system for long-term capture of thoracic sounds is proposed that comprises four microphones for physiological signals and one for noise from the surrounding. The performance of the prototype is evaluated in comparison to a reference stethoscope and under different wearing conditions. Combining the microphones will provide means for cancellation of environmental noise, fusion of acoustic signals from different physiological sources as well as focusing on a particular source by use of beamforming.},
    author = {Kirchner, Jens and Souilem, Sara and Fischer, Georg},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE SENSORS 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/109573904},
    year = {2017},
    month = {12},
    day = {25},
    doi = {10.1109/ICSENS.2017.8234248},
    eventdate = {2017-10-30/2017-11-01},
    faupublication = {yes},
    keywords = {wearable system; long-term capture; microphones; physiological signals; acoustic signals; microphone array; diagnostic information; elderly care; wearing conditions; physiological sources; thoracic sounds measurement; chronic diseases monitoring; heart; microphones; prototypes; biomedical monitoring; stethoscope; acoustics; acoustic signals; wearable system; thorax; heart sounds; sensor array},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Wearable System for Measurement of Thoracic Sounds with a Microphone Array},
    type = {Konferenzschrift},
    url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=8234248&isnumber=8233862},
    venue = {Glasgow, UK},
    }
  • F. X. Röhrl, R. Sammer, J. Jakob, W. Bogner, R. Weigel, U. Hassel, and S. Zorn, "Cost-Effective SIW Band-Pass Filters for Millimeter Wave Applications - A method to combine low tolerances and low prices on standard pcb substrates" in European Microwave Conference, Nürnberg, Germany, 2017. [DOI] [Bibtex]
    @inproceedings{roehrl2017,
    abstract = {The fabrication of passive RF structures in the
    millimeter wave frequency range with conventional printed
    circuit technology is subjected to some disadvantages (available
    design rules, dimensional accuracy and tolerances) compared to
    ceramic circuit carriers. The here presented SPE (sequential pre
    etching) process technology allows a significant reduction of these
    disadvantages, without diminishing the robustness of the PCB
    against environmental influences (IPC-A-600 class 3). The
    tolerance of the up to now dominating etching process is reduced
    from ±15 µm (at a copper height of 35 µm) to ±5 µm (at a copper
    height of 15 µm). For filters the new technology provides two
    benefits. Due to the lower copper thickness, the permitted design
    rules are significantly improved (line/space 50/50 µm at all layers
    – even at electroplated copper layers). Therefore structures with
    minimized dimensions can be realized. In addition the reduced
    etching tolerance allows fabricating filters with accurate and
    constant filter edges. In order to demonstrate the advantages, a
    high-slope SIW (substrate integrated waveguide) band-pass filter
    in the V-Band is presented. It is shown how the characteristic
    and tolerances of the filter are changed positively by the SPE
    technology.}, author = {Röhrl, Franz Xaver and Sammer, Roman and Jakob, Johannes and Bogner, Werner and Weigel, Robert and Hassel, Uwe and Zorn, Stefan}, language = {English}, booktitle = {European Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/108870344}, year = {2017}, month = {12}, day = {21}, doi = {10.23919/EUMC.2017.8230878}, eventdate = {2017-10-10/2017-10-12}, faupublication = {yes}, keywords = {band-pass filter (BPF); substrate integrated waveguide (SIW); low loss substrate; impedance controlled PCB; signal integrity; millimeter wave; sequential pre etching (SPE)}, peerreviewed = {Yes}, title = {Cost-Effective SIW Band-Pass Filters for Millimeter Wave Applications - A method to combine low tolerances and low prices on standard pcb substrates}, type = {Konferenzschrift}, url = {http://ieeexplore.ieee.org/document/8230878/}, venue = {Nürnberg, Germany}, }
  • V. Silva Cortes, J. Binder, G. Fischer, and A. Hagelauer, "Influence of Loss Mechanisms on High Q Whispering Gallery Mode (WGM) Resonators suitable for RF Applications" in IEEE Electrical Design of Advanced Packaging and Systems Symposium, Haining, China, 2017, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{silva2017a,
    author = {Silva Cortes, Victor and Binder, Jonathan and Fischer, Georg and Hagelauer, Amelie},
    booktitle = {IEEE Electrical Design of Advanced Packaging and Systems Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/118213084},
    year = {2017},
    month = {12},
    day = {14},
    doi = {10.1109/EDAPS.2017.8276917},
    eventdate = {2017-12-14/2017-12-16},
    eventtitle = {IEEE Electrical Design of Advanced Packaging and Systems Symposium},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Influence of Loss Mechanisms on High Q Whispering Gallery Mode (WGM) Resonators suitable for RF Applications},
    type = {Konferenzschrift},
    venue = {Haining, China},
    }
  • V. Chauhan, R. Weigel, and A. Hagelauer, "Non-linearity in Surface Acoustic Wave devices for wireless communication at 2 GHz frequency From wafer measurements to PCB simulation" in European Microwave Week (EuMW), Worshop on High-Q RF MEMS devices and multiphysical cross-layer circuit design, Nuremberg, Germany, 2017. [Bibtex]
    @inproceedings{chauhan2017a,
    abstract = {The growing complexity in RF front-ends which includes carrier aggregation and growing number of frequency bands leads to the non-linearity in acoustic devices such as Surface Acoustic Wave components (SAW). In this work, 30 different versions of 1-port and 2-port single SAW resonators are created for wafer level and printed circuit board (PCB) measurements. During the fabrication process, several different wafer designs are created like "wafer before trimming", "wafer before trimming but with passivation", "wafer after trimming but without passivation", "wafer with trimming and passivation" to the study the non-linearity. Wafer measurements and simulations are performed for different metalization ratios. Similarly, the PCB measurements up to third order inter-modulation products (IMD) and harmonics are carried out using X-parameter and conventional measurement set-up at high input power. The measurements results are compared with the nonlinear P-matrix simulation model to study the dominant sources of second and third order non-linearity in SAW components. The final goal is to find which versions of 1-port and 2-port single SAW resonators has reduced non-linearity},
    author = {Chauhan, Vikrant and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {European Microwave Week (EuMW), Worshop on High-Q RF MEMS devices and multiphysical cross-layer circuit design},
    cris = {https://cris.fau.de/converis/publicweb/publication/201793589},
    year = {2017},
    month = {12},
    day = {08},
    eventdate = {2017-12-08/2017-12-08},
    eventtitle = {European Microwave Week (EuMW), Worshop on High-Q RF MEMS devices and multiphysical cross-layer circuit design},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Non-linearity in Surface Acoustic Wave devices for wireless communication at 2 GHz frequency From wafer measurements to PCB simulation},
    type = {Abstract zum Vortrag},
    venue = {Nuremberg, Germany},
    }
  • M. Dietz, T. Girg, A. Bauch, K. Aufinger, A. Hagelauer, D. Kissinger, and R. Weigel, "Broadband Multi-Octave Receiver from 1-32 GHz for Monolithic Integrated Vector Network Analyzers (VNA) in SiGe-Technology" in European Microwave Integrated Circuits Conference, Nuremberg, Germany, Germany, 2017, pp. 49-52. [DOI] [Bibtex]
    @inproceedings{dietz2017,
    author = {Dietz, Marco and Girg, Thomas and Bauch, Andreas and Aufinger, Klaus and Hagelauer, Amelie and Kissinger, Dietmar and Weigel, Robert},
    language = {English},
    booktitle = {European Microwave Integrated Circuits Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/109124884},
    year = {2017},
    month = {12},
    day = {08},
    doi = {10.23919/EUMIC.2017.8230657},
    eventdate = {2017-10-08/2017-10-13},
    eventtitle = {European Microwave Integrated Circuits Conference},
    faupublication = {yes},
    pages = {49--52},
    peerreviewed = {unknown},
    title = {Broadband Multi-Octave Receiver from 1-32 GHz for Monolithic Integrated Vector Network Analyzers (VNA) in SiGe-Technology},
    type = {Konferenzschrift},
    venue = {Nuremberg, Germany, Germany},
    }
  • T. Mai, K. Schmid, A. Hagelauer, R. Weigel, and J. Röber, "A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices" in 24th IEEE International Conference on Electronics, Circuits and Systems, Batumi, Georgia, 2017, pp. 74-77. [DOI] [Bibtex]
    @inproceedings{mai2017,
    abstract = {A fully differential CMOS operational amplifier is presented. It uses a new chopping technique that works without the use of switching transistors in the high gain path, resulting in high noise performance and low offset. It is designed in a low-cost 180 nm process with a 5V supply voltage. In critical places, such as the differential pair, 1.8V-devices are used, as they provide much better matching and noise performance, and at the same time have lower parasitics. They are protected from breakdown conditions by several circuit techniques. Some of them are described below. The operational amplifier is used in a differential programmable gain amplifier for processing signals of up to 50 kHz bandwith with a SINAD > 100 dB, making it suitable as a preamplifier for 18-Bit ADCs.},
    author = {Mai, Timo and Schmid, Konstantin and Hagelauer, Amelie and Weigel, Robert and Röber, Jürgen},
    language = {English},
    booktitle = {24th IEEE International Conference on Electronics, Circuits and Systems},
    cris = {https://cris.fau.de/converis/publicweb/publication/108861104},
    year = {2017},
    month = {12},
    day = {05},
    doi = {10.1109/ICECS.2017.8292081},
    eventdate = {2017-12-05/2017-12-08},
    faupublication = {yes},
    keywords = {chopping; operational amplifier; gain boosting; 1/f-noise; offset; programmable gain amplifier;},
    pages = {74--77},
    peerreviewed = {unknown},
    title = {A fully-differential Operational Amplifier using a new Chopping Technique and Low-Voltage Input Devices},
    type = {Journal Article},
    venue = {Batumi, Georgia},
    }
  • D. Werner, M. Greif, C. Eßelmann, K. Reiter, and E. Schwenzfeier-Hellkamp, "Mess- und Bewertungskriterien einer bedarfsorientierten Beleuchtung für Mensch und Tier in der Milchviehhaltung" in 49. internationalen Tagung Angewandte Ethologie, Freiburg i. Br., 2017. [Bibtex]
    @inproceedings{werner2017c,
    author = {Werner, Daniel and Greif, Maike and Eßelmann, Christian and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {49. internationalen Tagung Angewandte Ethologie},
    cris = {https://cris.fau.de/converis/publicweb/publication/204755859},
    year = {2017},
    month = {11},
    day = {23},
    eventdate = {2017-11-23/2017-11-25},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Mess- und Bewertungskriterien einer bedarfsorientierten Beleuchtung für Mensch und Tier in der Milchviehhaltung},
    type = {Abstract zum Poster},
    venue = {Freiburg i. Br.},
    }
  • A. Mayer, M. Mayer, W. Ruile, V. Chauhan, and K. Wagner, "Harmonic generation in an L-section of a Rayleigh-type SAW filter" in IEEE International Ultrasonics Symposium 2017, Washington DC, 2017, p. 4. [DOI] [Bibtex]
    @inproceedings{mayer2017,
    author = {Mayer, Andreas and Mayer, Markus and Ruile, Werner and Chauhan, Vikrant and Wagner, Karl},
    language = {English},
    booktitle = {IEEE International Ultrasonics Symposium 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/118125964},
    year = {2017},
    month = {11},
    day = {02},
    doi = {10.1109/ULTSYM.2017.8092974},
    eventdate = {2017-09-06/2017-09-09},
    eventtitle = {International Ultrasonics Symposium 2017},
    faupublication = {yes},
    isbn = {9781538633830},
    issn = {1948-5727},
    pages = {4},
    peerreviewed = {No},
    title = {Harmonic generation in an L-section of a Rayleigh-type SAW filter},
    url = {http://ieeexplore.ieee.org/document/8092974/},
    venue = {Washington DC},
    }
  • S. Lindner, "Systemgrenzen und Fehlerkompensationsstrategien der Sechstormesstechnik im industriellen Kontext", 2017. [DOI] [Bibtex]
    @phdthesis{lindner2017a,
    abstract = {Die sechstorbasierte Empfängerarchitektur ist bereits seit den siebziger Jahren bekannt und
    erlangte in den vergangenen Jahren weltweit wieder vermehrt die Aufmerksamkeit verschiedener
    Forschungsgruppen. Dies liegt zum einen darin begründet, dass die Implementierung der Technologie
    in dem für neue Anwendungen oft verwendeten Frequenzbereich oberhalb von 10 GHz
    einfach möglich ist, und zum anderen daran, dass das hohe Phasenauflösungsvermögen dieser
    Architektur bereits vielfach gezeigt werden konnte. Durch diese Eigenschaften eignet sich die
    Sechstortechnik besonders für das sich in Entwicklung befindliche Feld der mikrowellenbasierten
    industriellen Sensorik, für das günstige Sensoren mit kleinen Bauformen benötigt werden, an die
    hohe Anforderungen bezüglich Genauigkeit und Latenz gestellt werden. Inwieweit das Sechstor
    dazu geeignet ist, soll der Untersuchungsgegenstand dieser Abhandlung sein.
    Nach einer Einführung in die Funktionsweise der Architektur folgt zu diesem Zweck ein
    Vergleich, um die Vorteile des additiven Mischansatzes der Sechstortechnologie gegenüber
    einem ebenfalls passiven, jedoch multiplikativen Mischer zu zeigen. Anschließend werden für
    die industrielle Sensorik wichtige Messaufgaben, wie die Frequenzmessung, die hochgenaue
    Abstandsmessung sowie die Vibrationsanalyse und deren jeweilige Implementierungen mit der
    Sechstorarchitektur, eingeführt.
    Basierend auf diesen Anwendungen folgt im Anschluss ein umfangreiches Kapitel, in dem
    die Systemauslegung sowie die Systemgrenzen auf theoretischer Basis und anhand von Simulationen
    analysiert werden. Es wird gezeigt, dass viele der Störeinflüsse durch entsprechende
    Kompensationsstrategien unterdrückt werden können, um die Messunsicherheit zu verringern.
    Außerdem werden für die Abstands- und Frequenzmessung dedizierte Linearisierungsverfahren,
    die im Rahmen dieser Arbeit entwickelt wurden, dargestellt. Besonders für das ebenfalls vorgestellte
    Mehrtonverfahren, das die Erweiterung des eindeutigen Messbereichs ermöglicht, ist eine
    effektive Unterdrückung von Nichtidealitäten durch diese Linearisierungsverfahren nötig.
    Um die Realisierbarkeit der dargestellten Anwendungen zu zeigen, werden ausgewählte Demonstratoren
    und deren Ergebnisse vorgestellt. Diese zeigen für die Abstandsmessung Genauigkeiten
    von wenigen Mikrometern und für die Frequenzmessung einen relativen Fehler weniger
    Millionstel (parts per million, ppm). Darüber hinaus wird auch ein erster Prototyp und dessen
    optimierter Entwicklungsprozess für einen industriellen Abstandssensor gezeigt, der auf
    der Sechstortechnik beruht und eine erste kommerzielle Realisierung dieser Technik für die
    Abstandsmessung darstellt.}, author = {Lindner, Stefan}, editor = {der FAU University Press, Wissenschaftlichen Beirat}, institution = {FAU Erlangen-Nürnberg}, language = {German}, publisher = {FAU University Press}, booktitle = {FAU Forschungen, Reihe B, Medizin, Naturwissenschaft, Technik}, cris = {https://cris.fau.de/converis/publicweb/publication/118184924}, year = {2017}, month = {11}, doi = {10.25593/978-3-96147-069-3}, entrysubtype = {Dissertation}, faupublication = {yes}, isbn = {9783961470686}, keywords = {Six-port; Sechstor; Radar; Nahbereich; Short-range-radar; FSK; ISM; Frequenzmessung}, peerreviewed = {automatic}, title = {Systemgrenzen und Fehlerkompensationsstrategien der Sechstormesstechnik im industriellen Kontext}, type = {Dissertation}, }
  • J. Rimmelspacher, A. Hagelauer, R. Weigel, and V. Issakov, "Experimental Study of Injected Interference Effects on Modulated Sidebands in CMOS LC VCO" in International Conference on Microwaves, Communications, Antennas and Electronic Systems, Tel-Aviv, Israel, 2017, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{rimmelspacher2017a,
    abstract = {This paper presents an experimental study on modulated sidebands in the output spectrum of a millimeterwave (mm-wave) CMOS voltage controlled oscillator (VCO). The results are used to calculate the injected current into the resonant tank in dependency on its locking range. The evaluated parameters are a measure of the oscillator’s sensitivity regarding injected periodic interferences. This is of interest when implemented in highly integrated systems, as e.g. in system-on-chip solutions.},
    author = {Rimmelspacher, Johannes and Hagelauer, Amelie and Weigel, Robert and Issakov, Vadim},
    language = {English},
    booktitle = {International Conference on Microwaves, Communications, Antennas and Electronic Systems},
    cris = {https://cris.fau.de/converis/publicweb/publication/111498024},
    year = {2017},
    month = {11},
    day = {13},
    doi = {10.1109/COMCAS.2017.8244812},
    eventdate = {2017-11-13/2017-11-15},
    faupublication = {yes},
    keywords = {injection locking,injection pulling,interference,modulated sidebands,millimeter-wave oscillator,CMOS technolog},
    pages = {1--4},
    peerreviewed = {unknown},
    title = {Experimental Study of Injected Interference Effects on Modulated Sidebands in CMOS LC VCO},
    type = {Journal Article},
    venue = {Tel-Aviv, Israel},
    }
  • M. Greif, D. Werner, E. Schwenzfeier-Hellkamp, and K. Reiter, "Einfluss von unterschiedlichen Lichtspektren auf das Verhalten von Milchvieh" in 49. Internationale Tagung Angewandte Ethologie, Freiburg i. Br., 2017. [Bibtex]
    @inproceedings{greif2017a,
    author = {Greif, Maike and Werner, Daniel and Schwenzfeier-Hellkamp, Eva and Reiter, Klaus},
    booktitle = {49. Internationale Tagung Angewandte Ethologie},
    cris = {https://cris.fau.de/converis/publicweb/publication/204756253},
    year = {2017},
    month = {11},
    day = {23},
    eventdate = {2017-11-23/2017-11-25},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Einfluss von unterschiedlichen Lichtspektren auf das Verhalten von Milchvieh},
    type = {Abstract zum Poster},
    venue = {Freiburg i. Br.},
    }
  • M. Frank, A. Talai, R. Weigel, and A. Koelpin, "In-Line Material Characterization Sensors Operating at 10 GHz and 77 GHz" in Asia Pacific Microwave Conference (APMC) 2017, Kuala Lumpur, Malaysia, 2017, pp. 1306-1309. [DOI] [Bibtex]
    @inproceedings{frank2017b,
    abstract = {This paper describes the design of two sensors for the in-line material characterization of bulk and metallized dielectrics around 10,GHz and 77,GHz in order to determine the relative permittivity of RF substrates. The sensors are based on a resonant grounded coplanar waveguide structure and can be applied on top of a material under test. The shift in the resonance frequency between loaded and unloaded resonator is evaluated by 3D full wave simulations in order to determine the relative permittivity. The basic sensor structure is improved for the in-line characterization of printed circuit boards by a clearance of the resonator area and the filling of the air gaps. Measurements with different MUTs were performed with both sensors followed by the evaluation of the relative permittivity. The results are in good agreement with the expected permittivity values and show high reproducibility.},
    author = {Frank, Martin and Talai, Armin and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {Asia Pacific Microwave Conference (APMC) 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/106190084},
    year = {2017},
    month = {11},
    day = {13},
    doi = {10.1109/APMC.2017.8251702},
    eventdate = {2017-11-13/2017-11-16},
    faupublication = {yes},
    keywords = {Material Characterization; Relative Permittivity; Grounded Coplanar Waveguide},
    pages = {1306--1309},
    peerreviewed = {unknown},
    title = {In-Line Material Characterization Sensors Operating at 10 GHz and 77 GHz},
    type = {Konferenzschrift},
    venue = {Kuala Lumpur, Malaysia},
    }
  • D. Werner, M. Greif, K. Reiter, and E. Schwenzfeier-Hellkamp, "Mess- und Bewertungskriterien einer bedarfsorientierten Beleuchtung für Mensch und Tier in der Milchviehhaltung" in 49. Internationale Tagung Angewandte Ethologie, Freiburg i. Br., 2017. [Bibtex]
    @inproceedings{werner2017b,
    author = {Werner, Daniel and Greif, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {49. Internationale Tagung Angewandte Ethologie},
    cris = {https://cris.fau.de/converis/publicweb/publication/203280069},
    year = {2017},
    month = {11},
    day = {23},
    eventdate = {2017-11-23/2017-11-25},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Mess- und Bewertungskriterien einer bedarfsorientierten Beleuchtung für Mensch und Tier in der Milchviehhaltung},
    type = {Konferenzschrift},
    venue = {Freiburg i. Br.},
    }
  • M. Greif, D. Werner, E. Schwenzfeier-Hellkamp, and K. Reiter, "Einfluss von unterschiedlichen Lichtspektren auf das Verhalten von Milchvieh" in 49. Internationale Tagung Angewandte Ethologie, Freiburg i. Br., 2017. [Bibtex]
    @inproceedings{greif2017,
    author = {Greif, Maike and Werner, Daniel and Schwenzfeier-Hellkamp, Eva and Reiter, Klaus},
    booktitle = {49. Internationale Tagung Angewandte Ethologie},
    cris = {https://cris.fau.de/converis/publicweb/publication/203280388},
    year = {2017},
    month = {11},
    day = {23},
    eventdate = {2017-11-23/2017-11-25},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Einfluss von unterschiedlichen Lichtspektren auf das Verhalten von Milchvieh},
    type = {Konferenzschrift},
    venue = {Freiburg i. Br.},
    }
  • Y. Can and G. Fischer, "Basis Forms of Switching Functions" in 10th International Conference on Electrical and Electronics Engineering (ELECO 2017), IEEE Turkey Section, Bursa, 2017. [Bibtex]
    @inproceedings{can2017d,
    abstract = {This paper presents extended forms, equations, and relations of switching function which are derived out of the theory of switching algebra and the combinational circuit design. Two extended forms and four already defined standard forms of switching function, which are partly renamed, are presented. Out of the combinational circuit design these extended forms, the antivalence of disjunctions ADF and the equivalence of conjunctions ECF, are educed and thereby their algebraic expressions are set up. For that, conversion rules which enable the transformation of a disjunction of two variables in equivalence-operation of the same variables and the transformation of a conjunction consisting of two variables in antivalence-operation of the same variables will be lay down. Additionally, exclusion laws regarding to the extended forms ADF and ECF are set up which are deduce out of the distributive laws of the standard forms. Furthermore, in the case of orthogonal representation of these six function forms relations between them result. That means, by orthogonalization of a corresponding function form it can be easily transformed in an equivalent another function form.
    }, author = {Can, Yavuz and Fischer, Georg}, language = {English}, booktitle = {10th International Conference on Electrical and Electronics Engineering (ELECO 2017), IEEE Turkey Section}, cris = {https://cris.fau.de/converis/publicweb/publication/208635548}, year = {2017}, month = {11}, day = {30}, eventdate = {2017-11-30/2017-12-02}, faupublication = {yes}, peerreviewed = {unknown}, title = {Basis Forms of Switching Functions}, type = {Konferenzschrift}, venue = {Bursa}, }
  • W. Akstaller, C. Musolff, R. Weigel, and A. Hagelauer, "X-Parameter Characterization of TC SAW Filters with Enhanced Dynamic Range", IEEE Transactions on Microwave Theory and Techniques, vol. 65, iss. 11, pp. 4541-4549, 2017. [DOI] [Bibtex]
    @article{akstaller2017,
    abstract = {Increasing the integration of radio frequency frontend modules for mobile communication devices results in rising power densities within the components. Additionally, advanced communication techniques demand for more frequency bands to be supported. As a result, the probability of significant nonlinear emissions disturbing adjacent channels increases, and accurate modeling of the device’s response is required. The X-parameter-based modeling approach can be applied to this problem. In this paper, a measurement setup, which is based on a nonlinear vector network analyzer, is utilized in order to characterize a surface acoustic wave (SAW) filter. Due to the low power levels of the generated higher order harmonics and the demand for a power sweep, a high dynamic range (DR) is required. The application of frequency selective attenuators enables an increase of the effective DR by more than 40 dB. Based on this improved measurement setup, single-tone and two-tone X-parameter models of the SAW filter are created and evaluated for their ability to predict intermodulation distortion (IMD). Classic, scalar IMD measurements are used as a reference for the assessment of capabilities and limitations of both X-parameter approaches.},
    author = {Akstaller, Wolfgang and Musolff, Christian and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/109703704},
    year = {2017},
    month = {11},
    doi = {10.1109/TMTT.2017.2751464},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    keywords = {Attenuators;Frequency measurement;Harmonic analysis;Mathematical model;Power harmonic filters;Receivers;Surface acoustic waves;Intermodulation distortion (IMD);X-parameter;nonlinearity;surface acoustic wave (SAW) filter},
    number = {11},
    pages = {4541--4549},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {X-Parameter Characterization of TC SAW Filters with Enhanced Dynamic Range},
    type = {Article in Journal},
    volume = {65},
    }
  • V. Chauhan, M. Mayer, W. Ruile, K. Wagner, R. Weigel, A. Mayer, and A. Hagelauer, "Role of metal electrodes in the generation of third order non-linearities in Surface Acoustic Wave Components" in IEEE International Ultrasonics Symposium 2017, Washington, DC, USA, 2017, p. 4. [DOI] [Bibtex]
    @inproceedings{chauhan2017,
    abstract = {The growing complexity in RF front-ends, which support carrier aggregation and a growing number of frequency bands, leads to tightened nonlinearity requirements in all sub-components. The generation of third order intermodulation products (IMD3) are typical problems caused by the non-linearity of SAW devices. In the present work, we investigate temperature compensating (TC) SAW devices on Lithium Niobate-rot128YX. An accurate FEM simulation model [1] is employed, which allows to better understand the origin of nonlinearities in such acoustic devices.},
    author = {Chauhan, Vikrant and Mayer, Markus and Ruile, Werner and Wagner, Karl and Weigel, Robert and Mayer, Andreas and Hagelauer, Amelie},
    language = {English},
    booktitle = {IEEE International Ultrasonics Symposium 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/118912464},
    year = {2017},
    month = {11},
    day = {11},
    doi = {10.1109/ULTSYM.2017.8091770},
    eventdate = {2017-09-06/2017-09-10},
    eventtitle = {International Ultrasonics Symposium 2017},
    faupublication = {yes},
    isbn = {9781538633830},
    issn = {1948-5727},
    keywords = {SAW; Intermodulation products; Nonlinear},
    pages = {4},
    peerreviewed = {unknown},
    title = {Role of metal electrodes in the generation of third order non-linearities in Surface Acoustic Wave Components},
    type = {Konferenzschrift},
    url = {http://ieeexplore.ieee.org/document/8091770/},
    venue = {Washington, DC, USA},
    }
  • C. Will, S. Mann, F. Michler, T. Reißland, F. Lurz, R. Weigel, and A. Koelpin, "Error Compensation of the Temperature Influence on Radar based Displacement Measurements" in 2017 IEEE Asia Pacific Microwave Conference (APMC), Kuala Lumpur, Malaysia, 2017, pp. 89-92. [DOI] [Bibtex]
    @inproceedings{will2017c,
    abstract = {Highly precise sensor systems for contactless displacement measurements play an important role within the industrial application field. Various radar based measurement systems utilizing different techniques have been published for this purpose, but the influence of the ambient temperature on the measurement results has only rarely been investigated, yet. Whereas many publications deal with research on temperature compensation of single components, this paper describes the influence of the ambient temperature on the entire RF front end of the sensor system, a 61 GHz Six-Port interferometer. After presenting the measurement system, the temperature influences on the four output voltages and the consequences for the measurement results are analyzed. Finally, a compensation algorithm is proposed to decrease the temperature induced impairments of the systematic measurement error.},
    author = {Will, Christoph and Mann, Sebastian and Michler, Fabian and Reißland, Torsten and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {2017 IEEE Asia Pacific Microwave Conference (APMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108238064},
    year = {2017},
    month = {11},
    day = {13},
    doi = {10.1109/APMC.2017.8251384},
    eventdate = {2017-11-13/2017-11-16},
    eventtitle = {IEEE Asia Pacific Microwave Conference (APMC)},
    faupublication = {yes},
    pages = {89--92},
    peerreviewed = {Yes},
    title = {Error Compensation of the Temperature Influence on Radar based Displacement Measurements},
    type = {Konferenzschrift},
    venue = {Kuala Lumpur, Malaysia},
    }
  • F. Michler, S. Lindner, F. Lurz, S. Erhardt, R. Weigel, and A. Koelpin, "Zero-Bias Schottky Power Detector Design for Six-Port based Radar Systems" in European Microwave Conference, Nürnberg, Germany, 2017. [DOI] [Bibtex]
    @inproceedings{michler2017,
    author = {Michler, Fabian and Lindner, Stefan and Lurz, Fabian and Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108331564},
    year = {2017},
    month = {10},
    day = {08},
    doi = {10.23919/EUMC.2017.8230841},
    eventdate = {2017-10-08/2017-10-13},
    faupublication = {yes},
    isbn = {9782874870477},
    peerreviewed = {Yes},
    title = {Zero-Bias Schottky Power Detector Design for Six-Port based Radar Systems},
    type = {Konferenzschrift},
    venue = {Nürnberg, Germany},
    }
  • A. Bauch, M. Dietz, R. Weigel, A. Hagelauer, and D. Kissinger, "A Broadband 10-95 GHz Variable Gain Amplifier in a 130 nm BiCMOS Technology" in European Microwave Integrated Circuits Conference, Nuremberg, Germany, 2017, pp. 155-158. [DOI] [Bibtex]
    @inproceedings{bauch2017,
    author = {Bauch, Andreas and Dietz, Marco and Weigel, Robert and Hagelauer, Amelie and Kissinger, Dietmar},
    booktitle = {European Microwave Integrated Circuits Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/109315404},
    year = {2017},
    month = {10},
    day = {08},
    doi = {10.23919/EUMIC.2017.8230683},
    eventdate = {2017-10-08/2017-10-13},
    faupublication = {yes},
    pages = {155--158},
    peerreviewed = {unknown},
    title = {A Broadband 10-95 GHz Variable Gain Amplifier in a 130 nm BiCMOS Technology},
    type = {Konferenzschrift},
    venue = {Nuremberg, Germany},
    }
  • C. Will, K. Shi, S. Schellenberger, T. Steigleder, F. Michler, R. Weigel, C. Ostgathe, and A. Koelpin, "Local Pulse Wave Detection using Continuous Wave Radar Systems", IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, vol. 1, iss. 2, pp. 81-89, 2017. [DOI] [Bibtex]
    @article{will2017e,
    author = {Will, Christoph and Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Michler, Fabian and Weigel, Robert and Ostgathe, Christoph and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology},
    cris = {https://cris.fau.de/converis/publicweb/publication/123402224},
    year = {2017},
    month = {10},
    day = {27},
    doi = {10.1109/JERM.2017.2766567},
    faupublication = {yes},
    issn = {2469-7249},
    journaltitle = {IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology},
    number = {2},
    pages = {81--89},
    peerreviewed = {Yes},
    title = {Local Pulse Wave Detection using Continuous Wave Radar Systems},
    type = {Article in Journal},
    volume = {1},
    }
  • F. Pflaum and A. Koelpin, "SmartHome Low Power Wireless Sensor Network with Localization Functionality" in Workshop on Resource-efficient Localization in Wireless Sensor Networks, Nürnberg, Germany, 2017. [Bibtex]
    @inproceedings{pflaum2017b,
    author = {Pflaum, Felix and Koelpin, Alexander},
    booktitle = {Workshop on Resource-efficient Localization in Wireless Sensor Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/112033064},
    year = {2017},
    month = {10},
    day = {12},
    eventdate = {2017-10-12/2017-10-12},
    eventtitle = {European Microwave Week 2017},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {SmartHome Low Power Wireless Sensor Network with Localization Functionality},
    type = {Abstract zum Vortrag},
    venue = {Nürnberg, Germany},
    }
  • V. Milella, A. Koelpin, and E. Schlücker, "Automatization of the storing-in part of a hydrogen storage system using Liquid Organic Hydrogen Carriers", Energy Technology, 2017. [DOI] [Bibtex]
    @article{milella2017,
    abstract = {Accumulating electrical energy in decentralized electrical grids is a demanding task. Preliminary works exist on charging and discharging Liquid Organic Hydrogen Carriers (LOHC). These carriers allow for storage of hydrogen by reversible hydrogenation of an aromatic compound. A challenge is the fact that the chemical process has to be conducted within the power generating infrastructure, therefore a continuous and fully automatized implementation is mandatory. In this work the fundamentals of the control and automatization of LOHC based energy storage systems is presented. For this purpose the identification of the controlled variable is done, before determining their influence on the reaction dynamics. This concludes to a fully automatized hydrogenation process whereby the conductibility of the reaction, the performance and the necessity of applying safe and functional operation modes, are shown. Derived from that, the investigations will help establishing LOHC as feasible hydrogen carriers and doing a decisive step to mid and long term energy storage systems suitable to a modern smart grid infrastructure.},
    author = {Milella, Vito-Oronzo and Koelpin, Alexander and Schlücker, Eberhard},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/120837464},
    year = {2017},
    month = {10},
    day = {05},
    doi = {10.1002/ENTE.201700519},
    faupublication = {yes},
    issn = {2194-4288},
    journaltitle = {Energy Technology},
    keywords = {LOHC},
    peerreviewed = {Yes},
    title = {Automatization of the storing-in part of a hydrogen storage system using Liquid Organic Hydrogen Carriers},
    type = {Article in Journal},
    }
  • Y. Can, "Quaternary-Vector-List for totally computational treating of switching algebraic tasks" in ICAT 2017, Sarajevo, Bosnia and Herzegovina, 2017. [Bibtex]
    @inproceedings{can2017c,
    abstract = {In this paper an advanced form of vector-list called quaternary-vector-list QVL is introduced. QVL is the computational representation of Boolean function or switching function respectively and enables the total computational treatment of switching algebraic tasks. It has advantages in terms of memory usage, simplicity, clarity and also in computation time. Furthermore, important operations as complement, intersection and union are demonstrated for the advanced QVL-arithmetic. By the use of QVL the computational utilization of the extended Basis function forms of switching function will be granted. By QVL the already available ternary-vector-list TVL is supplemented and substituted.},
    author = {Can, Yavuz},
    language = {English},
    publisher = {IEEE Supported},
    booktitle = {ICAT 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/107484124},
    year = {2017},
    month = {10},
    day = {26},
    eventdate = {2017-10-26/2017-10-28},
    eventtitle = {26. International Conference on Information, Communication and Automation Technologies ICAT '17},
    faupublication = {yes},
    keywords = {Quaternary-Vector-List,Switching Function,Normal Form,Algorithms,Combinational Circuit,Operation Rule},
    peerreviewed = {unknown},
    title = {Quaternary-Vector-List for totally computational treating of switching algebraic tasks},
    type = {Konferenzschrift},
    venue = {Sarajevo, Bosnia and Herzegovina},
    }
  • V. Issakov, J. Rimmelspacher, S. Trotta, M. Tiebout, A. Hagelauer, and R. Weigel, "A 52-to-67 GHz Dual-Core Push-Push VCO in 40-nm CMOS" in European Microwave Conference, Nuremberg, Germany, 2017, pp. 755-758. [DOI] [Bibtex]
    @inproceedings{issakov2017a,
    abstract = {

    We present a continuously tunable 52-to-67 GHz push-push dual-core voltage-controlled oscillator (VCO) in a 40 nm bulk CMOS technology. The circuit is suitable for 60 GHz FMCW radar applications requiring a continuously tunable ultra-wide modulation bandwidth. The LC-tank inductor is used to couple the two VCO cores. The fundamental frequency of the VCO can be tuned from 26 GHz to 33,5 GHz, which corresponds to a frequency tuning range (FTR) of 25%. The second harmonic is extracted in a non-invasive way using a transformer. The primary side acts simultaneously as a second harmonic filter. The VCO achieves in measurement a low phase noise of 91,8 dBc=Hz at 1 MHz offset at 62 GHz and an output power of 20 dBm. The VCO including buffers dissipates in the dual-core operation mode 60 mA from a single 1,1 V supply and consumes a chip area of 0,58 mm2.}, author = {Issakov, Vadim and Rimmelspacher, Johannes and Trotta, Saverio and Tiebout, Marc and Hagelauer, Amelie and Weigel, Robert}, language = {English}, booktitle = {European Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/111491424}, year = {2017}, month = {10}, day = {08}, doi = {10.23919/EUMC.2017.8230957}, eventdate = {2017-10-08/2017-10-13}, eventtitle = {European Microwave Conference}, faupublication = {yes}, keywords = {millimeter-wave,ultra-wideband,CMOS technology}, pages = {755--758}, peerreviewed = {Yes}, title = {A 52-to-67 GHz Dual-Core Push-Push VCO in 40-nm CMOS}, type = {Journal Article}, venue = {Nuremberg, Germany}, }

  • M. Sporer, R. Weigel, and A. Koelpin, "A 24 GHz Dual-Polarized and Robust Dielectric Rod Antenna", IEEE Transactions on Antennas and Propagation, vol. 65, iss. 12, pp. 6952-6959, 2017. [DOI] [Bibtex]
    @article{sporer2017,
    author = {Sporer, Michael and Weigel, Robert and Koelpin, Alexander},
    cris = {https://cris.fau.de/converis/publicweb/publication/108466864},
    year = {2017},
    month = {10},
    day = {20},
    doi = {10.1109/TAP.2017.2764530},
    faupublication = {yes},
    issn = {0018-926X},
    journaltitle = {IEEE Transactions on Antennas and Propagation},
    number = {12},
    pages = {6952--6959},
    peerreviewed = {Yes},
    shortjournal = {IEEE T ANTENN PROPAG},
    title = {A 24 GHz Dual-Polarized and Robust Dielectric Rod Antenna},
    volume = {65},
    }
  • S. Lindner, F. Lurz, S. Linz, R. Weigel, and A. Koelpin, "Mixer Assisted Interferometric Six-Port System for Accurate Distance Measurements" in European Radar Conference, Nürnberg, Germany, 2017. [DOI] [Bibtex]
    @inproceedings{lindner2017,
    author = {Lindner, Stefan and Lurz, Fabian and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    booktitle = {European Radar Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/107173264},
    year = {2017},
    month = {10},
    day = {11},
    doi = {10.23919/EURAD.2017.8249204},
    eventdate = {2017-10-11/2017-10-13},
    faupublication = {yes},
    isbn = {9782874870491},
    peerreviewed = {Yes},
    title = {Mixer Assisted Interferometric Six-Port System for Accurate Distance Measurements},
    type = {Konferenzschrift},
    venue = {Nürnberg, Germany},
    }
  • S. Mueller, R. Weigel, and A. Koelpin, "A Survey on Analog-to-Digital Converter Performance with Respect to Ionizing Radiation" in European Conference on Radiation and Its Effects on Components and Systems (RADECS), Geneva, Switzerland, 2017. [Bibtex]
    @inproceedings{mueller2017a,
    author = {Mueller, Steffen and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {European Conference on Radiation and Its Effects on Components and Systems (RADECS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/121286264},
    year = {2017},
    month = {10},
    day = {02},
    eventdate = {2017-10-02/2017-10-06},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {A Survey on Analog-to-Digital Converter Performance with Respect to Ionizing Radiation},
    type = {Konferenzschrift},
    url = {http://inspirehep.net/record/1729617},
    venue = {Geneva, Switzerland},
    }
  • M. Völkel, M. Dietz, R. Weigel, A. Hagelauer, and D. Kissinger, "A Low-Power 60-GHz Integrated Sixport Receiver Front-End in a 130-nm BiCMOS Technology" in European Microwave Integrated Circuits Conference, Nürnberg, 2017, pp. 73-76. [DOI] [Bibtex]
    @inproceedings{voelkel2017a,
    abstract = {Abstract—In this paper a 60 GHz monolithic low-power sixport
    receiver front-end for high precision industrial radar systems is
    presented. The measurement principle is based on the passive
    superposition and power detection of two incident millimeterwave
    signals. The integrated receiver has been designed using
    a 0.13µm SiGe BiCMOS process from IHP (SG13G2) and
    includes a low noise amplifier (LNA), the passive sixport structure
    and four detectors. The signal processing in the baseband is
    done with an ADC-board designed with components from Texas
    Instruments and a Cyclone IV FPGA board. The integrated
    receiver circuit has a size of 1320µm x 950µm and a low power
    consumption of 73mW from a 3.3V supply.
    ~}, author = {Völkel, Matthias and Dietz, Marco and Weigel, Robert and Hagelauer, Amelie and Kissinger, Dietmar}, language = {English}, booktitle = {European Microwave Integrated Circuits Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/108863304}, year = {2017}, month = {10}, day = {10}, doi = {10.23919/EUMIC.2017.8230663}, eventdate = {2017-10-08/2017-10-13}, faupublication = {yes}, keywords = {industrial radar; interferometer; phase measurement; sixport; low power; SiGe BiCMOS}, pages = {73--76}, peerreviewed = {unknown}, title = {A Low-Power 60-GHz Integrated Sixport Receiver Front-End in a 130-nm BiCMOS Technology}, type = {Konferenzschrift}, venue = {Nürnberg}, }
  • N. Duda and A. Koelpin, "Sensor node design for animal tracking in resources limited wireless sensor networks" in Workshop on Resource-efficient Localization in Wireless Sensor Networks, Nürnberg, Germany, 2017. [Bibtex]
    @inproceedings{duda2017,
    author = {Duda, Niklas and Koelpin, Alexander},
    booktitle = {Workshop on Resource-efficient Localization in Wireless Sensor Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/120886964},
    year = {2017},
    month = {10},
    day = {12},
    eventdate = {2017-10-12/2017-10-12},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Sensor node design for animal tracking in resources limited wireless sensor networks},
    type = {Abstract zum Vortrag},
    venue = {Nürnberg, Germany},
    }
  • M. Völkel, H. Hirsch, M. Dietz, R. Weigel, A. Hagelauer, and D. Kissinger, "A Low-Power 120-GHz Integrated Sixport Receiver Front-End with Digital Adjustable Gain in a 130-nm BiCMOS Technology" in IEEE Bipolar/BiCMOS Circuits and Technology Meeting, Miami, FL, USA, 2017, pp. 82-85. [DOI] [Bibtex]
    @inproceedings{voelkel2017b,
    abstract = {In this paper a 120GHz monolithic low-power
    sixport receiver front-end including two variable gain amplifiers,
    a passive sixport network, four detectors and a digital serial
    interface (SPI) is presented. The measurement principle is based
    on the additive superposition of two incident millimeter-wave
    signals, whereas the superposition must be fulfilled under special
    conditions. After power detection, the quadrature components
    can be extracted. The proposed measurement system is well
    suited for industrial radar applications, as well as for biomedical
    applications and it is further more well suited for communication
    systems. The receiver has been designed using a 0.13μm SiGe
    BiCMOS process from IHP (SG13G2). The whole integrated
    circuit has a size of 1560μm x 900μm and only consumes
    102.3mW from a 3.3V supply. The receiver exhibits a 1 dB
    compression point of -13dBm at the center frequency. The
    bandwidth is 15.5 GHz and covers the lower part of the D-Band.
    The gain of the input amplifier can be adjusted from 3 to 16 dB
    by a digital interface. The maximum power consumption of the
    VGA is 46.2mW.}, author = {Völkel, Matthias and Hirsch, Hartmut and Dietz, Marco and Weigel, Robert and Hagelauer, Amelie and Kissinger, Dietmar}, language = {English}, booktitle = {IEEE Bipolar/BiCMOS Circuits and Technology Meeting}, cris = {https://cris.fau.de/converis/publicweb/publication/123561284}, year = {2017}, month = {10}, day = {19}, doi = {10.1109/BCTM.2017.8112916}, eventdate = {2017-10-19/2017-10-21}, eventtitle = {IEEE Bipolar/BiCMOS Circuits and Technology Meeting}, faupublication = {yes}, keywords = {industrial radar; communication receiver; interferometer; phase measurement; sixport; low power; SiGe BiCMOS; millimeter-wave}, pages = {82--85}, peerreviewed = {Yes}, title = {A Low-Power 120-GHz Integrated Sixport Receiver Front-End with Digital Adjustable Gain in a 130-nm BiCMOS Technology}, type = {Konferenzschrift}, venue = {Miami, FL, USA}, }
  • C. Will, S. Linz, S. Mann, F. Lurz, S. Lindner, R. Weigel, and A. Koelpin, "A 24 GHz Waveguide based Radar System using an Advanced Algorithm for I/Q Offset Cancelation", Advances in Radio Science, vol. Kleinheubacher Berichte 2016, iss. 15, 2017. [DOI] [Bibtex]
    @article{will2017d,
    abstract = {Precise position measurement with micrometer accuracy plays an important role in modern industrial applications. Herewith, a guided wave Six-Port interferometric radar system is presented. Due to limited matching and discontinuities in the radio frequency (RF) part of the system, the designers have to deal with DC offsets. The offset voltages in the baseband lead to worse relative modulation dynamics relating to the full scale range of the analog-to-digital converters and  thus, considerably degrade the system performance. While common cancelation techniques try to estimate and extinguish the DC offsets directly, the proposed radar system is satisfied with equalizing both DC offsets for each of the two differential baseband signal pairs. Since the complex representation of the baseband signals is utilized for a subsequent arctangent demodulation, the proposed offset equalization implicates a centering of the in-phase and quadrature (I/Q) components of the received signal, which is sufficient to simplify the demodulation and improve the phase accuracy. Therefore, a standard Six-Port radar system is extended and a variable phase shifter plus variable attenuators are inserted at different positions. An intelligent algorithm adjusts these configurable components to achieve optimal I/Q offset cancelation.},
    author = {Will, Christoph and Linz, Sarah and Mann, Sebastian and Lurz, Fabian and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/108439584},
    year = {2017},
    month = {10},
    day = {25},
    doi = {10.5194/ARS-15-249-2017},
    faupublication = {yes},
    issn = {1684-9973},
    journaltitle = {Advances in Radio Science},
    number = {15},
    peerreviewed = {unknown},
    series = {Advances in Radio Science},
    title = {A 24 GHz Waveguide based Radar System using an Advanced Algorithm for I/Q Offset Cancelation},
    type = {online publication},
    volume = {Kleinheubacher Berichte 2016},
    }
  • M. Frank, R. Weigel, and A. Koelpin, "A Multilayer Reconfigurable Transmitarray in K-Band for Beam Steering Applications" in International Conference on Electromagnetics in Advanced Applications (ICEAA 2017), Verona, Italy, 2017. [DOI] [Bibtex]
    @inproceedings{frank2017a,
    abstract = {There are many different radar applications which require a change in the direction of the radiation beam, for example in order to separate signals coming from different directions or to track targets. A change in the main beam direction is usually realized by a mechanical rotation of the antenna or electronically by using phased array systems.
    The work presented in this paper is focused on a less common approach to realize beam steering functionality, the so called transmitarray.
    The transmitarray is built of several unit cells and is placed in front of a focal source. Each unit cell includes two radiation structures to receive the signal coming from the source on one side and to retransmit it on the other side with a distinct phase shift. The superposition of the signal contributions of all array elements leads to a certain radiation pattern of the whole structure. By individually adjusting the phase shifts of each unit cell the desired radiation pattern can be realized.
    The realization of a transmitarray can be done in two steps. First the design of a unit cell which provides the capability of performing the phase shifts has to be done. Afterwards the array synthesis is done by combining several unit cells.
    The unit cell used in this approach is derived from previous research with significant improvements and is supposed to work in the 24 GHz ISM band. A continuous phase range is obtained by loading patches with varactor diodes on the outer layers of a layer stack consisting of two thin laminates of RO4350 and a metal sheet in between. Both, metal sheet and second metal layer of the laminate have apertures inside to provide coupling from one patch to the other. By applying a voltage difference between patch and ground plane the capacity of the varactor diode is changed. This detunes the whole structure and leads to a change in the transmission phase. To obtain the desired continuous phase range of 360° several unit cells are placed in series resulting in a multilayer structure.
    The functionality of the designed unit cell has been verified in simulation and measurement.
    In the next step a 5 x 1 array has been synthesized and designed for a +/- 30° beam steering range with CST MWS. Measurements of the radiation pattern for several combinations of the five tuning voltages have been performed with a measurement setup consisting of two horn antennas and a rotation stage.
    A +/- 30° beam steering range has been successfully confirmed.
    The designed transmitarray at 24 GHz differs from previous approaches by combining a continuous phase range of the unit cells with a working frequency in the K-band.}, author = {Frank, Martin and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {International Conference on Electromagnetics in Advanced Applications (ICEAA 2017)}, cris = {https://cris.fau.de/converis/publicweb/publication/118952284}, year = {2017}, month = {10}, day = {11}, doi = {10.1109/ICEAA.2017.8065361}, eventdate = {2017-09-11/2017-09-15}, faupublication = {yes}, keywords = {Transmitarray; Reconfigurable Antenna; Beam Steering}, peerreviewed = {unknown}, title = {A Multilayer Reconfigurable Transmitarray in K-Band for Beam Steering Applications}, type = {Konferenzschrift}, venue = {Verona, Italy}, }
  • S. Erhardt, R. Weigel, and A. Koelpin, "Receiving GSM Broadcast Channels with an Ultra-Low Power Sub-GHz Transceiver" in European Microwave Conference, Nürnberg, Germany, 2017, pp. 380-383. [DOI] [Bibtex]
    @inproceedings{erhardt2017,
    abstract = {Mobile phone front-end and baseband modules are hard to obtain on the market for end customers. Thus, software defined radios are widely used in research and development, enabling many opportunities for digital signal processing. In this publication a novel option to receive GSM signals is suggested by using an ultra-low power Sub-GHz transceiver in a legacy mode. The device outputs raw demodulated bits while the signal processing is realized in software. The functionality is proven and quantified by measurements.},
    author = {Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    booktitle = {European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108468184},
    year = {2017},
    month = {10},
    day = {10},
    doi = {10.23919/EUMC.2017.8230869},
    eventdate = {2017-10-10/2017-10-12},
    faupublication = {yes},
    pages = {380--383},
    peerreviewed = {Yes},
    title = {Receiving GSM Broadcast Channels with an Ultra-Low Power Sub-GHz Transceiver},
    type = {Konferenzschrift},
    venue = {Nürnberg, Germany},
    }
  • S. Mueller, S. Danzeca, R. Garcia Alía, M. Brugger, R. Weigel, and A. Koelpin, "Advanced In-Situ Instrumentation of RF Circuits for Mixed-Field Irradiation Testing Purpose" in European Conference on Radiation and its Effects on Components and Systems (RADECS), Geneva, Switzerland, 2017. [Bibtex]
    @inproceedings{mueller2018,
    author = {Mueller, Steffen and Danzeca, Salvatore and Garcia Alía, Rubén and Brugger, Markus and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {European Conference on Radiation and its Effects on Components and Systems (RADECS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106122764},
    year = {2017},
    month = {10},
    day = {02},
    eventdate = {2017-10-02/2017-10-06},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Advanced In-Situ Instrumentation of RF Circuits for Mixed-Field Irradiation Testing Purpose},
    type = {Konferenzschrift},
    url = {http://inspirehep.net/record/1729616},
    venue = {Geneva, Switzerland},
    }
  • D. Wust, M. Biglari, J. Knödtel, M. Reichenbach, C. Söll, and D. Fey, "Prototyping Memristors in Digital Systems with an FPGA-Based Testing Environment" in Power and Timing Modeling, Optimization and Simulation (PATMOS), 2017 27th International Symposium on, Thessaloniki, Greece, 2017, pp. 1-7. [DOI] [Bibtex]
    @inproceedings{wust2017a,
    abstract = {
    Toward integrating memristors in CMOS-based designs flexible prototyping environments are necessary. However, research in digital memristive systems so far lacks an adequate testing platform for real world devices. To achieve better handson experience, we developed a flexible FPGA-based solution which allows to link memristors with arbitrary compute units such as MIPS, ARM processor cores or own custom designs. The testing environment is comprised of two main components: a dedicated hardware interface circuit for steering discrete memristor devices and a memory controller as IP core establishing the communication with the hardware interface utilizing an easy-to-use AXI interface. Furthermore, in order to integrate the prototyping platform in processing systems a C API is supplied. This testing environment lays the foundation for integrating memristors in future hybrid CMOS-based SoCs. The platform is put into practice for evaluating a ternary processor on physical hardware using memristors as multi-level storage cells.
    }, author = {Wust, Daniel and Biglari, Mehrdad and Knödtel, Johannes and Reichenbach, Marc and Söll, Christopher and Fey, Dietmar}, language = {English}, publisher = {IEEE}, booktitle = {Power and Timing Modeling, Optimization and Simulation (PATMOS), 2017 27th International Symposium on}, cris = {https://cris.fau.de/converis/publicweb/publication/119528024}, year = {2017}, month = {09}, day = {25}, doi = {10.1109/PATMOS.2017.8106978}, eventdate = {2017-09-25/2017-09-27}, eventtitle = {International Symposium on Power and Timing Modeling, Optimization and Simulation}, faupublication = {yes}, isbn = {9781509064625}, keywords = {memristor test platform; memristive computing; FPGA; off-the-shelf devices}, pages = {1--7}, peerreviewed = {Yes}, title = {Prototyping Memristors in Digital Systems with an FPGA-Based Testing Environment}, type = {Journal Article}, url = {http://ieeexplore.ieee.org/document/8106978/}, venue = {Thessaloniki, Greece}, }
  • C. Will, M. Sporer, N. Sebald, J. Fuchs, R. Weigel, and A. Koelpin, "Radarbasiertes Structural Health Monitoring der Rotorblätter von Windkaftanlagen" in Kleinheubacher Tagung, Miltenberg, Germany, 2017. [Bibtex]
    @inproceedings{will2017b,
    author = {Will, Christoph and Sporer, Michael and Sebald, Nina and Fuchs, Jonas and Weigel, Robert and Koelpin, Alexander},
    publisher = {URSI},
    booktitle = {Kleinheubacher Tagung},
    cris = {https://cris.fau.de/converis/publicweb/publication/123490664},
    year = {2017},
    month = {09},
    day = {25},
    eventdate = {2017-09-25/2017-09-27},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Radarbasiertes Structural Health Monitoring der Rotorblätter von Windkaftanlagen},
    type = {Abstract zum Vortrag},
    venue = {Miltenberg, Germany},
    }
  • T. Reißland, A. Koelpin, and R. Weigel, "Target Recovery from Randomly Distributed Radars using Compressed Sensing Techniques" in Kleinheubacher Tagung, Miltenberg, Germany, 2017. [Bibtex]
    @inproceedings{reissland2017,
    abstract = {In highly automated industrial applications radar sensor systems already play an important role. For future applications, good knowledge about the three-dimensional environment of physically acting industrial systems will be beneficial, if not necessary. For this reason, the use of distributed radar systems to gain precise knowledge of the systems environment and its work pieces is proposed.

    In the literature only few approaches for three-dimensional radar target recovery in the short range can be found. Furthermore, these approaches presume different kinds of regular patterns in which the radar sensors must be placed. This is obviously contrary to the requirements of e.g. industrial robots which can be moved on arbitrary trajectories. The most challenging problem when it comes to target recovery from randomly distributed radar sensors is the high computational effort which has to be spent.

    In this work an algorithm is presented which aims at recovering several point targets from as few as possible radar measurements. The whole work is based on simulations and analytical considerations. Each radar uses well-known frequency modulated continuous waveform signals to gain information in range direction. As stated in the title the recovering is carried out by a compressed sensing algorithm. To use this algorithm the whole problem has to be transformed into a linear system of equations, small enough to be solved by commercially available computers in an amount of time which is suited for the application. This linear equation eventually consists of the received radar signals, a measurement matrix and the reflectivity of assumed targets located in a-priori defined voxels. As the number of voxels which have to be taken into account increases drastically with the desired resolution, an iterative approach had to be developed to limit the algorithms requirements in terms of computational effort. Finally, different suited recovery algorithms were compared in terms of robustness.}, author = {Reißland, Torsten and Koelpin, Alexander and Weigel, Robert}, language = {English}, booktitle = {Kleinheubacher Tagung}, cris = {https://cris.fau.de/converis/publicweb/publication/112596924}, year = {2017}, month = {09}, day = {25}, eventdate = {2017-09-25/2017-09-27}, faupublication = {yes}, keywords = {Radar,Compressed Sensing,Imaging}, peerreviewed = {Yes}, title = {Target Recovery from Randomly Distributed Radars using Compressed Sensing Techniques}, type = {Abstract zum Vortrag}, venue = {Miltenberg, Germany}, }

  • B. Sanftl, M. Trautmann, R. Weigel, and A. Koelpin, "Simultane Übertragung von Leistung und Daten über induktiv gekoppelte Spulen mittels OFDM" in Kleinheubacher Tagung 2017, Miltenberg, Germany, 2017. [Bibtex]
    @inproceedings{sanftl2017a,
    author = {Sanftl, Benedikt and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Kleinheubacher Tagung 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/124256924},
    year = {2017},
    month = {09},
    day = {26},
    eventdate = {2017-09-25/2017-09-27},
    eventtitle = {Kleinheubacher Tagung 2017},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Simultane Übertragung von Leistung und Daten über induktiv gekoppelte Spulen mittels OFDM},
    type = {Abstract zum Vortrag},
    venue = {Miltenberg, Germany},
    }
  • C. Carlowitz, T. Girg, H. Ghaleb, and X. Du, "Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS)", Frequenz, vol. 71, iss. 9-10, p. 449, 2017. [DOI] [Bibtex]
    @article{carlowitz2017,
    abstract = {For ultra-high speed communication systems at high center frequencies above 100 GHz, we propose a disruptive change in system architecture to address major issues regarding amplifier chains with a large number of amplifier stages. They cause a high noise figure and high power consumption when operating close to the frequency limits of the underlying semiconductor technologies. Instead of scaling a classic homodyne transceiver system, we employ repeated amplification in single-stage amplifiers through positive feedback as well as synthesizer-free self-mixing demodulation at the receiver to simplify the system architecture notably. Since the amplitude and phase information for the emerging oscillation is defined by the input signal and the oscillator is only turned on for a very short time, it can be left unstabilized and thus come without a PLL. As soon as gain is no longer the most prominent issue, relaxed requirements for all the other major components allow reconsidering their implementation concepts to achieve further improvements compared to classic systems. This paper provides the first comprehensive overview of all major design aspects that need to be addressed upon realizing a SPARS-based transceiver. At system level, we show how to achieve high data rates and a noise performance comparable to classic systems, backed by scaled demonstrator experiments. Regarding the transmitter, design considerations for efficient quadrature modulation are discussed. For the frontend components that replace PA and LNA amplifier chains, implementation techniques for regenerative sampling circuits based on super-regenerative oscillators are presented. Finally, an analog-to-digital converter with outstanding performance and complete interfaces both to the analog baseband as well as to the digital side completes the set of building blocks for efficient ultra-high speed communication.},
    author = {Carlowitz, Christian and Girg, Thomas and Ghaleb, Hatem and Du, Xuan-Quang},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/118207804},
    year = {2017},
    month = {09},
    doi = {10.1515/FREQ-2017-0163},
    faupublication = {yes},
    issn = {0016-1136},
    journaltitle = {Frequenz},
    keywords = {front-end circuits and systems; wireless RF components and systems; high-data-rate communications; superregenerative receivers},
    number = {9-10},
    pages = {449},
    peerreviewed = {Yes},
    shortjournal = {FREQUENZ},
    title = {Efficient Ultra-High Speed Communication with Simultaneous Phase and Amplitude Regenerative Sampling (SPARS)},
    volume = {71},
    }
  • M. Trautmann, M. Ohlendorf, B. Sanftl, R. Weigel, and A. Koelpin, "Dimensioning and Comparison of Common Compensation Topologies for IPT Systems" in 2017 IEEE International Symposium on Circuits and Systems (ISCAS), Baltimore, MD, USA, 2017, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{trautmann2017a,
    abstract = {This paper presents the dimensioning as well as the comparison of common compensation topologies for inductive power transfer (IPT) systems. A compensation is needed on the primary as well as the secondary side. It consists of a capacitor (parallel or series) in the simplest case or a combination of reactive components (like LCC). This work is the first compilation of the dimensioning, considering all potential combinations of these three compensation possibilities. The five most promising solutions are simulated and the results are compared for constant current- and voltage-operation with varying loads as well as different coupling factors. Finally the different topologies are compared by selected criteria and evaluated accordingly.},
    author = {Trautmann, Martin and Ohlendorf, Marius and Sanftl, Benedikt and Weigel, Robert and Koelpin, Alexander},
    booktitle = {2017 IEEE International Symposium on Circuits and Systems (ISCAS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108243124},
    year = {2017},
    month = {09},
    day = {28},
    doi = {10.1109/ISCAS.2017.8050511},
    eventdate = {2017-05-28/2017-10-31},
    eventtitle = {IEEE International Symposium on Circuits and Systems (ISCAS)},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Dimensioning and Comparison of Common Compensation Topologies for IPT Systems},
    type = {Konferenzschrift},
    venue = {Baltimore, MD, USA},
    }
  • D. Werner, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "Bedarfsorientierte LED-Beleuchtung in der Milchviehhaltung – Erarbeitung einer neuen Bewertungsgrundlage" in 13. Tagung Bau, Technik und Umwelt in der landwirtschaftlichen Nutztierhaltung, Hohenheim, 2017. [Bibtex]
    @inproceedings{werner2017a,
    author = {Werner, Daniel and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {13. Tagung Bau, Technik und Umwelt in der landwirtschaftlichen Nutztierhaltung},
    cris = {https://cris.fau.de/converis/publicweb/publication/203223822},
    year = {2017},
    month = {09},
    day = {18},
    eventdate = {2017-09-18/2017-09-20},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Bedarfsorientierte LED-Beleuchtung in der Milchviehhaltung – Erarbeitung einer neuen Bewertungsgrundlage},
    type = {Konferenzschrift},
    venue = {Hohenheim},
    }
  • L. Zimmermann, R. Weigel, and G. Fischer, "Fusion of Nonintrusive Environmental Sensors for Occupancy Detection in Smart Homes", IEEE Internet of Things, vol. 5, iss. 4, pp. 2343-2352, 2017. [DOI] [Bibtex]
    @article{zimmermann2017a,
    abstract = {We presented an approach to detect and count occupants using a fusion of environmental sensors from an indoor air quality measurement system. Environmental sensors, as opposed to motion detectors, are nonintrusive, easy to install, low cost, detect nonmoving occupants, do not have dead spots, and can even infer the number of occupants. For this paper, we conducted measurements of carbon dioxide, volatile organic compounds (VOCs), air temperature, and air relative humidity in four student apartments for a total of 49 days. We extracted features from the environmental sensors and selected subsets using correlation-based feature selection. Subsequently, we performed a comparison of the supervised learning models repeated incremental pruning to produce error reduction, naïve Bayes (NB), C4.5 decision tree, logistic regression, k-nearest neighbors, and random forest. We further proposed a method to greatly reduce time and effort of collecting training data in residential buildings. The results indicated that the predictive power of VOC sensing is comparable to that of carbon dioxide. With a simple NB classifier, our approach detected occupancy and estimated the number of occupants with an accuracy of 81.1 % and 64.7 %, respectively.},
    author = {Zimmermann, Lars and Weigel, Robert and Fischer, Georg},
    language = {English},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/123885344},
    year = {2017},
    month = {09},
    day = {13},
    doi = {10.1109/JIOT.2017.2752134},
    faupublication = {yes},
    issn = {2327-4662},
    journaltitle = {IEEE Internet of Things},
    keywords = {Temperature sensors; Temperature measurement; Air quality; Sensor systems; Intelligent sensors; Humidity; Environmental sensing; indoor air quality; occupancy detection; sensor fusion; smart homes; supervised learning; volatile organic compounds (VOCs)},
    number = {4},
    pages = {2343--2352},
    peerreviewed = {Yes},
    title = {Fusion of Nonintrusive Environmental Sensors for Occupancy Detection in Smart Homes},
    type = {Article in Journal},
    volume = {5},
    }
  • D. Ahmed, J. Kirchner, and G. Fischer, "Wave Propagation with HBC in a Human Arm Model" in 2017 IEEE International Symposium on Medical Measurements and Applications (MeMeA), Rochester, MN, USA, 2017, pp. 448-452. [DOI] [Bibtex]
    @inproceedings{ahmed2017a,
    abstract = {Today’s interest in health assistance systems, sport activities, person’s vital signs observing and remote patient monitoring require distributing various types of sensors at specific places across the human body. These sensors might be used to measure temperature, blood pressure level, blood glucose level and the like. This implies collecting the data generated at the distributed sensors in a wireless Body Area Network (BAN) and fusing these data at an access point (e.g. wristwatch) and then to a central processing unit (i.e., PC) for diagnosing, as shown in Fig. 1. However, sending data wirelessly is typically a very energy intensive task implying large batteries. Hence, BAN networks have been developed by IEEE 802.15.Task Group (TG6) to serve a variety of applications including medical, consumer lifestyle and the like at a low power consumption. Human Body Communications (HBC) is one technique used in BAN networks that utilizes the human body as a transmission medium to transfer data between sensors on, in or at the proximity of the human body using electrodes (i.e., electrical conductors).},
    author = {Ahmed, Doaa and Kirchner, Jens and Fischer, Georg},
    language = {English},
    booktitle = {2017 IEEE International Symposium on Medical Measurements and Applications (MeMeA)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109721304},
    year = {2017},
    month = {07},
    day = {20},
    doi = {10.1109/MEMEA.2017.7985918},
    eventdate = {2017-05-07/2017-05-10},
    faupublication = {yes},
    isbn = {9781509029846},
    keywords = {Body Area Communication; Galvanic Coupling; Human Arm Model},
    pages = {448--452},
    peerreviewed = {Yes},
    title = {Wave Propagation with HBC in a Human Arm Model},
    type = {Konferenzschrift},
    venue = {Rochester, MN, USA},
    }
  • D. Ahmed, J. Kirchner, and G. Fischer, "Wave Propagation with Human Body Communications in BANs" in 2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO), Sevilla, Spain, 2017, pp. 16-18. [DOI] [Bibtex]
    @inproceedings{ahmed2017,
    abstract = {Today's interest in health assistance systems, sport activities and remote patient monitoring require distributing various types of sensors at specific places across the human body. These sensors might be used to measure temperature, blood pressure level, blood glucose level and the like. This implies collecting the data generated at the distributed sensors in a wireless Body Area Network (BAN) and fusing these data at a central processing unit, which transfers the data, if needed, to a hospital or medical center for diagnosing. Whereas, transmission could be done for real time or stored data depending on the application scenario. However, sending data wirelessly is typically a very energy intensive task implying large batteries. Hence, BAN networks have been developed by IEEE 802.15.Task Group (TG6) to serve a variety of applications including medical, consumer lifestyle and entertainment applications at low power consumption. Human Body Communication is a non-RF propagation system in BAN network that utilizes the human body as a transmission medium to transfer data between several points inside, on or sometimes near the human body using electrodes, rather than antennas based on near field communication and quasistatic field approximations.},
    author = {Ahmed, Doaa and Kirchner, Jens and Fischer, Georg},
    language = {English},
    booktitle = {2017 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications (NEMO)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108446624},
    year = {2017},
    month = {07},
    day = {03},
    doi = {10.1109/NEMO.2017.7964172},
    eventdate = {2017-05-17/2017-05-19},
    faupublication = {yes},
    isbn = {9781509048373},
    keywords = {Body Area Communication; Galvanic Coupling; Human Arm Model},
    pages = {16--18},
    peerreviewed = {Yes},
    title = {Wave Propagation with Human Body Communications in BANs},
    type = {Konferenzschrift},
    venue = {Sevilla, Spain},
    }
  • J. Kirchner and G. Fischer, "Monitoring of Cardiac Diseases by Use of a Wearable Sensor Platform with Capacitive ECG" in 39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC), Jeju Island, Korea (Republic of), 2017. [Bibtex]
    @inproceedings{kirchner2017a,
    abstract = {The concept of a wearable sensor platform in the form of a patch for fixation at a patient’s chest is described. It is used for monitoring of cardiac diseases, which is illustrated with the detection of atrial fibrillation.},
    author = {Kirchner, Jens and Fischer, Georg},
    language = {English},
    booktitle = {39th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109722184},
    year = {2017},
    month = {07},
    day = {11},
    eventdate = {2017-07-11/2017-07-15},
    faupublication = {yes},
    keywords = {Wearable Sensors; Cardiac diseases; Atrial fibrillation},
    peerreviewed = {Yes},
    title = {Monitoring of Cardiac Diseases by Use of a Wearable Sensor Platform with Capacitive ECG},
    type = {Abstract zum Vortrag},
    venue = {Jeju Island, Korea (Republic of)},
    }
  • R. Löhr, M. Stadelmayer, J. Röber, F. Ohnhäuser, and R. Weigel, "A Combination of a Digital Foreground and Background Calibration for a 16Bit and 200MS/s Pipeline Analog-to-Digital Converter" in ECCTD, Italien, 2017. [Bibtex]
    @inproceedings{loehr2017,
    abstract = {
    High-Performance Analog-to-Digital Converter
    (ADC) have high requirements concerning sampling rate and
    linearity. Therefore a new formula is derived to determine,
    which pipeline stage dependent on the used capacitor sizes
    needs to be calibrated for the targeted linearity. Furthermore,
    a model of a 16 bit and 200MS/s pipeline ADC is described. A
    combination of a digital foreground and a digital background
    calibration is presented, which can compensate linear errors
    and achieves a DNL smaller than ±1 and a THD of -88 dB.
    }, author = {Löhr, Robert and Stadelmayer, Markus and Röber, Jürgen and Ohnhäuser, Frank and Weigel, Robert}, language = {English}, publisher = {IEEE}, booktitle = {ECCTD}, cris = {https://cris.fau.de/converis/publicweb/publication/106860204}, year = {2017}, month = {07}, faupublication = {yes}, keywords = {Pipeline ADC,modeling,common mode jump,capacitor-flip-over architecture,digital calibration,foreground,background,high resolution.}, peerreviewed = {unknown}, title = {A Combination of a Digital Foreground and Background Calibration for a 16Bit and 200MS/s Pipeline Analog-to-Digital Converter}, venue = {Italien}, }
  • F. Pflaum and A. Koelpin, "Smart Home low power wireless sensor network with localization functionality" in Workshop on Localization in Wireless Sensor Networks, Honolulu, HI, USA, 2017. [Bibtex]
    @inproceedings{pflaum2017a,
    author = {Pflaum, Felix and Koelpin, Alexander},
    language = {English},
    booktitle = {Workshop on Localization in Wireless Sensor Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/109669604},
    year = {2017},
    month = {06},
    day = {09},
    eventdate = {2017-06-04/2017-06-09},
    eventtitle = {International Microwave Symposium 2017},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Smart Home low power wireless sensor network with localization functionality},
    type = {Abstract zum Vortrag},
    venue = {Honolulu, HI, USA},
    }
  • A. Talai, R. Weigel, and A. Koelpin, "Efficient radar front-end implementation in LTCC multilayer cavity technology" in Workshop on Recent Progresses in mmW Multilayer Circuit and System Design and Packaging (MCM/SoP), Honolulu, Hawai, USA, 2017. [Bibtex]
    @inproceedings{talai2017,
    abstract = {Low Temperature Cofired Ceramics (LTCC) is a high-frequency material type that is suitable for multilayer structures and applications. Since its relative permittivity is usually in the region of 6 to 10, microwave structures can be designed in a space-saving way. The implementation of patch-antennas on LTCC, such as radar antennas at 77 GHz, require a lower permittivity in order to achieve a desirable efficiency and focusing capability. Therefore, this presentation will focus on a novel method of using the multilayer capabilities of LTCC in order to decrease the local permittivity below the antennas. Before sintering, carbon inserts are embedded on inner layers below the antennas by using an Nd:YAG laser. It will be demonstrated that these inserts are burned out completely during sintering and the cavity remains. The process requires an adaption of the sintering profile in order to reduce the sinking of the substrate in the middle of the cavity. Within this presentation, the achievable improvements on antenna beams will be presented by comparative simulation results of 77 GHz antennas with and without the embedded cavity. Furthermore, presented measurement results will verify the effects of the cavity.},
    author = {Talai, Armin and Weigel, Robert and Koelpin, Alexander},
    editor = {IEEE},
    language = {English},
    publisher = {IEEE},
    booktitle = {Workshop on Recent Progresses in mmW Multilayer Circuit and System Design and Packaging (MCM/SoP)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108240924},
    year = {2017},
    month = {06},
    day = {09},
    eventdate = {2017-06-04/2017-06-09},
    eventtitle = {IEEE/MTT-S International Microwave Symposium (IMS)},
    faupublication = {yes},
    keywords = {Multilayer; Cavity; LTCC; Antenna},
    number = {no},
    peerreviewed = {Yes},
    title = {Efficient radar front-end implementation in LTCC multilayer cavity technology},
    type = {Abstract zum Vortrag},
    venue = {Honolulu, Hawai, USA},
    volume = {vol},
    }
  • F. Trenz, R. Weigel, and D. Kissinger, "Validation of a Functional Principle for a Broadband Millimeter-Wave Power Detection Structure in a Recent BiCMOS Technology" in IEEE Radio Frequency Integrated Circuits Symposium, Honolulu, Hawaii, USA, 2017. [Bibtex]
    @inproceedings{trenz2017,
    abstract = {In this paper, a functional principle for a broadband thermal detector suited for a monolithical integration is shown. Two tantalum load resistors are heated by an input signal, while the temperature at a fixed distance is recorded on chip with a differential temperature sensing bridge. An integrated differential to single-ended stage amplifies the bridges differential voltage and makes an output voltage proportional to the input power of the detector available. The thermal resistance and capacitance between the load resistor and the sensing cell act as a low pass filter in the electrical regime. Based on this concept, a detector chip has been designed, which has been analyzed in thermal simulations. The realized detector has been characterized on-chip and bonded to a microwave substrate for a system performance estimation. Its input impedance is tuned to 50 Ohms and measured matching is better than -15dB from 10MHz to 43.5GHz. With a low supply voltage of 1.5V and its active area of around 80x36um2, the detector is suitable for an integrated power measurement solution.},
    author = {Trenz, Florian and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Radio Frequency Integrated Circuits Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/121940984},
    year = {2017},
    month = {06},
    day = {04},
    eventdate = {2017-06-04/2017-06-06},
    faupublication = {yes},
    keywords = {Detectors;Envelope detectors;Monolithic integrated circuits;BiCMOS integrated circuits;Thermodynamics},
    peerreviewed = {Yes},
    title = {Validation of a Functional Principle for a Broadband Millimeter-Wave Power Detection Structure in a Recent BiCMOS Technology},
    type = {Konferenzschrift},
    venue = {Honolulu, Hawaii, USA},
    }
  • V. Issakov, J. Rimmelspacher, A. Werthof, A. Hagelauer, and R. Weigel, "Experimental Study on Substrate Coupling in Bulk Silicon and RF-SOI CMOS up to 110 GHz" in IEEE MTT-S International Microwave Symposium 2017, Honolulu, Hawaii, USA, USA, 2017, p. 3. [DOI] [Bibtex]
    @inproceedings{issakov2017,
    abstract = {Interferences injected to an RF circuit may strongly deteriorate the electrical performance. Parasitic coupling via substrate is one of the dominant interference transmission mechanisms in highly integrated systems. The effect of substrate coupling becomes more critical at higher circuit frequencies. This poses a particular challenge for highly integrated millimeterwave systems, since isolation techniques become less efficient with an increasing operating frequency. This paper presents an experimental study on coupling via bulk silicon and RFSOI substrates. We investigate in measurement up to 110 GHz efficiency of several isolation techniques, such as triple-well, p+ and n+ guard-rings and use of undoped highly resistive region. Additionally, RF-SOI substrates are known to be beneficial for higher crosstalk isolation. However, also this isolation degrades at higher frequencies. Hence, we investigate in measurement up to 110 GHz the isolation via low-resistivity and high-resistivity trap-rich SOI substrate variants. Test structures were realized in 40 nm bulk CMOS and 45 nm RF-SOI technology nodes.},
    author = {Issakov, Vadim and Rimmelspacher, Johannes and Werthof, Andreas and Hagelauer, Amelie and Weigel, Robert},
    language = {English},
    booktitle = {IEEE MTT-S International Microwave Symposium 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/108607444},
    year = {2017},
    month = {06},
    day = {04},
    doi = {10.1109/MWSYM.2017.8058792},
    eventdate = {2017-06-04/2017-06-09},
    eventtitle = {International Microwave Symposium 2017},
    faupublication = {yes},
    keywords = {millimeter-wave,Substrate-coupling effects,CMOS,Silicon-on-Insulator.},
    pages = {3},
    peerreviewed = {unknown},
    title = {Experimental Study on Substrate Coupling in Bulk Silicon and RF-SOI CMOS up to 110 GHz},
    type = {Journal Article},
    venue = {Honolulu, Hawaii, USA, USA},
    }
  • B. Sanftl, M. Trautmann, M. Kleinhenz, R. Weigel, and A. Koelpin, "Increased Data Rate using Higher-order Digital Modulation for Simultaneous Inductive Data and Power Transfer Systems" in IEEE MTT-S Wireless Power Transfer Conference 2017, Taipeh, Taiwan, 2017, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{sanftl2017,
    abstract = {This paper presents an improved communication architecture with increased data rate for inductive power transfer (IPT) systems. The main challenge is to enable robust and reliable communication within the noisy environment of the power transfer. Therefore the communication channel, consisting of the coupled pair of coils of the inductive power transfer system is analysed. From this a frequency band with an excellent available signal to noise ratio was identified and is exploited using higher-order digital modulation schemes as n-th quadrature amplitude modulation or phase shift keying to increase the data rate. Furthermore the bandwidth of the system shall be extended by the utilisation of an equalizer. The implemented system using a software defined radio approach will be presented and it will be shown that reliable and fast communication is possible in this harsh environment.},
    author = {Sanftl, Benedikt and Trautmann, Martin and Kleinhenz, Markus and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE MTT-S Wireless Power Transfer Conference 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/108365004},
    year = {2017},
    month = {06},
    day = {22},
    doi = {10.1109/WPT.2017.7953843},
    eventtitle = {2017 IEEE Wireless Power Transfer Conference (WPTC)},
    faupublication = {yes},
    keywords = {Inductive power transfer,inductive data communication,power filters,wireless communication,industrial electronics,digital modulation},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Increased Data Rate using Higher-order Digital Modulation for Simultaneous Inductive Data and Power Transfer Systems},
    type = {Konferenzschrift},
    venue = {Taipeh, Taiwan},
    }
  • R. Weiss, A. Itzke, and R. Weigel, "Current Measurement of Flat Conductors with a Circular Array of Magnetic Sensors" , , Germany, 2017. [DOI] [Bibtex]
    @inproceedings{weiss2017,
    author = {Weiss, Roland and Itzke, Alexander and Weigel, Robert},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/110774884},
    year = {2017},
    month = {06},
    day = {27},
    doi = {10.1109/ICDCM.2017.8001039},
    eventdate = {2017-06-27/2017-06-29},
    faupublication = {yes},
    keywords = {Sensor arrays; fluxgate sensors; flat conductor measurement; current sensing},
    peerreviewed = {unknown},
    title = {Current Measurement of Flat Conductors with a Circular Array of Magnetic Sensors},
    type = {Konferenzschrift},
    venue = {, Germany},
    }
  • J. Rimmelspacher, R. Weigel, A. Hagelauer, and V. Issakov, "36 % Frequency-Tuning-Range Dual-Core 60 GHz Push-Push VCO in 45 nm RF-SOI CMOS Technology" in IEEE MTT-S International Microwave Symposium 2017, Honolulu, HI, USA, 2017, pp. 1356-1358. [DOI] [Bibtex]
    @inproceedings{rimmelspacher2017,
    abstract = {This paper presents a millimeter-wave (mm-wave) push-push voltage-controlled oscillator (VCO) in a 45 nm RFSOI CMOS technology. The circuit aims to meet specifications for FMCW radar applications requiring an ultra-wide PLL modulation bandwidth. The fundamental output of the VCO can be tuned from 27 GHz to 39 GHz, which corresponds to frequency tuning range (FTR) of 36 %. We extract the 2nd harmonic in a non-invasive way using a transformer. The measured phase noise (PN) at 1 MHz offset from the fundamental carrier varies across the tuning range from -100 dBc/Hz to -90 dBc/Hz. The VCO including output buffers dissipates 65 mW DC power from a single 1 V supply and consumes a chip area of 0.12 mm2.},
    author = {Rimmelspacher, Johannes and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    language = {English},
    booktitle = {IEEE MTT-S International Microwave Symposium 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/111456664},
    year = {2017},
    month = {06},
    day = {04},
    doi = {10.1109/MWSYM.2017.8058865},
    eventdate = {2017-06-04/2017-06-09},
    eventtitle = {International Microwave Symposium 2017},
    faupublication = {yes},
    keywords = {millimeter-wave,ultra-wideband,CMOS technology,cutoff frequency,System-on-Chip,Silicon-on-Insulator},
    pages = {1356--1358},
    peerreviewed = {unknown},
    title = {36 % Frequency-Tuning-Range Dual-Core 60 GHz Push-Push VCO in 45 nm RF-SOI CMOS Technology},
    type = {Journal Article},
    venue = {Honolulu, HI, USA},
    }
  • M. Haberl, B. Sanftl, M. Trautmann, R. Weigel, and A. Koelpin, "A Direct RF-to-Baseband Quadrature Subsampling Receiver Using a Low Cost ADC" in 2017 IEEE Radio and Wireless Symposium (RWS), Phoenix, AZ, USA, 2017, pp. 144-146. [DOI] [Bibtex]
    @inproceedings{haberl2017,
    abstract = {This paper presents a novel receiver using direct complex subsampling. In this approach no frequency conversion is used, but therefore bandpass sampling in combination with nonuniform sampling. A special sampling pattern for the analog to digital conversion is used. The resulting sampling frequency is below the carrier frequency, like in standard bandpass sampling receivers. Therefore the requirements for the analog-digital converter (ADC) and digital signal processor (DSP) are decreased. The sample and hold stage of the ADC still has to meet the requirements for the carrier frequency. The corresponding sampling scheme and its signal processing are described. A simulation of a QPSK receiver is presented. The proposed architecture is validated using a low cost commercial-off-the-shelf (COTS) ADC along with some testing and measurements. The receiver works for the industrial, scientific and medical band (ISM) carrier frequency at 13.56 MHz, which is commonly used for short range devices like radio-frequency identification (RFID) applications.},
    author = {Haberl, Matthias and Sanftl, Benedikt and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE MTT-S},
    booktitle = {2017 IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122921084},
    year = {2017},
    month = {06},
    day = {07},
    doi = {10.1109/RWS.2017.7885970},
    eventdate = {2017-01-15/2017-01-18},
    eventtitle = {IEEE Radio and Wireless Symposium 2017},
    faupublication = {yes},
    keywords = {ADC; I/Q signal processing; nonuniform sampling; subsampling},
    pages = {144--146},
    peerreviewed = {Yes},
    title = {A Direct RF-to-Baseband Quadrature Subsampling Receiver Using a Low Cost ADC},
    venue = {Phoenix, AZ, USA},
    }
  • F. Lurz, S. Müller, S. Lindner, S. Linz, M. Gardill, R. Weigel, and A. Koelpin, "Smart Communication and Relative Localization System for Firefighters and Rescuers" in IEEE International Microwave Symposium, Honolulu, HI, USA, 2017, pp. 1421-1424. [DOI] [Bibtex]
    @inproceedings{lurz2017a,
    author = {Lurz, Fabian and Müller, Simon and Lindner, Stefan and Linz, Sarah and Gardill, Markus and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE International Microwave Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/108264244},
    year = {2017},
    month = {06},
    day = {04},
    doi = {10.1109/MWSYM.2017.8058885},
    eventdate = {2017-06-04/2017-06-09},
    faupublication = {yes},
    pages = {1421--1424},
    peerreviewed = {Yes},
    title = {Smart Communication and Relative Localization System for Firefighters and Rescuers},
    type = {Konferenzschrift},
    venue = {Honolulu, HI, USA},
    }
  • G. Fischer and A. Cwik, "CEPT SE7(17)044 Intermodulation between LTE and NB systems in the 400 MHz band", 2017. [Bibtex]
    @other{fischer2017,
    author = {Fischer, Georg and Cwik, Andrzej},
    editor = {ECO},
    cris = {https://cris.fau.de/converis/publicweb/publication/201692467},
    year = {2017},
    month = {06},
    day = {10},
    faupublication = {yes},
    keywords = {RX Intermodulation,Smart Grid,LTE M2M},
    peerreviewed = {automatic},
    title = {CEPT SE7(17)044 Intermodulation between LTE and NB systems in the 400 MHz band},
    type = {anderer},
    url = {https://cept.org/ecc/groups/ecc/wg-se/se-7/client/meeting-documents/},
    }
  • T. Fersch, R. Weigel, and A. Koelpin, "A CDMA Modulation Technique for Automotive Time-of-Flight LiDAR Systems", IEEE Sensors Journal, vol. 17, iss. 11, pp. 3507-3516, 2017. [DOI] [Bibtex]
    @article{fersch2017,
    abstract = {We present the application of optical code division multiple access (OCDMA) modulation based on optical orthogonal codes for automotive time-of-flight light detection and ranging (LiDAR) system sensors using avalanche photodiode (APD) detectors. The modulation opens the possibility to discriminate single laser transmissions. This allows the realization of additional features like enhancing the systems’ interference robustness or accelerating their scanning rate. The requirements on automotive LiDAR OCDMA modulation differs from telecommunication’s demands in several ways: The sensor must guarantee absolute laser safety; front facing devices must be able to provide reliable long range results up to a distance of 150m and beyond; and the signal is transmitted through free space. After outlining the basic functionality of the sort of sensors in consideration, the properties of the optical orthogonal codes (OOC) modulation are compared with the state of the art theoretically. The influence of OOC parameters with respect to scanning LiDAR systems is examined. The modulation technique is then demonstrated experimentally with two examples: The detection and separation of coded and traditional signals is shown using a matched filter detection algorithm. In the same way, differently coded signals can be separated from each other. Impediments of the interference suppression quality are discussed. Finally, an overview of possible applications of the proposed technique in automotive LiDAR systems is given, which are enabled by the OCDMA modulation in the first place.},
    author = {Fersch, Thomas and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE Intelligent Transportation Systems Transactions},
    cris = {https://cris.fau.de/converis/publicweb/publication/108241144},
    year = {2017},
    month = {06},
    day = {01},
    doi = {10.1109/JSEN.2017.2688126},
    faupublication = {yes},
    issn = {1530-437X},
    journaltitle = {IEEE Sensors Journal},
    keywords = {LiDAR; CDMA},
    number = {11},
    pages = {3507--3516},
    peerreviewed = {Yes},
    shortjournal = {IEEE SENS J},
    title = {A CDMA Modulation Technique for Automotive Time-of-Flight LiDAR Systems},
    volume = {17},
    }
  • A. Koelpin and J. Thielecke, "BATS: A system approach for animal tracking in resources limited wireless sensor networks" in Workshop on Localization in Wireless Sensor Networks, Honolulu, HI, USA, 2017. [Bibtex]
    @inproceedings{koelpin2017,
    author = {Koelpin, Alexander and Thielecke, Jörn},
    editor = {IEEE},
    language = {English},
    booktitle = {Workshop on Localization in Wireless Sensor Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/109189344},
    year = {2017},
    month = {06},
    day = {09},
    eventdate = {2017-06-04/2017-06-09},
    eventtitle = {International Microwave Symposium 2017},
    faupublication = {yes},
    keywords = {BATS; Sensorknoten,Ortung},
    peerreviewed = {Yes},
    title = {BATS: A system approach for animal tracking in resources limited wireless sensor networks},
    type = {Abstract zum Vortrag},
    venue = {Honolulu, HI, USA},
    }
  • C. Will, K. Shi, R. Weigel, and A. Koelpin, "Advanced Template Matching Algorithm for Instantaneous Heartbeat Detection using Continuous Wave Radar Systems" in IEEE MTT-S International Microwave Bio Conference (IMBioC), Gothenburg, Sweden, 2017. [DOI] [Bibtex]
    @inproceedings{will2017a,
    abstract = {Instantaneous heartbeat detection is a key parameter in modern vital sign monitoring. Continuous wave (CW) radar systems enable contactless measurements of the vibrations on the human skin effected by heartbeats. Since a high accuracy as well as robustness of the measurement sensor is appreciated, the belonging signal processing routine has to deal with challenging requirements. In this paper, an advanced template matching (ATM) algorithm is proposed to enhance the performance regarding instantaneous heartbeat detection using CW radar systems. Compared to common template matching algorithms, multiple heterogeneous templates are utilized in this approach, at which the appropriate template type is determined by prior feature detection. A 24 Ghz Six-Port microwave interferometer is used for vital sign measurements of a person-under-test. The functionality of the proposed algorithm is verified by a synchronous reference electrocardiogram (ECG) and its enhancement is shown by reducing the root-mean-square error (RMSE) of the interbeat intervals (IBI) compared to an ordinary template matching algorithm.},
    author = {Will, Christoph and Shi, Kilin and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE MTT-S International Microwave Bio Conference (IMBioC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/123056824},
    year = {2017},
    month = {05},
    day = {15},
    doi = {10.1109/IMBIOC.2017.7965797},
    eventdate = {2017-05-15/2017-05-17},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Advanced Template Matching Algorithm for Instantaneous Heartbeat Detection using Continuous Wave Radar Systems},
    type = {Konferenzschrift},
    venue = {Gothenburg, Sweden},
    }
  • A. El Assaad and G. Fischer, "System Archictecture for Hybrid Communication and Localization in Downlink LTE" in Hybride Kommunikations- und Ortungstechnologien für das vernetzte Fahren – Technologiestand und Ausbaupotenzial, DGON-Konvent 2017, Vertretung des Landes Sachsen-Anhalt beim Bund in Berlin, Germany, 2017. [Bibtex]
    @inproceedings{assaad2017,
    author = {El Assaad, Ahmad and Fischer, Georg},
    language = {English},
    booktitle = {Hybride Kommunikations- und Ortungstechnologien für das vernetzte Fahren – Technologiestand und Ausbaupotenzial, DGON-Konvent 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/121493284},
    year = {2017},
    month = {05},
    day = {04},
    eventdate = {2017-05-04/2017-05-05},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {System Archictecture for Hybrid Communication and Localization in Downlink LTE},
    type = {Konferenzschrift},
    venue = {Vertretung des Landes Sachsen-Anhalt beim Bund in Berlin, Germany},
    }
  • M. Völkel, M. Dietz, A. Hagelauer, R. Weigel, and D. Kissinger, "A 60-GHz Low-Noise Variable-Gain Amplifier in a 130-nm BiCMOS Technology for Sixport Applications" in IEEE International Symposium on Circuits and Systems, Baltimore, USA, 2017, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{voelkel2017,
    abstract = {Abstract—A monolithic low noise variable gain amplifier (LNA)
    operating at 60 GHz is presented. It is designed for a sixport
    receiver, which is completely integrated on a single chip. These
    chips are build in highly miniaturized sensors to measure
    distances with radar. Therefore a high performance LNA is
    indispensable. The circuit has been designed using a new 0.13 m
    SiGe BiCMOS process from IHP (SG13G2). For implementation
    a three stage architecture is chosen. Measurements show a
    tuneable gain from 16 to 24 dB at 60 GHz, an input matching of
    -17 dB and an output matching of -14 dB. The circuit consumes
    13mA from a 3.3V supply.}, author = {Völkel, Matthias and Dietz, Marco and Hagelauer, Amelie and Weigel, Robert and Kissinger, Dietmar}, language = {English}, booktitle = {IEEE International Symposium on Circuits and Systems}, cris = {https://cris.fau.de/converis/publicweb/publication/108862424}, year = {2017}, month = {05}, day = {29}, doi = {10.1109/ISCAS.2017.8050493}, eventdate = {2017-05-28/2017-05-31}, faupublication = {yes}, pages = {1--4}, peerreviewed = {unknown}, title = {A 60-GHz Low-Noise Variable-Gain Amplifier in a 130-nm BiCMOS Technology for Sixport Applications}, type = {Konferenzschrift}, venue = {Baltimore, USA}, }
  • J. Kirchner, S. Schild, and G. Fischer, "Detection of Paroxysmal Atrial Fibrillation: A Computationally Efficient Algorithm for Use in a Wearable Telemedical System" in 2017 IEEE International Sympium on Medical Measurements and Applications (MeMeA), Rochester, MN, USA, 2017, pp. 320-325. [DOI] [Bibtex]
    @inproceedings{kirchner2017,
    abstract = {For early detection of the sporadic events of paroxysmal atrial fibrillation (AF), long-term ECG monitoring and data evaluation are required. To allow energy-efficient on-device preprocessing of the data, an as simple as possible algorithm is sought. The proposed approach is based on heart frequency data only and makes use of the increased heart rate variation with the occurrence of AF. Criteria for the choice of the free parameters of this method are derived, and it is shown that, under these conditions, results are insensitive against variations of these parameters. If a compromise between sensitivity and specificity is sought, i.e. equality of these values, 89.4% are obtained in average. If instead sensitivity alone is optimized, i. e. for use with additional AF detection strategies, an average value of 99.6% is reached with specificity 38.4%. The algorithm forms the first step in the development of a computationally and thus energy efficient signal processing module for the purpose of reducing the amount of data that has to be stored or transmitted and then evaluated by the treating physician.},
    author = {Kirchner, Jens and Schild, Stefanie and Fischer, Georg},
    language = {English},
    booktitle = {2017 IEEE International Sympium on Medical Measurements and Applications (MeMeA)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109658824},
    year = {2017},
    month = {05},
    day = {07},
    doi = {10.1109/MEMEA.2017.7985896},
    eventdate = {2017-05-07/2017-05-10},
    faupublication = {yes},
    keywords = {paroxysmal atrial fibrillation detection; wearable telemedical system; sporadic event detection; long-term ECG monitoring; energy-efficient on-device data preprocessing; heart frequency data; atrial fibrillation detection strategy; energy efficient signal processing; Sensitivity; Heart rate; Electrocardiography; Optimization; Medical services; Paroxysmal Atrial Fibrillation; Electrocardiogram; Heart Rate Variability; Cardiac Diseases; Diagnostic Monitoring},
    pages = {320--325},
    peerreviewed = {Yes},
    title = {Detection of Paroxysmal Atrial Fibrillation: A Computationally Efficient Algorithm for Use in a Wearable Telemedical System},
    type = {Konferenzschrift},
    url = {http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7985896&isnumber=7985834},
    venue = {Rochester, MN, USA},
    }
  • C. Schmidt, M. Lübke, M. Dietz, R. Weigel, D. Kissinger, and A. Hagelauer, "Determination of Changes in NaCl Concentration in Aqueous Solutions Using an M-Sequence Based Sensor System" in IEEE International Microwave Bio-Conference, Göteborg, Sweden, 2017, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{schmidt2017a,
    author = {Schmidt, Christian and Lübke, Maximilian and Dietz, Marco and Weigel, Robert and Kissinger, Dietmar and Hagelauer, Amelie},
    booktitle = {IEEE International Microwave Bio-Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108383484},
    year = {2017},
    month = {05},
    day = {15},
    doi = {10.1109/IMBIOC.2017.7965786},
    eventdate = {2017-05-15/2017-05-17},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Determination of Changes in NaCl Concentration in Aqueous Solutions Using an M-Sequence Based Sensor System},
    type = {Konferenzschrift},
    venue = {Göteborg, Sweden},
    }
  • Y. Can and G. Fischer, "Extended Forms of Switching Functions" in Proceedings of ICEEE 2017, Ankara, Turkey, 2017, pp. 1-353. [DOI] [Bibtex]
    @inproceedings{can2017,
    abstract = {Two new extended forms of switching functions with the four already existing forms, which will be partly renamed, are presented in this paper. These new extended forms, the antivalence of disjunctions ADF and the equivalence of conjunctions ECF, are educed from circuit of digital logic gates and thereby their algebraic expressions are set up. For that, conversion rules which enable the transformation of a disjunction in equivalence-operation and the transformation of a conjunction in antivalence-operation with respect to the extended forms will be lay down. In  addition, new formulas for resolution of terms of ADF and ECF while retaining the form of the given function will be derived. Furthermore, relations between these six forms are described in algebra of sets if they have the same representation of disjunctions respectively conjunctions whereby the conjunctions and disjunctions have operations of the same literals. Additionally, in the case of orthogonal representation of these six function forms further relations between them result. That means, an orthogonal disjunctive form is equivalent to the orthogonal antivalence form of conjunctions and equivalent to the complement of the orthogonal  equivalence form of conjunctions. Against this, an orthogonal conjunctive form is equivalent to the orthogonal antivalence form of disjunctions and equivalent to the complement of the orthogonal equivalence form of disjunctions.},
    author = {Can, Yavuz and Fischer, Georg},
    language = {English},
    publisher = {IEEE},
    booktitle = {Proceedings of ICEEE 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/121122144},
    year = {2017},
    month = {04},
    day = {08},
    doi = {10.1109/ICEEE2.2017.7935793},
    eventdate = {2017-04-08/2017-04-10},
    eventtitle = {4th International Conference on Electrical and Electronics Engineering (ICEEE)},
    faupublication = {yes},
    isbn = {9781509067886},
    keywords = {switching algebra,switching function,normal form,combinational circuit,resolution of terms,set theory,orthogonality},
    pages = {1--353},
    peerreviewed = {Yes},
    title = {Extended Forms of Switching Functions},
    type = {Konferenzschrift},
    venue = {Ankara, Turkey},
    }
  • M. Hierold, R. Weigel, and A. Koelpin, "Assessment of Transmitter Initiated Wake-Up Radio Versus Pure Wake-Up Receiver Decoding", IEEE Microwave and Wireless Components Letters, vol. 27, iss. 4, pp. 413-415, 2017. [DOI] [Bibtex]
    @article{hierold2017,
    abstract = {Energy efficient data transmission is a crucial task in wireless sensor networks. Wake-up radio (WuR) communication offers big potential here, rendering pure asynchronous communication possible. Two different approaches of WuR communication are presented here and a dedicated hardware implementation is proposed. By assessing the performance concerning energy efficiency for both approaches, their impact on the number of payload data bits and the number of nodes in communication range is revealed. A decision guidance is provided based on the parameters of a specific application scenario.},
    author = {Hierold, Martin and Weigel, Robert and Koelpin, Alexander},
    cris = {https://cris.fau.de/converis/publicweb/publication/108116624},
    year = {2017},
    month = {04},
    doi = {10.1109/LMWC.2017.2678446},
    faupublication = {yes},
    issn = {1531-1309},
    journaltitle = {IEEE Microwave and Wireless Components Letters},
    number = {4},
    pages = {413--415},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW WIREL CO},
    title = {Assessment of Transmitter Initiated Wake-Up Radio Versus Pure Wake-Up Receiver Decoding},
    volume = {27},
    }
  • S. Mueller and A. Koelpin, "Challenges on COTS-based Radiation Tolerant Communication System Design" in DLR Bauteilekonferenz, Jena, Germany, 2017. [Bibtex]
    @inproceedings{mueller2017,
    author = {Mueller, Steffen and Koelpin, Alexander},
    language = {German},
    booktitle = {DLR Bauteilekonferenz},
    cris = {https://cris.fau.de/converis/publicweb/publication/123424224},
    year = {2017},
    month = {04},
    day = {04},
    eventdate = {2017-04-04/2017-04-05},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Challenges on COTS-based Radiation Tolerant Communication System Design},
    type = {Konferenzschrift},
    venue = {Jena, Germany},
    }
  • T. Fersch, R. Weigel, and A. Koelpin, "Challenges in Miniaturized Automotive Long-Range Lidar System Design" in SPIE Defense + Commercial Sensing, Anaheim, CA, USA, 2017. [DOI] [Bibtex]
    @inproceedings{fersch2017a,
    author = {Fersch, Thomas and Weigel, Robert and Koelpin, Alexander},
    booktitle = {SPIE Defense + Commercial Sensing},
    cris = {https://cris.fau.de/converis/publicweb/publication/110559064},
    year = {2017},
    month = {04},
    day = {09},
    doi = {10.1117/12.2260894},
    eventdate = {2017-04-09/2017-04-13},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Challenges in Miniaturized Automotive Long-Range Lidar System Design},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • M. Frank, R. Weigel, and A. Koelpin, "Design of a 24 GHz Reconfigurable Transmitarray Element with Continuous Phase Range" in European Conference on Antennas and Propagation (EuCAP), Paris, France, 2017, pp. 2400-2404. [DOI] [Bibtex]
    @inproceedings{frank2017,
    abstract = {This paper presents a reconfigurable transmitarray antenna unit cell for a frequency of 24 GHz. A continuous phase range is obtained by loading patches with varactor diodes on the outer layers of a printed circuit board (PCB) while the signal couples through slots in the inner layers. The design, numerical and experimental characterization of the unit cell in a rectangular WR-42 waveguide are reported. A phase tuning range of 120° was achieved with a custom layer stack which could be extended to 145° using solely RF-substrates.},
    author = {Frank, Martin and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {European Conference on Antennas and Propagation (EuCAP)},
    cris = {https://cris.fau.de/converis/publicweb/publication/121165044},
    year = {2017},
    month = {03},
    day = {19},
    doi = {10.23919/EUCAP.2017.7928298},
    eventdate = {2017-03-16/2017-03-24},
    faupublication = {yes},
    pages = {2400--2404},
    peerreviewed = {Yes},
    title = {Design of a 24 GHz Reconfigurable Transmitarray Element with Continuous Phase Range},
    type = {Konferenzschrift},
    venue = {Paris, France},
    }
  • P. Gröschel, S. Zarei, C. Carlowitz, M. Lipka, E. Sippel, A. Ali, R. Weigel, R. Schober, and M. Vossiek, "A System Concept for Online Calibration of Massive MIMO Transceiver Arrays for Communication and Localization", IEEE Transactions on Microwave Theory and Techniques, 2017. [DOI] [Bibtex]
    @article{groeschel2017,
    abstract = {Massive multiple-input multiple-output (MIMO) techniques are being considered for the fifth generation (5G) mobile communication systems in order to deliver high multiplexing gain. However, hardware impairments like quadrature imbalance in mixers violate the requirement for channel reciprocity and may change, e.g., with temperature or while aging. In addition, advanced wireless localization techniques and the generation of predefined beam patterns require knowledge about all antenna phase center positions and the time and phase delay of all transmit and receive channels. Thus, an efficient online compensation method is needed that scales well for very large numbers of transceiver modules. We propose to extend the transmitter with a small measurement feature at the transmitter output based on one uncalibrated power detector per module as well as a single, external four-element backscatter array for the entire matrix. These enhancements facilitate a fast and efficient iterative calibration, which recognizes and mitigates all major error sources. Beside optimal communication throughput and energy efficiency, it thereby brings localization capabilities to mobile networks as an additional major benefit. For verification, a system of multiple cost-efficient 5.8-GHz massive MIMO transceivers with 150-MHz bandwidth and a backscatter array has been implemented. Measurement results demonstrate the capability of the proposed concept to efficiently compensate major error sources as well as its robustness.},
    author = {Gröschel, Patrick and Zarei, Shahram and Carlowitz, Christian and Lipka, Melanie and Sippel, Erik and Ali, Arslan and Weigel, Robert and Schober, Robert and Vossiek, Martin},
    cris = {https://cris.fau.de/converis/publicweb/publication/108243344},
    year = {2017},
    month = {03},
    day = {01},
    doi = {10.1109/TMTT.2017.2663404},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    keywords = {Backscatter transponder (BT),calibration,fifth generation (5G) mobile communication,massive multiple-input multiple-output (MIMO),wireless localization},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {A System Concept for Online Calibration of Massive MIMO Transceiver Arrays for Communication and Localization},
    type = {online publication},
    url = {http://ieeexplore.ieee.org/document/7867061/},
    }
  • S. Fuchs and R. Weigel, "Octal-site Testing of a State-of-the-art LTE RF-Transceiver IC" in Tagungsband TuZ 2017, Park Inn Hotel, Lübeck, 2017, pp. 29-32. [Bibtex]
    @inproceedings{fuchs2017,
    abstract = {More and more complex RF-transceiver ICs demand a broad test coverage to ensure highest outgoing quality. At the same time test costs need to be reduced due to low margins in the transceiver chip business. To make more efficient usage of expensive ATE (Automated Test Environment), higher parallelism is mandatory. Quad-site testing for RF-transceiver ICs is well established in the Semiconductor-Industry. Most ATE-vendors have optimized their machines for quad-site application. Due to higher usage of built-in self-test (BIST) functionality, higher parallelism seems feasible and reasonable in economic considerations. Nevertheless for higher multi-site testing the software as well as the hardware design constraints need to be considered carefully. This paper describes the extension for Octal-site testing and the respective signal integrity constraints.},
    author = {Fuchs, Stephan and Weigel, Robert},
    editor = {Mentor Graphics, Universität Bremen},
    language = {English},
    booktitle = {Tagungsband TuZ 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/108854064},
    year = {2017},
    month = {03},
    day = {05},
    eventdate = {2017-03-05/2017-03-07},
    eventtitle = {29th GI/GMM/ITG-Workshop Testmethoden und Zuverlässigkeit von Schaltungen und Systemen},
    faupublication = {yes},
    keywords = {Octal-site testing; LTE-transceiver; site-interference; signal integrity; multi-site efficiency},
    pages = {29--32},
    peerreviewed = {Yes},
    title = {Octal-site Testing of a State-of-the-art LTE RF-Transceiver IC},
    type = {Konferenzschrift},
    venue = {Park Inn Hotel, Lübeck},
    }
  • B. Gäde, M. A. Sedaghat, C. Rachinger, G. Fischer, and R. Müller, "A Novel Single-RF Outphasing MIMO Architecture" in WSA 2017; 21th International ITG Workshop on Smart Antennas; Proceedings of, Technische Universität Berlin, Germany, 2017, pp. 1-7. [Bibtex]
    @inproceedings{gaede2017,
    author = {Gäde, Bernhard and Sedaghat, Mohammad Ali and Rachinger, Christoph and Fischer, Georg and Müller, Ralf},
    language = {English},
    booktitle = {WSA 2017; 21th International ITG Workshop on Smart Antennas; Proceedings of},
    cris = {https://cris.fau.de/converis/publicweb/publication/200398030},
    year = {2017},
    month = {03},
    day = {15},
    eventdate = {2017-03-15/2017-03-17},
    eventtitle = {21st International ITG Workshop on Smart Antennas (WSA 2017)},
    faupublication = {yes},
    pages = {1--7},
    peerreviewed = {unknown},
    title = {A Novel Single-RF Outphasing MIMO Architecture},
    venue = {Technische Universität Berlin, Germany},
    }
  • F. Xie, R. Weiß, and R. Weigel, "Improved Mathematical Operations Based Calibration Method for Giant Magnetoresistive Current Sensor Applying B-Spline Modeling", Sensors and Actuators A-Physical, vol. 254, pp. 109-115, 2017. [DOI] [Bibtex]
    @article{xie2016a,
    abstract = {Nowadays, giant magnetoresistance (GMR) based sensor technology is widely used in numerous industrial applications. However, an inexpensive and efficient method for compensating the nonlinearity of GMR spin valve sensor is still under the industrial expectation, which limits the applications of the GMR sensors. By applying the B-Spline modeling, excellent results were achieved; nevertheless, a calibration with several hundreds of measured data points over dozens of temperatures had to be conducted. In this paper an improved mathematical operations based calibration method for GMR spin valve type current sensors applying B-Spline modeling is introduced. This method allows a calibration for each further sensor applying B-Spline modeling with only two temperatures and per temperature only five measurement points. In comparison with the original calibration effort for B-Spline modeling, the new calibration method with minimized efforts showed an outstanding measurement accuracy of ±0.6% at a nominal current of 50~A in a temperature range from -20~°C to 80~°C. Due to the unexpected linear temperature behavior of the magnetic parameters, mainly of the uniaxial anisotropy to the exchange direction anisotropy ratio (Ku/Ked), only 5 measurement points at two different temperatures were necessary for our new calibration method.},
    author = {Xie, Fei and Weiß, Roland and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/108112444},
    year = {2017},
    month = {02},
    day = {01},
    doi = {10.1016/J.SNA.2016.11.034},
    faupublication = {yes},
    issn = {0924-4247},
    journaltitle = {Sensors and Actuators A-Physical},
    keywords = {Giant magnetoresistive (GMR); Current sensor; Current measurement; Sensor calibration; B -Spline modeling},
    pages = {109--115},
    peerreviewed = {Yes},
    shortjournal = {SENSOR ACTUAT A-PHYS},
    title = {Improved Mathematical Operations Based Calibration Method for Giant Magnetoresistive Current Sensor Applying B-Spline Modeling},
    volume = {254},
    }
  • M. Maser, "Integrierter Generator zur Erzeugung hochlinearer und ultrabreitbandiger Frequenzrampen zur Nahbereichsortung", 2017. [Bibtex]
    @phdthesis{maser2017,
    author = {Maser, Matthias},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/108311984},
    year = {2017},
    month = {02},
    day = {01},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783961470181},
    peerreviewed = {automatic},
    title = {Integrierter Generator zur Erzeugung hochlinearer und ultrabreitbandiger Frequenzrampen zur Nahbereichsortung},
    type = {Dissertation},
    }
  • R. Weiss, R. Makuch, A. Itzke, and R. Weigel, "Crosstalk in Circular Arrays of Magnetic Sensors for Current Measurement", IEEE Transactions on Industrial Electronics, 2017. [DOI] [Bibtex]
    @article{itzke2016,
    author = {Weiss, Roland and Makuch, Rory and Itzke, Alexander and Weigel, Robert},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/108246644},
    year = {2017},
    month = {02},
    day = {24},
    doi = {10.1109/TIE.2017.2674630},
    faupublication = {yes},
    issn = {0278-0046},
    journaltitle = {IEEE Transactions on Industrial Electronics},
    peerreviewed = {Yes},
    shortjournal = {IEEE T IND ELECTRON},
    title = {Crosstalk in Circular Arrays of Magnetic Sensors for Current Measurement},
    }
  • E. Schwenzfeier-Hellkamp and D. Werner, "LED Basiswissen für Innen- und Außenraum" in 5. Fachaustausch der Stadt Werther, Werther, 2017. [Bibtex]
    @inproceedings{schwenzfeier-hellkamp2017,
    author = {Schwenzfeier-Hellkamp, Eva and Werner, Daniel},
    booktitle = {5. Fachaustausch der Stadt Werther},
    cris = {https://cris.fau.de/converis/publicweb/publication/203225334},
    year = {2017},
    month = {02},
    day = {15},
    eventdate = {2017-02-15/2018-02-15},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED Basiswissen für Innen- und Außenraum},
    type = {Konferenzschrift},
    venue = {Werther},
    }
  • J. Nehring, "Highly Integrated Microwave Vector Network Analysis Circuits and Systems for Instrumentation and Sensing Applications", 2017. [Bibtex]
    @phdthesis{nehring2017,
    author = {Nehring, Johannes},
    institution = {FAU Erlangen-Nürnberg},
    language = {English},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/108313084},
    year = {2017},
    month = {02},
    day = {21},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783961470105},
    peerreviewed = {automatic},
    title = {Highly Integrated Microwave Vector Network Analysis Circuits and Systems for Instrumentation and Sensing Applications},
    type = {Dissertation},
    }
  • S. Pinarello, "Adaptive Strategies for Enhancing the Efficiency of Radio Frequency Power Amplifiers in Back-Of Operation", 2017. [Bibtex]
    @phdthesis{pinarello2017,
    author = {Pinarello, Sandro},
    institution = {FAU Erlangen-Nürnberg},
    language = {English},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/124159244},
    year = {2017},
    month = {02},
    day = {15},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843929905},
    peerreviewed = {automatic},
    title = {Adaptive Strategies for Enhancing the Efficiency of Radio Frequency Power Amplifiers in Back-Of Operation},
    type = {Dissertation},
    }
  • M. A. Sedaghat, B. Gäde, R. Müller, and G. Fischer, "A Novel Hybrid Analog-Digital Transmitter for Multi-antenna Base Stations." 2017, pp. 1714-1718. [Bibtex]
    @inproceedings{sedaghat2017,
    abstract = {A new hybrid Analog-Digital (hybrid A-D) precoder is proposed for multi-antenna base stations in massive Multiple-Input Multiple-Output (MIMO) which allows a trade-off between the number of required RF-chains and the update rate of the analog part. It is shown that the number of RF-chains can be reduced even below the number of eigenmodes of the channel, thereby closing the gap between the standard hybrid A-D and the single-RF MIMO. This is achieved by dividing the input data streams into blocks and jointly optimizing the digital and the analog precoder parts for each block. The analog part of the precoder needs to be updated once per block and remains static over each block interval. Out of band radiation due to switching is resolved by inserting a short guard interval between blocks. It is shown the number of RF-chains can be any arbitrary positive integer to obtain zero distortion at the user terminals if the update rate is high enough. The proposed precoder offers a significant performance gain at the expenses of data dependent precoding and higher update rates of the analog part.},
    author = {Sedaghat, Mohammad Ali and Gäde, Bernhard and Müller, Ralf and Fischer, Georg},
    cris = {https://cris.fau.de/converis/publicweb/publication/200397152},
    year = {2017},
    month = {01},
    day = {01},
    faupublication = {yes},
    issn = {2076-1465},
    journaltitle = {2012 PROCEEDINGS OF THE 20TH EUROPEAN SIGNAL PROCESSING CONFERENCE (EUSIPCO)},
    pages = {1714--1718},
    peerreviewed = {unknown},
    title = {A Novel Hybrid Analog-Digital Transmitter for Multi-antenna Base Stations},
    }
  • F. Lurz, S. Lindner, S. Linz, S. Mann, R. Weigel, and A. Koelpin, "High-Speed Resonant Surface Acoustic Wave Instrumentation Based on Instantaneous Frequency Measurement", IEEE Transactions on Instrumentation and Measurement, vol. 66, iss. 5, pp. 974-984, 2017. [DOI] [Bibtex]
    @article{lurz2017,
    abstract = {Surface acoustic wave (SAW) resonators are used for a broad range of wireless sensing applications, some of them having high demands on the resolution as well as the measurement update rate. This paper presents a new interrogation method for precise and fast frequency determination of passive SAW resonators based on instantaneous frequency measurement (IFM) by a low-cost Six-Port interferometer. By using a delay line, the frequency measurement is reduced to a phase measurement that can be instantaneously evaluated by the Six-Port network. No complex signal processing is necessary providing high update rates and low hardware costs. An in-depth analysis of the system concept and its building blocks is presented and the advantages as well as the limitations are discussed and compared to the current state-of-the-art. Finally, a demonstrator in the 2.4 GHz frequency band shows the feasibility and the precision of the concept with measurement times of only a few microseconds.},
    author = {Lurz, Fabian and Lindner, Stefan and Linz, Sarah and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/122913384},
    year = {2017},
    month = {01},
    day = {19},
    doi = {10.1109/TIM.2016.2642618},
    faupublication = {yes},
    issn = {0018-9456},
    journaltitle = {IEEE Transactions on Instrumentation and Measurement},
    number = {5},
    pages = {974--984},
    peerreviewed = {Yes},
    shortjournal = {IEEE T INSTRUM MEAS},
    title = {High-Speed Resonant Surface Acoustic Wave Instrumentation Based on Instantaneous Frequency Measurement},
    volume = {66},
    }
  • S. Linz, C. Will, F. Lurz, S. Lindner, S. Mann, R. Schober, R. Weigel, and A. Koelpin, "Detector Nonlinearity in Six-Port Radar" in IEEE Topical Conference on Wireless Sensors and Sensor Networks, Phoenix, AZ, USA, 2017, pp. 19-22. [DOI] [Bibtex]
    @inproceedings{linz2017,
    abstract = {This paper presents an in-situ detector characterization and calibration method for differential I/Q Sixport radar systems. A separate calibration of the nonlinear detectors and the linear Six-port front-end enables an independent analysis of errors caused by detector nonlinearity and by the measurement scenario. A linearity analysis of various detectors in Six-port radar systems shows the necessity of a detector calibration for accurate displacement measurements. The calibration is evaluated with three different Six-port front-ends at 24 GHz in divers measurement scenarios. An error reduction of up to 50% has been achieved.},
    author = {Linz, Sarah and Will, Christoph and Lurz, Fabian and Lindner, Stefan and Mann, Sebastian and Schober, Robert and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/120065044},
    year = {2017},
    month = {01},
    day = {15},
    doi = {10.1109/WISNET.2017.7878745},
    eventdate = {2017-01-15/2017-01-18},
    faupublication = {yes},
    pages = {19--22},
    peerreviewed = {Yes},
    title = {Detector Nonlinearity in Six-Port Radar},
    type = {Konferenzschrift},
    venue = {Phoenix, AZ, USA},
    }
  • S. N. Easwaran, S. Chellamuthu, S. K. Venugopal, and R. Weigel, "Voltage and Current Selector Based Biasing Topology for Multiple Supply Voltage Circuits", IEEE Transactions on Circuits and Systems Ii-Express Briefs, 2017. [DOI] [Bibtex]
    @article{easwaran2017,
    abstract = {In Systems on Chip (SOC) there are Multiple Supply Voltage designs where a module is powered by several supply rails. For example these rails are at 40V, 5V and 3.3V. A safe biasing scheme is needed to ensure no tri-stated biasing conditions can exist, which can result in unintended activation of the power stages or output drivers leading to high currents. It is shown here a safe biasing scheme can be implemented under any power sequencing scheme in Multiple Supply Voltage designs by exploiting the voltage and current selector topologies. This circuit was implemented in a 40V, 0.35µm, BiCMOS process on a 4 channel airbag squib driver IC. The fabricated circuit’s quiescent current is less than 5mA even if the on chip junction temperature is 175°C and for various fault conditions that can occur in a multiple power supply domain.},
    author = {Easwaran, Sri Navaneethakrishnan and Chellamuthu, Shanmuganad and Venugopal, Sunil Kashyap and Weigel, Robert},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/108142144},
    year = {2017},
    month = {01},
    day = {27},
    doi = {10.1109/TCSII.2017.2660525},
    faupublication = {yes},
    issn = {1549-7747},
    journaltitle = {IEEE Transactions on Circuits and Systems Ii-Express Briefs},
    keywords = {Rails; Logic gates; System-on-chip; Photonic band gap; Generators; State of charge; Digital audio players},
    peerreviewed = {Yes},
    shortjournal = {IEEE T CIRCUITS-II},
    title = {Voltage and Current Selector Based Biasing Topology for Multiple Supply Voltage Circuits},
    }
  • M. Kloc, R. Weigel, and A. Koelpin, "SDR Implementation of an Adaptive Low-Latency IEEE 802.11p Transmitter System for Real-Time Wireless Applications" in IEEE Radio and Wireless Symposium (RWS), 2017, pp. 207-210. [DOI] [Bibtex]
    @inproceedings{kloc2017,
    author = {Kloc, Matej and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108239384},
    year = {2017},
    month = {01},
    doi = {10.1109/RWS.2017.7885989},
    eventtitle = {IEEE Radio and Wireless Symposium (RWS)},
    faupublication = {yes},
    pages = {207--210},
    peerreviewed = {No},
    title = {SDR Implementation of an Adaptive Low-Latency IEEE 802.11p Transmitter System for Real-Time Wireless Applications},
    }
  • C. Will, S. Linz, S. Mann, F. Lurz, S. Lindner, R. Weigel, and A. Koelpin, "Segmental Polynomial Approximation based Phase Error Correction for Precise Near Field Displacement Measurements using Six-Port Microwave Interferometers" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Phoenix, AZ, USA, 2017. [DOI] [Bibtex]
    @inproceedings{will2017,
    abstract = {Six-Port microwave interferometers are a lowcost as well as low-power type of radar sensor with a high phase accuracy, which can be used for precise displacement measurements. Near field effects strongly influence the signal characteristics of a reflection of the electromagnetic wave near the antenna, especially if the target is low reflective. In this paper a calibration procedure based on phase error correction by segmental polynomial approximation is proposed that utilizes these effects. After validating the functionality of the calibration algorithm and its improvement by comparison to a comparable state-of-the-art procedure, two further near field measurements are presented. A cardboard as well as a plastic plate are used as low reflecting targets to show the applicability of the proposed calibration procedure for diverse measurement scenarios.},
    author = {Will, Christoph and Linz, Sarah and Mann, Sebastian and Lurz, Fabian and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108238504},
    year = {2017},
    month = {01},
    day = {15},
    doi = {10.1109/WISNET.2017.7878746},
    eventdate = {2017-01-15/2017-01-18},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Segmental Polynomial Approximation based Phase Error Correction for Precise Near Field Displacement Measurements using Six-Port Microwave Interferometers},
    type = {Konferenzschrift},
    venue = {Phoenix, AZ, USA},
    }
  • J. Nehring, M. Schütz, M. Dietz, I. Nasr, K. Aufinger, R. Weigel, and D. Kissinger, "Highly Integrated 4–32-GHz Two-Port Vector Network Analyzers for Instrumentation and Biomedical Applications", IEEE Transactions on Microwave Theory and Techniques, vol. 65, iss. 1, pp. 229-244, 2017. [DOI] [Bibtex]
    @article{nehring2017a,
    abstract = {This paper addresses the miniaturization of microwave vector network analyzers (VNAs) and the future vision of the VNA on a chip. Therefore, a highly integrated two-port VNA with a multioctave bandwidth from 4 to 32 GHz is presented. The proposed system is based on a fully integrated radio-frequency frontend consisting of a two-port stimulus, a four-channel heterodyne receiver, and a wideband testset. The testset is comprised of on-chip multisection directional couplers. The chip is operated inside a hardware demonstrator using a 16-term calibration procedure. The measurement of arbitrary devices under test is in excellent agreement with commercial measurement equipment and showed a mean deviation from the reference measurement of 0.17 dB and 1.29° regarding the forward transmission of a coaxial 30-dB attenuator. The system and receiver dynamic ranges are 44-77 and 82-101 dB at a resolution bandwidth of 100 kHz over the full system bandwidth. The measurements are highly repeatable and are robust against drift over time. As a proof of concept, the developed integrated network analyzers are utilized in a biomedical sensing scenario with an external and an on-chip sensor. Both approaches showed good sensitivity regarding the mixture ratio of binary solutions of ethanol and methanol.},
    author = {Nehring, Johannes and Schütz, Martin and Dietz, Marco and Nasr, Ismail and Aufinger, Klaus and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    publisher = {Institute of Electrical and Electronics Engineers (IEEE)},
    cris = {https://cris.fau.de/converis/publicweb/publication/209747112},
    year = {2017},
    month = {01},
    doi = {10.1109/TMTT.2016.2616873},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {1},
    pages = {229--244},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Highly Integrated 4–32-GHz Two-Port Vector Network Analyzers for Instrumentation and Biomedical Applications},
    type = {Review article},
    volume = {65},
    }
  • F. Pflaum, S. Erhardt, R. Weigel, and A. Koelpin, "RSSI-based Localization With Minimal Infrastructure Using Multivariate Statistic Techniques" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Phoenix, AZ, USA, 2017, pp. 69-72. [DOI] [Bibtex]
    @inproceedings{pflaum2017,
    abstract = {In this paper a new approach to localization of mobile nodes in wireless sensor networks is presented which utilizes the measurement of the received signal strength indicator by multiple receivers concentrated in a small area and applies the technique of linear discriminant analysis to the received data. The concept of gathering all receivers at a single spot provides great flexibility, while good spatial resolution is still achieved. This is demonstrated by a test network operating in the sub-GHz-range around 868 MHz.},
    author = {Pflaum, Felix and Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/107088344},
    year = {2017},
    month = {01},
    day = {15},
    doi = {10.1109/WISNET.2017.7878758},
    eventdate = {2017-01-15/2017-01-18},
    faupublication = {yes},
    keywords = {wireless; wsn; lda; statistics; localization},
    pages = {69--72},
    peerreviewed = {Yes},
    title = {RSSI-based Localization With Minimal Infrastructure Using Multivariate Statistic Techniques},
    venue = {Phoenix, AZ, USA},
    }
  • D. Werner, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "Intelligente LED-Leuchte für die Funktionsbereiche „Fressen, „Liegen“ und „Laufen“ in der Milchviehhaltung" in 4. Düsser Milchviehforum, Versuchs- und Bildungszentrum Landwirtschaft Haus Düsse, Bad Sassendorf, 2017. [Bibtex]
    @inproceedings{werner2017,
    author = {Werner, Daniel and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {4. Düsser Milchviehforum},
    cris = {https://cris.fau.de/converis/publicweb/publication/203225673},
    year = {2017},
    month = {01},
    day = {26},
    eventdate = {2017-01-26/2017-01-26},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Intelligente LED-Leuchte für die Funktionsbereiche „Fressen, „Liegen“ und „Laufen“ in der Milchviehhaltung},
    type = {Konferenzschrift},
    venue = {Versuchs- und Bildungszentrum Landwirtschaft Haus Düsse, Bad Sassendorf},
    }
  • C. Schmidt, J. Nehring, M. Dietz, R. Weigel, D. Kissinger, and A. Hagelauer, "A 10 Gb/s Highly-Integrated Adaptive Pseudo-Noise Transmitter for Biomedical Applications" in IEEE Radio and Wireless Symposium, Phoenix, 2017, pp. 101-103. [DOI] [Bibtex]
    @inproceedings{schmidt2017,
    abstract = {A highly-integrated (2\^{}11)-1 pseudo-random bit sequence (PRBS) transmitter for biomedical applications is presented. The chip consists of an ultra-wideband synthesizer with an integrated divider to drive a PLL, a linear feedback shift register (LFSR) to generate an M-sequence and a programmable binary divider to enable adaptive subsampling technique in the signal processing path. The circuit is created to be used in a miniaturized portable PRBS based sensor system for biomedical applications. A conceivable application is the measurement of dehydration in a human body. The PRBS generator is capable of generating a bit-rate up to 10 Gb/s, correlating to a maximum bandwidth of the generated sequence of 5 GHz, which is sufficient for the designated applications. The circuit is manufactured in an 0.35 um SiGe-Bipolar technology with an ft of 200 GHz using 12 mm\^{}2 chip area.},
    author = {Schmidt, Christian and Nehring, Johannes and Dietz, Marco and Weigel, Robert and Kissinger, Dietmar and Hagelauer, Amelie},
    booktitle = {IEEE Radio and Wireless Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/108240044},
    year = {2017},
    month = {01},
    doi = {10.1109/RWS.2017.7885957},
    faupublication = {yes},
    pages = {101--103},
    peerreviewed = {Yes},
    title = {A 10 Gb/s Highly-Integrated Adaptive Pseudo-Noise Transmitter for Biomedical Applications},
    venue = {Phoenix},
    }
  • M. Kamper and G. Fischer, "Optimized output baluns for wideband differential class D PAs" in 2017 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, PAWR 2017, 2017, pp. 84-87. [DOI] [Bibtex]
    @inproceedings{kamper2017,
    author = {Kamper, Michael and Fischer, Georg},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {2017 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, PAWR 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/202293202},
    year = {2017},
    doi = {10.1109/PAWR.2017.7875580},
    faupublication = {yes},
    isbn = {9781509034574},
    journaltitle = {Proceedings of the 2017 IEEE Topical Conference on Power Amplifiers for Wireless and Radio Applications, PAWR 2017},
    pages = {84--87},
    peerreviewed = {unknown},
    title = {Optimized output baluns for wideband differential class D PAs},
    type = {Report},
    }
  • J. Kohl, W. Bauer, J. Bäsig, and D. Fey, "Evaluating a Simulation based PLC Processor Optimization" in ISC 2017, Warsaw, Poland, 2017, pp. 61-66. [Bibtex]
    @inproceedings{kohl2017,
    author = {Kohl, Johannes and Bauer, Wolfgang and Bäsig, Jürgen and Fey, Dietmar},
    booktitle = {ISC 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/111195744},
    year = {2017},
    eventtitle = {15th Annual Industrial Simulation Conference},
    faupublication = {yes},
    pages = {61--66},
    peerreviewed = {Yes},
    title = {Evaluating a Simulation based PLC Processor Optimization},
    type = {Konferenzschrift},
    venue = {Warsaw, Poland},
    volume = {15},
    }
  • M. Schütz, M. Oesterlein, C. Birkenhauer, and M. Vossiek, "A custom lightweight UAV for radar remote sensing: Concept design, properties and possible applications" in 2017 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM 2017), 2017. [DOI] [Bibtex]
    @inproceedings{schuetz2017,
    abstract = {In this paper, we introduce a novel, tailor-made UAV-based sensor platform for radar remote sensing. It is controlled by a redundantly implemented, customized flight control and equipped with a comprehensive embedded system for radar baseband processing. Both systems are synchronized with a common, low-phase noise and temperature-stable reference clock, which allows coherent acquisition and continuous recording of sensor data. A commercial differential GPS system is used for positioning. The platform potentially allows interferometric remote sensing with synthetic apertures. In a first case study, it is equipped with a bistatic 24GHz MIMO radar system to create a side-looking-airborne-radar, allowing full interferometric SAR processing. As a proof-of-concept, a radar altimeter measurement is presented, which replaces and outperforms common altitude estimators, such as barometric or ultra sonic sensors.},
    author = {Schütz, Martin and Oesterlein, Martin and Birkenhauer, Christoph and Vossiek, Martin},
    language = {English},
    booktitle = {2017 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM 2017)},
    cris = {https://cris.fau.de/converis/publicweb/publication/121993784},
    year = {2017},
    doi = {10.1109/ICMIM.2017.7918868},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {A custom lightweight UAV for radar remote sensing: Concept design, properties and possible applications},
    }
  • J. Kohl, W. Bauer, J. Bäsig, S. Rübesam, and D. Fey, "Processor Error Detection Capabilities of Random Programs" in Tagungsband TuZ 2017, Lübeck, Germany, 2017, pp. 65-68. [Bibtex]
    @inproceedings{kohl2017a,
    author = {Kohl, Johannes and Bauer, Wolfgang and Bäsig, Jürgen and Rübesam, Stefan and Fey, Dietmar},
    booktitle = {Tagungsband TuZ 2017},
    cris = {https://cris.fau.de/converis/publicweb/publication/111364484},
    year = {2017},
    eventtitle = {Testmethoden und Zuverlässigkeit von Schaltungen und Systemen},
    faupublication = {yes},
    pages = {65--68},
    peerreviewed = {Yes},
    title = {Processor Error Detection Capabilities of Random Programs},
    type = {Konferenzschrift},
    venue = {Lübeck, Germany},
    volume = {29},
    }
  • D. Wust, C. Söll, and D. Fey, "A fast general purpose CPU utilizing signed-digit encoding and multi-bit memristors" in HiPEAC Workshop on Memristor Technology, Design, Automation and Computing, 2017. [Bibtex]
    @inproceedings{wust2017,
    abstract = {-},
    author = {Wust, Daniel and Söll, Christopher and Fey, Dietmar},
    booktitle = {HiPEAC Workshop on Memristor Technology, Design, Automation and Computing},
    cris = {https://cris.fau.de/converis/publicweb/publication/122912724},
    year = {2017},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {A fast general purpose CPU utilizing signed-digit encoding and multi-bit memristors},
    }
  • T. Meister, F. Ellinger, J. W. Bartha, M. Berroth, J. Burghartz, M. Claus, L. Frey, A. Gagliardi, M. Grundmann, J. Hesselbarth, H. Klauk, K. Leo, P. Lugli, S. Mannsfeld, Y. Manoli, R. Negra, D. Neumaier, U. Pfeiffer, T. Riedl, S. Scheinert, U. Scherf, A. Thiede, G. Tröster, M. Vossiek, R. Weigel, C. Wenger, G. Alavi, M. Becherer, C. A. Chavarin, M. Darwish, M. Ellinger, C. Y. Fan, M. Fritsch, F. Grotjahn, M. Gunia, K. Haase, P. Hillger, K. Ishida, M. Jank, S. Knobelspies, M. Kuhl, G. Lupina, S. M. Naghadeh, N. Münzenrieder, S. Özbek, M. Rasteh, G. A. Salvatore, D. Schrüfer, C. Strobel, M. Theisen, C. Tuckmantel, H. Von Wenckstern, Z. Wang, and Z. Zhang, "Program FFlexCom - High frequency flexible bendable electronics for wireless communication systems" in 2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS), 2017, pp. 1-6. [DOI] [Bibtex]
    @inproceedings{meister2017,
    author = {Meister, Tilo and Ellinger, Frank and Bartha, Johann W. and Berroth, Manfred and Burghartz, Joachim and Claus, Martin and Frey, Lothar and Gagliardi, Alessio and Grundmann, Marius and Hesselbarth, Jan and Klauk, Hagen and Leo, Karl and Lugli, Paolo and Mannsfeld, Stefan and Manoli, Yiannos and Negra, Renato and Neumaier, Daniel and Pfeiffer, Ullrich and Riedl, Thomas and Scheinert, Susanne and Scherf, Ullrich and Thiede, Andreas and Tröster, Gerhard and Vossiek, Martin and Weigel, Robert and Wenger, Christian and Alavi, Golzar and Becherer, Markus and Chavarin, Carlos Alvarado and Darwish, Mohammed and Ellinger, Martin and Fan, Chun Yu and Fritsch, Martin and Grotjahn, Frank and Gunia, Marco and Haase, Katherina and Hillger, Philipp and Ishida, Koichi and Jank, Michael and Knobelspies, Stefan and Kuhl, Matthias and Lupina, Grzegorz and Naghadeh, Shabnam Mohammadi and Münzenrieder, Niko and Özbek, Sefa and Rasteh, Mahsa and Salvatore, Giovanni A. and Schrüfer, Daniel and Strobel, Carsten and Theisen, Manuel and Tuckmantel, Christian and Von Wenckstern, Holger and Wang, Zhenxing and Zhang, Zhipeng},
    booktitle = {2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/200162764},
    year = {2017},
    doi = {10.1109/COMCAS.2017.8244733},
    faupublication = {no},
    keywords = {flexible electronics;radiocommunication;DFG Priority Program FFlexCom;flexible bendable electronics;wireless communication systems;Integrated circuit modeling;Metals;Microwave antennas;Substrates;Thin film transistors;Wireless communication},
    pages = {1--6},
    peerreviewed = {unknown},
    title = {Program FFlexCom - High frequency flexible bendable electronics for wireless communication systems},
    }
  • G. A. Guarin Aristizabal, "Design of Ultra-Wideband Systems for ISM Applications", 2017. [Bibtex]
    @phdthesis{guarin2017,
    author = {Guarin Aristizabal, Gustavo Adolfo},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/110150304},
    year = {2017},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Design of Ultra-Wideband Systems for ISM Applications},
    type = {Dissertation},
    }
  • L. Zimmermann, A. Götz, G. Fischer, and R. Weigel, "Performance Analysis of Time Difference of Arrival and Angle of Arrival Estimation Methods for GSM Mobile Phone Localization," in Communication, Signal Processing & Information Technology, De Gruyter, 2017, vol. 4, pp. 17-34. [DOI] [Bibtex]
    @inbook{zimmermann2017,
    abstract = {The localization methods time difference of arrival (TDOA) and angle of arrival (AOA) are investigated in their capability of high-resolution detection of GSM signals. Because GSM is of narrowband nature, a bandwidth expansion technique that significantly increases the resolution of TDOA is introduced. The algorithms maximum likelihood estimator (for TDOA), root multiple signal classification and estimation of signal parameters via rotational invariance techniques (for AOA) are proposed as a reference for each method. Simulations conducted with noisy signals and multipath propagation demonstrate the potential of TDOA for GSM localization, especially for search and rescue applications. AOA on the other hand is very sensitive to multipath, and is therefore only recommended for open space scenarios.},
    author = {Zimmermann, Lars and Götz, Alexander and Fischer, Georg and Weigel, Robert},
    language = {English},
    publisher = {De Gruyter},
    booktitle = {Communication, Signal Processing & Information Technology},
    cris = {https://cris.fau.de/converis/publicweb/publication/118713144},
    year = {2017},
    doi = {10.1515/9783110448399-002},
    faupublication = {yes},
    isbn = {9783110448399},
    issn = {2365-7493},
    journaltitle = {Advances in systems, signals and devices},
    keywords = {Time difference of arrival estimation; Direction of arrival estimation; GSM; Maximum likelihood estimation; Multiple signal classification; Estimation of signal parameters via rotational invariance techniques},
    pages = {17--34},
    peerreviewed = {unknown},
    series = {Advances in Systems, Signals and Devices},
    title = {Performance Analysis of Time Difference of Arrival and Angle of Arrival Estimation Methods for GSM Mobile Phone Localization},
    type = {Buchkapitel},
    volume = {4},
    }
  • C. Söll, J. Röber, H. Milosiu, R. Weigel, and A. Hagelauer, "Area-Efficient Fully Integrated Dual-Band Class-E/F Power Amplifier with Switchable Output Power for a BPSK/OOK Transmitter" in IEEE International Symposium on Circuits and Systems, Baltimore, USA, 2017, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{soell2017a,
    abstract = {This paper presents a novel area-efficient dual-band class-E/F power amplifier (PA) with switchable output power. It is targeted to work in a BPSK/OOK transmitter in smart facility applications like an autarkic asset-tracking system based on small sensor nodes. The amplifier is able to operate at both 434MHz and 868MHz without the need for additional inductors. The output power settings at 868MHz are controllable between -1.79dBm and -24.61dBm at 4.96mA and 1.43mA current consumption, respectively. The whole circuit including all inductors and the matching network in front of the antenna consumes only 0.9mm2 chip area and is fully integrated in a 180nm CMOS process together with a VCO and a PLL.},
    author = {Söll, Christopher and Röber, Jürgen and Milosiu, Heinrich and Weigel, Robert and Hagelauer, Amelie},
    booktitle = {IEEE International Symposium on Circuits and Systems},
    cris = {https://cris.fau.de/converis/publicweb/publication/108242684},
    year = {2017},
    doi = {10.1109/ISCAS.2017.8050676},
    faupublication = {yes},
    keywords = {Class-E/F Power Amplifier; Dual-Band; Switchable Output Power; Asset-Tracking System},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Area-Efficient Fully Integrated Dual-Band Class-E/F Power Amplifier with Switchable Output Power for a BPSK/OOK Transmitter},
    type = {Konferenzschrift},
    venue = {Baltimore, USA},
    }

2016

  • F. X. Röhrl, W. Bogner, J. Jakob, D. Hageneder, and S. Zorn, "Differential wideband interconnects for organic millimeter wave chip packages - An effort to design an all-purpose RF chip package" , London, UK, 2016. [DOI] [Bibtex]
    @inproceedings{roehrl2016,
    abstract = {In this paper a chip package is presented that is optimized for high operation frequencies and high power applications with a moderate number of signal paths. Using standard printed circuit board (PCB) materials, the package is also very cost effective. For radio frequency (RF) applications, the connection between chip and package is as important as the connection between package and baseboard. This paper presents both and shows that the package-baseboard transition is dominating the insertion and return loss at frequencies above 40 GHz, when using organic PCBs as base for the packages. Moreover, some methods are introduced to simplify the simulation models of organic PCB transitions. Because of the fully impedance controlled design process, the presented transitions can be used from DC to 67 GHz and ensure best signal integrity.},
    author = {Röhrl, Franz Xaver and Bogner, Werner and Jakob, Johannes and Hageneder, Daniel and Zorn, Stefan},
    language = {English},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/108869464},
    year = {2016},
    month = {12},
    day = {08},
    doi = {10.1109/EUMC.2016.7824631},
    eventdate = {2016-10-04/2016-10-06},
    faupublication = {no},
    keywords = {signal integrity,differential wideband interconnection,organic millimeter wave chip packaging,standard printed circuit board material,radiofrequency application,package-baseboard transition,insertion loss,return loss,organic PCB material transition,impedance controlled design process},
    peerreviewed = {Yes},
    title = {Differential wideband interconnects for organic millimeter wave chip packages - An effort to design an all-purpose RF chip package},
    url = {http://ieeexplore.ieee.org/document/7824631/},
    venue = {London, UK},
    }
  • V. Chauhan, M. Mayer, C. Huck, M. Pitschi, R. Weigel, and A. Hagelauer, "Nonlinear behavior of RF Bulk Acoustic Wave cascaded components at high input power" in IEEE Asia-Pacific Microwave Conference (APMC), New Delhi, India, India, 2016, p. 4. [DOI] [Bibtex]
    @inproceedings{chauhan2016a,
    abstract = {At high frequency, Bulk Acoustic Wave (BAW) devices are mainly used for filtering in front-ends of modern mobile transceivers. Furthermore, the transmitter filters are usually used at high input power levels of up to 33 dBm, which lead to nonlinearity and self-heating within the filter. In this work a thermo-electro-mechanical Mason model combined with a 3-dimensional electromagnetic finite element method (3D EM FEM) is used for modeling the nonlinear behavior of different BAW components. The impedance curve, filter response, second harmonics as well as inter-modulation distortion (IMD) of cascaded BAW resonators and filters due to the nonlinearities are explained. With the aid of the developed method, different cascading approaches for optimizing the nonlinear behavior are shown. Measurements of BAW components up to second order harmonics have been carried out using a nonlinear vector network analyzer (NVNA).},
    author = {Chauhan, Vikrant and Mayer, Markus and Huck, Christian and Pitschi, Maximilian and Weigel, Robert and Hagelauer, Amelie},
    language = {English},
    booktitle = {IEEE Asia-Pacific Microwave Conference (APMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109703484},
    year = {2016},
    month = {12},
    day = {05},
    doi = {10.1109/APMC.2016.7931351},
    eventdate = {2016-12-05/2016-12-09},
    eventtitle = {2016 Asia-Pacific Microwave Conference (APMC)},
    faupublication = {yes},
    issn = {2165-4743},
    keywords = {Resonators;Harmonic analysis;Power harmonic filters;Power measurement;Frequency measurement;Area measurement;Bulk acoustic wave devices},
    pages = {4},
    peerreviewed = {Yes},
    title = {Nonlinear behavior of RF Bulk Acoustic Wave cascaded components at high input power},
    type = {Konferenzschrift},
    venue = {New Delhi, India, India},
    }
  • A. Talai, G. Gold, M. Frank, S. Mann, R. Weigel, and A. Koelpin, "A Coplanar Waveguide Resonator Based In-Line Material Characterization Sensor for Bulk and Metallized Dielectrics", Frequenz, vol. 71, iss. 3-4, 2016. [DOI] [Bibtex]
    @article{talai2016a,
    abstract = {Microwave Materials such as Rogers RO3003 are subject to process-related fluctuations in terms of the relative permittivity and dielectric loss. The behavior of high frequency circuits like patch-antenna arrays and their distribution networks is dependent on the effective wavelength. Therefore, fluctuations of the complex permittivity will influence the resonance frequency and beam direction of the antennas. This paper presents a grounded coplanar waveguide based sensor, which can measure the complex permittivity at 77 GHz, as well as at other resonance frequencies, by applying it on top of the manufactured depaneling. The relative permittivity of the material under test (MUT) is a function of the resonance frequency shift and the dielectric loss of the MUT can be determined by transmission amplitude variations at the resonances. In addition, the sensor is robust against floating ground metallizations on inner printed circuit board layers, which are typically distributed over the entire surface below antennas. Furthermore, the impact from conductor surface roughness on the measured permittivity values is determined using the Gradient Model.},
    author = {Talai, Armin and Gold, Gerald and Frank, Martin and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {Walter de Gruyter GmbH},
    cris = {https://cris.fau.de/converis/publicweb/publication/107169084},
    year = {2016},
    month = {12},
    day = {07},
    doi = {10.1515/FREQ-2016-0201},
    faupublication = {yes},
    issn = {0016-1136},
    journaltitle = {Frequenz},
    number = {3-4},
    peerreviewed = {Yes},
    shortjournal = {FREQUENZ},
    title = {A Coplanar Waveguide Resonator Based In-Line Material Characterization Sensor for Bulk and Metallized Dielectrics},
    volume = {71},
    }
  • T. Lieske, D. Schuklin, D. Hohnloser, M. Reichenbach, B. Pfundt, D. Fey, and R. Weigel, "Smart Sensor Framework: A Pressure Sensor for Smart Home Applications" in 1. E|HOME-CENTER SYMPOSIUM, Nürnberg, Germany, 2016. [Bibtex]
    @inproceedings{lieske2016,
    author = {Lieske, Tobias and Schuklin, Dennis and Hohnloser, Daniel and Reichenbach, Marc and Pfundt, Benjamin and Fey, Dietmar and Weigel, Robert},
    language = {English},
    booktitle = {1. E|HOME-CENTER SYMPOSIUM},
    cris = {https://cris.fau.de/converis/publicweb/publication/108935244},
    year = {2016},
    month = {12},
    day = {30},
    eventdate = {2016-11-30/2016-12-01},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Smart Sensor Framework: A Pressure Sensor for Smart Home Applications},
    type = {Konferenzschrift},
    venue = {Nürnberg, Germany},
    }
  • T. Girg, D. Schrüfer, M. Dietz, A. Hagelauer, D. Kissinger, and R. Weigel, "Low Complexity 60-GHz Receiver Architecture for Simultaneous Phase and Amplitude Regenerative Sampling Systems" in International Symposium on Integrated Circuits, Singapur, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{girg2016a,
    abstract = {With increasing data rates in communication systems, the call for wideband transceiver solutions capable of processing complex modulation schemes is getting stronger. Unfortunately, this goes along with power hungry systems and more complex integrated circuits. A novel receiver architecture, which addresses these issues, is based on the simultaneous phase and amplitude regenerative sampling system. Its system exploits switched injection-locked oscillators and their capability to regenerate signals with a gain of over 40dB. This paper demonstrates an integrated solution for phase demodulation in such an architecture. The proposed concept uses the low complex but efficient self-mixing principle and consists mainly of double-balanced Gilbert mixers, amplifiers, a delay line and passive power dividers. The detection of the phase is achieved through self-mixing the regenerated signal with one path delayed by a symbol period. The architecture achieves 2 GBaud/s with 8 th order differential phase shift keying at a frequency of 60 GHz and is realized in a 130nm SiGe BiCMOS technology.},
    author = {Girg, Thomas and Schrüfer, Daniel and Dietz, Marco and Hagelauer, Amelie and Kissinger, Dietmar and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {International Symposium on Integrated Circuits},
    cris = {https://cris.fau.de/converis/publicweb/publication/108101884},
    year = {2016},
    month = {12},
    day = {12},
    doi = {10.1109/ISICIR.2016.7829729},
    eventdate = {2016-12-12/2016-12-14},
    eventtitle = {The 15th International Symposium on Integrated Circuits},
    faupublication = {yes},
    keywords = {SiGe; BiCMOS; simultaneous phase and amplitude regenrative sampling; high data rate; communication; self-mixing},
    pages = {1--4},
    peerreviewed = {No},
    title = {Low Complexity 60-GHz Receiver Architecture for Simultaneous Phase and Amplitude Regenerative Sampling Systems},
    type = {Konferenzschrift},
    url = {http://ieeexplore.ieee.org/document/7829729/},
    venue = {Singapur},
    }
  • J. Fuhrmann, "A Digital Power Amplifier in 28 nm CMOS for LTE Applications", 2016. [Bibtex]
    @phdthesis{fuhrmann2016,
    author = {Fuhrmann, Jörg},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/121585464},
    year = {2016},
    month = {12},
    day = {19},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783944057958},
    peerreviewed = {automatic},
    title = {A Digital Power Amplifier in 28 nm CMOS for LTE Applications},
    type = {Dissertation},
    }
  • M. Trautmann, B. Sanftl, R. Weigel, and A. Koelpin, "Frequency Separation Stage Design for a Reliable Data Link in an IPT System for Electric Vehicles" in IEEE Southern Power Electronics Conference (SPEC), Auckland, New Zealand, 2016. [DOI] [Bibtex]
    @inproceedings{trautmann2016b,
    author = {Trautmann, Martin and Sanftl, Benedikt and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE PES},
    booktitle = {IEEE Southern Power Electronics Conference (SPEC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108129604},
    year = {2016},
    month = {12},
    day = {05},
    doi = {10.1109/SPEC.2016.7846000},
    eventdate = {2016-12-05/2016-12-08},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Frequency Separation Stage Design for a Reliable Data Link in an IPT System for Electric Vehicles},
    type = {Konferenzschrift},
    venue = {Auckland, New Zealand},
    volume = {2},
    }
  • A. Radwan, "Broadband Low Power Transmitter Based in SiGe Technology on Maximum Length Sequences", 2016. [Bibtex]
    @phdthesis{radwan2016,
    author = {Radwan, Ahmed},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Shaker},
    cris = {https://cris.fau.de/converis/publicweb/publication/108311764},
    year = {2016},
    month = {12},
    day = {29},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783844049305},
    peerreviewed = {automatic},
    title = {Broadband Low Power Transmitter Based in SiGe Technology on Maximum Length Sequences},
    type = {Dissertation},
    }
  • V. Silva Cortes, R. Weigel, G. Fischer, and A. Hagelauer, "High Power Effects on a MEMS-based Tunable Matching Network for Power Amplifier Reconfigurability" in Latin America Microwave Conference 2016, Puerto Vallarta, Mexico, 2016. [Bibtex]
    @inproceedings{silva2016b,
    abstract = {In this work, the thermal effects on a tunable matching network (TMN) based on micro electro mechanical system (MEMS) are investigated. A capacitive MEMS switch acts as the active component in a TMN that provides reconfigurability on the PA architecture. However, the large signal operation of the PA causes the membrane of the MEMS switch to heat up, leading to variations of its intrinsic characteristics. These effects are modeled and their influence on the linearity of the PA addressed. The study is aided by a behavioral model of the capacitive MEMS switch with the additional modeling of the thermal effects that raise due to power dissipation at the MEMS’s membrane. The PA architecture is based on a commercial process design kit for the PA and the geometrical and material characteristics of an available MEMS switch.},
    author = {Silva Cortes, Victor and Weigel, Robert and Fischer, Georg and Hagelauer, Amelie},
    publisher = {IEEE MTT-S},
    booktitle = {Latin America Microwave Conference 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/108667064},
    year = {2016},
    month = {12},
    day = {12},
    eventdate = {2016-12-12/2016-12-14},
    eventtitle = {Latin America Microwave Conference 2016},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {High Power Effects on a MEMS-based Tunable Matching Network for Power Amplifier Reconfigurability},
    venue = {Puerto Vallarta, Mexico},
    }
  • M. Müller, K. Reiter, and D. Werner, "LED-Beleuchtung in der Nutztierhaltung" in Der energieeffiziente Bauernhof, 2016. [Bibtex]
    @inproceedings{mueller2016,
    author = {Müller, Maike and Reiter, Klaus and Werner, Daniel},
    booktitle = {Der energieeffiziente Bauernhof},
    cris = {https://cris.fau.de/converis/publicweb/publication/203226030},
    year = {2016},
    month = {12},
    day = {02},
    eventdate = {2016-12-02/2016-12-02},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED-Beleuchtung in der Nutztierhaltung},
    type = {Konferenzschrift},
    }
  • M. Kloc, R. Weigel, and A. Koelpin, "Enhancing the Real-Time Performance of a Wireless Hardware-in-the-Loop Test System in ISM Bands" in Advances in Wireless and Optical Communications (RTUWO), 2016, pp. 167-172. [DOI] [Bibtex]
    @inproceedings{kloc2016c,
    author = {Kloc, Matej and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {Advances in Wireless and Optical Communications (RTUWO)},
    cris = {https://cris.fau.de/converis/publicweb/publication/123904484},
    year = {2016},
    month = {11},
    doi = {10.1109/RTUWO.2016.7821877},
    eventtitle = {Advances in Wireless and Optical Communications (RTUWO)},
    faupublication = {yes},
    pages = {167--172},
    peerreviewed = {Yes},
    title = {Enhancing the Real-Time Performance of a Wireless Hardware-in-the-Loop Test System in ISM Bands},
    type = {Konferenzschrift},
    }
  • S. Linz, F. Oesterle, S. Lindner, S. Mann, R. Weigel, and A. Koelpin, "Test Method for Contactless On-wafer MEMS Characterization and Production Monitoring", IEEE Transactions on Microwave Theory and Techniques, vol. 64, iss. 11, pp. 3918-3926, 2016. [DOI] [Bibtex]
    @article{linz2016,
    author = {Linz, Sarah and Oesterle, Florian and Lindner, Stefan and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/108102104},
    year = {2016},
    month = {11},
    doi = {10.1109/TMTT.2016.2612664},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {11},
    pages = {3918--3926},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Test Method for Contactless On-wafer MEMS Characterization and Production Monitoring},
    volume = {64},
    }
  • D. Werner, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "Optimale Beleuchtung im Schafstall" in Fachtagung Energieeffizienz und e-Mobilität in der Landwirtschaft, Innsbruck, Austria, 2016. [Bibtex]
    @inproceedings{werner2016c,
    author = {Werner, Daniel and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {Fachtagung Energieeffizienz und e-Mobilität in der Landwirtschaft},
    cris = {https://cris.fau.de/converis/publicweb/publication/203226703},
    year = {2016},
    month = {11},
    day = {25},
    eventdate = {2016-11-25/2016-11-25},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Optimale Beleuchtung im Schafstall},
    type = {Konferenzschrift},
    venue = {Innsbruck, Austria},
    }
  • D. Werner, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "Ein Licht geht auf! Bedeutung und Umsetzungsmöglichkeiten von Beleuchtung im Stall" in 11. Internationale Bioland Schaf- und Ziegentagung, Buchenau, 2016. [Bibtex]
    @inproceedings{werner2016d,
    author = {Werner, Daniel and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {11. Internationale Bioland Schaf- und Ziegentagung},
    cris = {https://cris.fau.de/converis/publicweb/publication/203226354},
    year = {2016},
    month = {11},
    day = {28},
    eventdate = {2016-11-28/2016-11-30},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Ein Licht geht auf! Bedeutung und Umsetzungsmöglichkeiten von Beleuchtung im Stall},
    type = {Konferenzschrift},
    venue = {Buchenau},
    }
  • M. Dietz, G. A. Guarin Aristizabal, M. Hofmann, I. Nasr, J. Nehring, B. Lämmle, A. Schwarzmeier, K. Aufinger, A. Hagelauer, G. Fischer, R. Weigel, and D. Kissinger, "Wearables with integrated Microwave-Sensors for Internet-of-Things-Applications (IoT) in the sector of health-care: An overview" in VDE Kongress 2016: Internet der Dinge, Mannheim, 2016, pp. 1-6. [Bibtex]
    @inproceedings{dietz2016a,
    author = {Dietz, Marco and Guarin Aristizabal, Gustavo Adolfo and Hofmann, Maximilian and Nasr, Ismail and Nehring, Johannes and Lämmle, Benjamin and Schwarzmeier, Andre and Aufinger, Klaus and Hagelauer, Amelie and Fischer, Georg and Weigel, Robert and Kissinger, Dietmar},
    publisher = {VDE},
    booktitle = {VDE Kongress 2016: Internet der Dinge},
    cris = {https://cris.fau.de/converis/publicweb/publication/108126524},
    year = {2016},
    month = {11},
    day = {07},
    eventdate = {2016-11-07/2016-11-08},
    faupublication = {yes},
    pages = {1--6},
    peerreviewed = {unknown},
    title = {Wearables with integrated Microwave-Sensors for Internet-of-Things-Applications (IoT) in the sector of health-care: An overview},
    venue = {Mannheim},
    }
  • D. Schuklin, D. Hohnloser, T. Lieske, M. Reichenbach, A. Bänisch, B. Pfundt, J. Röber, R. Weigel, and D. Fey, "Systemkonzept eines autarken und intelligenten Miniatur-Sensors für Smart Home" in VDE Kongress 2016: Internet der Dinge, 2016. [Bibtex]
    @inproceedings{shuklin2016,
    abstract = {Trotz der erheblichen Fortschritte im Bereich Smart Home, stellt die Installation von Hunderten von Sensoren eine der größten Herausforderungen dar. Eine mögliche Lösung für dieses Problem ist die Integration aller Komponenten innerhalb einer integrierten Schaltung. Dieser Beitrag stellt ein Konzept für ein intelligentes Sensorsystem dar, welches die wichtigsten Sensoren für das intelligente Zuhause (wie z.B. Drucksensor, Gassensor, Temperatur-, oder Lichtsensor) auf einem Chip vereint. Dadurch wird das Messen von lokalen Temperaturen, Lichtverhältnissen, Drucks und sogar Luftqualität ermöglicht. Mit diesen umfassenden Informationen können lebensunterstützende Systeme, Einbruchsdetektion, automatisierte Klimaregelung und Beleuchtungssteuerung in Räumen und vieles mehr realisiert werden. Langfristiges Ziel dieser Arbeit ist die Entwicklung eines selbst organisierenden und autonomen Netzwerks von intelligenten Sensoren im Bereich Smart Home. Mit Abmessungen von wenigen Zentimetern, kann jeder Sensor nahezu überall angebracht werden, wie zum Beispiel an einem Fenster.},
    author = {Schuklin, Dennis and Hohnloser, Daniel and Lieske, Tobias and Reichenbach, Marc and Bänisch, Andreas and Pfundt, Benjamin and Röber, Jürgen and Weigel, Robert and Fey, Dietmar},
    booktitle = {VDE Kongress 2016: Internet der Dinge},
    cris = {https://cris.fau.de/converis/publicweb/publication/119421544},
    year = {2016},
    month = {11},
    eventtitle = {VDE Kongress 2016: Internet der Dinge},
    faupublication = {yes},
    keywords = {Smart Home; Intelligent Sensor System; MEMS Sensor; Analog to Digital Converter; Digital Processing Unit},
    peerreviewed = {Yes},
    title = {Systemkonzept eines autarken und intelligenten Miniatur-Sensors für Smart Home},
    }
  • D. Werner, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "LED - das neue Licht am Bauernhof" in Energieeffizienz und e-Mobilität in der Landwirtschaft – Innovative Energiesparlösungen für die Zukunft, Graz, Austria, 2016. [Bibtex]
    @inproceedings{werner2016b,
    author = {Werner, Daniel and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {Energieeffizienz und e-Mobilität in der Landwirtschaft – Innovative Energiesparlösungen für die Zukunft},
    cris = {https://cris.fau.de/converis/publicweb/publication/203227400},
    year = {2016},
    month = {11},
    day = {17},
    eventdate = {2016-11-17/2016-11-17},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED - das neue Licht am Bauernhof},
    type = {Konferenzschrift},
    venue = {Graz, Austria},
    }
  • B. Sanftl, T. Magel, M. Trautmann, R. Weigel, and A. Koelpin, "A Robust Light-Weight Protocol Stack for Data Transmission within Inductive Power Transfer Systems" in ApMediaCast2016 Asia Pacific Conference on Multimedia and Broadcasting, Kuta, Bali, Indonesia, 2016. [DOI] [Bibtex]
    @inproceedings{sanftl2016c,
    author = {Sanftl, Benedikt and Magel, Thomas and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE ComSoc},
    booktitle = {ApMediaCast2016 Asia Pacific Conference on Multimedia and Broadcasting},
    cris = {https://cris.fau.de/converis/publicweb/publication/108121904},
    year = {2016},
    month = {11},
    doi = {10.1109/APMEDIACAST.2016.7878179},
    eventtitle = {ApMediaCast2016 Asia Pacific Conference on Multimedia and Broadcasting},
    faupublication = {yes},
    keywords = {IPT; Inductive Data Communication; protocol design; wireless communication; signal processing},
    peerreviewed = {Yes},
    title = {A Robust Light-Weight Protocol Stack for Data Transmission within Inductive Power Transfer Systems},
    venue = {Kuta, Bali, Indonesia},
    }
  • S. Wibbing, S. Mann, F. Lurz, M. Frank, R. Weigel, and A. Koelpin, "Radarbasierte und vernetzte Umfeldsensorik zur autonomen Steuerung von Industrierobotern" in VDE Kongress 2016: Internet der Dinge, Mannheim, Germany, 2016, pp. 1-6. [Bibtex]
    @inproceedings{wibbing2016b,
    abstract = {Im Zuge der so genannten vierten industriellen Revolution, kurz Industrie 4.0 genannten Initiative der Bundesregierung ist ein Hauptmerkmal die dynamische Anpassung von bislang unflexiblen Produktionseinrichtungen auf sich wechselnde Anforderungen und Umgebungsfaktoren. Besonders in Bezug auf autonom agierende Systeme wie beispielsweise Industrieroboter werden zur Realisierung solcher Anforderungen vor allem leistungsfähige Sensoren und Steuerungen benötigt. In diesem Artikel wird ein vernetztes Sensorsystem bestehend aus mehreren RADAR-Sensoren beschrieben, welche durch mehrdimensionale Sensordatenfusion ein 3D-Bild der Umgebung erstellen. Zur Vernetzung werden dabei vor allem bestehende und etablierte Netzwerktechniken zur Datenübertragung verwendet. Die Systemarchitektur und die Komponenten eines einzelnen Sensorknotens sowie der zentralen Steuereinheit werden im Detail erörtert. Im Anschluss daran werden verschiedene Messungen hinsichtlich Performanz und Auflösung präsentiert und erläutert.},
    author = {Wibbing, Sascha and Mann, Sebastian and Lurz, Fabian and Frank, Martin and Weigel, Robert and Koelpin, Alexander},
    language = {German},
    publisher = {VDE},
    booktitle = {VDE Kongress 2016: Internet der Dinge},
    cris = {https://cris.fau.de/converis/publicweb/publication/122583604},
    year = {2016},
    month = {11},
    day = {07},
    eventdate = {2016-11-07/2016-11-08},
    faupublication = {yes},
    isbn = {9783800743087},
    pages = {1--6},
    peerreviewed = {Yes},
    title = {Radarbasierte und vernetzte Umfeldsensorik zur autonomen Steuerung von Industrierobotern},
    venue = {Mannheim, Germany},
    }
  • J. Röber, "In CMOS integriertes Mehrantennen-Diversity-Empfangssystem für digitales Satellitenradio", 2016. [Bibtex]
    @phdthesis{roeber2016a,
    author = {Röber, Jürgen},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/119755724},
    year = {2016},
    month = {11},
    day = {21},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783944057934},
    peerreviewed = {automatic},
    title = {In CMOS integriertes Mehrantennen-Diversity-Empfangssystem für digitales Satellitenradio},
    type = {Dissertation},
    }
  • I. Nasr, J. Nehring, M. Schütz, M. Dietz, I. Nasr, K. Aufinger, R. Weigel, and D. Kissinger, "Highly Integrated 4-32-GHz Two-Port Vector Network Analyzers for Instrumentation and Biomedical Applications", IEEE Transactions on Microwave Theory and Techniques, pp. 1-16, 2016. [DOI] [Bibtex]
    @article{nehring2016a,
    abstract = {This paper addresses the miniaturization of microwave vector network analyzers (VNAs) and the future vision of the VNA on a chip. Therefore, a highly integrated two-port VNA with a multioctave bandwidth from 4 to 32 GHz is presented. The proposed system is based on a fully integrated radio-frequency frontend consisting of a two-port stimulus, a four-channel heterodyne receiver, and a wideband testset. The testset is comprised of on-chip multisection directional couplers. The chip is operated inside a hardware demonstrator using a 16-term calibration procedure. The measurement of arbitrary devices under test is in excellent agreement with commercial measurement equipment and showed a mean deviation from the reference measurement of 0.17 dB and 1.29° regarding the forward transmission of a coaxial 30-dB attenuator. The system and receiver dynamic ranges are 44-77 and 82-101 dB at a resolution bandwidth of 100 kHz over the full system bandwidth. The measurements are highly repeatable and are robust against drift over time. As a proof of concept, the developed integrated network analyzers are utilized in a biomedical sensing scenario with an external and an on-chip sensor. Both approaches showed good sensitivity regarding the mixture ratio of binary solutions of ethanol and methanol.},
    author = {Nasr, Ismail and Nehring, Johannes and Schütz, Martin and Dietz, Marco and Nasr, Ismail and Aufinger, Klaus and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    publisher = {Institute of Electrical and Electronics Engineers (IEEE)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124228764},
    year = {2016},
    month = {11},
    doi = {10.1109/TMTT.2016.2616873},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    pages = {1--16},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Highly Integrated 4-32-GHz Two-Port Vector Network Analyzers for Instrumentation and Biomedical Applications},
    }
  • S. Senega, J. Röber, A. Nassar, R. Weigel, C. Heuer, and S. Lindenmeier, "Compact Scan-Phase Antenna Diversity Related System Considerations" in European Microwave Week, London, 2016, p. 4. [Bibtex]
    @inproceedings{senega2016,
    abstract = {An integrated antenna diversity system is described which enables a high increase of reception performance for satellite digital audio radio services (SDARS). A detailed analysis is given for the gain and noise figure requirements specifically regarding the implementation in an integrated circuit. In this contribution a compact integrated diversity system is specified and its realization is described. Also sufficient immunity to high level interferers must be ensured which can be in close proximity as far as frequency distance is concerned. On base of the specified values the system provides an overall gain of 26.8 dB with a noise figure of 0.84 dB including the single rf cable connecting the diversity antenna set to the unmodified standard SDARS receiver. A hardware demonstrator of our scan-phase antenna diversity system is presented in which the phase aligned rf combining and signal selection is implemented in a compact IC with a package size of only 8mm by 8 mm. Measurement results with recorded Rayleigh fading signals from a test drive in the US with a duration of 290 s show a reduction of audio mutes from 29.8 s of the best single antenna to only 4.1 s with our scan-phase antenna diversity demonstrator.},
    author = {Senega, Simon and Röber, Jürgen and Nassar, Ali and Weigel, Robert and Heuer, Christian and Lindenmeier, Stefan},
    publisher = {IEEE},
    booktitle = {European Microwave Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/124158804},
    year = {2016},
    month = {10},
    eventtitle = {European Microwave Week},
    faupublication = {yes},
    pages = {4},
    peerreviewed = {Yes},
    title = {Compact Scan-Phase Antenna Diversity Related System Considerations},
    venue = {London},
    }
  • W. Bauer, J. Kohl, J. Bäsig, S. Rübesam, and D. Fey, "Generation of Executable Runtime Constrained Random Programs Functional Processor Verification" in ESM 2016, Gran Canaria, Spain, 2016, pp. 256-263. [Bibtex]
    @inproceedings{bauer2016,
    abstract = {The functional verification of multi-issue deep pipeline processor architectures exceeds the complexity level manageable with static test methods. A randomized approach including automatic test program generation leads to instruction sequences not anticipated and reaches the verification requirements. The challenge is to generate programs that on the one hand are deterministic and terminate for all possible inputs and on the other hand cover the entire instruction set. Moreover for out of order architectures the dependencies between instructions must be taken into account and therefore the instruction sequencing must be part of the coverage. In this paper we present a random program generation technique that produces executable runtime self-constraining deterministic random programs for processor verification. The core elements are a template based program flow generation, program termination certainty and runtime error protection. To avoid unpredictable or illegal situations during program execution value constraining blocks are added to program areas with uncertain behavior.},
    author = {Bauer, Wolfgang and Kohl, Johannes and Bäsig, Jürgen and Rübesam, Stefan and Fey, Dietmar},
    publisher = {EUROSIS},
    booktitle = {ESM 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/111075844},
    year = {2016},
    month = {10},
    day = {26},
    eventdate = {2016-10-26/2016-10-28},
    eventtitle = {The European Simulation and Modelling Conferences},
    faupublication = {yes},
    isbn = {9789077381953},
    keywords = {Branch behavior verification; Functional processor verification; Instruction sequence coverage; Random program generation},
    pages = {256--263},
    peerreviewed = {Yes},
    title = {Generation of Executable Runtime Constrained Random Programs Functional Processor Verification},
    venue = {Gran Canaria, Spain},
    volume = {30},
    }
  • E. Schwenzfeier-Hellkamp, D. Werner, and K. Gabel, "Energy efficiency with LED lighting - Example of the historic city centre Rietberg" in CiTEDS Congreso Internacional de CIENCIA, TECNOLOGíA Y EDUCACIóN para el Desarrollo Sostenible, Leon, Nicaragua, 2016. [Bibtex]
    @inproceedings{schwenzfeier-hellkamp2016,
    author = {Schwenzfeier-Hellkamp, Eva and Werner, Daniel and Gabel, Kristin},
    language = {English},
    booktitle = {CiTEDS Congreso Internacional de CIENCIA, TECNOLOGíA Y EDUCACIóN para el Desarrollo Sostenible},
    cris = {https://cris.fau.de/converis/publicweb/publication/203228145},
    year = {2016},
    month = {10},
    day = {21},
    eventdate = {2016-10-21/2016-10-21},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Energy efficiency with LED lighting - Example of the historic city centre Rietberg},
    type = {Konferenzschrift},
    venue = {Leon, Nicaragua},
    }
  • A. Gharib, R. Weigel, and D. Kissinger, "A Versatile 10–80-Gb/s PRBS-Based Broadband Transmitter With Arbitrary 20–60-GHz Spectrum Shifting", IEEE Transactions on Microwave Theory and Techniques, pp. 3654-3666, 2016. [DOI] [Bibtex]
    @article{gharib2016,
    author = {Gharib, Ahmed and Weigel, Robert and Kissinger, Dietmar},
    cris = {https://cris.fau.de/converis/publicweb/publication/121825044},
    year = {2016},
    month = {10},
    doi = {10.1109/TMTT.2016.2606629},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    pages = {3654--3666},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {A Versatile 10–80-Gb/s PRBS-Based Broadband Transmitter With Arbitrary 20–60-GHz Spectrum Shifting},
    }
  • C. Blümm, "Maximizing OFDM Performance through Real Time Adaptivity", 2016. [Bibtex]
    @phdthesis{bluemm2016,
    author = {Blümm, Christian},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/121686004},
    year = {2016},
    month = {10},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Maximizing OFDM Performance through Real Time Adaptivity},
    type = {Dissertation},
    }
  • D. Hohnloser, D. Schuklin, C. Schmidt, M. Kreitmaier, M. Blasini, A. Hagelauer, and R. Weigel, "Feasibility Analysis of a Novel Production Method for Monolithic Integrated MEMS with Nanogaps" in IEEE Sensors, Orlando, FL, USA, 2016, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{hohnloser2016,
    abstract = {This paper analyses a novel production technique for the fabrication of microelectromechanical system (MEMS) with a gap in the scale of nanometer. The technology is based on a density-changing layer, which let a gap arise through the shrinkage of this layer. After the description of the technology, the requirements for monolithic integration and CMOS compatibility with respect to this technology are worked out. It has been discovered that there are several challenges to be overcome, especially to find a material composition which match the requirements will be important as well as to set up the process without affecting other CMOS device parameters. But if these challenges are solved the process will be suitable for various applications and enable to open up new markets.},
    author = {Hohnloser, Daniel and Schuklin, Dennis and Schmidt, Carsten and Kreitmaier, Michael and Blasini, Mario and Hagelauer, Amelie and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {IEEE Sensors},
    cris = {https://cris.fau.de/converis/publicweb/publication/108092424},
    year = {2016},
    month = {10},
    day = {30},
    doi = {10.1109/ICSENS.2016.7808655},
    eventdate = {2016-10-30/2016-11-02},
    faupublication = {yes},
    keywords = {MEMS; NEMS},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Feasibility Analysis of a Novel Production Method for Monolithic Integrated MEMS with Nanogaps},
    venue = {Orlando, FL, USA},
    }
  • D. Fey, M. Reichenbach, C. Söll, M. Biglari, J. Röber, and R. Weigel, "Using Memristor Technology for Multi-value Registers in Signed-digit Arithmetic Circuits" in Proceedings of the Second International Symposium on Memory Systems, Alexandria, VA, USA, 2016, pp. 442-454. [DOI] [Bibtex]
    @inproceedings{fey2016a,
    abstract = {

    Signed-digit (SD) arithmetic exploits positive and negative digits requiring more than two states. It is long known that an addition using trits, i.e. each digit stores not only a 0 or a 1 but also either 2 or -1, requires only a constant number of steps independent of the operands' word length. However, current processors could not profit from that due to the lack of fast, dense and CMOS compatible memory cells that can store reliably multiple states. Memristors offer these features making it necessary to re-evaluate different SD number representations and to evaluate the consequences of an implementation of a multi-value register file with memristors concerning latency, area and energy consumption.

    Using memristors as multi-value register reduces latency and area on one side compared to flip-flop based memories. On the other side this requires additional sophisticated control circuitry to implement ADCs/DACs, current limiting circuits and to generate control signals to read, write and erase memristors. The paper determines the break-even points at which ternary circuits attached to memristor based registers show better energy-delay products and less area consumption and how much power consumption these improvements cost. By layout synthesis is shown that ternary adders with trit-storing memristors can reduce the latency for a word length of 16 digits about 19% and about 52% for 512 digits compared to a binary carry-look-ahead (CLA) adder with nearly the same power consumption.

    }, author = {Fey, Dietmar and Reichenbach, Marc and Söll, Christopher and Biglari, Mehrdad and Röber, Jürgen and Weigel, Robert}, language = {English}, publisher = {ACM}, booktitle = {Proceedings of the Second International Symposium on Memory Systems}, cris = {https://cris.fau.de/converis/publicweb/publication/108131584}, year = {2016}, month = {10}, day = {03}, doi = {10.1145/2989081.2989124}, eventdate = {2016-10-03/2016-10-06}, eventtitle = {The International Symposium on Memory Systems (MEMSYS)}, faupublication = {yes}, isbn = {9781450343053}, keywords = {Signed-digit arithmetic multi-bit memristors memristive computing; multi-bit memristors; memristive computing; GRK}, pages = {442--454}, peerreviewed = {Yes}, title = {Using Memristor Technology for Multi-value Registers in Signed-digit Arithmetic Circuits}, type = {Journal Article}, url = {https://dl.acm.org/citation.cfm?id=2989124}, venue = {Alexandria, VA, USA}, }
  • A. Talai, "Broadband Characterization of Launchers and Transitions", pp. 1-4, 2016. [Bibtex]
    @other{talai2016b,
    abstract = {Characterizing material properties with a high degree of precision requires very accurate sensors, which means that the properties of the sensor itself must also be accurately characterized. Simulation allows the properties of elements of the test equipment to be calculated in isolation or be integrated into the simulation model for the test set-up, and allows the design of the sensor to be optimized. This article will demonstrate how CST® STUDIO SUITE® was used to simulate and optimize a coaxial-microstrip transition for a material characterization measurement system, including the effect of the probes themselves, and analyze the effect of surface roughness on the properties of the sensor.},
    author = {Talai, Armin},
    publisher = {CST – Computer Simulation Technology AG},
    booktitle = {CST APPLICATION ARTICLE},
    cris = {https://cris.fau.de/converis/publicweb/publication/108128064},
    year = {2016},
    month = {10},
    faupublication = {yes},
    keywords = {Launchers; Transitions; Material Characterization; Surface Roughness},
    pages = {1--4},
    peerreviewed = {No},
    title = {Broadband Characterization of Launchers and Transitions},
    type = {online publication},
    url = {https://www.cst.com/Content/Articles/article1124/CST_Application_Article__Broadband%20Characterization%20of%20launchers-Web.pdf},
    }
  • D. Werner, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "Intelligente LED-Leuchte für die Funktionsbereiche „Fressen“, „Liegen“ und „Laufen“ in der Milchviehhaltung" in BLE Innovationstage 2016, Bonn, 2016. [Bibtex]
    @inproceedings{werner2016a,
    author = {Werner, Daniel and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    booktitle = {BLE Innovationstage 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/203227722},
    year = {2016},
    month = {10},
    day = {26},
    eventdate = {2016-10-26/2016-10-26},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Intelligente LED-Leuchte für die Funktionsbereiche „Fressen“, „Liegen“ und „Laufen“ in der Milchviehhaltung},
    type = {Konferenzschrift},
    venue = {Bonn},
    }
  • C. Erhart, S. Lutz, T. Walter, H. Mantz, P. Hügler, and R. Weigel, "Design and demonstration of a full polarimetric sensor for surface texture characterisation" in European Microwave Conference, London, UK, 2016, pp. 1-4. [Bibtex]
    @inproceedings{erhart2016,
    author = {Erhart, Christian and Lutz, Steffen and Walter, Thomas and Mantz, Hubert and Hügler, Philipp and Weigel, Robert},
    booktitle = {European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/121599544},
    year = {2016},
    month = {10},
    day = {05},
    eventdate = {2016-10-05/2016-10-07},
    eventtitle = {13th European Radar Conference (EuRAD)},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Design and demonstration of a full polarimetric sensor for surface texture characterisation},
    url = {http://ieeexplore.ieee.org/document/7811680/},
    venue = {London, UK},
    }
  • M. Kloc, R. Weigel, and A. Koelpin, "Making Real-Time Hardware-in-the-Loop Testing of Automotive Electronic Control Units Wireless" in Advanced Technologies for Communications (ATC), 2016, pp. 407-412. [DOI] [Bibtex]
    @inproceedings{kloc2016b,
    author = {Kloc, Matej and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {Advanced Technologies for Communications (ATC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108105404},
    year = {2016},
    month = {10},
    doi = {10.1109/ATC.2016.7764816},
    eventtitle = {Advanced Technologies for Communications (ATC)},
    faupublication = {yes},
    pages = {407--412},
    peerreviewed = {Yes},
    title = {Making Real-Time Hardware-in-the-Loop Testing of Automotive Electronic Control Units Wireless},
    }
  • G. Donati, C. Musolff, G. Gottardo, D. Popp, and G. Fischer, "Physically inspired digital predistortion for doherty power ampliers and automatic in-situ identication" in Fifth International Conference on Telecommunications and Remote Sensing, Mailand, Italy, 2016. [DOI] [Bibtex]
    @inproceedings{donati2016,
    author = {Donati, Giovanni and Musolff, Christian and Gottardo, Giuseppe and Popp, Daniel and Fischer, Georg},
    language = {English},
    booktitle = {Fifth International Conference on Telecommunications and Remote Sensing},
    cris = {https://cris.fau.de/converis/publicweb/publication/203357639},
    year = {2016},
    month = {10},
    day = {10},
    doi = {10.5220/0006227100530060},
    eventdate = {2016-10-10/2016-10-11},
    faupublication = {yes},
    isbn = {9789897582004},
    peerreviewed = {Yes},
    title = {Physically inspired digital predistortion for doherty power ampliers and automatic in-situ identication},
    type = {Konferenzschrift},
    url = {http://www.ictrs.org/Documents/ProceedingsOfFifthICTRS.pdf},
    venue = {Mailand, Italy},
    }
  • L. Shi, M. Berger, B. Bier, C. Söll, J. Röber, R. Fahrig, B. Eskofier, A. Maier, and J. Maier, "Analog Non-Linear Transformation-Based Tone Mapping for Image Enhancement in C-arm CT" in IEEE Medical Imaging Conference (MIC), Strasbourg, France, 2016. [Bibtex]
    @inproceedings{shi2016a,
    abstract = {Flat-Panel C-arm Computed Tomography (CT) suffers from pixel saturation due to the detector’s limited dynamic range. We describe a novel approach to analog, non-linear tone mapping (TM) for preventing detector saturation. An analog TM operator (TMO) applies a non-linear transformation in a CMOS sensor and its inverse TMO based on 14-bit digital raw data. This is done in order to prevent overexposure and to enhance image quality to 32 bits. The method was applied to the cases of low-contrast head imaging and to that of imaging both knees. Cone-beam projection data with and without overexposure was simulated for a 200° short-scan of the knees and a 360° full-scan of a Forbild head phantom. The results show an increased correlation coefficient of 0.99 compared to 0.96 for overexposed knee data and a higher low-contrast visibility (CC=0.99) compared to linear quantization (CC=0.97).},
    author = {Shi, Lan and Berger, Martin and Bier, Bastian and Söll, Christopher and Röber, Jürgen and Fahrig, Rebecca and Eskofier, Björn and Maier, Andreas and Maier, Jennifer},
    booktitle = {IEEE Medical Imaging Conference (MIC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/109689624},
    year = {2016},
    month = {10},
    faupublication = {yes},
    keywords = {GRK-1773},
    peerreviewed = {Yes},
    title = {Analog Non-Linear Transformation-Based Tone Mapping for Image Enhancement in C-arm CT},
    venue = {Strasbourg, France},
    }
  • J. Kirchner, N. Roth, A. Meyer, and G. Fischer, "ECG Measurement by Use of Passive Capacitively Coupled Electrodes" in Proc. IEEE Sensors Conf., Orlando, FL, USA, 2016. [DOI] [Bibtex]
    @inproceedings{kirchner2016,
    abstract = {The prototype of a capacitive ECG measurement device with purely passive signal transmission between electrodes and differential amplifier is presented. This design is intended to improve transmission symmetry and thus common-mode rejection. The feasibility of the approach is demonstrated by measurements with different materials between body surface and electrodes. The ECG module shall be incorporated in a mobile sensor platform in the form of a plaster for the monitoring of chronic diseases.},
    author = {Kirchner, Jens and Roth, Nils and Meyer, Andreas and Fischer, Georg},
    booktitle = {Proc. IEEE Sensors Conf.},
    cris = {https://cris.fau.de/converis/publicweb/publication/109800504},
    year = {2016},
    month = {10},
    day = {30},
    doi = {10.1109/ICSENS.2016.7808736},
    eventdate = {2016-10-30/2016-11-02},
    eventtitle = {IEEE Sensors},
    faupublication = {yes},
    keywords = {electrocardiogram; ECG; capacitive electrodes; passive channel; chronic disease monitoring},
    peerreviewed = {Yes},
    title = {ECG Measurement by Use of Passive Capacitively Coupled Electrodes},
    venue = {Orlando, FL, USA},
    }
  • S. Lindner, R. Weigel, and A. Koelpin, "A Low-Cost Laser Barrier Based Vectorial Velocity Measurement System" in IEEE Sensors, Orlando, FL, USA, 2016, pp. 289-291. [DOI] [Bibtex]
    @inproceedings{lindner2016,
    abstract = {This paper describes a low-cost measurement system based on two crossed laser barriers to measure the angle, the position as well as the velocity of an object with known shape, which is passing the measurement system. Due to the simple system setup this leads to a low-cost vectorial speed measurement system, which is capable of high speed measurements. Furthermore, as a demonstrator, a table soccer ball speed measurement system will be presented, which shows the feasibility of the proposed system.},
    author = {Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Sensors},
    cris = {https://cris.fau.de/converis/publicweb/publication/108123444},
    year = {2016},
    month = {10},
    day = {30},
    doi = {10.1109/ICSENS.2016.7808494},
    eventdate = {2016-10-30/2016-11-02},
    faupublication = {yes},
    isbn = {9781479982875},
    keywords = {angle of arrival; velocity measurement; laser barrier; crossed laser; table soccer},
    pages = {289--291},
    peerreviewed = {No},
    title = {A Low-Cost Laser Barrier Based Vectorial Velocity Measurement System},
    venue = {Orlando, FL, USA},
    }
  • V. Issakov, M. Wojnowski, H. Knapp, S. Trotta, H. Forstner, K. Pressel, and A. Hagelauer, "Co-simulation and Co-design of Chip-Package-Board Interfaces in Highly-Integrated RF Systems" in IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), New Brunswick, NJ, USA, 2016, pp. 94-101. [DOI] [Bibtex]
    @inproceedings{issakov2016,
    abstract = {The level of integration for RF and mm-wave systems is continuously increasing. Highly-integrated system on chip solutions have to be encapsulated in a package and assembled on a board. In addition, to be more attractive as a product, the trend goes towards further integration of passives and antennas in a package. This drives the system in package solutions. However, electrical properties of the package and board may have a significant effect on system parameters, especially at high frequencies. Hence, layout features of package and board must be carefully modelled and considered during the design. Furthermore, it is often insufficient to model chip, package and board separately, as some high-frequency effects may not be captured. An example is electromagnetic coupling between integrated coils on chip and routing traces in package. In this paper we describe considerations on co-simulation and co-design of highlyintegrated RF systems by means of accurate electromagnetic modelling. We demonstrate the approach and various aspects of chip-package-board co-design based on examples of systems for various applications: 6 GHz VCO using embedded inductor; backhaul communication system in package for V-band and Eband and a four-channel 77 GHz automotive radar transceiver in a package with four dipole antennas.},
    author = {Issakov, Vadim and Wojnowski, Maciej and Knapp, Herbert and Trotta, Saverio and Forstner, Hans-Peter and Pressel, Klaus and Hagelauer, Amelie},
    publisher = {IEEE},
    booktitle = {IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124176184},
    year = {2016},
    month = {09},
    day = {25},
    doi = {10.1109/BCTM.2016.7738959},
    eventdate = {2016-09-25/2016-09-27},
    faupublication = {yes},
    pages = {94--101},
    peerreviewed = {Yes},
    title = {Co-simulation and Co-design of Chip-Package-Board Interfaces in Highly-Integrated RF Systems},
    venue = {New Brunswick, NJ, USA},
    }
  • A. Tag, "Multiphysikalische Modellierung und Optimierung von HF-BAW-Komponenten", 2016. [Bibtex]
    @phdthesis{tag2016b,
    author = {Tag, Andreas},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/108310664},
    year = {2016},
    month = {09},
    day = {06},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783944057637},
    peerreviewed = {automatic},
    title = {Multiphysikalische Modellierung und Optimierung von HF-BAW-Komponenten},
    type = {Dissertation},
    }
  • P. Kindt, D. Yunge, A. Tobola, G. Fischer, and S. Chakraborty, "Dynamic Service Switching for the Medical Internet of Things" in IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Valencia, Spain, 2016, pp. 1-7. [DOI] [Bibtex]
    @inproceedings{kindt2016,
    author = {Kindt, Philipp and Yunge, Daniel and Tobola, Andreas and Fischer, Georg and Chakraborty, Samarjit},
    booktitle = {IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108125424},
    year = {2016},
    month = {09},
    day = {04},
    doi = {10.1109/PIMRC.2016.7794845},
    eventdate = {2016-09-04/2016-09-08},
    faupublication = {yes},
    pages = {1--7},
    peerreviewed = {unknown},
    title = {Dynamic Service Switching for the Medical Internet of Things},
    venue = {Valencia, Spain},
    }
  • A. El Assaad, M. Krug, and G. Fischer, "Highly Accurate Distance Estimation Using Spatial Filtering and GNSS in Urban Environments" in Vehicular Technology Conference-VTC2016-Fall, Montreal, Canada, 2016. [DOI] [Bibtex]
    @inproceedings{assaad2016c,
    author = {El Assaad, Ahmad and Krug, Markus and Fischer, Georg},
    booktitle = {Vehicular Technology Conference-VTC2016-Fall},
    cris = {https://cris.fau.de/converis/publicweb/publication/122831104},
    year = {2016},
    month = {09},
    day = {18},
    doi = {10.1109/VTCFALL.2016.7881034},
    eventdate = {2016-09-18/2016-09-21},
    eventtitle = {IEEE-Vehicular Technology ConferenceVTC2016-Fall},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Highly Accurate Distance Estimation Using Spatial Filtering and GNSS in Urban Environments},
    type = {Konferenzschrift},
    venue = {Montreal, Canada},
    }
  • A. Koelpin, F. Lurz, S. Linz, S. Mann, C. Will, and S. Lindner, "Six-Port Based Interferometry for Precise Radar and Sensing Application", Sensors, vol. 16, iss. 10, pp. 1-26, 2016. [DOI] [Bibtex]
    @article{koelpin2016,
    author = {Koelpin, Alexander and Lurz, Fabian and Linz, Sarah and Mann, Sebastian and Will, Christoph and Lindner, Stefan},
    publisher = {MDPI},
    cris = {https://cris.fau.de/converis/publicweb/publication/108125864},
    year = {2016},
    month = {09},
    doi = {10.3390/S16101556},
    faupublication = {yes},
    issn = {1424-8220},
    journaltitle = {Sensors},
    number = {10},
    pages = {1--26},
    peerreviewed = {Yes},
    shortjournal = {SENSORS-BASEL},
    title = {Six-Port Based Interferometry for Precise Radar and Sensing Application},
    type = {online publication},
    volume = {16},
    }
  • V. Chauhan, A. Tag, M. Mayer, R. Weigel, and A. Hagelauer, "Modeling Nonlinear Behavior of RF Bulk Acoustic Wave Resonators" in IEEE International Ultrasonics Symposium (IUS), Tours, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{chauhan2016,
    abstract = {In this work, the Poly-Harmonic Distortion (PHD) model has been used to characterize the nonlinearities of Bulk Acoustic Wave (BAW) solidly mounted resonators (SMR). The new approach of using X-parameters for characterization and simulation of nonlinearities is described. The amplitude and phase of the fundamental mode and its harmonics up to third order have been measured and simulated by using the X-parameter framework. The simulation and measurement results for phase and amplitude of X-parameters describing the relations between incident and reflected harmonics of the same as well as different orders are shown. The X-parameter measurements of BAW components up to third order harmonics have been carried out with a nonlinear vector network analyzer (NVNA). These measurements under large-signal operating conditions were used to determine the nonlinear material constants responsible for the nonlinearity in BAW resonators.},
    author = {Chauhan, Vikrant and Tag, Andreas and Mayer, Markus and Weigel, Robert and Hagelauer, Amelie},
    booktitle = {IEEE International Ultrasonics Symposium (IUS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124175084},
    year = {2016},
    month = {09},
    day = {18},
    doi = {10.1109/ULTSYM.2016.7728406},
    eventdate = {2016-09-18/2016-09-21},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Modeling Nonlinear Behavior of RF Bulk Acoustic Wave Resonators},
    venue = {Tours},
    }
  • C. Söll, T. Mai, L. Shi, J. Röber, T. Ußmüller, R. Weigel, and A. Hagelauer, "Low-Power High-Gain Operational Amplifier for Analog Image Pre-Processing in Smart Sensor Systems" in 15. ITG/GMM-Fachtagung Analog 2016, Bremen, 2016, pp. 28-32. [Bibtex]
    @inproceedings{soell2016c,
    abstract = {In this work, a low-power high-gain operational amplifier is presented, which is dedicated to work in an analog image pre-processing stage in a smart sensor system. This stage is able to detect edges and shapes for instance, before the image is passed to the ADC and the digital computation stage, reducing data and precision requirement of both stages. This approach helps to save power, making smart image sensor nodes with energy harvesting reasonable. Since the precision as well as the energy consumption of the edge detection algorithm is highly depended on the amplifier used for the basic summing and multiplier blocks, the design of it plays an important role for the approach. The proposed input/output rail-to-rail operational amplifier is based on a 150 nm CMOS process, has a gain of 77 dB and a unity gain bandwidth of 45.7MHz while consuming only 77 µA statically at a supply voltage of 1.8V.},
    author = {Söll, Christopher and Mai, Timo and Shi, Lan and Röber, Jürgen and Ußmüller, Thomas and Weigel, Robert and Hagelauer, Amelie},
    booktitle = {15. ITG/GMM-Fachtagung Analog 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/122848044},
    year = {2016},
    month = {09},
    faupublication = {yes},
    isbn = {9783800742653},
    keywords = {analog pre-processing; operational amplifier; low-power; high-gain; folded-cascode; GRK-1773},
    pages = {28--32},
    peerreviewed = {Yes},
    title = {Low-Power High-Gain Operational Amplifier for Analog Image Pre-Processing in Smart Sensor Systems},
    venue = {Bremen},
    }
  • Y. Can, G. Fischer, and H. Kassim, "Orthogonalizing of DNF in TVL-Arithmetic" in 12th International Workshop on Boolean Problems (IWSBP’16), Freiberg (Sachsen), Germany, 2016. [Bibtex]
    @inproceedings{can2016g,
    abstract = {In this paper two new equations for orthogonalization of disjunctive normal form are presented in Ternary-Vector-List arithmetic. They provides the mathematical solution of orthogonalization of disjunctive normal form. These new equations are based on the method of orthogonalizing difference-building ⊖ and orthogonalizing OR-ing ∨. Furthermore, they are compared in their number of operations. Their advantages in respect of computation time and the number of terms in the orthogonalized result are also shown. The presentation
    of both equations take place in Ternary-Vector-List arithmetic.
    }, author = {Can, Yavuz and Fischer, Georg and Kassim, Hassen}, language = {English}, booktitle = {12th International Workshop on Boolean Problems (IWSBP’16)}, cris = {https://cris.fau.de/converis/publicweb/publication/208635862}, year = {2016}, month = {09}, day = {22}, eventdate = {2016-09-22/2016-09-23}, faupublication = {yes}, isbn = {9783860125403}, peerreviewed = {unknown}, title = {Orthogonalizing of DNF in TVL-Arithmetic}, type = {Konferenzschrift}, venue = {Freiberg (Sachsen), Germany}, }
  • C. Söll, L. Shi, J. Röber, M. Reichenbach, R. Weigel, and A. Hagelauer, "Low-Power Analog Smart Camera Sensor for Edge Detection" in IEEE International Conference on Image Processing (ICIP), Phoenix, USA, 2016. [DOI] [Bibtex]
    @inproceedings{soell2016,
    abstract = {This work presents an intelligent analog image sensor system for smart camera applications with the need of edge or marker detection. The system consists of a 3x3 read-out CMOS image sensor, an analog Sobel stage and additional circuitry like operational amplifiers and comparators to compute a 1bit image with the edges present in the taken photo. This information can then be further processed digitally to detect specific shapes in order to control robot routines, for example. The architecture of the proposed system is highly desirable as dedicated analog hardware has significant advantages in terms of power and speed compared to digital implementations. The overall system is simulated with the help of a 3x3 CMOS image sensor IC as well as Cadence Virtuoso for analog circuit simulation and MATLAB to convert the sequential information back to an image, and compared to other state of the art CMOS image sensors with edge detection capability. The analog Sobel circuit runs with a clock of 10MHz and consumes less than 0.79mW average power for the computation of the example image, and the whole 200x200 pixel image sensor consumes only 5.5mW at a frame rate of 75 fps.},
    author = {Söll, Christopher and Shi, Lan and Röber, Jürgen and Reichenbach, Marc and Weigel, Robert and Hagelauer, Amelie},
    booktitle = {IEEE International Conference on Image Processing (ICIP)},
    cris = {https://cris.fau.de/converis/publicweb/publication/123903164},
    year = {2016},
    month = {09},
    doi = {10.1109/ICIP.2016.7533193},
    faupublication = {yes},
    keywords = {Smart Camera; CMOS Image Sensor; Analog Processing Circuits; Analog Sobel; GRK-1773},
    peerreviewed = {Yes},
    title = {Low-Power Analog Smart Camera Sensor for Edge Detection},
    venue = {Phoenix, USA},
    }
  • R. Weigel, F. Lurz, S. Lindner, S. Mann, S. Linz, and A. Koelpin, "A Fast and Precise Six-Port-based IFM Technique for Wireless Resonant SAW Sensing" in IEEE International Ultrasonics Symposium (IUS), Tours, France, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{weigel2016a,
    author = {Weigel, Robert and Lurz, Fabian and Lindner, Stefan and Mann, Sebastian and Linz, Sarah and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE International Ultrasonics Symposium (IUS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122828684},
    year = {2016},
    month = {09},
    day = {18},
    doi = {10.1109/ULTSYM.2016.7728613},
    eventdate = {2016-09-18/2016-09-21},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {A Fast and Precise Six-Port-based IFM Technique for Wireless Resonant SAW Sensing},
    venue = {Tours, France},
    }
  • D. Werner, M. Schneider, M. Müller, E. Schwenzfeier-Hellkamp, and K. Reiter, "LED-Beleuchtung für Mensch und Tier in einem Milchviehstall unter Berücksichtigung der biologischen Wirksamkeit" in Licht 2016, 22. Gemeinschaftstagung der lichttechnischen Gesellschaften Deutschlands, der Niederlande, Österreichs und der Schweiz, Karlsruhe, 2016. [Bibtex]
    @inproceedings{werner2016,
    author = {Werner, Daniel and Schneider, Michael and Müller, Maike and Schwenzfeier-Hellkamp, Eva and Reiter, Klaus},
    booktitle = {Licht 2016, 22. Gemeinschaftstagung der lichttechnischen Gesellschaften Deutschlands, der Niederlande, Österreichs und der Schweiz},
    cris = {https://cris.fau.de/converis/publicweb/publication/203228545},
    year = {2016},
    month = {09},
    day = {25},
    eventdate = {2016-09-25/2016-09-28},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED-Beleuchtung für Mensch und Tier in einem Milchviehstall unter Berücksichtigung der biologischen Wirksamkeit},
    type = {Konferenzschrift},
    venue = {Karlsruhe},
    }
  • J. Ah Sue, R. Hasholzner, J. Brendel, M. Kleinsteuber, and J. Teich, "A Binary Time Series Model of LTE Scheduling for Machine Learning Prediction" in 1st International Workshops on Foundations and Applications of Self-Adaptive and Self-Organizing Systems (SASO 2016)Self-Organizing Systems (SASO 2016), Augsburg, Germany, 2016. [DOI] [Bibtex]
    @inproceedings{sue2016,
    author = {Ah Sue, Jonathan and Hasholzner, Ralph and Brendel, Johannes and Kleinsteuber, Martin and Teich, Jürgen},
    booktitle = {1st International Workshops on Foundations and Applications of Self-Adaptive and Self-Organizing Systems (SASO 2016)Self-Organizing Systems (SASO 2016)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106480264},
    year = {2016},
    month = {09},
    day = {12},
    doi = {10.1109/FAS-W.2016.64},
    eventdate = {2016-09-12/2016-09-16},
    eventtitle = {10th IEEE International Conference on Self-Adaptive and Self-Organizing Systems (SASO 2016)},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A Binary Time Series Model of LTE Scheduling for Machine Learning Prediction},
    venue = {Augsburg, Germany},
    }
  • Y. Can, H. Kassim, and G. Fischer, "Orthogonalization of DNF in TVL-Arithmetic" in 12th International Workshop of Boolean Problems, Freiberg, Germany, 2016, pp. 1-219. [Bibtex]
    @inproceedings{can2016,
    abstract = {In this paper two new equations for orthogonalization of disjunctive normal form are presented in Ternary-Vector-List arithmetic. They provides the mathematical solution of orthogonalization of disjunctive normal form. These new equations are based on the method of orthogonalizing difference-building and orthogonalizing OR-ing. Furthermore, they are compared in their number of operations. Their advantages in respect of computation time and the number of terms in the orthogonalized result are also shown. The presentation of both equations take place in Ternary-Vector-List arithmetic.},
    author = {Can, Yavuz and Kassim, Hassen and Fischer, Georg},
    editor = {der TU Bergakademie Freiberg, Medienzentrum},
    language = {English},
    booktitle = {12th International Workshop of Boolean Problems},
    cris = {https://cris.fau.de/converis/publicweb/publication/108095064},
    year = {2016},
    month = {09},
    day = {22},
    eventdate = {2016-09-22/2016-09-23},
    eventtitle = {12th International Workshop on Boolean Problems},
    faupublication = {yes},
    isbn = {9783860125403},
    keywords = {IC Test},
    pages = {1--219},
    peerreviewed = {Yes},
    title = {Orthogonalization of DNF in TVL-Arithmetic},
    type = {Konferenzschrift},
    url = {http://www.informatik.tu-freiberg.de/prof2/ws_bp12/index.html},
    venue = {Freiberg, Germany},
    }
  • S. N. Easwaran, S. K. Venugopal, and R. Weigel, "Current Regulator with Energy Limitation in the Unpowered State Featuring Bipolar Discharge Path" in IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM), New Brunswick, NJ, USA, 2016, pp. 82-85. [DOI] [Bibtex]
    @inproceedings{easwaran2016,
    abstract = {A new technique for limiting the surge current during short to battery in the unpowered state of low side driver is presented. This technique does not affect the main current regulation behavior in the powered state. The energy is limited to 28 micron Joules in the unpowered state and regulates the current to 3A in the powered state of the driver.},
    author = {Easwaran, Sri Navaneethakrishnan and Venugopal, Sunil Kashyap and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {IEEE Bipolar/BiCMOS Circuits and Technology Meeting (BCTM)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108134444},
    year = {2016},
    month = {09},
    day = {25},
    doi = {10.1109/BCTM.2016.7738950},
    eventdate = {2016-09-25/2016-09-27},
    faupublication = {yes},
    pages = {82--85},
    peerreviewed = {Yes},
    title = {Current Regulator with Energy Limitation in the Unpowered State Featuring Bipolar Discharge Path},
    venue = {New Brunswick, NJ, USA},
    }
  • C. Will, S. Linz, S. Mann, F. Lurz, S. Lindner, R. Weigel, and A. Koelpin, "A 24 GHz Waveguide based Radar System using an Advanced Algorithm for I/Q Offset Cancelation" in Kleinheubacher Tagung, Miltenberg, Germany, 2016. [Bibtex]
    @inproceedings{will2016a,
    author = {Will, Christoph and Linz, Sarah and Mann, Sebastian and Lurz, Fabian and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    publisher = {URSI},
    booktitle = {Kleinheubacher Tagung},
    cris = {https://cris.fau.de/converis/publicweb/publication/108121244},
    year = {2016},
    month = {09},
    day = {26},
    eventdate = {2016-09-26/2016-09-28},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {A 24 GHz Waveguide based Radar System using an Advanced Algorithm for I/Q Offset Cancelation},
    type = {Abstract zum Vortrag},
    venue = {Miltenberg, Germany},
    }
  • V. Silva Cortes, V. Chauhan, R. Weigel, G. Fischer, and A. Hagelauer, "Nonlinear BAW Filter Effects on the Performance of an LTE Receiver" in IEEE International Ultrasonics Symposium, Tours, France, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{silva2016a,
    abstract = {In this work, the impact of the intrinsic nonlinear effects of BAW filters in the demodulation performance of an LTE receiver is evaluated. The nonlinear effects that shape the generation of higher harmonics in the BAW resonator are covered in a nonlinear model implemented in Keysight ADS and validated through nonlinear measurements done on a BAW resonator for its 2nd harmonic. The nonlinear filter characteristics and its power dependence are captured in a Poly Harmonic Distortion (PHD) model and used for the simulation of the LTE receiver.},
    author = {Silva Cortes, Victor and Chauhan, Vikrant and Weigel, Robert and Fischer, Georg and Hagelauer, Amelie},
    publisher = {International Ultrasonics Symposium},
    booktitle = {IEEE International Ultrasonics Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/122837484},
    year = {2016},
    month = {09},
    day = {18},
    doi = {10.1109/ULTSYM.2016.7728397},
    eventdate = {2016-09-18/2016-09-21},
    eventtitle = {IEEE International Ultrasonics Symposium},
    faupublication = {yes},
    keywords = {RF frontend; BAW; Nonlinear modeling},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Nonlinear BAW Filter Effects on the Performance of an LTE Receiver},
    venue = {Tours, France},
    }
  • J. Kirchner, J. Nehring, G. A. Guarin Aristizabal, I. Nasr, B. Lämmle, M. Dietz, R. Weigel, D. Kissinger, and A. Hagelauer, "SiGe Integrated Broadband Wireless Sensors for Biomedical Applications" in 9th Sin-German Joint Symposium on Opto- and Microelectronic Devices and Circuits (SODC2016), Changchun, 2016, pp. 77-78. [Bibtex]
    @inproceedings{kirchner2016a,
    author = {Kirchner, Jens and Nehring, Johannes and Guarin Aristizabal, Gustavo Adolfo and Nasr, Ismail and Lämmle, Benjamin and Dietz, Marco and Weigel, Robert and Kissinger, Dietmar and Hagelauer, Amelie},
    booktitle = {9th Sin-German Joint Symposium on Opto- and Microelectronic Devices and Circuits (SODC2016)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120010484},
    year = {2016},
    month = {09},
    faupublication = {yes},
    pages = {77--78},
    peerreviewed = {unknown},
    title = {SiGe Integrated Broadband Wireless Sensors for Biomedical Applications},
    venue = {Changchun},
    }
  • G. Gottardo, G. Donati, C. Musolff, G. Fischer, and T. Felgentreff, "Hybrid Recursive Active Filters for Duplexing in RF Transmitter Front-Ends", Radio Science, vol. 51, iss. 8, pp. 1363-1376, 2016. [DOI] [Bibtex]
    @article{gottardo2016,
    abstract = {Duplex filters in modern base transceiver stations (BTS) provides the channel shape in order to perform common frequency division duplex (FDD) operation. Usually they are designed as cavity filters, which are expensive and have big dimensions. Thanks to the emerging digital technology and fast digital converters, it is possible to transfer the efforts of designing analog duplex filters into digital numeric algorithms applied to feedback structures, operating on power amplifiers in transmitters. This solution provides the shaping of the signal spectrum directly at the output of the radio frequency (RF) power amplifiers (PAs) relaxing the transmitter design especially in the duplexer and the antenna sections. The design of a digital baseband feedback applied to the analog power RF amplifiers (hybrid filter) is presented and verified by measurements. A model to describe the hybrid system is investigated and the relation between phase and resonance peaks in the resulting periodic band-pass transfer function is described. The stability condition of the system is analyzed using Nyquist criterion and defining a safe work region in order to avoid oscillation. A solution involving a number of digital feedback and forward branches is investigated defining recursive structure parameters of the hybrid filter. This last solution allows the closed loop system to show at the output of the RF amplifier a periodic band-pass with up to 500 KHz bandwidth. Moreover, the band-pass magnitude reaches up to 17 dB difference between maximum gain and attenuation.},
    author = {Gottardo, Giuseppe and Donati, Giovanni and Musolff, Christian and Fischer, Georg and Felgentreff, Tilman},
    publisher = {AGU Journal - Wiley online Journal},
    cris = {https://cris.fau.de/converis/publicweb/publication/122839904},
    year = {2016},
    month = {08},
    doi = {10.1002/2016RS005969},
    faupublication = {yes},
    issn = {0048-6604},
    journaltitle = {Radio Science},
    keywords = {active filter; feedback amplifier; base station; stability analysis; interference suppression; band-pass filters},
    number = {8},
    pages = {1363--1376},
    peerreviewed = {Yes},
    title = {Hybrid Recursive Active Filters for Duplexing in RF Transmitter Front-Ends},
    volume = {51},
    }
  • Y. Can, "Neue Boolesche Orthogonalisierende Operative Methoden und Gleichungen", 2016. [Bibtex]
    @phdthesis{can2016a,
    abstract = {Orthogonalität ist eine besondere Eigenschaft Boolescher Funktionen. Die Orthogonalisierung einer Booleschen Funktion vereinfacht die Transformation in eine andere äquivalente Form. Mit dieser Arbeit werden zwei neue allgemeingültige, logische operative Verknüpfungsmethoden die 'orthogonalisierende Differenzbildung ⊝' und das 'orthogonalisierende Verodern v ' vorgestellt. Die orthogonalisierende Differenzbildung wird zur Ermittlung einer Differenz in orthogonaler Form zweier Produktterme oder zweier Funktionen eingesetzt. Das orthogonalisierendes Verodern wird zum Verodern zweier Produktterme oder zweier orthogonaler Funktionen angewendet, welches auch Ergebnisse in orthogonaler Form darbietet. Darüber hinaus weisen die algorithmischen Implementierung beider Verknüpfungsmethoden geringere Rechenzeiten mit zunehmender Dimension im Vergleich zu den herkömmlichen bekannten Operationen auf. Auch werden die Vorteile im Hinblick auf den Speicherplatzbedarf hierbei besser genutzt, weil kein zusätzlicher Algorithmus zur Orthogonalisierung benötigt wird. Zudem werden Anwendungen der orthogonalisierenden Differenzbildung in weiteren Verfahren gezeigt, wie z.B. die Bildung der orthogonalen Negierten einer Funktion der disjunktiven Normalform. Durch die inhärente Orthogonalisierung werden weitere Verarbeitungsschritte in der TVL-Arithmetik, wie das Boolesche Differentialkalkül, erheblich vereinfacht. Ternär-Vektor-Listen werden als rechnerinterne Darstellung für binäre Funktionen verwendet und sind für die Behandlung Boolescher Probleme vorteilhafter. Daneben werden in dieser Arbeit zwei neue mathematische Boolesche Gleichungen zur Orthogonalisierung Boolescher Funktionen bzw. Ternär-Vektor-Listen disjunktiver Normalformen hergeleitet, welche jeweils auf den neuen Verknüpfungen ⊝ und v basieren. Damit wird zum ersten Mal mathematisch die Problematik der Orthogonalisierung behandelt und einfache Gleichungen zur Berechnung der orthogonalen Form vorgestellt. Zudem werden die beiden neuen Methoden in der Bestimmung von Testbelegungen für kombinatorische Schaltnetzwerke zur Verifizierung möglicher logischer Fehler in der TVL-Arithmetik eingesetzt. Ihre implementierten Algorithmen weisen zudem Vorteile bezüglich Rechenzeit und Speicherplatzbedarf auf und ermöglichen damit die Berechnung von minimierterer Menge an Testbelegungen. Im Vergleich zu den Methoden aus der Literatur reduzieren die neuen Algorithmen ORTH[⊝] und ORTH[ v ] die Rechenzeit um einen Faktor von ca. 2,5. Zusätzlich haben die beiden neuen Algorithmen ORTH[⊝] und ORTH[ v ] die Eigenschaft bessere Lösungen zu liefern, das bedeutet, orthogonale TVLen geringerer Anzahl an Termen, d.h. eine Reduzierung um etwa 50%. Damit wird eine Weiterbehandlung der ermittelten orthogonalen TVL mit geringerer Anzahl an Operationen gewährleistet, welche zum einen weitere Rechenzeiten optimiert und zum anderen die Anzahl an Terme in den nachfolgenden Verfahrensschritten niedriger ausfallen lässt. Mit dieser Verminderung wird die Reduzierung an Termen bis zur Ermittlung der Testbelegungen fortgesetzt, so dass minimierte Testsätze zur Verifizierung von kombinatorischen Schaltungen am Ende der Berechnungslinie erhalten werden können. Mit der geringeren Rechenzeit der Algorithmen und der minimal ermittelten Menge an Testsätzen wird eine Einsparung in Testzeit und die damit verbundenen Testkosten erreicht werden können. },
    author = {Can, Yavuz},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/122992584},
    year = {2016},
    month = {08},
    day = {10},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783944057699},
    peerreviewed = {automatic},
    title = {Neue Boolesche Orthogonalisierende Operative Methoden und Gleichungen},
    type = {Dissertation},
    }
  • M. Hierold, B. Cassens, S. Ripperger, F. Mayer, R. Weigel, and A. Koelpin, "Enabling encounter detection for small vertebrates - dynamically reconfigurable sensor nodes for BATS" in International Bat Research Conference, 2016. [Bibtex]
    @inproceedings{hierold2016b,
    author = {Hierold, Martin and Cassens, Björn and Ripperger, Simon and Mayer, Frieder and Weigel, Robert and Koelpin, Alexander},
    booktitle = {International Bat Research Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108116404},
    year = {2016},
    month = {08},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Enabling encounter detection for small vertebrates - dynamically reconfigurable sensor nodes for BATS},
    }
  • F. Xie, R. Weiß, and R. Weigel, "Hysteresis Compensation Method for Magnetoresistive (MR) Sensors Based on Single Polar Controlled Magnetic Field Pulses", IEEE Transactions on Industrial Electronics, vol. 64, iss. 1, pp. 7804-7809, 2016. [DOI] [Bibtex]
    @article{xie2016,
    author = {Xie, Fei and Weiß, Roland and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/108108924},
    year = {2016},
    month = {08},
    doi = {10.1109/TIE.2016.2598520},
    edition = {62},
    faupublication = {yes},
    issn = {0278-0046},
    journaltitle = {IEEE Transactions on Industrial Electronics},
    number = {1},
    pages = {7804--7809},
    peerreviewed = {Yes},
    shortjournal = {IEEE T IND ELECTRON},
    title = {Hysteresis Compensation Method for Magnetoresistive (MR) Sensors Based on Single Polar Controlled Magnetic Field Pulses},
    volume = {64},
    }
  • Y. Can, Neue Boolesche Orthogonalisierende Operative Methoden und Gleichungen, F. U. Press, Ed., FAU University Press, 2016.. [Bibtex]
    @book{can2016e,
    abstract = {Orthogonalität ist eine besondere Eigenschaft Boolescher Funktionen. Die Orthogonalisierung einer Booleschen Funktion vereinfacht die Transformation in eine andere äquivalente Form. Mit dieser Arbeit werden zwei neue allgemeingültige, logische operative Verknüpfungsmethoden die 'orthogonalisierende Differenzbildung ⊝' und das 'orthogonalisierende Verodern v ' vorgestellt. Die orthogonalisierende Differenzbildung wird zur Ermittlung einer Differenz in orthogonaler Form zweier Produktterme oder zweier Funktionen eingesetzt. Das orthogonalisierendes Verodern wird zum Verodern zweier Produktterme oder zweier orthogonaler Funktionen angewendet, welches auch Ergebnisse in orthogonaler Form darbietet. Darüber hinaus weisen die algorithmischen Implementierung beider Verknüpfungsmethoden geringere Rechenzeiten mit zunehmender Dimension im Vergleich zu den herkömmlichen bekannten Operationen auf. Auch werden die Vorteile im Hinblick auf den Speicherplatzbedarf hierbei besser genutzt, weil kein zusätzlicher Algorithmus zur Orthogonalisierung benötigt wird. Zudem werden Anwendungen der orthogonalisierenden Differenzbildung in weiteren Verfahren gezeigt, wie z.B. die Bildung der orthogonalen Negierten einer Funktion der disjunktiven Normalform. Durch die inhärente Orthogonalisierung werden weitere Verarbeitungsschritte in der TVL-Arithmetik, wie das Boolesche Differentialkalkül, erheblich vereinfacht. Ternär-Vektor-Listen werden als rechnerinterne Darstellung für binäre Funktionen verwendet und sind für die Behandlung Boolescher Probleme vorteilhafter. Daneben werden in dieser Arbeit zwei neue mathematische Boolesche Gleichungen zur Orthogonalisierung Boolescher Funktionen bzw. Ternär-Vektor-Listen disjunktiver Normalformen hergeleitet, welche jeweils auf den neuen Verknüpfungen ⊝ und v basieren. Damit wird zum ersten Mal mathematisch die Problematik der Orthogonalisierung behandelt und einfache Gleichungen zur Berechnung der orthogonalen Form vorgestellt. Zudem werden die beiden neuen Methoden in der Bestimmung von Testbelegungen für kombinatorische Schaltnetzwerke zur Verifizierung möglicher logischer Fehler in der TVL-Arithmetik eingesetzt. Ihre implementierten Algorithmen weisen zudem Vorteile bezüglich Rechenzeit und Speicherplatzbedarf auf und ermöglichen damit die Berechnung von minimierterer Menge an Testbelegungen. Im Vergleich zu den Methoden aus der Literatur reduzieren die neuen Algorithmen ORTH[⊝] und ORTH[ v ] die Rechenzeit um einen Faktor von ca. 2,5. Zusätzlich haben die beiden neuen Algorithmen ORTH[⊝] und ORTH[ v ] die Eigenschaft bessere Lösungen zu liefern, das bedeutet, orthogonale TVLen geringerer Anzahl an Termen, d.h. eine Reduzierung um etwa 50%. Damit wird eine Weiterbehandlung der ermittelten orthogonalen TVL mit geringerer Anzahl an Operationen gewährleistet, welche zum einen weitere Rechenzeiten optimiert und zum anderen die Anzahl an Terme in den nachfolgenden Verfahrensschritten niedriger ausfallen lässt. Mit dieser Verminderung wird die Reduzierung an Termen bis zur Ermittlung der Testbelegungen fortgesetzt, so dass minimierte Testsätze zur Verifizierung von kombinatorischen Schaltungen am Ende der Berechnungslinie erhalten werden können. Mit der geringeren Rechenzeit der Algorithmen und der minimal ermittelten Menge an Testsätzen wird eine Einsparung in Testzeit und die damit verbundenen Testkosten erreicht werden können. },
    author = {Can, Yavuz},
    editor = {Press, FAU University},
    language = {German},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/122855964},
    year = {2016},
    month = {08},
    day = {24},
    faupublication = {yes},
    isbn = {9783944057705},
    keywords = {Algorithmus; Boolesche Funktion; Disjunktive Normalform; Mengenlehre; Orthogonalisierung; Orthogonalität; Rechenzeit},
    peerreviewed = {unknown},
    series = {FAU Studien aus der Elektrotechnik (5)},
    title = {Neue Boolesche Orthogonalisierende Operative Methoden und Gleichungen},
    type = {undefined},
    url = {https://opus4.kobv.de/opus4-fau/frontdoor/index/index/docId/7389},
    }
  • A. Tag, V. Chauhan, C. Huck, B. Bader, D. Karolewski, M. Pitschi, R. Weigel, and A. Hagelauer, "A Method for Accurate Modeling of BAW Filters at High Power Levels", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, vol. 63, iss. 8, pp. 2207-2214, 2016. [DOI] [Bibtex]
    @article{tag2016,
    author = {Tag, Andreas and Chauhan, Vikrant and Huck, Christian and Bader, Bernhard and Karolewski, Dominik and Pitschi, Maximilian and Weigel, Robert and Hagelauer, Amelie},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/124170684},
    year = {2016},
    month = {08},
    doi = {10.1109/TUFFC.2016.2615109},
    faupublication = {yes},
    issn = {0885-3010},
    journaltitle = {IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control},
    number = {8},
    pages = {2207--2214},
    peerreviewed = {Yes},
    shortjournal = {IEEE T ULTRASON FERR},
    title = {A Method for Accurate Modeling of BAW Filters at High Power Levels},
    volume = {63},
    }
  • E. Boshkovska, A. Koelpin, D. W. Kwan Ng, N. Zlatanov, and R. Schober, "Robust Beamforming for SWIPT Systems with Non-linear Energy Harvesting Model" in IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC), Edinburgh, UK, 2016, pp. 1-5. [DOI] [Bibtex]
    @inproceedings{boshkovska2016,
    abstract = {This paper investigates resource allocation for simultaneous wireless information and power transfer (SWIPT) downlink systems based on a non-linear energy harvesting model. The resource allocation algorithm design is formulated as a non-convex optimization problem for the maximization of the total harvested power. The proposed problem formulation not only takes into account imperfect channel state information (CSI) but also guarantees the quality-of-service (QoS) of information transfer. A novel iterative algorithm is proposed to obtain the globally optimal solution of the considered non-convex optimization problem. In each iteration, a rank-constrained semidefinite program (SDP) is solved optimally by SDP relaxation. Simulation results demonstrate the significant gains in harvested power and the robustness against CSI imperfection for the proposed optimal resource allocation, compared to a baseline scheme designed for perfect CSI and the conventional linear energy harvesting model.},
    author = {Boshkovska, Elena and Koelpin, Alexander and Kwan Ng, Derrick Wing and Zlatanov, Nikola and Schober, Robert},
    booktitle = {IEEE 17th International Workshop on Signal Processing Advances in Wireless Communications (SPAWC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108116184},
    year = {2016},
    month = {07},
    day = {03},
    doi = {10.1109/SPAWC.2016.7536860},
    eventdate = {2016-07-03/2016-07-06},
    faupublication = {yes},
    keywords = {Energy Harvesting; Diode Detector},
    pages = {1--5},
    peerreviewed = {unknown},
    title = {Robust Beamforming for SWIPT Systems with Non-linear Energy Harvesting Model},
    venue = {Edinburgh, UK},
    }
  • C. Beck, H. J. Ng, R. Agethen, S. M. Pour Mousavi, H. Forstner, M. Wojnowski, K. Pressel, R. Weigel, A. Hagelauer, and D. Kissinger, "Industrial mmWave Radar Sensor in Embedded Wafer-Level BGA Packaging Technology", IEEE Sensors Journal, vol. 16, iss. 17, pp. 6566-6578, 2016. [DOI] [Bibtex]
    @article{beck2016,
    abstract = {We present highly integrated 60GHz radar transceivers for industrial sensor applications. The bistatic and monostatic transceivers are implemented in the SiGe bipolar technology and packaged using the embedded wafer-level ball grid array (eWLB) technology that allows for direct embedding of the antennas in the package redistribution layer. In this way, very compact and efficient radar frontends comprising all millimeter-wave components can be implemented in an 8 × 8mm2 package. These frontends were soldered on a standard low-cost PCB based on FR4 material. For verification of the proposed frontends, an FMCW radar system was developed and set up within this work. Theoretical considerations and simulations as well as corresponding measurements were carried out for the evaluation of the designed system. The demonstrator results of these embedded radar sensors show excellent system performance at a high integration level.},
    author = {Beck, Christopher and Ng, Herman Jalli and Agethen, Roman and Pour Mousavi, Seyed Mehran and Forstner, Hans-Peter and Wojnowski, Maciej and Pressel, Klaus and Weigel, Robert and Hagelauer, Amelie and Kissinger, Dietmar},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/123908884},
    year = {2016},
    month = {07},
    day = {07},
    doi = {10.1109/JSEN.2016.2587731},
    faupublication = {yes},
    issn = {1530-437X},
    journaltitle = {IEEE Sensors Journal},
    keywords = {SiGe RFICs; SiP modules; millimeter-wave circuits; packaging; radar systems},
    number = {17},
    pages = {6566--6578},
    peerreviewed = {Yes},
    shortjournal = {IEEE SENS J},
    title = {Industrial mmWave Radar Sensor in Embedded Wafer-Level BGA Packaging Technology},
    volume = {16},
    }
  • A. El Assaad, M. Krug, and G. Fischer, "Hochgenaue Fahrzeugeigenlokalisierung mit der Nutzung einer Uniform Zirkularen Antennenanordnung" in Positionierung und Navigation für intelligente Verkehrssysteme (POSNAV), Berlin, Germany, 2016. [Bibtex]
    @inproceedings{assaad2016b,
    author = {El Assaad, Ahmad and Krug, Markus and Fischer, Georg},
    publisher = {DGON},
    booktitle = {Positionierung und Navigation für intelligente Verkehrssysteme (POSNAV)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108103644},
    year = {2016},
    month = {07},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Hochgenaue Fahrzeugeigenlokalisierung mit der Nutzung einer Uniform Zirkularen Antennenanordnung},
    type = {Konferenzschrift},
    venue = {Berlin, Germany},
    }
  • M. Trautmann, B. Sanftl, F. Pflaum, R. Weigel, and A. Koelpin, "Coupling Filter Design for Data Transmission in an Inductive Power Transfer Systems" in Integration of Sustainable Energy Conference, Nuremberg, Germany, 2016. [Bibtex]
    @inproceedings{trautmann2016a,
    author = {Trautmann, Martin and Sanftl, Benedikt and Pflaum, Felix and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Integration of Sustainable Energy Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/110047784},
    year = {2016},
    month = {07},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Coupling Filter Design for Data Transmission in an Inductive Power Transfer Systems},
    venue = {Nuremberg, Germany},
    }
  • B. Sanftl, F. Pflaum, M. Trautmann, R. Weigel, and A. Koelpin, "Digital Transceiver Design for Data Communication in Inductive Power Transfer Systems" in Integration of Sustainable Energy Conference, Nuremberg, Germany, 2016. [Bibtex]
    @inproceedings{sanftl2016b,
    author = {Sanftl, Benedikt and Pflaum, Felix and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Integration of Sustainable Energy Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108122124},
    year = {2016},
    month = {07},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Digital Transceiver Design for Data Communication in Inductive Power Transfer Systems},
    venue = {Nuremberg, Germany},
    }
  • A. Elmaghraby, "Transmitter Leakage Cancellation in Cellular Handset Receivers", 2016. [Bibtex]
    @phdthesis{elmaghraby2016,
    author = {Elmaghraby, Ahmed},
    institution = {FAU Erlangen-Nürnberg},
    language = {English},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/120820964},
    year = {2016},
    month = {07},
    day = {18},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843927161},
    peerreviewed = {automatic},
    title = {Transmitter Leakage Cancellation in Cellular Handset Receivers},
    type = {Dissertation},
    }
  • L. Shi, D. Hadlich, C. Söll, T. Ußmüller, and R. Weigel, "A Tone Mapping Algorithm Suited for Analog-Signal Real-Time Image Processing" in 12th International Conference on PhD Research in Microelectronics and Electronics (PRIME), Lisbon, Portugal, 2016. [DOI] [Bibtex]
    @inproceedings{shi2016,
    abstract = {This work presents a Tone Mapping Operator (TMO) which adjusts the High Dynamic Range (HDR) of image sensor data to the limited dynamic range of conventional displays with analog signal processing. It is based on Photographic Tone Reproduction (PTR) and suitable for analog circuit design in a CMOS image sensor in order to reduce the hardware cost and operation time for real-time image processing. For this reason, the characteristic advantage and calculation limitation of analog technology are considered in the TMO algorithm proposal. Furthermore, the appropriate modelling is built and simulated in Verilog-A. The function of the algorithm is feasible for analog processing. The frequency of the analog TMO is upper 52MHz while it consumes 55mW. The simulation results of test images are compared with the digital global TMO and the proposed analog TMO provides a reasonable similar dynamic range compression.},
    author = {Shi, Lan and Hadlich, David and Söll, Christopher and Ußmüller, Thomas and Weigel, Robert},
    booktitle = {12th International Conference on PhD Research in Microelectronics and Electronics (PRIME)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122827584},
    year = {2016},
    month = {06},
    doi = {10.1109/PRIME.2016.7519457},
    faupublication = {yes},
    keywords = {Image Processing; Tone Mapping; CMOS Image Sensor; Analog Circuit; GRK 1773},
    peerreviewed = {Yes},
    title = {A Tone Mapping Algorithm Suited for Analog-Signal Real-Time Image Processing},
    venue = {Lisbon, Portugal},
    }
  • J. Brendel, "Aufbau und Analyse eines verteilten Sensornetzes zur Erhebung einer Spektrumsauslastungskarte für kognitive Funksysteme“", 2016. [Bibtex]
    @phdthesis{brendel2016,
    author = {Brendel, Johannes},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/123768304},
    year = {2016},
    month = {06},
    day = {30},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843926645},
    peerreviewed = {automatic},
    title = {Aufbau und Analyse eines verteilten Sensornetzes zur Erhebung einer Spektrumsauslastungskarte für kognitive Funksysteme“},
    type = {Dissertation},
    }
  • F. Xie, R. Weiß, and R. Weigel, "Simple Mathematical Operation-Based Calibration Method for Giant Magnetoresistive Current Sensor Applying B-Spline Modeling", IEEE Sensors Journal, vol. 16, iss. 12, pp. 4733-4739, 2016. [DOI] [Bibtex]
    @article{xie2016b,
    abstract = {Nowadays, giant magnetoresistance (GMR)-based sensor technology is widely used in numerous industrial applications. However, an inexpensive and efficient method for compensating the nonlinear output of GMR spin valve sensors is still under the industrial prospect, which limits the application of the GMR sensors. By applying the B-Spline modeling, excellent results can be achieved; nevertheless, the sensor has to be calibrated in the whole temperature range. In this paper, a simple mathematical operation-based calibration method for GMR spin valve-type current sensors applying B-Spline modeling is introduced. Instead to measure dozens of temperatures and per temperature several hundreds of points, this method allows a calibration for each further sensor applying B-Spline modeling with only two temperatures and per temperature only 15 points. In comparison with the original calibration measurement over temperature for B-Spline modeling, the new calibration with minimized efforts shows outstanding measurement accuracy of ±0.6% at a nominal current of 50 A in a temperature range from -20 °C to 80 °C.},
    author = {Xie, Fei and Weiß, Roland and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/108151604},
    year = {2016},
    month = {06},
    day = {15},
    doi = {10.1109/JSEN.2016.2558468},
    faupublication = {yes},
    issn = {1530-437X},
    journaltitle = {IEEE Sensors Journal},
    number = {12},
    pages = {4733--4739},
    peerreviewed = {Yes},
    shortjournal = {IEEE SENS J},
    title = {Simple Mathematical Operation-Based Calibration Method for Giant Magnetoresistive Current Sensor Applying B-Spline Modeling},
    volume = {16},
    }
  • M. Dietz, C. Schmidt, F. Trenz, J. Nehring, A. Hagelauer, R. Weigel, and D. Kissinger, "Dehydratations-Erkennung im Alltag durch integrierte nicht-invasive Sensorik" in Medizin Innovativ - MedTech Summit 2016, Nürnberg, 2016. [Bibtex]
    @inproceedings{dietz2016,
    abstract = {Veränderungen im menschlichen Wasserhaushalt führen zur Verminderung der Leistungsfähigkeit im Alltag bis hin zu lebensbedrohlichen Situationen. Insbesondere hier ist eine Überwachung des menschlichen Wasserhaushaltes wichtig. Ein neuer Ansatz schafft die Möglichkeit, Nutzern auch im Alltag die aktive Überwachung ihres Hydratationszustandes zu ermöglichen. Das Verfahren beruht auf Sensorik, die als Stimulus eine elektromagnetische Welle verwendet. Aus der vom Gewebe reflektierten Welle können Rückschlüsse auf die Wasserkonzentration gezogen werden. So wird ein alltagstaugliches und hochintegriertes Detektionssystem möglich, welches vom Nutzer permanent getragen werden kann und die Analyse des Wasserhaushaltes erlaubt.},
    author = {Dietz, Marco and Schmidt, Christian and Trenz, Florian and Nehring, Johannes and Hagelauer, Amelie and Weigel, Robert and Kissinger, Dietmar},
    booktitle = {Medizin Innovativ - MedTech Summit 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/108120584},
    year = {2016},
    month = {06},
    faupublication = {yes},
    keywords = {Dehydratation; nicht-invasive Sensorik; Gesundheitsförderung; integrierte Diagnostik},
    peerreviewed = {No},
    title = {Dehydratations-Erkennung im Alltag durch integrierte nicht-invasive Sensorik},
    venue = {Nürnberg},
    }
  • T. Girg, C. Beck, M. Dietz, A. Hagelauer, D. Kissinger, and R. Weigel, "A 180 GHz Frequency Multiplier in a 130 nm SiGe BiCMOS Technology" in 2016 IEEE 14th International NEWCAS Conference, Vancouver, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{girg2016,
    abstract = {An integrated analog frequency multiplier for a novel high data rate communication system has been developed to multiply a 18 GHz input signal by ten to generate a 180 GHz output signal. With a first step the 18 GHz input signal is fed into a times five edge combiner, which generates an intermediate frequency of 90 GHz. Therefore five different phases with a delta of 72 degree are needed, that are provided by an active allpass filter chain. In a second step the 90 GHz intermediate frequency is given into a double-balanced Gilbert cell mixer. Here, frequency doubling is achieved by feeding the same signal into the LO and RF port of the mixer. Hence, the overall output frequency of 180 GHz results in 180 GHz with a simulated output power of -7 dBm. All simulations are done post-layout. The chip is implemented in a 130 nm BiCMOS technology with a chip area of 0.9 mm x 1 mm.},
    author = {Girg, Thomas and Beck, Christopher and Dietz, Marco and Hagelauer, Amelie and Kissinger, Dietmar and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {2016 IEEE 14th International NEWCAS Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108113324},
    year = {2016},
    month = {06},
    day = {26},
    doi = {10.1109/NEWCAS.2016.7604745},
    eventdate = {2016-06-26/2016-06-29},
    eventtitle = {2016 IEEE 14th International NEWCAS Conference},
    faupublication = {yes},
    keywords = {SiGe BiCMOS; high data rate communication; 180 GHz; simultaneous phase and amplitude regenerative sampling; transmitter; frequency multiplier},
    pages = {1--4},
    peerreviewed = {No},
    title = {A 180 GHz Frequency Multiplier in a 130 nm SiGe BiCMOS Technology},
    type = {Konferenzschrift},
    venue = {Vancouver},
    }
  • T. Heyn, J. Morgade, S. Petersen, K. Pfaffinger, E. Lang, M. Hertlein, and G. Fischer, "Integration of Broadcast and Broadband in LTE/5G (IMB5) - Experimental Results From the eMBMS Testbeds" in European Conference on Networks and Communications 2016, Athen, Greece, 2016, pp. 1-6. [DOI] [Bibtex]
    @inproceedings{heyn2016,
    abstract = {In this paper, results of the project "Integration of Broadcast and Broadband in LTE/5G" (IMB5) project are described. The IMB5 project explores the LTE-broadcast mode eMBMS within two detailed SFN field trial networks in Erlangen and Munich, Germany and identifies potential improvements of the current broadcasting feature within LTE towards future releases of 4G and 5G. On the User Equipment (UE) side, terminals from Qualcomm and Samsung, based on commercial chipsets have been used mainly for application layer tests. For detailed physical layer tests, two different LTE software-defined-radio platforms based on OpenAirInterface framework and from National Instruments have been set-up to support detailed field experiments with the existing and future extended eMBMS beyond the state-of-the-art in LTE release 12. On the application layer, it is shown in the project, that using LTE eMBMS, a flexible service mix of unicast mobile broadband and broadcast linear TV can be delivered. For country wide deployment of eMBMS single-frequency networks, physical layer waveform modifications like an increased cyclic prefix compared to current LTE standard are recommended.},
    author = {Heyn, Thomas and Morgade, Javier and Petersen, Swen and Pfaffinger, Kerstin and Lang, Ekkehard and Hertlein, Markus and Fischer, Georg},
    publisher = {IEEE},
    booktitle = {European Conference on Networks and Communications 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/122835284},
    year = {2016},
    month = {06},
    day = {27},
    doi = {10.1109/EUCNC.2016.7561055},
    eventdate = {2016-06-27/2016-06-30},
    eventtitle = {European Conference on Networks and Communications EuCNC},
    faupublication = {yes},
    isbn = {9781509028931},
    keywords = {eMBMS; MBSFN; LTE-Broadcast 5G-Broadcast; Test facilities; Testbed; Field Trials; SDR platform},
    pages = {1--6},
    peerreviewed = {Yes},
    title = {Integration of Broadcast and Broadband in LTE/5G (IMB5) - Experimental Results From the eMBMS Testbeds},
    type = {Konferenzschrift},
    venue = {Athen, Greece},
    }
  • A. Tobola, H. Leutheuser, B. Schmitz, C. Hofmann, M. Struck, C. Weigand, B. Eskofier, and G. Fischer, "Battery Runtime Optimization Toolbox for Wearable Biomedical Sensors" in 13th International Conference on Wearable and Implantable Body Sensor Networks BSN, San Fransisco, CA, USA, 2016, pp. 199-204. [DOI] [Bibtex]
    @inproceedings{tobola2016,
    abstract = {Battery runtime is a critical concern for practical usage of wearable biomedical sensor systems. A long runtime requires an interdisciplinary low-power knowledge and appropriate design tools. We addressed this issue designing a toolbox in three parts: 1) Modular evaluation kit for development of wearable ultralow- power biomedical sensors; (2) Miniaturized, wearable, and code compatible sensor system with the same properties as the development kit; (3) Web-based battery runtime calculator for our sensor systems. The purpose of the development kit is optimization of the power consumption. Once optimization is finished, the same embedded software can be transferred to the miniaturized body worn sensor. The web-based application supports development quantifying the effects of use case and design decisions on battery runtime. A sensor developer can select sensor modules, configure sensor parameters, enter use case specific requirements, and select a battery to predict the battery runtime for a specific application. Our concept adds value to development of ultra-low-power biomedical wearable sensors. The concept is effective for professional work and educational purposes.},
    author = {Tobola, Andreas and Leutheuser, Heike and Schmitz, Björn and Hofmann, Christian and Struck, Matthias and Weigand, Christian and Eskofier, Björn and Fischer, Georg},
    language = {English},
    publisher = {IEEE},
    booktitle = {13th International Conference on Wearable and Implantable Body Sensor Networks BSN},
    cris = {https://cris.fau.de/converis/publicweb/publication/108128284},
    year = {2016},
    month = {06},
    day = {14},
    doi = {10.1109/BSN.2016.7516259},
    eventdate = {2016-06-14/2016-06-17},
    eventtitle = {13th International Conference on Wearable and Implantable Body Sensor Networks BSN},
    faupublication = {yes},
    isbn = {9781509030873},
    keywords = {Batteries,Electrocardiography,Runtime,Power demand,Computational modeling,Temperature sensors,Biological system modeling},
    pages = {199--204},
    peerreviewed = {Yes},
    title = {Battery Runtime Optimization Toolbox for Wearable Biomedical Sensors},
    url = {http://ieeexplore.ieee.org/document/7516259/},
    venue = {San Fransisco, CA, USA},
    }
  • F. Steinhäußer, A. Talai, A. Koelpin, R. Weigel, A. Bittner, and U. Schmid, "Permittivity Reduction and Surface Modification by Porosification of LTCC", Ceramics International, vol. 42, iss. 7, pp. 8925-8931, 2016. [DOI] [Bibtex]
    @article{steinhaeusser2016a,
    abstract = {The wet-chemical porosification of low temperature co-fired ceramics is investigated with respect to the resulting permittivity reduction and surface modification. Therefore, four commercially available tapes were treated and characterized by measuring the detuning of a resonator as well as by chromatic white light and scanning electron microscopy analyses. The results show a technically relevant permittivity reduction of about 15 to 18% measured at a frequency of 44 GHz. Thereby, the vertical distribution of the air, embedded by the porosification is of high influence. The achievable reduction in permittivity strongly counteracts the surface quality, which is necessary for applying high quality metallization lines.},
    author = {Steinhäußer, Frank and Talai, Armin and Koelpin, Alexander and Weigel, Robert and Bittner, Achim and Schmid, Ulrich},
    publisher = {Elsevier},
    cris = {https://cris.fau.de/converis/publicweb/publication/122834404},
    year = {2016},
    month = {05},
    doi = {10.1016/J.CERAMINT.2016.02.149},
    faupublication = {yes},
    issn = {0272-8842},
    journaltitle = {Ceramics International},
    keywords = {LTCC; porosification},
    number = {7},
    pages = {8925--8931},
    peerreviewed = {Yes},
    shortjournal = {CERAM INT},
    title = {Permittivity Reduction and Surface Modification by Porosification of LTCC},
    volume = {42},
    }
  • V. Silva Cortes, D. Podoskin, J. Stegner, M. Fischer, S. Gropp, M. Hein, M. Hoffmann, J. Müller, R. Weigel, G. Fischer, and A. Hagelauer, "Evaluation of a Multiphysical RF MEMS Oscillator Based on LTE Receiver Performance Requirements" in International Conference on Microwave, Radar and Wireless Communications (MIKON), Krakow, Poland, 2016. [DOI] [Bibtex]
    @inproceedings{silva2016,
    abstract = {A simulation methodology dealing with the complexity of multiphysical MEMS models and their evaluation according to RF specification is presented. It is focused towards the evaluation of a hybrid MEMS-CMOS RF oscillator prior its realization, based on the demodulation performance of an LTE user equipment. The proposed multiphysical simulation approach enables to meet the constraints of the receiver specification, the design rules for manufacturing and the implementation with the novel silicon-ceramic composite substrate (SiCer) based on co-simulation and a parametrized behavioral model of the MEMS resonator. Thus, allowing to successfully address the constraints at the different abstraction levels of the design and manufacturing processes.},
    author = {Silva Cortes, Victor and Podoskin, Dmitry and Stegner, Johannes and Fischer, Michael and Gropp, Sebastian and Hein, Matthias and Hoffmann, Martin and Müller, Jens and Weigel, Robert and Fischer, Georg and Hagelauer, Amelie},
    booktitle = {International Conference on Microwave, Radar and Wireless Communications (MIKON)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108115524},
    year = {2016},
    month = {05},
    day = {09},
    doi = {10.1109/MIKON.2016.7492025},
    eventdate = {2016-05-09/2016-05-11},
    eventtitle = {International Conference on Microwave, Radar and Wireless Communications (MIKON)},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Evaluation of a Multiphysical RF MEMS Oscillator Based on LTE Receiver Performance Requirements},
    venue = {Krakow, Poland},
    }
  • S. Wibbing, S. Mann, F. Lurz, S. Erhardt, S. Lindner, R. Weigel, and A. Koelpin, "A cost-efficient 61 GHz high-resolution radar sensor for industrial positioning and distance measurement" in 21st International Conference on Microwave, Radar and Wireless Communications (MIKON), Krakau, Poland, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{wibbing2016a,
    abstract = {In this paper a novel 61GHz radar sensor node for industrial positioning and distance measurement is presented. The sensor provides numerous functions enabling a broad range of signal processing technologies and is designed with regard to cost-efficient implementation only using commercial available components without limiting the area of possible applications. Beside the requirement analysis and system design, several measurements of antenna isolation and distance resolution are depicted and discussed.},
    author = {Wibbing, Sascha and Mann, Sebastian and Lurz, Fabian and Erhardt, Stefan and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {21st International Conference on Microwave, Radar and Wireless Communications (MIKON)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124224584},
    year = {2016},
    month = {05},
    day = {09},
    doi = {10.1109/MIKON.2016.7491940},
    eventdate = {2016-05-09/2016-05-11},
    faupublication = {yes},
    isbn = {9781509022144},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {A cost-efficient 61 GHz high-resolution radar sensor for industrial positioning and distance measurement},
    venue = {Krakau, Poland},
    }
  • F. Trenz, R. Weigel, and D. Kissinger, "Evaluation of a Reflection Based Dehydration Sensing Method for Wristwatch Integration" in MIKON 2016 - International Conference on Microwave, Radar and Wireless Communications, Krakow, Poland, 2016. [DOI] [Bibtex]
    @inproceedings{trenz2016,
    abstract = {This paper presents a compact dehydration measurement method, keeping in mind a system integration in a wristwatch housing. In contrast to the conventional measurement approach using two measurement antennas, the proposed measurement setup uses only one antenna and one metallic reflector. Measurements have been performed using a patch antenna immersed in a steel basin filled with a tissue-equivalent liquid. The microstrip antenna has been optimized for an application in the 2.45GHz ISM band and features a biocompatible passivation layer and a rigid aluminum housing. The tissue-equivalent liquid mimicks dielectric tissue properties over a hypotonic hydration change. The steel basin acts as a liquid retainer and as a metallic reflector for the measurement setup. Measurements with the proposed setup have shown, that a clear distinction of physiologically relevant hydration levels is possible.},
    author = {Trenz, Florian and Weigel, Robert and Kissinger, Dietmar},
    publisher = {IEEE},
    booktitle = {MIKON 2016 - International Conference on Microwave, Radar and Wireless Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/108094404},
    year = {2016},
    month = {05},
    day = {09},
    doi = {10.1109/MIKON.2016.7491935},
    eventdate = {2016-05-09/2016-05-09},
    eventtitle = {21st International Conference on Microwaves, Radar and Wireless Communications (MIKON)},
    faupublication = {yes},
    keywords = {Biomedical measurement; Microwave sensors; Biosensors; Reflectometry},
    peerreviewed = {Yes},
    title = {Evaluation of a Reflection Based Dehydration Sensing Method for Wristwatch Integration},
    type = {Konferenzschrift},
    venue = {Krakow, Poland},
    volume = {21},
    }
  • B. Sanftl, F. Pflaum, M. Trautmann, R. Weigel, and A. Koelpin, "A Novel Approach for Reliable Communications within Inductive Power Transfer Systems" in Wireless Power Transfer Conference (WPTC), Aveiro, Portugal, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{sanftl2016a,
    abstract = {This paper presents a novel approach for simultaneous inductive power transfer (IPT) and communication in one system. The communication part is using the coupled pair of coils of the IPT system as transmitting medium. The proposed architecture is usable in new and existing IPT systems with operating frequencies above 100 kHz. The challenge is to enable robust and reliable communication in the noisy environment of the power transfer. High reliability is necessary as it shall transmit sensor data error free. For example, this data link can be used for closed-loop operation of the IPT system. Through its fully digital implementation it can be quickly adapted for various other applications. It will be shown that a reliable communication system with joint power transfer and continuous data transmission over the same pair of coupling coils can be realised. Even during high power transfers it features a robust communication channel with outstanding signal to noise ratio and advantageous error vector magnitude. For proof of concept the key performance values of the proposed communication architecture are measured in a 20 W IPT system.},
    author = {Sanftl, Benedikt and Pflaum, Felix and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE MTT-S},
    booktitle = {Wireless Power Transfer Conference (WPTC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122846064},
    year = {2016},
    month = {05},
    doi = {10.1109/WPT.2016.7498830},
    eventtitle = {Wireless Power Transfer Conference 2016 (WPTC)},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {A Novel Approach for Reliable Communications within Inductive Power Transfer Systems},
    venue = {Aveiro, Portugal},
    }
  • M. Sporer, R. Weigel, and A. Koelpin, "A Planar Reconfigurable Focal Plane Array Antenna for 24 GHz" in IEEE International Microwave Symposium, San Francisco, USA, 2016, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{sporer2016,
    abstract = {This paper presents a reconfigurable focal plane array (FPA) for lens or reflector based antenna systems in the 24 GHz ISM band. The FPA consists of five equal uniformlyspaced antenna elements with switchable polarization, fabricated on a four layer substrate using conventional low-cost PCB technology. For compactness and increased bandwidth, the design is based on aperture-coupled patch radiators on top of the substrate, each embedded in a cavity in order to reduce mutual coupling. Feeding is done by means of two orthogonal H-shaped slots which are excited by microstrip transmission lines etched on the bottom layer. A discrete pin-diode single pole, double throw (SPDT) switch directly below the patch allows for polarization control and facilitates a compact element size of 10mm x 10 mm including the cavity walls. Another discrete pin-diode SP5T switch allows the selection of one of the five FPA elements at a time.},
    author = {Sporer, Michael and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE International Microwave Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/122198824},
    year = {2016},
    month = {05},
    day = {22},
    doi = {10.1109/MWSYM.2016.7540286},
    eventdate = {2016-05-22/2016-05-27},
    eventtitle = {IEEE International Microwave Symposium (IMS)},
    faupublication = {yes},
    keywords = {focal plane array; polarization control; pin-diode switches; aperture coupling},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {A Planar Reconfigurable Focal Plane Array Antenna for 24 GHz},
    type = {Konferenzschrift},
    venue = {San Francisco, USA},
    }
  • A. El Assaad, M. Krug, and G. Fischer, "Distance and Vehicle Speed Estimation Using a Uniform Circular Array Antenna" in Vehicular Technology Conference, Nanjing, China, 2016. [DOI] [Bibtex]
    @inproceedings{assaad2016,
    author = {El Assaad, Ahmad and Krug, Markus and Fischer, Georg},
    booktitle = {Vehicular Technology Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/123902724},
    year = {2016},
    month = {05},
    day = {15},
    doi = {10.1109/VTCSPRING.2016.7504196},
    eventdate = {2016-05-15/2016-05-18},
    eventtitle = {IEEE-Vehicular Technology Conference-VTC2016-Spring},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Distance and Vehicle Speed Estimation Using a Uniform Circular Array Antenna},
    venue = {Nanjing, China},
    }
  • F. Lurz, S. Lindner, S. Mann, S. Linz, R. Weigel, and A. Koelpin, "Precise and Fast Frequency Determination of Resonant SAW Sensors by a Low-Cost Six-Port Interferometer" in IEEE International Instrumentation and Measurement Technology Conference (I2MTC), Taipei, Taiwan, 2016, pp. 369-374. [DOI] [Bibtex]
    @inproceedings{lurz2016a,
    abstract = {Surface acoustic wave (SAW) resonators are used for a broad range of wireless sensing applications, some of them having high demands on the resolution as well as the measurement update rate. This paper presents a new interrogation method for precise and fast frequency determination of passive SAW resonators based on instantaneous frequency measurement (IFM) by a low-cost Six-Port interferometer. By using a delay line the frequency measurement is reduced to a phase measurement that can be instantaneously evaluated by the Six-Port structure. No complex signal processing is necessary providing high update rates and low hardware costs. A demonstrator in the 2.4 GHz frequency band shows the feasibility and the precision of the concept with measurement times of only a few microseconds.},
    author = {Lurz, Fabian and Lindner, Stefan and Mann, Sebastian and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE International Instrumentation and Measurement Technology Conference (I2MTC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108093524},
    year = {2016},
    month = {05},
    day = {23},
    doi = {10.1109/I2MTC.2016.7520390},
    eventdate = {2016-05-23/2016-05-26},
    faupublication = {yes},
    pages = {369--374},
    peerreviewed = {Yes},
    title = {Precise and Fast Frequency Determination of Resonant SAW Sensors by a Low-Cost Six-Port Interferometer},
    venue = {Taipei, Taiwan},
    }
  • B. Sanftl, C. Joffe, M. Trautmann, R. Weigel, and A. Koelpin, "Reliabe Data Link for Power Transfer Control in an Inductive Charging System for Electric Vehicles" in IEEE MTT-S International Conference on Microwaves for Intelligent Mobility, San Diego, USA, 2016. [DOI] [Bibtex]
    @inproceedings{sanftl2016,
    abstract = {This paper presents a novel data link for electric vehicles charged through inductive power transfer (IPT) systems. The data link uses the magnetically coupled coils as transmission medium. The data link is intended to transfer the instantaneous current and voltage values in the power receiving circuitry on the EV platform. One key goal is to enable robust and reliable communication for closed-loop operation of the IPT system. By careful system design the data link can be used in the noisy environment of the power transfer. For the communication architecture a fully digital approach is considered. The digital signal processing is done in an industrial controller thus, the data link can be implemented into existing systems with minimum changes. For proof of concept the communication system is connected to a 3 kW IPT system and evaluated. These key performance values for simultaneous power transfer and communication will be presented. The data link stands out with its high signal to noise ratio and error vector magnitude, consequently high reliability can be guaranteed.},
    author = {Sanftl, Benedikt and Joffe, Christopher and Trautmann, Martin and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE MTT-S},
    booktitle = {IEEE MTT-S International Conference on Microwaves for Intelligent Mobility},
    cris = {https://cris.fau.de/converis/publicweb/publication/106988684},
    year = {2016},
    month = {05},
    doi = {10.1109/ICMIM.2016.7533929},
    eventtitle = {IEEE MTT-S International Conference on Microwaves for Intelligent Mobility},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Reliabe Data Link for Power Transfer Control in an Inductive Charging System for Electric Vehicles},
    venue = {San Diego, USA},
    }
  • S. N. Easwaran, S. K. Venugopal, and R. Weigel, "Voltage clamping circuit with ±100 mV precision in high-voltage OTA", Electronics Letters, vol. 52, iss. 11, pp. 921-923, 2016. [DOI] [Bibtex]
    @article{easwaran2016b,
    abstract = {It is shown that precise output voltage clamping levels can be achieved under any operating condition by clamping the input of operational transconductance amplifier to a process insensitive reference and multiplexing the levels based on comparator decision. This circuit was implemented in a 40 V bipolar CMOS process. The fabricated circuit clamps the output voltage at 5.4 V with a precision of ±100 mV at 175°C on-chip junction temperature on the die. The input range for this circuit is between 100 mV and 25 V.},
    author = {Easwaran, Sri Navaneethakrishnan and Venugopal, Sunil Kashyap and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/120003444},
    year = {2016},
    month = {05},
    doi = {10.1049/EL.2016.0571},
    faupublication = {yes},
    issn = {0013-5194},
    journaltitle = {Electronics Letters},
    number = {11},
    pages = {921--923},
    peerreviewed = {Yes},
    shortjournal = {ELECTRON LETT},
    title = {Voltage clamping circuit with ±100 mV precision in high-voltage OTA},
    volume = {52},
    }
  • R. S. Abd El-Azeem, M. A. El-Moursy, A. M. Nassar, A. Radwan, N. T. Abou-El-Kheir, and M. S. El-Kharashi, "Direct computation for high performance interpolation filter", Microelectronics Journal, vol. 51, pp. 112-118, 2016. [DOI] [Bibtex]
    @article{el-azeem2016,
    abstract = {A Computational Filter (CF) that employs a sample calculation functional block is presented. CF significantly reduces the hardware requirements to realize an interpolation filter2. The Computational Filter is compared with advanced Finite Impulse Response (CFIR). CFIR programmable filter is implemented using a Computation Sharing Multiplication (CSHM) technique to optimize the conventional design. The proposed CF significantly reduces the implementation area as compared to CFIR. The maximum average error for wide range of interpolation factors from 8 to 256 is 2.59% for CF and 0.02% for CFIR. Xilinx Virtex5 FPGA XC5VTX240T device is used to compare the proposed design and the advanced CFIR for interpolation factor of 8, 16, 32, and 64. The Computational Filter average reduction in hardware implementation is 78.8%, 89.5%, 94.5%, and 97.1% for interpolation factor of 8, 16, 32, and 64, respectively. The maximum operating frequency for the CFIR is 1 MHz. The maximum operating frequency is 0.92 MHz, 0.57 MHz, 0.32 MHz, and 0.2 MHz for interpolation factor of 8, 16, 32, and 64, respectively.},
    author = {Abd El-Azeem, Ratshih S. and El-Moursy, Magdy A. and Nassar, Amin M. and Radwan, Ahmed and Abou-El-Kheir, Nahla T. and El-Kharashi, Moataz S.},
    publisher = {Elsevier},
    cris = {https://cris.fau.de/converis/publicweb/publication/122202344},
    year = {2016},
    month = {05},
    doi = {10.1016/J.MEJO.2016.01.006},
    faupublication = {yes},
    issn = {0026-2692},
    journaltitle = {Microelectronics Journal},
    pages = {112--118},
    peerreviewed = {Yes},
    shortjournal = {MICROELECTR J},
    title = {Direct computation for high performance interpolation filter},
    volume = {51},
    }
  • J. Röber, S. Senega, A. Bänisch, A. Hagelauer, R. Weigel, and S. Lindenmeier, "Integrated Diversity Front-End for Digital Satellite Radio Reception" in IEEE MTT International Microwave Symposium (IMS), San Francisco, USA, 2016, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{roeber2016,
    abstract = {This paper presents a diversity integrated circuit (IC) for digital satellite radio (SDARS) at 2.3GHz. The IC contains an RF circuit which enables fast adaptive processing of up to three antenna signals for maximum ratio combining in a fast fading scenario. The RF front-end of the diversity system is integrated using 150 nm CMOS technology. The phase of each of the three input paths can be adjusted in quantized steps of 45° from 0° to 360°. If the input signal of one path suffers from fading, a single path can be completely turned off for reducing the power consumption. The diversity IC is evaluated by means of laboratory measurements as well as by tests where antenna signals of real fading scenarios are processed using the presented IC. The results showa typical improvement in radio reception of more than a factor of 4 compared to a conventional reception system.},
    author = {Röber, Jürgen and Senega, Simon and Bänisch, Andreas and Hagelauer, Amelie and Weigel, Robert and Lindenmeier, Stefan},
    publisher = {IEEE},
    booktitle = {IEEE MTT International Microwave Symposium (IMS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122840124},
    year = {2016},
    month = {05},
    doi = {10.1109/MWSYM.2016.7540318},
    eventtitle = {IEEE MTT International Microwave Symposium (IMS)},
    faupublication = {yes},
    keywords = {SDARS; Diversity; LNA; Phase Shifter; Power Combiner; Integrated Circuit; RF Front-end},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Integrated Diversity Front-End for Digital Satellite Radio Reception},
    venue = {San Francisco, USA},
    }
  • A. El Assaad, M. Krug, and G. Fischer, "Distance and Vehicle Speed Estimation in OFDM Multipath Channels" in MIKON 2016 - International Conference on Microwave, Radar and Wireless Communications, Krakow, Poland, 2016. [DOI] [Bibtex]
    @inproceedings{assaad2016a,
    author = {El Assaad, Ahmad and Krug, Markus and Fischer, Georg},
    booktitle = {MIKON 2016 - International Conference on Microwave, Radar and Wireless Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/122830884},
    year = {2016},
    month = {05},
    day = {09},
    doi = {10.1109/MIKON.2016.7491943},
    eventdate = {2016-05-09/2016-05-11},
    eventtitle = {IEEE-International Conference on Microwave,Radar and Wireless Communications (MIKON)},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Distance and Vehicle Speed Estimation in OFDM Multipath Channels},
    type = {Konferenzschrift},
    venue = {Krakow, Poland},
    }
  • F. Lurz, S. Mann, S. Linz, S. Lindner, R. Weigel, and A. Koelpin, "Detektion und Auswertung: Labview-basierte Echtzeitsignalverarbeitung für die Radarsensorik", pp. 56-57, 2016. [Bibtex]
    @other{lurz2016b,
    abstract = {Hochfrequenz-Radarsensoren sind eine viel\-versprechende Alternative zu herkömmlichen Anwesenheitssensoren. Der folgende Artikel beschreibt ein 24-GHz-Low-Power-Radarsystem und dessen Labview-basierte Echtzeitsignalverarbeitung. Durch die phasenbasierte Messung wird eine hohe Sensitivität des Systems erreicht, sodass auch statische Personen anhand ihrer Vitalparameter detektiert werden können.},
    author = {Lurz, Fabian and Mann, Sebastian and Linz, Sarah and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    publisher = {Hüthig GmbH},
    booktitle = {elektronik industrie 04/2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/124154844},
    year = {2016},
    month = {04},
    faupublication = {yes},
    pages = {56--57},
    peerreviewed = {No},
    title = {Detektion und Auswertung: Labview-basierte Echtzeitsignalverarbeitung für die Radarsensorik},
    type = {Zeitungsartikel},
    url = {http://www.elektronik-industrie.de/2016/04/12/elektronik-industrie-042016/},
    }
  • Y. Can, G. Fischer, and H. Kassim, "New Boolean Equation for Orthogonalizing of Disjunctive Normal Form based on the Method of Orthogonalizing Difference-Building", Journal of Electronic Testing-Theory and Applications, vol. 32, iss. 2, pp. 197-208, 2016. [DOI] [Bibtex]
    @article{can2016f,
    abstract = {In this paper a new Boolean equation for the orthogonalization of Boolean functions respectively of Ternary-Vector-Lists of disjunctive normal form is presented. It provides the mathematical solution of orthogonalization for the first time. The new equation is based on the new method of orthogonalizing difference-building ⊖. In contrast to other methods the new method has a faster computation time. Another advantage is the smaller
    number of product terms respectively of Ternary-Vectors in the orthogonalized result in contrast to other methods. Furthermore, the new equation can be used as a part in the calculation procedure of getting suitable test patterns for combinatorial circuits for verifying feasible logical faults.
    }, author = {Can, Yavuz and Fischer, Georg and Kassim, Hassen}, cris = {https://cris.fau.de/converis/publicweb/publication/208635231}, year = {2016}, month = {04}, doi = {10.1007/S10836-016-5572-6}, faupublication = {yes}, issn = {0923-8174}, journaltitle = {Journal of Electronic Testing-Theory and Applications}, keywords = {Boolean Function · Ternary-Vector-List · Orthogonalization · Computation Time · Combinatorial Circuit · Test Pattern}, number = {2}, pages = {197--208}, peerreviewed = {Yes}, shortjournal = {J ELECTRON TEST}, title = {New Boolean Equation for Orthogonalizing of Disjunctive Normal Form based on the Method of Orthogonalizing Difference-Building}, type = {Article in Journal}, volume = {32}, }
  • A. Steg, M. Reichenbach, C. Söll, L. Shi, A. Maier, and C. Riess, "Dynamic Pixel Binning allows Spatial and Angular Resolution Tradeoffs to improve Image Quality in X-Ray C-Arm CT" in IEEE International Symposium on Biomedical Imaging (ISBI), Prague, 2016, pp. 577-580. [DOI] [Bibtex]
    @inproceedings{steg2016,
    abstract = {When designing an acquisition protocol for a C-arm CT acquisition, a tradeoff has to be made between scan time and the amount of acquired data. If the scan is increased, data of spatially and angular higher resolution can be acquired. If the scan time is fixed, one has to tradeoff spatial and angular resolution, which may either lead to oversmoothing or artifacts from angular undersampling. In this work, we investigate the viability of smart cameras for pushing the boundary for this bottleneck considerably further. The detector pixels are enhanced by processing units that are able to perform a limited amount of local operations. This allows an online, dynamical adaptation of the pixel binning, depending on whether a local neighborhood is smooth or not. We demonstrate on phantom data that this approach allows to save about 75% of the data, obtaining a reconstruction quality comparable to 1 x 1 binning at a data rate comparable to 2 x 2 pixel binning.},
    author = {Steg, Alexander and Reichenbach, Marc and Söll, Christopher and Shi, Lan and Maier, Andreas and Riess, Christian},
    booktitle = {IEEE International Symposium on Biomedical Imaging (ISBI)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122837044},
    year = {2016},
    month = {04},
    doi = {10.1109/ISBI.2016.7493334},
    faupublication = {yes},
    keywords = {Pixel Binning; X-ray detector; C-arm reconstruction; Dynamic Pixel Binning; X-ray C-arm CT},
    pages = {577--580},
    peerreviewed = {Yes},
    title = {Dynamic Pixel Binning allows Spatial and Angular Resolution Tradeoffs to improve Image Quality in X-Ray C-Arm CT},
    venue = {Prague},
    }
  • F. Xie, "Entwurf von Auswerte-, Fehlerkorrektur und Kalibrierungsverfahren für XMR-Sensoren", 2016. [Bibtex]
    @phdthesis{xie2016c,
    author = {Xie, Fei},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    publisher = {Shaker},
    cris = {https://cris.fau.de/converis/publicweb/publication/121991144},
    year = {2016},
    month = {04},
    day = {01},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783844043990},
    peerreviewed = {automatic},
    title = {Entwurf von Auswerte-, Fehlerkorrektur und Kalibrierungsverfahren für XMR-Sensoren},
    type = {Dissertation},
    }
  • A. Talai, S. Mann, R. Weigel, and A. Koelpin, "A Grounded Coplanar Waveguide Resonator Based In-Line Material Characterization Sensor" in German Microwave Conference (GeMIC), Bochum, 2016, pp. 457-460. [DOI] [Bibtex]
    @inproceedings{talai2016,
    abstract = {Microwave Materials such as Rogers RO3003 are subject to process-related fluctuations in terms of the relative permittivity. The behavior of high frequency circuits like patchantenna arrays and their distribution networks is dependent on the effective wavelength. Therefore, fluctuations of the relative permittivity will influence the resonance frequency and antenna beam direction. This paper presents a grounded coplanar waveguide based sensor, which can measure the relative permittivity at 77GHz, as well as at other resonance frequencies, by applying it on top of the manufactured depaneling. In addition, the sensor is robust against floating ground metallizations on inner printed circuit board layers, which are typically distributed over the entire surface below antennas.},
    author = {Talai, Armin and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {German Microwave Conference (GeMIC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/107706104},
    year = {2016},
    month = {03},
    day = {14},
    doi = {10.1109/GEMIC.2016.7461654},
    eventdate = {2016-03-14/2016-03-16},
    faupublication = {yes},
    keywords = {Antenna Array; Grounded CoplanarWaveguide; Differential Frequency; Electromagnetic Simulation; Floating Ground; Material Characterization; Relative Permittivity},
    pages = {457--460},
    peerreviewed = {Yes},
    title = {A Grounded Coplanar Waveguide Resonator Based In-Line Material Characterization Sensor},
    venue = {Bochum},
    }
  • S. Fuchs and R. Weigel, "Advanced receiver testing in a high volume environment using pogo cross-talk a case study" in German Microwave Conference, Bochum, 2016, pp. 57-60. [DOI] [Bibtex]
    @inproceedings{fuchs2016,
    abstract = {More and more frequency bands as well as receiver ports are integrated in a single silicon device. This is caused by the rapid development of cellular technologies towards highly integrated multimode transceivers capable of worldwide interoperability in multiple frequency bands. For ensuring highest quality standards in customer delivery, accurate testing and characterization of all these ports is essential. However, the high volume testing becomes increasingly more time consuming due to the number of ports and the respective tester interface PCB (printed circuit board) design. This paper demonstrates a feasible way to increase throughput by higher multisite efficiency with sharing one internal RF-source by using pogo cross-talk.},
    author = {Fuchs, Stephan and Weigel, Robert},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/123907784},
    year = {2016},
    month = {03},
    day = {14},
    doi = {10.1109/GEMIC.2016.7461555},
    eventdate = {2016-03-14/2016-03-16},
    faupublication = {yes},
    pages = {57--60},
    peerreviewed = {Yes},
    title = {Advanced receiver testing in a high volume environment using pogo cross-talk a case study},
    venue = {Bochum},
    }
  • C. Hsieh, J. Röber, A. Bänisch, A. Hagelauer, T. Ußmüller, and R. Weigel, "A low power CMOS transmitter with Class-E power amplifiers for positioning application in multi-band" in GeMiC 2016, German Microwave Conference 2016, Bochum, Germany, 2016, pp. 433-436. [DOI] [Bibtex]
    @inproceedings{hsieh2016,
    abstract = {In this paper, a transmitter for outdoor positioning application such as animal tracking is introduced. Class-E power amplifiers are exploited in the transmitter system in order to increase the energy efficiency for the demand of long operation duration of the system. Along with the need of power saving, a circuit topology is proposed to realize the modulation based on Binary Offset Carrier (BOC) technique at two different bands to achieve higher positioning accuracy and better utilization of the spectrum by transmitting data simultaneously. The operating frequencies of the system are 868 MHz and 2.4 GHz, and the circuit is designed in 150nm CMOS technology. The power efficiency of the class-E power amplifier is greater than 50 % over 2.4-2.8 GHz while the measured output power is greater than 10 dBm from 1.3 to 2.8 GHz.},
    author = {Hsieh, Chia-Yu and Röber, Jürgen and Bänisch, Andreas and Hagelauer, Amelie and Ußmüller, Thomas and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {GeMiC 2016, German Microwave Conference 2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/108093084},
    year = {2016},
    month = {03},
    doi = {10.1109/GEMIC.2016.7461648},
    eventtitle = {GeMiC 2016, German Microwave Conference 2016},
    faupublication = {yes},
    keywords = {positioning; class-E},
    pages = {433--436},
    peerreviewed = {Yes},
    title = {A low power CMOS transmitter with Class-E power amplifiers for positioning application in multi-band},
    venue = {Bochum, Germany},
    }
  • T. Fersch, A. Buhmann, A. Koelpin, and R. Weigel, "The Influence of Rain on Small Aperture LiDAR Sensors" in German Microwave Conference, Bochum, 2016, pp. 84-87. [DOI] [Bibtex]
    @inproceedings{fersch2016,
    abstract = {The influence of rain on pulsed LiDAR systems with a miniaturized aperture and small laser beam cross sections was investigated based on two situations deemed critical. First, discrete rain drops appearing very close to the laser aperture could lead to a complete deflection of the laser beam out of the original direction when drop and beam overlap. Our semi-probabilistic, semi-analytical model however indicates that the rate of deflected scan events is negligible. Second, the emitter surface could be, to a greater or lesser extent, covered with drops of various size, degrading the performance. We found an optimum ratio between drop diameter and laser beam diameter, favoring larger laser beams. Also this effect however is, in total, not critical.},
    author = {Fersch, Thomas and Buhmann, Alexander and Koelpin, Alexander and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/123100384},
    year = {2016},
    month = {03},
    day = {14},
    doi = {10.1109/GEMIC.2016.7461562},
    eventdate = {2016-03-14/2016-03-16},
    faupublication = {yes},
    isbn = {9783981266870},
    keywords = {LiDAR},
    pages = {84--87},
    peerreviewed = {Yes},
    title = {The Influence of Rain on Small Aperture LiDAR Sensors},
    venue = {Bochum},
    }
  • M. A. Sedaghat, R. Müller, G. Fischer, and A. Ali, "Discrete Load-Modulated Single-RF MIMO Transmitters" in 20th Int’l ITG Workshop on Smart Antennas, München, Germany, 2016. [Bibtex]
    @inproceedings{sedaghat2016,
    author = {Sedaghat, Mohammad Ali and Müller, Ralf and Fischer, Georg and Ali, Arslan},
    language = {English},
    booktitle = {20th Int’l ITG Workshop on Smart Antennas},
    cris = {https://cris.fau.de/converis/publicweb/publication/118444524},
    year = {2016},
    month = {03},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Discrete Load-Modulated Single-RF MIMO Transmitters},
    type = {Konferenzschrift},
    venue = {München, Germany},
    }
  • S. Rieß, "Architecture Optimization and Implementation of a Radio Receiver wiht a Multistage Spectrum Sensing Techniques as Part of a Low-Cost Spectrum Sensing Grid", 2016. [Bibtex]
    @phdthesis{riess2016,
    author = {Rieß, Steffen},
    institution = {FAU Erlangen-Nürnberg},
    language = {English},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/123455684},
    year = {2016},
    month = {03},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843925457},
    peerreviewed = {automatic},
    title = {Architecture Optimization and Implementation of a Radio Receiver wiht a Multistage Spectrum Sensing Techniques as Part of a Low-Cost Spectrum Sensing Grid},
    type = {Dissertation},
    }
  • S. Wibbing, F. Lurz, S. Mann, S. Lindner, S. Linz, R. Weigel, and A. Koelpin, "Determining Linearity of Wideband FMCW-Systems Based on Low-Cost Six-Port Technology" in German Microwave Conference (GeMiC), Bochum, 2016, pp. 389-392. [DOI] [Bibtex]
    @inproceedings{wibbing2016,
    abstract = {This paper describes a new method for high accuracy determination of instantaneous frequency and linearity of frequency modulated continuous wave systems. The presented setup reduces the frequency measurement to a phase measurement based on Six-Port interferometer with a delay line. To extend the range of possible input frequencies and power levels, a calibration method and the appropriate correction algorithm is introduced. Evaluation of linearity and frequency of the input signal is obtained without the use of computationally intensive Fourier transform which allows the signal processing based on low-cost micro-controllers.},
    author = {Wibbing, Sascha and Lurz, Fabian and Mann, Sebastian and Lindner, Stefan and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108112224},
    year = {2016},
    month = {03},
    day = {14},
    doi = {10.1109/GEMIC.2016.7461637},
    eventdate = {2016-03-14/2016-03-16},
    faupublication = {yes},
    pages = {389--392},
    peerreviewed = {Yes},
    title = {Determining Linearity of Wideband FMCW-Systems Based on Low-Cost Six-Port Technology},
    venue = {Bochum},
    }
  • F. Steinhäußer, A. Talai, G. Sandulache, R. Weigel, A. Koelpin, W. Hansal, A. Bittner, and U. Schmid, "Pulse Plated Silver Metallization on Porosified Low Temperature Co-fired Ceramics for High Frequency Applications", Microelectronics Reliability, vol. 60, pp. 93-100, 2016. [DOI] [Bibtex]
    @article{steinhaeusser2016,
    abstract = {Advanced high frequency systems such as needed in modern radar applications, require high conductive metallizations as well as substrates with areas of variable permittivity. This paper presents the combination of the selective porosification technology of low temperature co-fired ceramics and electro pulse plated silver microstrip lines. By means of selective plating methods, line widths of 20 µm can be manufactured featuring low resistivity values down to 2.33 µΩ·cm, without detectable pore penetration. The substrate permittivity is measured facilitating a combined method of ring resonator detuning and 3D field simulations resulting in a reduction of 6.5% with a shift from approx. 7.52 to 7.03 at 66 GHz due to the porosification. As often outlined in literature the major challenge in using silver as a conductor lies in its high tendency of agglomeration and microstructural transformation especially in oxygen containing atmosphere even at low temperatures. Therefore, the effect of different temperature loads up to 500°C on the dc film resistivity are measured using the VAN DER PAUW technique and compared to scanning electron microscope analyses.},
    author = {Steinhäußer, Frank and Talai, Armin and Sandulache, Gabriela and Weigel, Robert and Koelpin, Alexander and Hansal, Wolfgang and Bittner, Achim and Schmid, Ulrich},
    publisher = {Elsevier},
    cris = {https://cris.fau.de/converis/publicweb/publication/108091324},
    year = {2016},
    month = {03},
    doi = {10.1016/J.MICROREL.2016.02.010},
    faupublication = {yes},
    issn = {0026-2714},
    journaltitle = {Microelectronics Reliability},
    keywords = {LTCC; porosification},
    pages = {93--100},
    peerreviewed = {Yes},
    shortjournal = {MICROELECTRON RELIAB},
    title = {Pulse Plated Silver Metallization on Porosified Low Temperature Co-fired Ceramics for High Frequency Applications},
    volume = {60},
    }
  • D. Krause, W. John, and R. Weigel, "Investigations on the Magnetic Field Coupling of Automotive High Voltage Systems to Determine Relevant Parameters for an EMR-optimized Designing", Advances in Radio Science : Kleinheubacher Berichte, vol. 13, pp. 269-278, 2016. [DOI] [Bibtex]
    @article{krause2014,
    author = {Krause, David and John, Werner and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/122841884},
    year = {2016},
    month = {03},
    day = {21},
    doi = {10.5194/ARS-13-269-2016},
    faupublication = {yes},
    issn = {1684-9965},
    journaltitle = {Advances in Radio Science : Kleinheubacher Berichte},
    pages = {269--278},
    peerreviewed = {Yes},
    title = {Investigations on the Magnetic Field Coupling of Automotive High Voltage Systems to Determine Relevant Parameters for an EMR-optimized Designing},
    volume = {13},
    }
  • Y. Can, H. Kassim, and G. Fischer, "New Boolean Equation for Orthogonalizing of Disjunctive Normal Form based on the Method of Orthogonalizing Difference-Building", Journal of Electronic Testing-Theory and Applications, vol. Vol. 32, iss. Issue 2, pp. 197-208, 2016. [DOI] [Bibtex]
    @article{can2016b,
    abstract = {In this paper a new Boolean equation for the orthogonalization of Boolean functions respectively of Ternary-Vector-Lists of disjunctive normal form is presented. It provides the mathematical solution of orthogonalization for the first time. The new equation is based on the new method of orthogonalizing difference-building ⊖. In contrast to other methods the new method has a faster computation time. Another advantage is the smaller number of product terms respectively of Ternary-Vectors in the orthogonalized result in contrast to other methods. Furthermore, the new equation can be used as a part in the calculation procedure of getting suitable test patterns for combinatorial circuits for verifying feasible logical faults.},
    author = {Can, Yavuz and Kassim, Hassen and Fischer, Georg},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/108457624},
    year = {2016},
    month = {03},
    day = {17},
    doi = {10.1007/S10836-016-5572-6},
    faupublication = {yes},
    issn = {0923-8174},
    journaltitle = {Journal of Electronic Testing-Theory and Applications},
    keywords = {Orthogonalizing Boolean Forms},
    number = {Issue 2},
    pages = {197--208},
    peerreviewed = {Yes},
    shortjournal = {J ELECTRON TEST},
    title = {New Boolean Equation for Orthogonalizing of Disjunctive Normal Form based on the Method of Orthogonalizing Difference-Building},
    type = {Article in Journal},
    volume = {Vol. 32},
    }
  • A. Meyer, J. Kirchner, and G. Fischer, "EKG-Messung mittels passiver kapazitiv gekoppelter Elektroden" in Analogworkshop 2016, Hannover, 2016. [Bibtex]
    @inproceedings{meyer2016,
    abstract = {Hintergrund

    Kapazitiv gekoppelte Elektroden zur EKG-Erfassung erschließen seit einigen Jahren Anwendungsgebiete jenseits der klinischen Routine: Während dort zumeist galvanisch gekoppelte, insbesondere Nasselektroden zum Einsatz kommen, die direkten Hautkontakt erfordern und wegen des austrocknenden Elektrolytgels nur für kurze Messungen geeignet sind, erlauben kapazitive Elektroden Langzeit-Messungen und die Integration in Alltagsgegenstände wie Kleidung, Autositze oder Betten.

    Stand der Technik ist dabei eine aktive Ausführung, bei der direkt an der Elektrode das anliegende Signal verstärkt wird, bevor es in einem Differenzverstärker mit dem Signal einer zweiten Elektrode zusammengeführt wird. Allerdings führen in diesem Ansatz die Toleranzen der verwendeten aktiven Bauelemente zu asymmetrischem Übertragungsverhalten in den beiden Kanälen, sodass die Gleichtaktunterdrückung wesentlich beeinträchtigt wird.
    Um diesem Problem entgegenzuwirken und den Gleichlauf der Pfade von Elektrode bis Differenzverstärker zu verbessern, wurde ein EKG-System mit rein passiven Kanälen entwickelt.

    Methoden

    Für die Aufnahme der Messsignale wurden möglichst großflächige Elektroden mit jeweils 20cm2 Fläche verwendet. Da zwischen Elektrode und Differenzverstärker auf eine Verstärkung der Einzelsignale verzichtet wurde, ist auf dieser Strecke eine möglichst verlust- und störungsfreie Übertragung entscheidend. Hierfür wurde die jeweilige Leitung mit einer Ummantelung versehen, die auf demselben Potential wie die zugehörige Elektrode gehalten wird. Hierdurch werden äußere Störeinflüsse aktiv abgeschirmt, gleichzeitig werden durch den Bootstrap effektiv keine durch die Elektroden und die Signalleitungen hervorgerufenen parasitischen Eingangskapazitäten wirksam.

    Ferner wurde ein Differenzverstärker mit möglichst geringer Eingangskapazität und hoher CMRR gewählt. Um die Gleichtaktunterdrückung im Gesamtsystem zusätzlich zu erhöhen, wurde eine Bezugspotentialsteuerung eingesetzt. Hierbei wird die Common-Mode-Störung über eine dritte Elektrode invertiert und verstärkt in den Körper des Patienten zurückgespeist (sog. "driven right leg circuit").

    Schließlich wurde eine Baseline-Drift, hervorgerufen durch Ladungsansammlungen an den Elektroden, mittels langsamem Feedback korrigiert, indem Gleichspannungsanteile am Ausgang des Instrumentenverstärkers als Referenzspannung an diesen zurückgegeben werden.

    Ergebnisse

    Mit den beschriebenen Maßnahmen wurde ein stabiles EKG-Signal erhalten, das in der ersten Verstärkerstufe um einen Faktor 100, in der zweiten um einen Faktor 2000 verstärkt werden konnte.

    Exemplarische Messungen durch ein Baumwoll-T-Shirt hindurch zeigten in jedem Herzzyklus des aufgenommenen EKGs deutlich den QRS-Komplex, der sich zur Detektion von Arrhythmien eignet, sowie die T-Welle. Die P-Welle war vereinzelt zu erkennen. Vergleichbare Ergebnisse wurden bei Messungen durch Papier und Plastikfolie hindurch erzielt.

    Fazit

    Das entwickelte System ermöglicht die kontaktlose Messung der elektrischen Herzaktivität durch verschiedene Materialien hindurch und erzielte dabei rausch- und interferenzärmere Ergebnisse als vergleichbare Systeme mit kapazitiv gekoppelten Elektroden in aktiver Ausführung. Das System eignet sich damit für diverse Anwendungsbereiche, beispielsweise für den Einsatz auf einem Rückenpflaster oder zur Integration in Kleidung.}, author = {Meyer, Andreas and Kirchner, Jens and Fischer, Georg}, publisher = {Leibniz Universität Hannover}, booktitle = {Analogworkshop 2016}, cris = {https://cris.fau.de/converis/publicweb/publication/123114244}, year = {2016}, month = {03}, day = {03}, eventdate = {2016-03-03/2016-03-04}, eventtitle = {Analogworkshop 2016}, faupublication = {yes}, keywords = {ECG; capacitatively coupled electrode}, peerreviewed = {No}, title = {EKG-Messung mittels passiver kapazitiv gekoppelter Elektroden}, type = {Abstract zum Vortrag}, venue = {Hannover}, }

  • S. Mann, S. Linz, S. Erhardt, S. Lindner, F. Lurz, H. Maune, R. Weigel, and A. Koelpin, "Differential Measuring Dual Six-Port Concept and Antenna Design for an Inline Foil Thickness Sensor" in German Microwave Conference (GeMiC), Bochum, Germany, 2016, pp. 165-168. [DOI] [Bibtex]
    @inproceedings{mann2016a,
    abstract = {Sensor elements play an important role in future manufacturing plants. This paper presents a solution for an foil thickness sensor for running production lines. Based on the elaborated Six-Port concept, a differential measuring concept is proposed and discussed. Furthermore, an end-fire antenna design for the addressed application is demonstrated and far field measurement results are shown and compared to simulation. Finally, interference effects between two antennas are experimentally investigated as a function of the relative rotation between two oppositely placed devices.},
    author = {Mann, Sebastian and Linz, Sarah and Erhardt, Stefan and Lindner, Stefan and Lurz, Fabian and Maune, Holger and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108104084},
    year = {2016},
    month = {03},
    day = {14},
    doi = {10.1109/GEMIC.2016.7461581},
    eventdate = {2016-03-14/2016-03-16},
    faupublication = {yes},
    pages = {165--168},
    peerreviewed = {Yes},
    title = {Differential Measuring Dual Six-Port Concept and Antenna Design for an Inline Foil Thickness Sensor},
    venue = {Bochum, Germany},
    }
  • S. Ripperger, D. Josic, M. Hierold, A. Koelpin, R. Weigel, M. Hartmann, R. Page, and F. Mayer, "Automated proximity sensing in small vertebrates: design of miniaturized sensor nodes and first field tests in bats" in Ecology and Evolution, 2016. [Bibtex]
    @inproceedings{ripperger2016,
    author = {Ripperger, Simon and Josic, Darija and Hierold, Martin and Koelpin, Alexander and Weigel, Robert and Hartmann, Markus and Page, Rachel and Mayer, Frieder},
    booktitle = {Ecology and Evolution},
    cris = {https://cris.fau.de/converis/publicweb/publication/115464184},
    year = {2016},
    month = {02},
    faupublication = {no},
    peerreviewed = {Yes},
    title = {Automated proximity sensing in small vertebrates: design of miniaturized sensor nodes and first field tests in bats},
    type = {Konferenzschrift},
    }
  • L. Classen, A. Kappes, T. Karg, A. Kretzschmann, A. Koelpin, S. Lindner, and J. Röber, "The mDOM - A multi-PMT optical module for IceCube-Gen2" in DPG-Verhandlungen, Hamburg, 2016. [Bibtex]
    @inproceedings{classen2016,
    abstract = {Following the discovery of an astrophysical neutrino flux by IceCube in 2013, planning is under way for the next generation neutrino telescope at the South Pole, IceCube-Gen2, which will significantly enhance and expand IceCube’s sensitivity both towards high neutrino energies as well as in the low-energy regime. In the scope of these efforts, a novel multi-PMT optical sensor is being developed which, following the KM3NeT design, consists of an array of several small PMTs inside a transparent pressure vessel. This design provides some significant advantages compared to the conventional single-PMT module design, such as an increased effective area, homogeneous coverage of the full solid angle, and intrinsic angular sensitivity. The talk presents an overview of the project and its current status, featuring hardware development, testing, and simulation efforts.},
    author = {Classen, Lew and Kappes, Alexander and Karg, Timo and Kretzschmann, Axel and Koelpin, Alexander and Lindner, Stefan and Röber, Jürgen},
    booktitle = {DPG-Verhandlungen},
    cris = {https://cris.fau.de/converis/publicweb/publication/106319884},
    year = {2016},
    month = {02},
    day = {29},
    eventdate = {2016-02-29/2016-03-04},
    eventtitle = {DPG-Verhandlungen},
    faupublication = {yes},
    issn = {0420-0195},
    peerreviewed = {unknown},
    title = {The mDOM - A multi-PMT optical module for IceCube-Gen2},
    url = {https://inis.iaea.org/search/search.aspx?orig_q=RN:48030386},
    venue = {Hamburg},
    }
  • J. Nehring, M. Dietz, K. Aufinger, G. Fischer, R. Weigel, and D. Kissinger, "A 4–32-GHz Chipset for a Highly Integrated Heterodyne Two-Port Vector Network Analyzer", IEEE Transactions on Microwave Theory and Techniques, vol. 64, iss. 3, pp. 892-905, 2016. [DOI] [Bibtex]
    @article{nehring2016b,
    author = {Nehring, Johannes and Dietz, Marco and Aufinger, Klaus and Fischer, Georg and Weigel, Robert and Kissinger, Dietmar},
    cris = {https://cris.fau.de/converis/publicweb/publication/119633184},
    year = {2016},
    month = {02},
    doi = {10.1109/TMTT.2016.2520483},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {3},
    pages = {892--905},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {A 4–32-GHz Chipset for a Highly Integrated Heterodyne Two-Port Vector Network Analyzer},
    volume = {64},
    }
  • C. Will, K. Shi, F. Lurz, R. Weigel, and A. Koelpin, "Instantaneous Heartbeat Detection using a Cross-Correlation based Template Matching for Continuous Wave Radar Systems" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Austin, TX, USA, 2016, pp. 31-34. [DOI] [Bibtex]
    @inproceedings{will2016,
    abstract = {Instantaneous heartbeat detection is necessary for an optimal patient monitoring in healthcare centers. Whereas electrocardiogram (ECG) and ballistocardiogram (BCG), for instance, are established methods for real time monitoring nowadays, contact-free systems are appreciated. Herewith, a 24 GHz continuous wave (CW) radar system with an intelligent signal processing is presented. Common heartbeat detection algorithms use the fast Fourier transform (FFT), and therefore require an adequate observation time window and rather detect an averaged heart rate. The proposed algorithm in contrast accomplishes the detection of single heart beats directly in the time domain with an insignificant delay. The core of that algorithm is a template matching using the cross-correlation method. In this paper, after describing the radar system with the novel signal processing, the presented system is compared to a commercial ECG product.},
    author = {Will, Christoph and Shi, Kilin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108087804},
    year = {2016},
    month = {01},
    day = {24},
    doi = {10.1109/WISNET.2016.7444314},
    eventdate = {2016-01-24/2016-01-27},
    faupublication = {yes},
    keywords = {Radar interferometry; Biomedical signal processing; Template matching},
    pages = {31--34},
    peerreviewed = {Yes},
    title = {Instantaneous Heartbeat Detection using a Cross-Correlation based Template Matching for Continuous Wave Radar Systems},
    type = {Konferenzschrift},
    venue = {Austin, TX, USA},
    }
  • F. Dressler, S. Ripperger, M. Hierold, T. Nowak, C. Eibel, B. Cassens, F. Mayer, K. Meyer-Wegener, and A. Koelpin, "From Radio Telemetry to Ultra-Low Power Sensor Networks - Tracking Bats in the Wild", IEEE Communications Magazine, vol. 54, iss. 1, pp. 129-135, 2016. [DOI] [Bibtex]
    @article{dressler2016,
    abstract = {Sensor networks have successfully been used for wildlife monitoring and tracking of different species. When it comes to small animals such as smaller birds, mammals, or even insects, the current approach is to use extremely lightweight RF tags located using radio telemetry. A new quantum leap in technology is needed to overcome this limitation and enable new ways to observe larger numbers of small animals. In an interdisciplinary team, we are working on the different aspects of such a new technology. In particular, we report on our findings on a sensor-network-based tracking solution for bats. Our system is based on integrated localization and wireless communication protocols for ultra-low-power systems. This requires coding techniques for improved reliability as well as ranging solutions for tracking hunting bats. We address the technological and methodical problems related to system design, software support, and protocol design. First field experiments have been conducted that showcase the capabilities of our system.},
    author = {Dressler, Falko and Ripperger, Simon and Hierold, Martin and Nowak, Thorsten and Eibel, Christopher and Cassens, Björn and Mayer, Frieder and Meyer-Wegener, Klaus and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE Institute of Electrical and Electronics},
    cris = {https://cris.fau.de/converis/publicweb/publication/110523424},
    year = {2016},
    month = {01},
    doi = {10.1109/MCOM.2016.7378438},
    faupublication = {yes},
    issn = {0163-6804},
    journaltitle = {IEEE Communications Magazine},
    number = {1},
    pages = {129--135},
    peerreviewed = {Yes},
    shortjournal = {IEEE COMMUN MAG},
    title = {From Radio Telemetry to Ultra-Low Power Sensor Networks - Tracking Bats in the Wild},
    type = {Article in Journal},
    url = {http://www.ccs-labs.org/bib/dressler2016bats/dressler2016bats.pdf},
    volume = {54},
    }
  • A. Farabegoli, "Digital Predistortion and Crest Factor Reduction Architectures for Mobile Radio Handset Transmitters", 2016. [Bibtex]
    @phdthesis{farabegoli2016,
    author = {Farabegoli, Alessio},
    institution = {FAU Erlangen-Nürnberg},
    language = {English},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/122020184},
    year = {2016},
    month = {01},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843924252},
    peerreviewed = {automatic},
    title = {Digital Predistortion and Crest Factor Reduction Architectures for Mobile Radio Handset Transmitters},
    type = {Dissertation},
    }
  • A. El Assaad, M. Krug, and G. Fischer, "Vehicle Self-Localization for Advanced Driver Assistance Systems" in WPNC’2016 IEEE 13th Workshop on Positioning, Navigation and Communications, 2016. [DOI] [Bibtex]
    @inproceedings{assaad2016d,
    author = {El Assaad, Ahmad and Krug, Markus and Fischer, Georg},
    booktitle = {WPNC’2016 IEEE 13th Workshop on Positioning, Navigation and Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/106991104},
    year = {2016},
    month = {01},
    doi = {10.1109/WPNC.2016.7822854},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Vehicle Self-Localization for Advanced Driver Assistance Systems},
    type = {Konferenzschrift},
    }
  • D. Fey, M. Reichenbach, C. Söll, and R. Weigel, "Evaluating Signed-digit Arithmetic Circuits using Multi-level storing Memristors" in HIPEAC Workshop on Memristor Technology, Design, Automation and Computing, Prague, 2016, pp. 1-6. [Bibtex]
    @inproceedings{fey2016,
    abstract = {Signed-digit (SD) arithmetic, e.g. ternary computer arithmetic circuits process trits instead of bits. It is long known that trits, which are using for each digit not only 0 and 1but in addition either 2 or -1, can carry out an addition in a constant number of steps independent of the used word length of the operands. However, corresponding SD arithmetic circuits have not been used in current processors so far due to the missing of fast, dense and CMOS compatible memory cells that can store reliably multiple levels. Memristors offer these features making necessary a re-evaluation of different SD number representations and their corresponding arithmetic circuits realized in CMOS technology. In addition appropriate analogue-to-digital (A/D) and digital-to-analogue (D/A) interfaces between digital CMOS circuits and multi-level memristors are ne-cessary and have to be considered in this investigation. The paper evaluates different SD number represen-tations using digits with three or five levels for the adder. It is concluded that an SD addition using trits and three elementary processing steps is currently the best solution for memristors. This solution is currently implemented in a first hardware demonstrator using commercially available memristor devices, discretely realised A/D and D/A converters which link the memristor registers to an FPGA implementing the SD arithmetic.},
    author = {Fey, Dietmar and Reichenbach, Marc and Söll, Christopher and Weigel, Robert},
    booktitle = {HIPEAC Workshop on Memristor Technology, Design, Automation and Computing},
    cris = {https://cris.fau.de/converis/publicweb/publication/120004984},
    year = {2016},
    month = {01},
    faupublication = {yes},
    keywords = {Memristor; GRK-1773},
    pages = {1--6},
    peerreviewed = {Yes},
    title = {Evaluating Signed-digit Arithmetic Circuits using Multi-level storing Memristors},
    venue = {Prague},
    }
  • G. Vinci and A. Koelpin, "Progress of Six-Port technology for industrial radar applications" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Austin, TX, USA, 2016, pp. 48-51. [DOI] [Bibtex]
    @inproceedings{vinci2016,
    abstract = {Six-Port receivers are well-known in the microwave test and measurement community since decades. The basic network topology has been implemented for simple reflectometer applications as well as complex network analysis. In the last decade however, a new application area for this receiver technology has been explored: Radar. Year after year new applications have been covered by radar systems taking benefit of the complex additive mixing technique of Six-Port receivers. Especially, innovative radar measurement solutions for industrial applications have been addressed by developing new hardware based on this receiver topology. In this paper, an overview of Six-Port technology will be given focusing on industrial applications that benefit from this receiver technique, the advantages as well as the drawbacks of this technology.},
    author = {Vinci, Gabor and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124170024},
    year = {2016},
    month = {01},
    day = {24},
    doi = {10.1109/WISNET.2016.7444319},
    eventdate = {2016-01-24/2016-01-27},
    faupublication = {yes},
    keywords = {Six-Port; Radar},
    pages = {48--51},
    peerreviewed = {Yes},
    title = {Progress of Six-Port technology for industrial radar applications},
    venue = {Austin, TX, USA},
    }
  • M. Hartmann, T. Nowak, O. Pfadenhauer, J. Thielecke, and A. Heuberger, "A Grid-based Filter for Tracking Bats Applying Field Strength Measurements" in 12th Annual Conference on Wireless On-demand Network Systems and Services (WONS), Cortina d'Ampezzo, Italy, 2016, pp. 184-191. [Bibtex]
    @inproceedings{hartmann2016,
    abstract = {Nowadays, many applications demand precise localization information. One of those applications is wildlife monitoring, e.g. tracking of bats. Wireless sensor networks featuring field strength measurements are a promising approach to track tiny and lightweight animals. In this paper a robust grid-based filter for the localization of bats based on field strength measurements is proposed. Therefore, fundamentals of field strength-based direction finding and optimal filtering are presented. A gridbased filtering approach to the problem of field strength-based position estimation of bats is derived and evaluated by Monte Carlo simulations.},
    author = {Hartmann, Markus and Nowak, Thorsten and Pfadenhauer, Oliver and Thielecke, Jörn and Heuberger, Albert},
    booktitle = {12th Annual Conference on Wireless On-demand Network Systems and Services (WONS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120430244},
    year = {2016},
    month = {01},
    day = {20},
    eventdate = {2016-01-20/2016-03-22},
    faupublication = {yes},
    keywords = {Gain; Direction-of-arrival estimation; Antennas; Antenna measurements; Estimation; Trajectory; Bayes methods},
    pages = {184--191},
    peerreviewed = {Yes},
    title = {A Grid-based Filter for Tracking Bats Applying Field Strength Measurements},
    type = {Konferenzschrift},
    url = {http://like.eei.uni-erlangen.de/bib/Hartmann2016_Grid.pdf},
    venue = {Cortina d'Ampezzo, Italy},
    }
  • K. Staszek, S. Linz, F. Lurz, S. Mann, R. Weigel, and A. Koelpin, "Improved Calibration Procedure for Six-Port Based Precise Displacement Measurements" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Austin, TX, USA, 2016, pp. 60-63. [DOI] [Bibtex]
    @inproceedings{staszek2016,
    abstract = {In this paper an improved calibration procedure for six-port based displacement measurement radar is proposed. The entire system characterizati on is done only using several measurements of the target at kn own positions and no additional calibration standards a re required. The proposed calibration has been experim entally verified for a six-port based displacement measurem ent radar operating at 24 GHz. The performed measurements within the target position range 0 – 18.75 mm prove a significant to the other reported algorithms.},
    author = {Staszek, Kamil and Linz, Sarah and Lurz, Fabian and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108111784},
    year = {2016},
    month = {01},
    day = {24},
    doi = {10.1109/WISNET.2016.7444322},
    eventdate = {2016-01-24/2016-01-27},
    faupublication = {yes},
    keywords = {six-port; reflectometer; radar; calibration; technique; displacement measurements},
    pages = {60--63},
    peerreviewed = {Yes},
    title = {Improved Calibration Procedure for Six-Port Based Precise Displacement Measurements},
    venue = {Austin, TX, USA},
    }
  • S. Mann, F. Lurz, S. Linz, S. Lindner, C. Will, S. Wibbing, R. Weigel, and A. Koelpin, "Substrate Integrated Waveguide Fed Antenna for 61 GHz Ultra-Short-Range Interferometric Radar Systems" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Austin, TX, USA, 2016, pp. 64-66. [DOI] [Bibtex]
    @inproceedings{mann2016,
    abstract = {Radar sensors play a key role in today’s indus- trial automation. Being an alternative to frequency modulated continuous wave radar, Six-Port based radar sensors recently attracted the interest of the community as well as of the industry. This paper presents a 61 GHz Six-Port radar sensor for ultra-short range applications and a dedicated substrate integrate waveguide fed tapered slot antenna design. Due to an optimized design, the antenna allows for measurements in the direct near-zone of 0 mm to 10 mm without ambiguity effects. Making use of a spiral fitting operation, the presented measurement results show an absolute distance error of less than 100 μm.},
    author = {Mann, Sebastian and Lurz, Fabian and Linz, Sarah and Lindner, Stefan and Will, Christoph and Wibbing, Sascha and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108672564},
    year = {2016},
    month = {01},
    day = {24},
    doi = {10.1109/WISNET.2016.7444323},
    eventdate = {2016-01-24/2016-01-27},
    faupublication = {yes},
    keywords = {Interferometer; Six-Port; RADAR; phase measurement; nearfield sensor; millimeter-wave},
    number = {66},
    pages = {64--66},
    peerreviewed = {Yes},
    title = {Substrate Integrated Waveguide Fed Antenna for 61 GHz Ultra-Short-Range Interferometric Radar Systems},
    type = {Konferenzschrift},
    venue = {Austin, TX, USA},
    volume = {64},
    }
  • J. Kilian, D. Werner, M. Schneider, and E. Schwenzfeier-Hellkamp, "Conceptual design of an automatized light control in a cowshed" in IEEE Power and Energy Student Summit 2016 (PESS 2016), RWTH Aachen, 2016. [Bibtex]
    @inproceedings{kilian2016,
    author = {Kilian, Jens and Werner, Daniel and Schneider, Michael and Schwenzfeier-Hellkamp, Eva},
    booktitle = {IEEE Power and Energy Student Summit 2016 (PESS 2016)},
    cris = {https://cris.fau.de/converis/publicweb/publication/203229180},
    year = {2016},
    month = {01},
    day = {19},
    eventdate = {2016-01-19/2016-01-20},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Conceptual design of an automatized light control in a cowshed},
    type = {Konferenzschrift},
    venue = {RWTH Aachen},
    }
  • F. Lurz, C. Dorn, S. Lindner, S. Linz, S. Mann, R. Weigel, and A. Koelpin, "Digital Phase Correction for Multiplexed ADCs in Low-Cost Six-Port Interferometers" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Austin, TX, USA, 2016, pp. 56-59. [DOI] [Bibtex]
    @inproceedings{lurz2016,
    author = {Lurz, Fabian and Dorn, Christian and Lindner, Stefan and Linz, Sarah and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124169144},
    year = {2016},
    month = {01},
    day = {24},
    doi = {10.1109/WISNET.2016.7444321},
    eventdate = {2016-01-24/2016-01-27},
    faupublication = {yes},
    pages = {56--59},
    peerreviewed = {Yes},
    title = {Digital Phase Correction for Multiplexed ADCs in Low-Cost Six-Port Interferometers},
    venue = {Austin, TX, USA},
    }
  • J. Kilian, D. Werner, M. Schneider, and E. Schwenzfeier-Hellkamp, "Conceptual design of an automatized light control in a cowshed" in IEEE Power and Energy Student Summit 2016 (PESS 2016), RWTH Aachen, 2016. [Bibtex]
    @inproceedings{kilian2016a,
    author = {Kilian, Jens and Werner, Daniel and Schneider, Michael and Schwenzfeier-Hellkamp, Eva},
    language = {English},
    booktitle = {IEEE Power and Energy Student Summit 2016 (PESS 2016)},
    cris = {https://cris.fau.de/converis/publicweb/publication/203240740},
    year = {2016},
    month = {01},
    day = {19},
    eventdate = {2016-01-19/2016-01-20},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Conceptual design of an automatized light control in a cowshed},
    type = {Abstract zum Vortrag},
    venue = {RWTH Aachen},
    }
  • M. Kloc, S. Rieß, J. Brendel, S. Linz, M. Gardill, R. Weigel, and G. Fischer, "Let's Make Them Cognitive! Cognitive Radio Technology Applied to Professional Wireless Microphone Systems", IEEE Microwave Magazine, vol. 17, iss. 1, pp. 70-78, 2016. [DOI] [Bibtex]
    @article{kloc2016,
    author = {Kloc, Matej and Rieß, Steffen and Brendel, Johannes and Linz, Sarah and Gardill, Markus and Weigel, Robert and Fischer, Georg},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/108120364},
    year = {2016},
    month = {01},
    doi = {10.1109/MMM.2015.2487922},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {1},
    pages = {70--78},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {Let's Make Them Cognitive! Cognitive Radio Technology Applied to Professional Wireless Microphone Systems},
    volume = {17},
    }
  • M. Trautmann, C. Joffe, F. Pflaum, B. Sanftl, R. Weigel, T. Heckel, and A. Koelpin, "Implementation of Simultaneous Energy and Data Transfer in a Contactless Connector" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Austin, TX, USA, 2016, pp. 101-104. [DOI] [Bibtex]
    @inproceedings{trautmann2016,
    abstract = {This paper presents a contactless, near field energy and data transfer system, which uses one common pair of coils for both transmission purposes. As exemplary target application a contactless connector for harsh environment is shown, but the concept can be adapted to several other applications. The challenge is to transmit the data simultaneously to a high energy signal. The system concept, simulation as well as measurement results of a hardware demonstrator will be presented in this paper. It will be shown that a robust data transmission system can be realized featuring superior SNR and nearly noise free operation even with a simultaneous energy transfer of several kilowatt.},
    author = {Trautmann, Martin and Joffe, Christopher and Pflaum, Felix and Sanftl, Benedikt and Weigel, Robert and Heckel, Thomas and Koelpin, Alexander},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108107824},
    year = {2016},
    month = {01},
    doi = {10.1109/WISNET.2016.7444333},
    faupublication = {yes},
    keywords = {data transfer; inductive power transmission; plugs; power filters; wireless communication},
    pages = {101--104},
    peerreviewed = {Yes},
    title = {Implementation of Simultaneous Energy and Data Transfer in a Contactless Connector},
    venue = {Austin, TX, USA},
    }
  • M. Kloc, N. Franchi, M. Gardill, and R. Weigel, "Low Latency Evaluation of an Adaptive Industrial Wireless Communications System for ISM Bands" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), 2016, pp. 7-10. [DOI] [Bibtex]
    @inproceedings{kloc2016a,
    abstract = {Low latency and highest transmission reliability are the key challenges for enabling time-critical industrial wireless applications, e.g. in factory automation. Both are significantly determined by the rough and dynamic environmental conditions as well as regulatory limitation of spectrum access in unlicensed frequency bands, especially in the 2.4 GHz industrial, scientific and medical (ISM) band. In order to get these influences under control, a novel concept for an adaptive and low latency (≤ 1 ms) industrial wireless communications (IWC) system that adopts a robust IEEE 802.11p physical layer (PHY) is proposed and evaluated. Based on representative coexistence measurements in a real environment, the results of extensive simulations and analysis are shown in order to evaluate achievable latencies.},
    author = {Kloc, Matej and Franchi, Norman and Gardill, Markus and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108106284},
    year = {2016},
    month = {01},
    doi = {10.1109/WISNET.2016.7444307},
    eventtitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    faupublication = {yes},
    pages = {7--10},
    peerreviewed = {Yes},
    title = {Low Latency Evaluation of an Adaptive Industrial Wireless Communications System for ISM Bands},
    }
  • N. Franchi, "Adaptive Signal- und Kanalemulation mit softwaredefinierter Funktechnik für IEEE-802.11p-basierte Car-2Car-Kommunikation", 2016. [Bibtex]
    @phdthesis{franchi2016,
    author = {Franchi, Norman},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/118704344},
    year = {2016},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Adaptive Signal- und Kanalemulation mit softwaredefinierter Funktechnik für IEEE-802.11p-basierte Car-2Car-Kommunikation},
    type = {Dissertation},
    }
  • H. Bischl, C. Fuchs, M. Geissler, D. Giggenbach, M. Hein, A. Jacob, R. Jakoby, I. Kallfass, D. Kissinger, S. Martin, J. Müller, H. Petry, R. Wansch, R. Weigel, I. Wolff, and V. Ziegler, "Die Zukunft der Satellitenkommunikation", pp. 1-56, 2016. [Bibtex]
    @other{bischl2016,
    author = {Bischl, Hermann and Fuchs, Christian and Geissler, Matthias and Giggenbach, Dirk and Hein, Matthias and Jacob, Arne and Jakoby, Rolf and Kallfass, Ingmar and Kissinger, Dietmar and Martin, Siegbert and Müller, Jens and Petry, Hans-Peter and Wansch, Rainer and Weigel, Robert and Wolff, Ingo and Ziegler, Volker},
    booktitle = {Weissbuch der ITG im VDE},
    cris = {https://cris.fau.de/converis/publicweb/publication/108117284},
    year = {2016},
    faupublication = {no},
    pages = {1--56},
    peerreviewed = {No},
    title = {Die Zukunft der Satellitenkommunikation},
    type = {Working Paper},
    }
  • R. Löhr, F. Ohnhäuser, J. Röber, and R. Weigel, "Switch Bootstrapping in a 1.5 Bit Pipeline Stage" in Analog2016, Bremen, 2016, pp. 49-52. [Bibtex]
    @inproceedings{loehr2016,
    abstract = {The targeted 16 bit pipeline converter has an adjustable sampling frequency from 100MHz to 200MHz. In this paper the switches for the input and the reference voltage sampling are analyzed. Therefore, a novel switch bootstrapping technique is presented, which guarantees a worst case input voltage settling accuracy of LSB 2 at settling times between 2 ns to 5 ns. The non-linearity caused by the input switches is simulated and typically amounts to -115 dB. In addition a possible solution for external reference voltage settling is introduced.},
    author = {Löhr, Robert and Ohnhäuser, Frank and Röber, Jürgen and Weigel, Robert},
    booktitle = {Analog2016},
    cris = {https://cris.fau.de/converis/publicweb/publication/122835064},
    year = {2016},
    eventtitle = {Analog2016},
    faupublication = {yes},
    keywords = {1.5 bit,switch bootstrapping,MDAC,charge injection,external reference,non-linearity},
    pages = {49--52},
    peerreviewed = {Yes},
    title = {Switch Bootstrapping in a 1.5 Bit Pipeline Stage},
    venue = {Bremen},
    }
  • D. Werner, M. Schneider, E. Schwenzfeier-Hellkamp, M. Müller, K. Reiter, and A. Pelzer, "Beleuchtung und Beleuchtungstechnik im Rinderstall", 2016. [Bibtex]
    @other{werner2016f,
    author = {Werner, Daniel and Schneider, Michael and Schwenzfeier-Hellkamp, Eva and Müller, Maike and Reiter, Klaus and Pelzer, Andreas},
    editor = {e.V. Fachzentrum Landwirtschaft, DLG},
    publisher = {DLG e.V. Fachzentrum Landwirtschaft},
    cris = {https://cris.fau.de/converis/publicweb/publication/203237468},
    year = {2016},
    edition = {1},
    faupublication = {no},
    peerreviewed = {automatic},
    title = {Beleuchtung und Beleuchtungstechnik im Rinderstall},
    type = {Techreport},
    }
  • M. Rantisi, "Eine effiziente Methode für den Linearitätstest von Analog-Digital-Umsetzern", 2016. [Bibtex]
    @phdthesis{rantisi2016,
    author = {Rantisi, Mohamed},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    cris = {https://cris.fau.de/converis/publicweb/publication/124067504},
    year = {2016},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Eine effiziente Methode für den Linearitätstest von Analog-Digital-Umsetzern},
    type = {Dissertation},
    }
  • D. Werner, M. Schneider, M. Müller, K. Reiter, and E. Schwenzfeier-Hellkamp, "LEDs im Milchviehstall, worauf kommt es an?", iss. 2, 2016. [Bibtex]
    @other{werner2016e,
    author = {Werner, Daniel and Schneider, Michael and Müller, Maike and Reiter, Klaus and Schwenzfeier-Hellkamp, Eva},
    publisher = {dlz agrarmagazin},
    cris = {https://cris.fau.de/converis/publicweb/publication/203241830},
    year = {2016},
    faupublication = {no},
    number = {2},
    peerreviewed = {automatic},
    title = {LEDs im Milchviehstall, worauf kommt es an?},
    type = {Report},
    }
  • U. Schwerthöffer, "Ultraschall- und mikrowellenbasierte sensorische Erfassung geringer Stoffunterschiede in wässrigen Lösungen für die medizinische Diagnostik", 2016. [Bibtex]
    @phdthesis{schwerthoeffer2016,
    author = {Schwerthöffer, Udo},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    cris = {https://cris.fau.de/converis/publicweb/publication/122548844},
    year = {2016},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Ultraschall- und mikrowellenbasierte sensorische Erfassung geringer Stoffunterschiede in wässrigen Lösungen für die medizinische Diagnostik},
    type = {Dissertation},
    }
  • I. Janke, "Development of Methods and Concepts for the Deployment of Electronics in the Containment of Nuclear Power Plants", 2016. [Bibtex]
    @phdthesis{janke2016,
    author = {Janke, Iryna},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/121037664},
    year = {2016},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Development of Methods and Concepts for the Deployment of Electronics in the Containment of Nuclear Power Plants},
    type = {Dissertation},
    }
  • M. Hierold, M. Hartmann, S. Ripperger, F. Mayer, A. Heuberger, R. Weigel, and A. Koelpin, "Low-weight Wireless Sensor Node for Animal Encounter Detection and Dual-band Localization" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), 2016. [Bibtex]
    @inproceedings{hierold2016,
    author = {Hierold, Martin and Hartmann, Markus and Ripperger, Simon and Mayer, Frieder and Heuberger, Albert and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122327524},
    year = {2016},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Low-weight Wireless Sensor Node for Animal Encounter Detection and Dual-band Localization},
    type = {Konferenzschrift},
    }
  • L. Shi, C. Söll, B. Pfundt, A. Bänisch, M. Reichenbach, J. Seiler, T. Ussmueller, and R. Weigel, "A flexible mixed-signal image processing pipeline using 3D chip stacks", Journal of Real-Time Image Processing, vol. 14, iss. 3, pp. 517-534, 2016. [DOI] [Bibtex]
    @article{shi2016b,
    abstract = {This work presents a highly flexible mixed-signal CMOS image sensor suitable for smart camera applications. These systems need to fit different constraints regarding power consumption, speed and quality, and the optimal compromise may differ depending on the application. Moreover, the best implementation of a desired image processing task may be in the analog or the digital domain, or even a combined computation. Different aspects starting from the image sensor and signal acquisition up to the pre-processing in analog and digital domain are investigated in this paper to optimize not just one part of the system, but the whole system altogether. Moreover, it is shown that analog processing algorithms can improve signal quality, processing speed and latency while being able to save power, which is important for real-time systems. In order to be able to carry out spatial operations, the state-of-the-art sensor is modified to be able to read out multiple pixels at the same time. This allows analog spatial filter operations which consume significantly less power. As an example, an averaging filter is described which needs less than 5.3 % of the power–time product of a digital implementation for one computation. To enhance data throughput and flexibility, 3D chip stacking is proposed to partition the sensor in smaller units and enable massively parallel processing.},
    author = {Shi, Lan and Söll, Christopher and Pfundt, Benjamin and Bänisch, Andreas and Reichenbach, Marc and Seiler, Jürgen and Ussmueller, Thomas and Weigel, Robert},
    publisher = {Springer Verlag (Germany)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106120564},
    year = {2016},
    doi = {10.1007/S11554-016-0628-5},
    faupublication = {yes},
    issn = {1861-8200},
    journaltitle = {Journal of Real-Time Image Processing},
    keywords = {3D chip stacking; Analog pre-processing; Application optimized image pipeline; Partitioning; Smart camera},
    number = {3},
    pages = {517--534},
    peerreviewed = {Yes},
    shortjournal = {J REAL-TIME IMAGE PR},
    title = {A flexible mixed-signal image processing pipeline using 3D chip stacks},
    type = {Article in Journal},
    volume = {14},
    }

2015

  • S. Lutz, "MIMO-Radarsystemarchitektur und Parameterschätzung für komplexe Mehrzielszenarien", 2015. [Bibtex]
    @phdthesis{lutz2015a,
    author = {Lutz, Steffen},
    institution = {FAU Erlangen-Nürnberg},
    language = {German},
    publisher = {Cuvillier, E},
    cris = {https://cris.fau.de/converis/publicweb/publication/122641024},
    year = {2015},
    month = {12},
    day = {08},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783736991590},
    peerreviewed = {automatic},
    title = {MIMO-Radarsystemarchitektur und Parameterschätzung für komplexe Mehrzielszenarien},
    type = {Dissertation},
    }
  • F. X. Röhrl, W. Bogner, J. Jakob, and D. Hageneder, "Wideband RF Interconnects for Organic Chip Packages - Comparison of single ended and differential transitions" in European Microwave Conference (EuMC), Paris, France, 2015. [DOI] [Bibtex]
    @inproceedings{roehrl2015,
    abstract = {Embedding of semiconductor chips into organic substrates allows a cheap and high degree of miniaturization. For RF applications the connection between chip and package is as important as the connection between package and baseboard. This paper presents both single ended and differential transitions for RF packages with special reference to what should be considered when using organic printed circuit boards (PCBs). Because of the fully impedance controlled design process the presented transitions can be used from DC to 60 GHz and guarantee best signal integrity. In addition a fast and flexible measurement of the package - baseboard transition is shown by the use of a specific contact structure. Moreover it is figured out how the discontinuities of the interconnect structure of the chip package can be localized in detail using TDR measurements.},
    author = {Röhrl, Franz Xaver and Bogner, Werner and Jakob, Johannes and Hageneder, Daniel},
    booktitle = {European Microwave Conference (EuMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/118937764},
    year = {2015},
    month = {12},
    day = {03},
    doi = {10.1109/EUMC.2015.7345880},
    eventdate = {2015-09-07/2015-09-10},
    faupublication = {no},
    peerreviewed = {Yes},
    title = {Wideband RF Interconnects for Organic Chip Packages - Comparison of single ended and differential transitions},
    type = {Journal Article},
    url = {http://ieeexplore.ieee.org/document/7345880/},
    venue = {Paris, France},
    }
  • P. Oßmann, J. Fuhrmann, K. Dufrene, J. Fritzin, J. Moreira, H. Pretl, and A. Springer, "Design of a Fully Integrated Two-Stage Watt-Level Power Amplifier Using 28-nm CMOS Technology", IEEE Transactions on Microwave Theory and Techniques, pp. 188-199, 2015. [DOI] [Bibtex]
    @article{ossmann2015a,
    author = {Oßmann, Patrick and Fuhrmann, Jörg and Dufrene, Krzysztof and Fritzin, Jonas and Moreira, José and Pretl, Harald and Springer, Andreas},
    cris = {https://cris.fau.de/converis/publicweb/publication/121889504},
    year = {2015},
    month = {12},
    doi = {10.1109/TMTT.2015.2503343},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    pages = {188--199},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Design of a Fully Integrated Two-Stage Watt-Level Power Amplifier Using 28-nm CMOS Technology},
    }
  • F. Müller, S. Benesch, W. Steinbuch, T. Walter, and R. Weigel, "Mitigation of Weak Targets’ Masking due to Nonlinearities in Chirp Sequence FMCW Automotive Radar at 77 GHz" in Asia-Pacific Microwave Conference (APMC2015), Nanjing, China, 2015, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{mueller2015d,
    author = {Müller, Felix and Benesch, Sebastian and Steinbuch, W. and Walter, Thomas and Weigel, Robert},
    booktitle = {Asia-Pacific Microwave Conference (APMC2015)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120744184},
    year = {2015},
    month = {12},
    day = {06},
    doi = {10.1109/APMC.2015.7413451},
    eventdate = {2015-12-06/2015-12-09},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Mitigation of Weak Targets’ Masking due to Nonlinearities in Chirp Sequence FMCW Automotive Radar at 77 GHz},
    venue = {Nanjing, China},
    }
  • A. Cattaneo, "A Physically Based Reliability Modelling Framework for nm-CMOS RF Devices and Circuits undergoing RF Stress", 2015. [Bibtex]
    @phdthesis{cattaneo2015a,
    author = {Cattaneo, Andrea},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/123954864},
    year = {2015},
    month = {12},
    day = {10},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843923934},
    peerreviewed = {automatic},
    title = {A Physically Based Reliability Modelling Framework for nm-CMOS RF Devices and Circuits undergoing RF Stress},
    type = {Dissertation},
    }
  • F. Grimminger, "Subthreshold-Standardzellen für Ultra Low Power-Wakeup-Schaltungen in drahtlosen Sensorknoten", 2015. [Bibtex]
    @phdthesis{grimminger2015,
    author = {Grimminger, Florian},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/123413664},
    year = {2015},
    month = {12},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Subthreshold-Standardzellen für Ultra Low Power-Wakeup-Schaltungen in drahtlosen Sensorknoten},
    type = {Dissertation},
    }
  • G. Gottardo, G. Donati, C. Musolff, G. Fischer, and T. Felgentreff, "Hybrid Recursive Active Filters for Duplexing in RF Transmitter Front-Ends" in Mediterranean Microwave Symposium, Lecce, Italy, 2015, pp. 227-230. [DOI] [Bibtex]
    @inproceedings{gottardo2015a,
    abstract = {Duplex filters in modern base stations are designed as cavity filters, which are expensive and have big dimensions. Thanks to the emerging digital technology and fast digital converters, it is possible to transfer the efforts of designing analog duplex filters into digital numeric algorithms applied to feedback structures, operating on power amplifiers in transmitters. The design of a digital baseband feedback applied to the analog power RF amplifiers (hybrid filter) is presented and verified by measurements. The use of multiple digital feedback branches allows the closed loop system to show a periodic band-pass behavior at the output of the RF amplifier with a larger bandwidth up to 500 KHz. Moreover the band pass magnitude reaches up to 17 dB difference between maximum gain and attenuation.},
    author = {Gottardo, Giuseppe and Donati, Giovanni and Musolff, Christian and Fischer, Georg and Felgentreff, Tilman},
    publisher = {IEEE},
    booktitle = {Mediterranean Microwave Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/108076364},
    year = {2015},
    month = {12},
    day = {30},
    doi = {10.1109/MMS.2015.7375476},
    eventdate = {2015-11-30/2015-12-02},
    faupublication = {yes},
    keywords = {active filter; feedback amplifier; base station; stability analysis; interference suppression; band-pass filters; cavity resonators},
    pages = {227--230},
    peerreviewed = {Yes},
    title = {Hybrid Recursive Active Filters for Duplexing in RF Transmitter Front-Ends},
    venue = {Lecce, Italy},
    }
  • A. Radwan, R. Weigel, and D. Kissinger, "Broadband Circuit Techniques for Multi-Terahertz Gain-Bandwidth-Product Low-Power Applications", IEEE Transactions on Microwave Theory and Techniques, vol. 63, iss. 11, pp. 3701-3712, 2015. [DOI] [Bibtex]
    @article{gharib2015,
    abstract = {In this paper, two proposed bandwidth (BW) extension techniques are discussed and analytically analyzed. The capabilities of the proposed feedback techniques are demonstrated with two design examples of different circuitry, supported by simulation and measurement results. The first design example is a broadband low-power active balun, employing one of the presented feedback techniques. It is capable of operating with a gain of 2.2 dB and BW of more than 70 GHz. The amplitude imbalance is less than 2.4 dB, while the phase imbalance is below 7 ° up to 60 GHz and 14 ° up to 70 GHz, consuming a low-power of 29.7 mW. The second design example is a differential three-stage amplifier, incorporating the two techniques, where their combined performance achieves a gain of 54 dB and a 3-dB BW of 25 GHz, resulting in a gain-BW product (GBP) of 12.5 THz, with a power consumption of 180 mW from a 3.3-V supply. The chips are fabricated in a 0.35- µm SiGe:C bipolar technology with a ft/ fmax of 200/250 GHz.},
    author = {Radwan, Ahmed and Weigel, Robert and Kissinger, Dietmar},
    cris = {https://cris.fau.de/converis/publicweb/publication/108051944},
    year = {2015},
    month = {11},
    doi = {10.1109/TMTT.2015.2481398},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {11},
    pages = {3701--3712},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {Broadband Circuit Techniques for Multi-Terahertz Gain-Bandwidth-Product Low-Power Applications},
    volume = {63},
    }
  • C. Will, K. Shi, F. Lurz, R. Weigel, and A. Koelpin, "Intelligent Signal Processing Routine for Instantaneous Heart Rate Detection using a Six-Port Microwave Interferometer" in IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Nusa Dua, Bali, Indonesia, 2015, pp. 483-487. [DOI] [Bibtex]
    @inproceedings{will2015,
    abstract = {Instantaneous heart rate detection is one of the key parameters in medical vital parameter monitoring. In medical centers e.g., real time monitoring of the vital signs of a patient under surveillance is necessary. Nowadays, the dominant technologies are electrocardiogram (ECG) or ballistocardiogram (BCG), but the required direct contact to the person-under-surveillance is a common drawback of these sensors. In this paper, a Six-Port microwave interferometer is presented and used to detect the current heart rate of a person-under-test. An intelligent signal processing routing is proposed, that avoids the fast Fourier transform (FFT) due to the implicated longsome observation window and operates directly in the time domain instead. A commercial ECG product is used to proof the reliability of the presented signal processing routine to establish Six-Port microwave interferometers for instantaneous heart rate detection.},
    author = {Will, Christoph and Shi, Kilin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124139884},
    year = {2015},
    month = {11},
    day = {09},
    doi = {10.1109/ISPACS.2015.7432820},
    eventdate = {2015-11-09/2015-11-12},
    faupublication = {yes},
    keywords = {Six-Port; Interferometers; Biomedical signal processing; Heartbeat monitoring},
    pages = {483--487},
    peerreviewed = {Yes},
    title = {Intelligent Signal Processing Routine for Instantaneous Heart Rate Detection using a Six-Port Microwave Interferometer},
    type = {Konferenzschrift},
    venue = {Nusa Dua, Bali, Indonesia},
    }
  • C. Söll, L. Shi, A. Bänisch, T. Ußmüller, and R. Weigel, "A CMOS Image Sensor with Analog Pre-Processing Capability Suitable for Smart Camera Applications" in IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Bali, Indonesia, 2015, pp. 279-284. [DOI] [Bibtex]
    @inproceedings{soell2015b,
    abstract = {This work presents a novel CMOS sensor which is suitable for analog image processing operations and describes the benefits of analog pre-processing over digital algorithms. All needed modifications to read out a spatial NxN pixel matrix simultaneously are presented regarding pixel wiring, row decoder and column multiplexer as well as descrambling the order of the outputs. The outputs are connected via a buffer stage to the analog pre-processing circuits. As an example for such an analog computation, an averaging filter is described from design constraints to the actual implementation. Simulation results show a very low current consumption of just 55.3 µA under worst-case conditions and a computation time below 200 ns. This corresponds to a power-time product ratio of 1:18.75 compared to a digital state-of-the-art implementation.},
    author = {Söll, Christopher and Shi, Lan and Bänisch, Andreas and Ußmüller, Thomas and Weigel, Robert},
    booktitle = {IEEE International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108075704},
    year = {2015},
    month = {11},
    doi = {10.1109/ISPACS.2015.7432780},
    faupublication = {yes},
    keywords = {Smart Cameras; CMOS Image Sensors; Analog Processing Circuits; Filtering Algorithms; GRK-1773},
    pages = {279--284},
    peerreviewed = {Yes},
    title = {A CMOS Image Sensor with Analog Pre-Processing Capability Suitable for Smart Camera Applications},
    venue = {Bali, Indonesia},
    }
  • C. Schmidt, M. Dietz, F. Trenz, J. Nehring, R. Weigel, and D. Kissinger, "Miniaturisierte Dehydratations-Sensorik im Leistungssport" in Fußball 4.0 - Jahrestagung der dvs-Kommission Fußball, Erlangen, 2015. [Bibtex]
    @inproceedings{schmidt2015,
    author = {Schmidt, Christian and Dietz, Marco and Trenz, Florian and Nehring, Johannes and Weigel, Robert and Kissinger, Dietmar},
    booktitle = {Fußball 4.0 - Jahrestagung der dvs-Kommission Fußball},
    cris = {https://cris.fau.de/converis/publicweb/publication/120743084},
    year = {2015},
    month = {11},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Miniaturisierte Dehydratations-Sensorik im Leistungssport},
    venue = {Erlangen},
    }
  • K. Reiter, M. Müller, and D. Werner, "LED als Lichtquelle im Stall" in Weiterbildungskurs für Baufachleute 2015, Schweizerischen Eidgenossenschaft, Gemeindezentrum Aadorf, Agroscope Tänikon, Switzerland, 2015. [Bibtex]
    @inproceedings{reiter2015b,
    author = {Reiter, Klaus and Müller, Maike and Werner, Daniel},
    booktitle = {Weiterbildungskurs für Baufachleute 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/203242230},
    year = {2015},
    month = {11},
    day = {03},
    eventdate = {2015-11-03/2015-11-03},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED als Lichtquelle im Stall},
    type = {Abstract zum Vortrag},
    venue = {Schweizerischen Eidgenossenschaft, Gemeindezentrum Aadorf, Agroscope Tänikon, Switzerland},
    }
  • K. Reiter, M. Müller, and D. Werner, "LED als Lichtquelle im Stall" in Weiterbildungskurs für Baufachleute 2015, Schweizerischen Eidgenossenschaft, Gemeindezentrum Aadorf, Agroscope Tänikon, Switzerland, 2015. [Bibtex]
    @inproceedings{reiter2015a,
    author = {Reiter, Klaus and Müller, Maike and Werner, Daniel},
    booktitle = {Weiterbildungskurs für Baufachleute 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/203229733},
    year = {2015},
    month = {11},
    day = {03},
    eventdate = {2015-11-03/2015-11-03},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {LED als Lichtquelle im Stall},
    type = {Konferenzschrift},
    venue = {Schweizerischen Eidgenossenschaft, Gemeindezentrum Aadorf, Agroscope Tänikon, Switzerland},
    }
  • R. Löhr, M. Kempf, F. Ohnhäuser, J. Röber, R. Weigel, and A. Bänisch, "Implementation of a High-Speed Flash ADC for High Performance Pipeline ADCs in an 180nm CMOS Process" in International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS), Nusa Dua, Bali, 2015. [DOI] [Bibtex]
    @inproceedings{loehr2015,
    abstract = {Pipeline Analog to Digital Converters (ADC) use a sub-ADC in each pipeline stage. They require a much higher sampling rate and less accuracy. For that reason Flash ADCs are predestined for sub-ADCs. In this paper a differential Flash ADC is presented for a targeted pipeline ADC with 16 Bit, 200 MS/s and a 1.5 Bit resolution per stage. The overall accuracy of the Flash ADC is 30mV and a typical propagation delay of around 400 ps is achieved. This corresponds to a sampling rate of 2.5 GS/s. In addition, a new numerical method for an effective simulation of the propagation delay and offset is presented.},
    author = {Löhr, Robert and Kempf, Markus and Ohnhäuser, Frank and Röber, Jürgen and Weigel, Robert and Bänisch, Andreas},
    booktitle = {International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120749684},
    year = {2015},
    month = {11},
    doi = {10.1109/ISPACS.2015.7432788},
    eventtitle = {International Symposium on Intelligent Signal Processing and Communication Systems (ISPACS)},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Implementation of a High-Speed Flash ADC for High Performance Pipeline ADCs in an 180nm CMOS Process},
    venue = {Nusa Dua, Bali},
    }
  • M. Hofmann, "Six-Port-Based Microwave Spectroscopy of Dielectric Materials for Non-Invasive ISM Applications", 2015. [Bibtex]
    @phdthesis{hofmann2015,
    author = {Hofmann, Maximilian},
    institution = {FAU Erlangen-Nürnberg},
    language = {English},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/111948584},
    year = {2015},
    month = {11},
    day = {11},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783944057385},
    peerreviewed = {automatic},
    title = {Six-Port-Based Microwave Spectroscopy of Dielectric Materials for Non-Invasive ISM Applications},
    type = {Dissertation},
    }
  • A. Hagelauer, W. Akstaller, A. Tag, and R. Weigel, "Characterization and Modeling of Nonlinearities in RF BAW Components for Mobile Communication" in Sixth International Symposium on Acoustic Wave Devices for Future Mobile Communication, Chiba, Japan, 2015, pp. 18-23. [Bibtex]
    @inproceedings{hagelauer2015,
    author = {Hagelauer, Amelie and Akstaller, Wolfgang and Tag, Andreas and Weigel, Robert},
    booktitle = {Sixth International Symposium on Acoustic Wave Devices for Future Mobile Communication},
    cris = {https://cris.fau.de/converis/publicweb/publication/119377324},
    year = {2015},
    month = {11},
    day = {24},
    eventdate = {2015-11-24/2015-11-25},
    faupublication = {yes},
    pages = {18--23},
    peerreviewed = {unknown},
    title = {Characterization and Modeling of Nonlinearities in RF BAW Components for Mobile Communication},
    venue = {Chiba, Japan},
    }
  • Z. Abou-Chahine, "Outphasing RF Power Amplifiers for Mobile Communication Base Station Applications", 2015. [Bibtex]
    @phdthesis{abou-chahine2015,
    author = {Abou-Chahine, Zeid},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/122958264},
    year = {2015},
    month = {11},
    day = {09},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Outphasing RF Power Amplifiers for Mobile Communication Base Station Applications},
    type = {Dissertation},
    }
  • Y. Can and G. Fischer, "New Orthogonalizing Boolean Equation using in the Calculation of Test Patterns for Combinatorial Circuits" in ELECO 2015, Bursa, Turkey, 2015. [DOI] [Bibtex]
    @inproceedings{can2015a,
    abstract = {In this paper a new Boolean equation for the orthogonalization of Boolean functions respectively of Ternary-Vector-Lists of disjunctive normal form is presented. It provides the mathematical
    solution of orthogonalization. The new equation is based on the new method of orthogonalizing OR-ing gwhich enables the building the union of two product terms respectively of two Ternary-Vectors whereby the result is orthogonal. The algorithm based on the new equation has a faster computation time in contrast to other methods. Further advantage is the smaller number of the product terms respectively of the Ternary-Vectors in the orthogonalized result which reduces the number of further calculation steps. Furthermore, the new equation can be used as a part in the calculation procedure of getting suitable test patterns for combinatorial circuits for verifying~ feasible logical faults.}, author = {Can, Yavuz and Fischer, Georg}, editor = {Supported, IEEE}, language = {English}, booktitle = {ELECO 2015}, cris = {https://cris.fau.de/converis/publicweb/publication/115237144}, year = {2015}, month = {11}, day = {26}, doi = {10.1109/ELECO.2015.7394481}, eventdate = {2015-11-26/2015-11-28}, eventtitle = {9th International Conference on Electrical and Electronics Engineering}, faupublication = {yes}, keywords = {Boolean Normal Forms}, peerreviewed = {Yes}, title = {New Orthogonalizing Boolean Equation using in the Calculation of Test Patterns for Combinatorial Circuits}, type = {Konferenzschrift}, venue = {Bursa, Turkey}, }
  • Y. Can and G. Fischer, "New Orthogonalizing Boolean Equation using in the Calculation of Test Patterns for Combinatorial Circuits" in 9th International Conference on Electrical and Electronics Engineering (ELECO 2015), IEEE Turkey Section, Bursa, Turkey, 2015. [DOI] [Bibtex]
    @inproceedings{can2015c,
    abstract = {In this paper a new Boolean equation for the orthogonalization of Boolean functions respectively of Ternary-Vector-Lists of disjunctive normal form is presented. It provides the mathematical solution of orthogonalization. The new equation is based on the new method of orthogonalizing OR-ing ∨ which enables
    the building the union of two product terms respectively of two Ternary-Vectors whereby the result is orthogonal. The algorithm based on the new equation has a faster computation time in contrast to other methods. Further advantage is the smaller number of the product terms respectively of the Ternary-Vectors in the orthogonalized result which reduces the number of further calculation steps. Furthermore, the new equation can be used
    as a part in the calculation procedure of getting suitable test patterns for combinatorial circuits for verifying feasible Logical faults.
    }, author = {Can, Yavuz and Fischer, Georg}, language = {English}, booktitle = {9th International Conference on Electrical and Electronics Engineering (ELECO 2015), IEEE Turkey Section}, cris = {https://cris.fau.de/converis/publicweb/publication/208636161}, year = {2015}, month = {11}, day = {26}, doi = {10.1109/ELECO.2015.7394481}, eventdate = {2015-11-26/2015-11-28}, faupublication = {yes}, peerreviewed = {unknown}, title = {New Orthogonalizing Boolean Equation using in the Calculation of Test Patterns for Combinatorial Circuits}, type = {Konferenzschrift}, venue = {Bursa, Turkey}, }
  • T. Lenhard and A. Koelpin, "Sichere und interaktive Steuerung von Produktionsanlagen durch vernetzte Umfeldsensoren" in MikroSystemTechnik Kongress (MST), Karlsruhe, 2015, pp. 1-2. [Bibtex]
    @inproceedings{lenhard2015,
    abstract = {Im Rahmen der Initiative Industrie 4.0 ist eines der Hauptthemen das dynamische Reagieren von bislang unflexiblen Produktionseinrichtungen auf wechselnde Anforderungen und Umgebungseinflüsse. In Zusammenarbeit mit der Universität Erlangen-Nürnberg und den Industriepartnern Siemens CT und Schnaithmann GmbH entwickelt die InnoSenT GmbH ein cyber-physisches Sensorsystem, das alle Distanzinformationen liefert, um in Echtzeit eine Interaktion zwischen Mensch und Maschine oder zwischen mehreren Maschinen zu ermöglichen [1]. Basis des Sensorkonzeptes ist ein universeller interferometrischer Radarsensor mit konfigurierbarer Antenne und einer Messgenauigkeit im Sub-mm-Bereich. Die Arbeiten beinhalten die Entwicklung einer speziellen integrierten Schaltung (MMIC) und neuartiger Packaging-Konzepte.},
    author = {Lenhard, Thilo and Koelpin, Alexander},
    publisher = {VDE},
    booktitle = {MikroSystemTechnik Kongress (MST)},
    cris = {https://cris.fau.de/converis/publicweb/publication/119985404},
    year = {2015},
    month = {10},
    day = {26},
    eventdate = {2015-10-26/2015-10-28},
    faupublication = {yes},
    isbn = {9783800741007},
    keywords = {Radar; SAR},
    pages = {1--2},
    peerreviewed = {Yes},
    title = {Sichere und interaktive Steuerung von Produktionsanlagen durch vernetzte Umfeldsensoren},
    venue = {Karlsruhe},
    }
  • A. Tag, V. Chauhan, R. Weigel, A. Hagelauer, B. Bader, C. Huck, M. Pitschi, and D. Karolewski, "Multiphysics Modeling of BAW Filter" in IEEE International Ultrasonics Symposium, Taipei, Taiwan, 2015, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{tag2016a,
    author = {Tag, Andreas and Chauhan, Vikrant and Weigel, Robert and Hagelauer, Amelie and Bader, Bernhard and Huck, Christian and Pitschi, Maximilian and Karolewski, Dominik},
    publisher = {IEEE},
    booktitle = {IEEE International Ultrasonics Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/123752684},
    year = {2015},
    month = {10},
    day = {21},
    doi = {10.1109/ULTSYM.2015.0115},
    eventdate = {2015-10-21/2015-10-24},
    eventtitle = {IEEE International Ultrasonics Symposium (IUS)},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Multiphysics Modeling of BAW Filter},
    venue = {Taipei, Taiwan},
    }
  • F. Lurz, S. Mann, S. Linz, S. Lindner, R. Weigel, and A. Koelpin, "LabVIEW basierte Echtzeit-Signalverarbeitung für Low-Power-Radarsensorik," in Virtuelle Instrumente in der Praxis 2015, R. Jamal Rahman; Heinze, Ed., VDE-Verlag, 2015, pp. 245-248. [Bibtex]
    @inbook{lurz2015a,
    abstract = {Hochfrequenz-Radarsensoren haben sich in letzter Zeit als eine vielversprechende Alternative zu herkömmlichen Anwesenheitssensoren wie Passiv-Infrarot oder Ultraschall bewährt. Aufgrund ihrer hohen Ortsauflösung können Radarsysteme eine drahtlose Detektion von Vitalparametern, wie Herzschlag oder Atmung, durchführen und so auch sich nicht bewegende Personen detektieren. Dieses Dokument beschreibt die LabVIEW basierte Signalverarbeitung für ein 24 GHz Low-Power-Radarsystem. Für eine effiziente Evaluierung der Detektionsalgorithmen müssen diese unter weichen Echtzeitbedingungen ausgeführt werden, um ein verzögerungsfreies und flüssiges Feedback der graphischen Oberfläche zu erhalten.},
    author = {Lurz, Fabian and Mann, Sebastian and Linz, Sarah and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    editor = {Jamal, Rahman; Heinze, Ronald},
    language = {German},
    publisher = {VDE-Verlag},
    booktitle = {Virtuelle Instrumente in der Praxis 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/108047764},
    year = {2015},
    month = {10},
    faupublication = {yes},
    isbn = {9783800736690},
    pages = {245--248},
    peerreviewed = {Yes},
    title = {LabVIEW basierte Echtzeit-Signalverarbeitung für Low-Power-Radarsensorik},
    type = {Band aus einer Reihe},
    url = {https://www.vde-verlag.de/buecher/483669/virtuelle-instrumente-in-der-praxis-2015.html},
    }
  • F. Lurz, S. Mann, S. Linz, S. Lindner, R. Weigel, and A. Koelpin, "System- und Schaltungskonzepte für Low-Power-Radarsensorik zur Anwesenheitsdetektion" in Mikrosystemtechnik-Kongress (MST), Karlsruhe, Germany, 2015, pp. 274-277. [Bibtex]
    @inproceedings{lurz2015b,
    author = {Lurz, Fabian and Mann, Sebastian and Linz, Sarah and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {German},
    booktitle = {Mikrosystemtechnik-Kongress (MST)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108046224},
    year = {2015},
    month = {10},
    day = {26},
    eventdate = {2015-10-26/2015-10-28},
    faupublication = {yes},
    isbn = {9783800741007},
    pages = {274--277},
    peerreviewed = {Yes},
    title = {System- und Schaltungskonzepte für Low-Power-Radarsensorik zur Anwesenheitsdetektion},
    venue = {Karlsruhe, Germany},
    }
  • F. Müller, D. Steinbuch, M. Steinhauer, T. Walter, and R. Weigel, "Defining Acceptable Phase-Modulated Nonlinearities in 77 GHz FMCW Automotive Radar Systems" in Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC), Taormina, Italy, 2015, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{mueller2015c,
    abstract = {A method to determine the maximum allowable frequency error of a PLL generated FMCW radar slope is presented. Using the side lobe suppression as a metric, the maximum frequency error in a linear FMCW slope is defined based on the used window function. With higher distortion frequency a higher side lobe suppression is required. It is shown that for fast chirp sequence modulation in the absence of any additional counter measures, the minimum allowable frequency error is on the order of a few kHz, which is nearly impossible to be achieved by commercial radar systems.},
    author = {Müller, Felix and Steinbuch, Dirk and Steinhauer, Matthias and Walter, Thomas and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {Integrated Nonlinear Microwave and Millimetre-wave Circuits Workshop (INMMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108048424},
    year = {2015},
    month = {10},
    day = {01},
    doi = {10.1109/INMMIC.2015.7330384},
    eventdate = {2015-10-01/2015-10-02},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {unknown},
    title = {Defining Acceptable Phase-Modulated Nonlinearities in 77 GHz FMCW Automotive Radar Systems},
    venue = {Taormina, Italy},
    }
  • A. Bittner, F. Steinhäußer, A. Talai, A. Koelpin, R. Weigel, T. Rittweg, D. Schwanke, G. Sandulache, W. Hansal, and U. Schmid, "Poröses LTCC als Substratmaterial für Höchstfrequenzradarsensoren" in International Conference on Electromagnetics in Advanced Applications (ICEAA), Karlsruhe, 2015, pp. 258-261. [DOI] [Bibtex]
    @inproceedings{bittner2015,
    author = {Bittner, Achim and Steinhäußer, Frank and Talai, Armin and Koelpin, Alexander and Weigel, Robert and Rittweg, Thomas and Schwanke, Dieter and Sandulache, Gabriela and Hansal, Wolfgang and Schmid, Ulrich},
    publisher = {IEEE},
    booktitle = {International Conference on Electromagnetics in Advanced Applications (ICEAA)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122810204},
    year = {2015},
    month = {10},
    day = {12},
    doi = {10.1109/ICEAA.2011.6046404},
    eventdate = {2011-09-12/2011-09-16},
    faupublication = {yes},
    pages = {258--261},
    peerreviewed = {Yes},
    title = {Poröses LTCC als Substratmaterial für Höchstfrequenzradarsensoren},
    venue = {Karlsruhe},
    }
  • M. Kloc, N. Franchi, M. Gardill, and R. Weigel, "Cognitive Multi-Radio as Enabler for Deterministic Dynamic Spectrum Access" in Wireless Innovation Forum European Conference on Communication Technologies and Software Defined Radio (WInnComm-Europe), 2015. [Bibtex]
    @inproceedings{kloc2015,
    abstract = {Cognitive radio (CR) is a promising approach to enable dynamic spectrum access (DSA) and to handle spectral efficiency in licensed frequency bands. In this presentation, two new concepts, called cognitive multi-radio (CMR) and deterministic dynamic spectrum access (D-DSA), are introduced. These concepts help to increase the spectrum agility and hence to improve the deterministic broadband spectrum access in unlicensed industrial, medical and scientific (ISM) bands, where shared spectrum lead to interferences and/or collisions, which consequently degrade transmission performance. Here, the CMR-based D-DSA approach is discussed in context with industrial wireless communications (IWC), where a real-time capable transmission behavior with high determinism, high reliability and low-latency (round-trip latency budget ≤ 1 ms) is required. In addition, a CMR hardware architecture, which is based on the software-defined radio (SDR) principle, is proposed.},
    author = {Kloc, Matej and Franchi, Norman and Gardill, Markus and Weigel, Robert},
    language = {English},
    booktitle = {Wireless Innovation Forum European Conference on Communication Technologies and Software Defined Radio (WInnComm-Europe)},
    cris = {https://cris.fau.de/converis/publicweb/publication/107578064},
    year = {2015},
    month = {10},
    eventtitle = {Wireless Innovation Forum European Conference on Communication Technologies and Software Defined Radio (WInnComm-Europe)},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Cognitive Multi-Radio as Enabler for Deterministic Dynamic Spectrum Access},
    }
  • A. Tag, B. Bader, C. Huck, D. Karolewski, M. Pitschi, R. Weigel, and A. Hagelauer, "Impact of Spatial Distribution of Dissipated Power to Modeling of SMR BAW Resonators at High Power Levels", IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control, vol. 62, iss. 10, pp. 1856-1864, 2015. [DOI] [Bibtex]
    @article{tag2015b,
    author = {Tag, Andreas and Bader, Bernhard and Huck, Christian and Karolewski, Dominik and Pitschi, Maximilian and Weigel, Robert and Hagelauer, Amelie},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/106957884},
    year = {2015},
    month = {10},
    doi = {10.1109/TUFFC.2015.007036},
    faupublication = {yes},
    issn = {0885-3010},
    journaltitle = {IEEE Transactions on Ultrasonics Ferroelectrics and Frequency Control},
    number = {10},
    pages = {1856--1864},
    peerreviewed = {Yes},
    shortjournal = {IEEE T ULTRASON FERR},
    title = {Impact of Spatial Distribution of Dissipated Power to Modeling of SMR BAW Resonators at High Power Levels},
    volume = {62},
    }
  • A. Talai, F. Steinhäußer, A. Bittner, U. Schmid, R. Weigel, and A. Koelpin, "Modellierung nass-chemischer Porosizierverahren auf LTCC für elektromagnetische Hochfrequenz Feldsimulation" in Mikrosystemtechnik Kongress (MST), Karlsruhe, 2015, pp. 396-399. [Bibtex]
    @inproceedings{talai2015c,
    author = {Talai, Armin and Steinhäußer, Frank and Bittner, Achim and Schmid, Ulrich and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Mikrosystemtechnik Kongress (MST)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108073284},
    year = {2015},
    month = {10},
    day = {26},
    eventdate = {2015-10-26/2015-10-28},
    faupublication = {yes},
    isbn = {9783800741007},
    keywords = {LTCC},
    pages = {396--399},
    peerreviewed = {Yes},
    title = {Modellierung nass-chemischer Porosizierverahren auf LTCC für elektromagnetische Hochfrequenz Feldsimulation},
    venue = {Karlsruhe},
    }
  • M. Gardill, S. Linz, G. Fischer, and R. Weigel, "Praktikumsversuch CW/FMCW-Radar auf Basis von myRIO," in Virtuelle Instrumente in der Praxis 2015, R. Jamal Rahman; Heinze, Ed., VDE-Verlag, 2015, pp. 376-382. [Bibtex]
    @inbook{gardill2015,
    abstract = {Im Rahmen der Akademischen Bildungsinitiative zur Elektromobilität Bayern – Sachsen, gefördert durch die Initiative Schaufenster Elektromobilität der Bundesregierung, ist an der FAU Erlangen-Nürnberg ein neuer Praktikumsversuch zum Thema drahtlose Automobilelektronik entstanden. Im Rahmen dieses Praktikumsversuchs entwicklen und evaluieren die Studierenden ein CW/FMCW Radarsystem bei 24GHz. Das Radarsystem besteht dabei lediglich aus zwei Hardwarekomponenten: einem industriellen low-cost Radar Frontend sowie der National Instruments myRIO Plattform, es sind keine weiteren Hardwarekomponen-ten notwendig. In diesem Beitrag wird gezeigt, wie die myRIO Plattform in diesem Praktikumsversuch eingesetzt wird und wie mit myRIO somit kostengünstig ein technisch anspruchsvoller Versuch im Bereich der Mikrowellentechnik realisiert wird.},
    author = {Gardill, Markus and Linz, Sarah and Fischer, Georg and Weigel, Robert},
    editor = {Jamal, Rahman; Heinze, Ronald},
    publisher = {VDE-Verlag},
    booktitle = {Virtuelle Instrumente in der Praxis 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/124221284},
    year = {2015},
    month = {10},
    faupublication = {yes},
    isbn = {9783800736690},
    pages = {376--382},
    peerreviewed = {Yes},
    title = {Praktikumsversuch CW/FMCW-Radar auf Basis von myRIO},
    type = {Band aus einer Reihe},
    }
  • A. Ali, "Baseband Architecture Design of Massive MIMO Communication System with FPGAs" in 26th Meeting of ITG Professional Group for Applied Information Theory on Massive MIMO Theory and Applications, Stuttgart, Germany, 2015. [Bibtex]
    @inproceedings{ali2015a,
    author = {Ali, Arslan},
    booktitle = {26th Meeting of ITG Professional Group for Applied Information Theory on Massive MIMO Theory and Applications},
    cris = {https://cris.fau.de/converis/publicweb/publication/216761682},
    year = {2015},
    month = {10},
    day = {08},
    eventdate = {2015-10-08/2015-10-08},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Baseband Architecture Design of Massive MIMO Communication System with FPGAs},
    type = {Konferenzschrift},
    venue = {Stuttgart, Germany},
    }
  • A. Tobola, R. Rybalko, O. Korpok, F. J. Streit, C. Espig, C. Hofmann, B. Schmitz, M. Struck, C. Weigand, and G. Fischer, "ULPSEK – Ultra-Low-Power Sensor Evaluation Kit" in FOCUS Session "Wearable Sensors", BMT, 2015, 2015. [DOI] [Bibtex]
    @inproceedings{tobola2015b,
    author = {Tobola, Andreas and Rybalko, Ruslan and Korpok, Oliver and Streit, Franz J. and Espig, Chris and Hofmann, Christian and Schmitz, Björn and Struck, Matthias and Weigand, Christian and Fischer, Georg},
    booktitle = {FOCUS Session "Wearable Sensors", BMT, 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/122822744},
    year = {2015},
    month = {09},
    day = {16},
    doi = {10.1515/BMT-2015-5018},
    eventdate = {2015-09-16/2015-09-16},
    faupublication = {yes},
    peerreviewed = {No},
    title = {ULPSEK – Ultra-Low-Power Sensor Evaluation Kit},
    }
  • A. Bauch, M. Hofmann, J. Nehring, R. Weigel, and D. Kissinger, "A 2-30 GHz Multi-Octave Planar Microwave Six-Port for Reflectometry Applications" in European Microwave Conference (EuMC), Paris, France, 2015, pp. 52-55. [DOI] [Bibtex]
    @inproceedings{bauch2015,
    abstract = {This paper presents a planar multilayer six-port circuit implementation based on multi-octave directional couplers. The presented six-port circuit is the first published six-port, that is capable of operating in an ultra-boradband frequency range from 2 to 30 GHz. Within this spectrum the six-port allows for the determination of the complex reflexion coefficient through four scalar power measurements. The six-port circuit is based on the quasi-optimal design proposed by Engen. Proper functionality has been verified through measurements of the S-parameters and the calculated q-points.},
    author = {Bauch, Andreas and Hofmann, Maximilian and Nehring, Johannes and Weigel, Robert and Kissinger, Dietmar},
    publisher = {IEEE},
    booktitle = {European Microwave Conference (EuMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/121621984},
    year = {2015},
    month = {09},
    day = {07},
    doi = {10.1109/EUMC.2015.7345697},
    eventdate = {2015-09-07/2015-09-10},
    faupublication = {yes},
    pages = {52--55},
    peerreviewed = {Yes},
    title = {A 2-30 GHz Multi-Octave Planar Microwave Six-Port for Reflectometry Applications},
    venue = {Paris, France},
    }
  • M. Trautmann, "Implementation of Simultaneous Energy and Data Transfer for Charging Electric Vehicles" in 4th International Energy Transfer for Electric Vehicles Conference (ETEV), Nuremberg, Germany, 2015. [Bibtex]
    @inproceedings{trautmann2015,
    author = {Trautmann, Martin},
    booktitle = {4th International Energy Transfer for Electric Vehicles Conference (ETEV)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122509904},
    year = {2015},
    month = {09},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Implementation of Simultaneous Energy and Data Transfer for Charging Electric Vehicles},
    venue = {Nuremberg, Germany},
    }
  • K. Reiter, D. Werner, and A. Pelzer, "Merkblatt Beleuchtungstechnik in der Milchviehhaltung" in DLG Fachausschuss für Tiergerechtheit, Lehr- und Forschungsgut der tierärztlichen Hochschule Hannover Ruthe, 2015. [Bibtex]
    @inproceedings{reiter2015,
    author = {Reiter, Klaus and Werner, Daniel and Pelzer, Andreas},
    booktitle = {DLG Fachausschuss für Tiergerechtheit},
    cris = {https://cris.fau.de/converis/publicweb/publication/203230029},
    year = {2015},
    month = {09},
    day = {29},
    eventdate = {2015-09-29/2015-09-29},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Merkblatt Beleuchtungstechnik in der Milchviehhaltung},
    type = {Konferenzschrift},
    venue = {Lehr- und Forschungsgut der tierärztlichen Hochschule Hannover Ruthe},
    }
  • F. Trenz, M. Hofmann, R. Weigel, and D. Kissinger, "A Broadband 3-29 GHz Reflectometer with a Frequency Compensated Multilayer Sixport Structure" in 2015 European Microwave Week, Paris, France, 2015. [DOI] [Bibtex]
    @inproceedings{trenz2015,
    abstract = {In this paper, a planar broadband sixport reflectometer structure is presented. A frequency range from 3 to 29 GHz could be achieved by merging broadband components into a single multilayer pcb stackup with an area of 66x55 mm2 . The reflectometric architecture used herein allows a frequency independent q-point configuration of the sixport by implementing microstrip linelength compensation. Broadband matching of around -10 dB could be reached at all ports in a frequency range from 1 to 30 GHz. Acceptable coupling from DUT port to measurement output could be reached in a range from 2 to 29 GHz. Frequency compensation of the structure and an optimal q-point constellation of 120-120-120 have been verified by measurement. Due to its broadband functionality, compactness and cost efficiency, the proposed system is suitable for a wide range of microwave measurement applications.},
    author = {Trenz, Florian and Hofmann, Maximilian and Weigel, Robert and Kissinger, Dietmar},
    publisher = {IEEE},
    booktitle = {2015 European Microwave Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/124142524},
    year = {2015},
    month = {09},
    day = {06},
    doi = {10.1109/EUMC.2015.7345765},
    eventdate = {2015-09-06/2015-09-11},
    eventtitle = {The European Microwave Conference},
    faupublication = {yes},
    keywords = {Reflectometry; sixport; Microwave circuits; broadband},
    peerreviewed = {Yes},
    title = {A Broadband 3-29 GHz Reflectometer with a Frequency Compensated Multilayer Sixport Structure},
    type = {Konferenzschrift},
    venue = {Paris, France},
    }
  • F. Trenz, V. Kalpen, R. Weigel, and D. Kissinger, "Modeling and Measurement of a Tissue-Equivalent Liquid for Noninvasive Dehydration Sensing in the 2.45 GHz ISM-Band" in IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications(IMWS-Bio 2015), Taipei, Taiwan, 2015. [DOI] [Bibtex]
    @inproceedings{trenz2015a,
    abstract = {In this paper, a blood-equivalent liquid is presented. The phantom material at room temperature is a valid representation of blood at body temperature in the frequency range from 2 to 3 GHz with an maximum deviation of ±1.5 in eps1 and ±2.8 in eps2 . The effect of a hypertonic variation of the plasma hydration level has been modeled by varying the amount of water ±14 % in the tissue-equivalent fluid. Transmission based measurements have been performed on a tube phantom of PMMA with narrowband patch antennas on flexible substrates. The antennas have been placed at opposite sides of the phantom and measurements have been performed at different hydration levels of the substitute liquid. A clear distinction of the levels can be seen in both magnitude and phase of the transmission coefficient.},
    author = {Trenz, Florian and Kalpen, Victoria and Weigel, Robert and Kissinger, Dietmar},
    language = {English},
    booktitle = {IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications(IMWS-Bio 2015)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122812404},
    year = {2015},
    month = {09},
    day = {21},
    doi = {10.1109/IMWS-BIO.2015.7303761},
    eventdate = {2015-09-21/2015-09-23},
    eventtitle = {IEEE MTT-S International Microwave Workshop Series on RF and Wireless Technologies for Biomedical and Healthcare Applications},
    faupublication = {yes},
    keywords = {Biomedical measurement; Biomedical monitoring; Biological system modeling; Microwave sensors; Biosensors; Phantoms},
    peerreviewed = {Yes},
    title = {Modeling and Measurement of a Tissue-Equivalent Liquid for Noninvasive Dehydration Sensing in the 2.45 GHz ISM-Band},
    type = {Konferenzschrift},
    venue = {Taipei, Taiwan},
    }
  • F. Müller, D. Steinbuch, T. Walter, and R. Weigel, "Modellierung und Simulation von Einschwingvorgängen bei Automobilradaren mit Chirp-Sequence-Modulation" in Kleinheubacher Tagung, Miltenberg, 2015. [Bibtex]
    @inproceedings{mueller2015b,
    author = {Müller, Felix and Steinbuch, Dirk and Walter, Thomas and Weigel, Robert},
    booktitle = {Kleinheubacher Tagung},
    cris = {https://cris.fau.de/converis/publicweb/publication/106962504},
    year = {2015},
    month = {09},
    day = {28},
    eventdate = {2015-09-28/2015-09-30},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Modellierung und Simulation von Einschwingvorgängen bei Automobilradaren mit Chirp-Sequence-Modulation},
    type = {Abstract zum Vortrag},
    venue = {Miltenberg},
    }
  • D. Werner, M. Schneider, E. Schwenzfeier-Hellkamp, M. Müller, and K. Reiter, "Lichtmessung in der Stallumgebung" in DLG Fachausschuss für Tiergerechtheit, Lehr- und Forschungsgut der tierärztlichen Hochschule Hannover, Ruthe, 2015. [Bibtex]
    @inproceedings{werner2015a,
    author = {Werner, Daniel and Schneider, Michael and Schwenzfeier-Hellkamp, Eva and Müller, Maike and Reiter, Klaus},
    booktitle = {DLG Fachausschuss für Tiergerechtheit},
    cris = {https://cris.fau.de/converis/publicweb/publication/203279163},
    year = {2015},
    month = {09},
    day = {29},
    eventdate = {2015-09-29/2015-09-29},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Lichtmessung in der Stallumgebung},
    type = {Konferenzschrift},
    venue = {Lehr- und Forschungsgut der tierärztlichen Hochschule Hannover, Ruthe},
    }
  • C. Lindner, C. Söll, J. Röber, A. Bänisch, and R. Weigel, "Yield Analysation and Optimization Methods for Active CMOS Pixels" in 8. GMM/ITG/GI-Fachtagung Zuverlässigkeit und Entwurf (ZuE), Siegen, Germany, 2015, pp. 107-114. [Bibtex]
    @inproceedings{lindner2015b,
    abstract = {This work explains how to simulate error sources in image sensors to analyze yield. Moreover, two circuitry-wise methods to reduce these interferences are proposed and their influences on yield and standard deviation caused by process variations and reset noise are analyzed. Thereby the biggest sources of interference within the pixel architectures are described. After comparing three different pixel architectures, their extracted layout is simulated and the results are compared. Especially the change of the yield and the standard deviation with and without the use of DS and CDS are analyzed. By applying the methods mentioned before the yield could be increased by up to 15.6 %.},
    author = {Lindner, Claus and Söll, Christopher and Röber, Jürgen and Bänisch, Andreas and Weigel, Robert},
    booktitle = {8. GMM/ITG/GI-Fachtagung Zuverlässigkeit und Entwurf (ZuE)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122818124},
    year = {2015},
    month = {09},
    faupublication = {yes},
    isbn = {9783800740710},
    keywords = {Yield Analysis; Active Cmos Pixel; Image Sensor; Correlated Double Sampling; Double Sampling; Simulation Method; GRK-1773},
    pages = {107--114},
    peerreviewed = {Yes},
    title = {Yield Analysation and Optimization Methods for Active CMOS Pixels},
    venue = {Siegen, Germany},
    }
  • C. Erhart, S. Lutz, J. Köhler, H. Mantz, T. Walter, and R. Weigel, "Surface velocity estimation of uids using millimetre-wave radar" in European Microwave Conference (EuMC), Paris, France, 2015, pp. 566-569. [DOI] [Bibtex]
    @inproceedings{erhart2015a,
    abstract = {This paper presents a microwave sensor which allows to measure the surface velocity of uids via determining the Doppler shift of the scattered signal. The design of the sensor follows a modular system. Thus the antenna as well as the ampli er can be exchanged easily. Measurements in industrial as well as in natural environments with di erent antennas will be shown. An extended focus will be on the development of a dielectrical waveguide antenna for near distance measurements in industrial environments. Dependency of the signal strength on the angle of polarisation will be investigated and an approach to estimate the velocity from the measured data will be introduced.},
    author = {Erhart, Christian and Lutz, Steffen and Köhler, Johannes and Mantz, Hubert and Walter, Thomas and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {European Microwave Conference (EuMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122187384},
    year = {2015},
    month = {09},
    day = {07},
    doi = {10.1109/EUMC.2015.7345826},
    eventdate = {2015-09-07/2015-09-10},
    faupublication = {yes},
    pages = {566--569},
    peerreviewed = {Yes},
    title = {Surface velocity estimation of uids using millimetre-wave radar},
    venue = {Paris, France},
    }
  • M. Müller, K. Reiter, D. Werner, M. Schneider, and E. Schwenzfeier-Hellkamp, "Lichtmessung in der Stallumgebung" in DLG Fachausschuss Technik in der tierischen Produktion, Landwirtschaftliches Bildungszentrum der Landwirtschaftskammer Niedersachsen, Echem, 2015. [Bibtex]
    @inproceedings{mueller2015e,
    author = {Müller, Maike and Reiter, Klaus and Werner, Daniel and Schneider, Michael and Schwenzfeier-Hellkamp, Eva},
    booktitle = {DLG Fachausschuss Technik in der tierischen Produktion},
    cris = {https://cris.fau.de/converis/publicweb/publication/203230808},
    year = {2015},
    month = {09},
    day = {24},
    eventdate = {2015-09-24/2015-09-24},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {Lichtmessung in der Stallumgebung},
    type = {Konferenzschrift},
    venue = {Landwirtschaftliches Bildungszentrum der Landwirtschaftskammer Niedersachsen, Echem},
    }
  • G. Fischer, "Outcomes of project BMWI C-PMSE and ETSI STF386 standardisation work on cognitive radio technology for PMSE" in EUMW European Microwave Week, Paris, France, 2015. [Bibtex]
    @inproceedings{fischer2015b,
    abstract = {There have been two initiatives one in ETSI called STF386 and one inside a German national research project named C-PMSE funded by BMWI (German Ministry of Research and Education), that both deal with cognitive radio resource management for PMSE. The ambition was to mitigate interference through cognitive techniques. Principles of cognitive radio technology were adapted to the specific requirements of PMSE. The talk will therefore start highlighting the specific characteristics of PMSE, which strongly deviate from other known systems. PMSE demands very high availability near 100% in order to avoid drop-outs. Furthermore PMSE systems often are demanded to support very low latency in the order of 2 ms per PMSE link and 5 ms round trip. As PMSE usually can’t use heavy compression techniques (Digital Source coding or analogue compression) and channels are typically narrowband (e.g. 200 kHz), the operational SNR at RF is very high in the order of 50 dB. This makes PMSE very vulnerable to interference whether originating from other systems or own transmitter intermodulation. Cognitive resource management will dynamically adjust the transmit frequencies and transmit power of PMSE equipment. If the link quality degrades or is somehow about to degrade then above radio resource parameters are readjusted. The cognitive radio resource management is following the general rationale defined by the cognitive cycle as e.g. depicted by Mitola. For this purpose knowledge about the actual situation is needed. This knowledge is obtained by supervising actual link quality regardless whether analogue or digital transmission is used and by obtaining a radio environment map and consulting a geolocation database. In order to build this radio environment map, a grid of spectrum sensors is installed at an event location. Movement profiles of PMSE devices can thus be detected. It is important to stress that the cognitive regime followed includes nonlinear consideration. Spectrum resources interdepend due to non-linear effects, meaning that PMSE links could be interfered by transmit intermodulation from two other PMSE links, which makes the management of large scale events with many PMSE links challenging. Due to high operational SNR of PMSE links intermodulation products up to 5th sometimes even 7th order must be considered in transmit frequency assignment. The techniques derived during the course of the ETSI STF386 and BMWI C-PMSE project were implemented and practically studied in a trial at Messe Berlin. Luckily partners in the two initiatives were nearly identical and work in both initiatives was conducted in synchronous manner. The talk will therefore also highlight the practical implementations and trials conducted, that proofed the desired functionality. Although the technologies developed proofed that interference could be mitigated and thus PMSE links get more reliable in spectrum hostile environments, it was discovered that no additional capacity can be obtained.},
    author = {Fischer, Georg},
    language = {English},
    publisher = {EUMA},
    booktitle = {EUMW European Microwave Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/108053704},
    year = {2015},
    month = {09},
    day = {06},
    eventdate = {2015-09-06/2015-09-11},
    eventtitle = {European Microwave Week -},
    faupublication = {yes},
    keywords = {PMSE; C-PMSE; UHF; CR; SDR},
    peerreviewed = {No},
    title = {Outcomes of project BMWI C-PMSE and ETSI STF386 standardisation work on cognitive radio technology for PMSE},
    type = {Konferenzschrift},
    venue = {Paris, France},
    }
  • G. Fischer, J. Brendel, and S. Rieß, "Cognitive PMSE for Spectrum Sharing at UHF" in Wireless Innovation Forum (SDR Forum Version 2.0), Conference on Communication Technologies and Software Defined Radio WINCOMM, Erlangen, Germany, 2015. [Bibtex]
    @inproceedings{fischer2015a,
    abstract = {This talk reports about work in ETSI STF386 pre-standardisation and a German national Research Project by BMWI named C-PMSE dealing with cognitive interference management to allow for coexistance of PMSE, DVB-T and LTE at UHF Band.},
    author = {Fischer, Georg and Brendel, Johannes and Rieß, Steffen},
    language = {English},
    publisher = {Wireless Innovation Forum},
    booktitle = {Wireless Innovation Forum (SDR Forum Version 2.0), Conference on Communication Technologies and Software Defined Radio WINCOMM},
    cris = {https://cris.fau.de/converis/publicweb/publication/109792364},
    year = {2015},
    month = {09},
    day = {06},
    eventdate = {2015-10-06/2015-10-08},
    eventtitle = {Wireless Innovation Forum (SDR Forum Version 2.0), Conference on Communication Technologies and Software Defined Radio WINCOMM},
    faupublication = {yes},
    keywords = {SDR; PMSE; C-PMSE; CR; UHF},
    peerreviewed = {No},
    title = {Cognitive PMSE for Spectrum Sharing at UHF},
    type = {Konferenzschrift},
    url = {http://www.europe.wirelessinnovation.org/past-conferences},
    venue = {Erlangen, Germany},
    }
  • M. Kaiser, "Range-Doppler-Analyse von FMCW-Sekundärradar-basierten Lokalisierungssystemen", 2015. [Bibtex]
    @phdthesis{kaiser2015,
    author = {Kaiser, Markus},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/123701204},
    year = {2015},
    month = {08},
    day = {27},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843922562},
    peerreviewed = {automatic},
    title = {Range-Doppler-Analyse von FMCW-Sekundärradar-basierten Lokalisierungssystemen},
    type = {Dissertation},
    }
  • M. Gardill, "Characterization and Design of Small Array Antennas for Direction-Of-Arrival Estimation for Ultra-Wideband Industrial FMCW Radar Systems", 2015. [Bibtex]
    @phdthesis{gardill2015a,
    author = {Gardill, Markus},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {FAU University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/122958044},
    year = {2015},
    month = {08},
    day = {26},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783944057354},
    peerreviewed = {automatic},
    title = {Characterization and Design of Small Array Antennas for Direction-Of-Arrival Estimation for Ultra-Wideband Industrial FMCW Radar Systems},
    type = {Dissertation},
    }
  • J. Röber, C. Zwick, A. Bänisch, S. Dirauf, G. Roppenecker, R. Weigel, and S. Dirauf, "Novel Control Methods for Phase Lock Loops" in European conference on circuit theory and design (ECCTD), Trondheim, 2015. [DOI] [Bibtex]
    @inproceedings{roeber2015a,
    abstract = {This paper discusses different approaches to improve the settling behavior of phase lock loops (PLL). Starting with a state-of-the-art PLL, a structure with an additional dynamic changing Loop-Filter and another structure with feed forward control are proposed. The main point of this paper is the adaption of modern control theory in the design of PLL systems to improve the behavior in case of a changing dividing factor and thereby the output frequency. For both structures, advantages and disadvantages are discussed and then the block diagram of the two approaches are presented. Both methods are compared to the state-of-the-art by simulations in MatLab Simulink. Therefore a massive changing output frequency of the PLL and the corresponding time for locking to the new output frequency is analyzed. All in all both novel PLL concepts offer a reduced settling time with respect to a specified change of the PLL output frequency.},
    author = {Röber, Jürgen and Zwick, Christian and Bänisch, Andreas and Dirauf, Simon and Roppenecker, Günter and Weigel, Robert and Dirauf, Simon},
    publisher = {IEEE},
    booktitle = {European conference on circuit theory and design (ECCTD)},
    cris = {https://cris.fau.de/converis/publicweb/publication/123893924},
    year = {2015},
    month = {08},
    doi = {10.1109/ECCTD.2015.7300091},
    eventtitle = {European conference on circuit theory and design (ECCTD)},
    faupublication = {yes},
    keywords = {PLL; Phase Lock Loop; Synthesizer; Control Theory; Behavioral Modeling},
    peerreviewed = {Yes},
    title = {Novel Control Methods for Phase Lock Loops},
    venue = {Trondheim},
    }
  • A. Talai, F. Steinhäußer, A. Bittner, U. Schmid, D. Schwanke, T. Rittweg, R. Weigel, and A. Koelpin, "Embedded Cavity based Dielectric Loss Measurements for LTCC Substrates up to 110 GHz" in IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO), Ottawa, Canada, 2015, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{talai2015b,
    abstract = {In literature there exists manifold techniques for measuring the permittivity of substrates. Printed circuit board (PCB) based methods like dielectric resonators are in general limited to determine the absolute value of the complex permittivity since e.g. a half wave resonator only provides information on the electrical length, which is inversely proportional to the square root of the absolute value of the permittivity. Additionally, dielectric loss measurements are more difficult, expensive and often limited to discrete frequency points due to resonance based measurement principles. In this paper, a PCB based dielectric loss measurement system is presented, operating from a few GHz up to 110 GHz, which is based on a differential measurement of a microstrip line on dense low temperature cofired ceramics (LTCC) and a microstrip on a LTCC layer with an embedded cavity. The cavity reduces the dielectric loss of the transmission line by replacing a certain amount of substrate with air. Subsequent electromagnetic time domain field simulations allow the dielectric loss assignment over the measured transmission frequency range.},
    author = {Talai, Armin and Steinhäußer, Frank and Bittner, Achim and Schmid, Ulrich and Schwanke, Dieter and Rittweg, Thomas and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization (NEMO)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122824724},
    year = {2015},
    month = {08},
    day = {11},
    doi = {10.1109/NEMO.2015.7415066},
    eventdate = {2015-08-11/2015-08-14},
    faupublication = {yes},
    keywords = {Dielectric Loss; Differential Amplitude; Embedded Cavity; LTCC; Material Characterization},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Embedded Cavity based Dielectric Loss Measurements for LTCC Substrates up to 110 GHz},
    venue = {Ottawa, Canada},
    }
  • C. Söll, L. Shi, A. Bänisch, J. Röber, T. Ußmüller, and R. Weigel, "Analog Computation Methods with the help of analog and pseudo-digital Carry Signals" in IEEE European conference on circuit theory and design (ECCTD), Trondheim, 2015, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{soell2015a,
    abstract = {This work describes new methods of handling exceedings of the supply range in analog computation stages. These are handled as pseudo-digital and analog carry signals and used to regulate the gain of the stage where they occur as well as all computation stages that follow. A complete example for such an analog computation is simulated and presented and critical parts of the architectures are addressed. In addition, more sophisticated extensions are proposed and the ”right” way of carry handling is explained for a specific algorithm, together with a discussion of the advantages of different methods for each application.},
    author = {Söll, Christopher and Shi, Lan and Bänisch, Andreas and Röber, Jürgen and Ußmüller, Thomas and Weigel, Robert},
    booktitle = {IEEE European conference on circuit theory and design (ECCTD)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108075484},
    year = {2015},
    month = {08},
    doi = {10.1109/ECCTD.2015.7300039},
    faupublication = {yes},
    keywords = {analog computation; analog carry; pseudo-digital carry; pre-processing; GRK-1773},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Analog Computation Methods with the help of analog and pseudo-digital Carry Signals},
    venue = {Trondheim},
    }
  • Y. Can and G. Fischer, "Orthogonalizing Boolean Subtraction of Minterms or Ternary Vectors", Archives of Materials Science and Engineering, vol. 2B, iss. Vol 128, 2015. [DOI] [Bibtex]
    @article{can2014,
    author = {Can, Yavuz and Fischer, Georg},
    language = {English},
    booktitle = {ACTA PHYSICA POLONICA A},
    cris = {https://cris.fau.de/converis/publicweb/publication/123873024},
    year = {2015},
    month = {08},
    day = {25},
    doi = {10.12693/APHYSPOLA.128.B-388},
    eventdate = {2014-10-25/2014-10-29},
    eventtitle = {International Conference on Computational and Experimental Science and Engineering (ICCESEN)},
    faupublication = {yes},
    issn = {1897-2764},
    journaltitle = {Archives of Materials Science and Engineering},
    number = {Vol 128},
    peerreviewed = {Yes},
    title = {Orthogonalizing Boolean Subtraction of Minterms or Ternary Vectors},
    venue = {Antalya, Turkey},
    volume = {2B},
    }
  • E. Seler, "Funktionalisierte Mikrowellenübergänge in eWLB-Technologie", 2015. [Bibtex]
    @phdthesis{seler2015,
    author = {Seler, Ernst},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/122705924},
    year = {2015},
    month = {07},
    day = {08},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843921664},
    peerreviewed = {automatic},
    title = {Funktionalisierte Mikrowellenübergänge in eWLB-Technologie},
    type = {Dissertation},
    }
  • D. Werner, "I_LED_Milchvieh - Ein Beispielprojekt aus dem Themenschwerpunkt „Smart Light“ des Forschungsschwerpunkts Intelligente Technische EnergieSysteme (FSP ITES)" in Auftaktveranstaltung „Globale Partnerschaften“, Hochschule Bonn-Rhein-Sieg, Sankt Augustin, 2015. [Bibtex]
    @inproceedings{werner2015b,
    author = {Werner, Daniel},
    booktitle = {Auftaktveranstaltung „Globale Partnerschaften“},
    cris = {https://cris.fau.de/converis/publicweb/publication/203280688},
    year = {2015},
    month = {07},
    day = {12},
    eventdate = {2015-07-12/2015-07-12},
    faupublication = {no},
    peerreviewed = {unknown},
    title = {I_LED_Milchvieh - Ein Beispielprojekt aus dem Themenschwerpunkt „Smart Light“ des Forschungsschwerpunkts Intelligente Technische EnergieSysteme (FSP ITES)},
    type = {Konferenzschrift},
    venue = {Hochschule Bonn-Rhein-Sieg, Sankt Augustin},
    }
  • D. Kissinger, J. Nehring, A. Bauch, K. Borutta, I. Nasr, B. Lämmle, and R. Weigel, "Integrated Test Concepts for In-Situ Millimeter-Wave Device Characterization" in IEEE 13th International New Circuits and Systems Conference (NEWCAS), Grenoble, France, 2015, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{kissinger2015b,
    author = {Kissinger, Dietmar and Nehring, Johannes and Bauch, Andreas and Borutta, Karl and Nasr, Ismail and Lämmle, Benjamin and Weigel, Robert},
    booktitle = {IEEE 13th International New Circuits and Systems Conference (NEWCAS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120739344},
    year = {2015},
    month = {07},
    day = {07},
    doi = {10.1109/NEWCAS.2015.7181980},
    eventdate = {2015-06-07/2015-08-10},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {Integrated Test Concepts for In-Situ Millimeter-Wave Device Characterization},
    venue = {Grenoble, France},
    }
  • M. Hamouda, "Design of Integrated RF Components for M-Sequences Ultra-Wideband Systems", 2015. [Bibtex]
    @phdthesis{hamouda2015,
    author = {Hamouda, Mohammed},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/122239084},
    year = {2015},
    month = {07},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843922043},
    peerreviewed = {automatic},
    title = {Design of Integrated RF Components for M-Sequences Ultra-Wideband Systems},
    type = {Dissertation},
    }
  • G. Gottardo, G. Donati, C. Musolff, G. Fischer, and T. Felgentreff, "Hybrid Recursive Active Filters for High Selectivity in RF Transmitter Front-Ends" in 2nd International Scientific Symposium ”Sense. Enable. SPITSE.” 2015, St. Petersburg, Russia, 2015, pp. 15-18. [Bibtex]
    @inproceedings{gottardo2015,
    abstract = {Duplex filters in modern base stations are designed as cavity filters, which are expensive and have big dimensions. Thanks to the emerging digital technology and fast digital converters, it is possible to transfer the efforts of designing analog duplex filters into digital numeric algorithms applied to feedback structures, operating on power amplifiers in transmitters. The design of a digital baseband feedback applied to the analog power amplifiers is described making use of a model here verified by measurements. The design of hybrid filters allows the closed loop system to reach up to 20 dB difference between maximum gain and attenuation. Particular attention is dedicated to preserve stability conditions. The proposed architecture has the potential to reduce the cost and size of the RF front-ends.},
    author = {Gottardo, Giuseppe and Donati, Giovanni and Musolff, Christian and Fischer, Georg and Felgentreff, Tilman},
    language = {English},
    publisher = {St. Petersburg Electrotechnical University "LETI" Symposium Proceedings - IEEE},
    booktitle = {2nd International Scientific Symposium ”Sense. Enable. SPITSE.” 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/108057444},
    year = {2015},
    month = {07},
    day = {22},
    eventdate = {2015-06-22/2015-07-03},
    eventtitle = {2nd International Scientific Symposium "Sense. Enable. SPITSE."},
    faupublication = {yes},
    keywords = {Active filter; feedback amplifier; base station; stability analysis; interference suppression; band-pass filters; cavity resonators},
    pages = {15--18},
    peerreviewed = {Yes},
    title = {Hybrid Recursive Active Filters for High Selectivity in RF Transmitter Front-Ends},
    type = {Konferenzschrift},
    url = {http://www.eltech.ru/ru/mezhdunarodnaya-deyatelnost/spitse},
    venue = {St. Petersburg, Russia},
    }
  • C. Spranger, "Hochintegrierte verlustarme Wellenleiterübergänge zwischen Hohlleiter- und Planarschaltungen", 2015. [Bibtex]
    @phdthesis{spranger2015,
    author = {Spranger, Christoph},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/110527164},
    year = {2015},
    month = {07},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    peerreviewed = {automatic},
    title = {Hochintegrierte verlustarme Wellenleiterübergänge zwischen Hohlleiter- und Planarschaltungen},
    type = {Dissertation},
    }
  • F. Xie, R. Weiß, and R. Weigel, "Giant-Magnetoresistance-Based Galvanically Isolated Voltage and Current Measurements", IEEE Transactions on Instrumentation and Measurement, vol. 64, iss. 8, pp. 2048-2054, 2015. [DOI] [Bibtex]
    @article{xie2015,
    author = {Xie, Fei and Weiß, Roland and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/108051504},
    year = {2015},
    month = {06},
    day = {22},
    doi = {10.1109/TIM.2015.2440553},
    faupublication = {yes},
    issn = {0018-9456},
    journaltitle = {IEEE Transactions on Instrumentation and Measurement},
    number = {8},
    pages = {2048--2054},
    peerreviewed = {Yes},
    shortjournal = {IEEE T INSTRUM MEAS},
    title = {Giant-Magnetoresistance-Based Galvanically Isolated Voltage and Current Measurements},
    volume = {64},
    }
  • J. Kirchner, S. Paule, C. Beckendorf, S. Achenbach, and M. Arnold, "Circadian and circaseptan rhythms in implant-based thoracic impedance", Physiological Measurement, vol. 36, iss. 7, pp. 1615-1628, 2015. [DOI] [Bibtex]
    @article{kirchner2015,
    abstract = {

    Thoracic impedance (TI) denotes the electrical resistance that is measured between the right ventricular lead and the can of an implantable cardioverter-defibrillator. It is used in medical diagnostics for fluid load monitoring in heart failure patients. We analysed TI for diurnal and weekly components that go along with the recurrent patterns of daily life.

    TI was measured in 53 patients over 280d each with a resolution of 1h. Information about the patients' professional occupation and typical sleeping rhythm was sought. Periodic signal components were identified in the amplitude spectrum, and their main characteristics were derived by cosinor analysis. The typical daily and weekly pattern were reconstructed by Fourier filtering.

    The Fourier spectrum indicates a strong circadian and a weaker circaseptan component in TI. The latter is significantly elevated in patients who regularly go to work, on error level p < 0.05. Cosinor analysis states a significant circadian rhythm in all patients (p < 0.001), with MESOR 61.8Ohm, amplitude 1.9Ohm, and acrophase 17.5h. A significant weekly rhythm is found in 25 patients (p < 0.05), with amplitude 0.31Ohm and acrophase typically on Wednesday. Both rhythms typically obtain their maximum during the 'active' phase of the period in daily life, i.e. in the afternoon and on working days, respectively, while the minimum is reached in the 'recreative' phase.

    Circadian and circaseptan variation are hence prevalent components of TI, which can induce impedance changes of several Ohms and thus be an error source for daily TI measurements.

    }, author = {Kirchner, Jens and Paule, Stefan and Beckendorf, Claudia and Achenbach, Stephan and Arnold, Martin}, cris = {https://cris.fau.de/converis/publicweb/publication/203475017}, year = {2015}, month = {06}, day = {18}, doi = {10.1088/0967-3334/36/7/1615}, faupublication = {yes}, issn = {0967-3334}, journaltitle = {Physiological Measurement}, number = {7}, pages = {1615--1628}, peerreviewed = {Yes}, shortjournal = {PHYSIOL MEAS}, title = {Circadian and circaseptan rhythms in implant-based thoracic impedance}, type = {Article in Journal}, url = {http://stacks.iop.org/0967-3334/36/i=7/a=1615}, volume = {36}, }
  • S. Glock, J. Rascher, B. Sogl, T. Ußmüller, J. Müller, and R. Weigel, "A Memoryless Semi-Physical Power Amplifier Behavioral Model Based on the Correlation Between AM-AM and AM-PM Distortions", IEEE Transactions on Microwave Theory and Techniques, vol. 63, iss. 6, pp. 1826-1835, 2015. [DOI] [Bibtex]
    @article{glock2015,
    abstract = {A new semi-physical memoryless computationally effective behavioral model (BM) capable of predicting amplitude-modulation-to-amplitude-modulation (AM-AM) and amplitude-modulation-to-phase-modulation (AM-PM) distortions is proposed. In recent years, AM-AM and AM-PM distortions have been separately studied in literature. Here, we investigate the correlation between AM-AM and AM-PM distortions first. Based on the observed correlation, a novel AM-PM model is derived from the well-known Rapp AM-AM model. On the basis of the close relationship between the AM-AM and AM-PM model, a highly accurate and computationally effective large-signal BM is obtained. The newly developed model addresses the current needs of the mobile industry that requires BMs of the power amplifier (PA), which can be interpreted by the designers. In addition, the models must be computationally effective due to the limited computation power in mobile handset. Therefore, only memoryless BMs can be taken into account and larger errors are accepted for the sake of computational effectiveness. In this paper, it is shown that the newly introduced model achieves excellent results, when it is applied to actual industrial applications of two GaAs-based class-AB PAs in 65-nm technology and one CMOS-based class AB PA in 28-nm technology, which are designed for mobile communications.},
    author = {Glock, Stefan and Rascher, Jochen and Sogl, Bernhard and Ußmüller, Thomas and Müller, Jan-Erik and Weigel, Robert},
    cris = {https://cris.fau.de/converis/publicweb/publication/120736264},
    year = {2015},
    month = {06},
    doi = {10.1109/TMTT.2015.2418751},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {6},
    pages = {1826--1835},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {A Memoryless Semi-Physical Power Amplifier Behavioral Model Based on the Correlation Between AM-AM and AM-PM Distortions},
    volume = {63},
    }
  • C. Söll, A. Bänisch, J. Röber, L. Shi, and R. Weigel, "A Multi-Functional Reconfigurable Low-Power Ultra-High PSRR CMOS Reference-System" in IEEE Conference on PhD Research in Microelectronics and Electronics (PRIME), Glasgow, 2015, pp. 220-223. [DOI] [Bibtex]
    @inproceedings{soell2015,
    abstract = {This paper presents a new reference system with emphasis on low power design and high power supply rejection. The untrimmed reference provides a 600mV output voltage, which only differs by 5.75mV in the temperature range between -40 ° C and +125 ° C and a PSRR of -157.2 dB at 10Hz. The core part of the reference produces a reference potential of 416.1mV with a deviation of only 1.59mV. Moreover, the circuit provides a 900mV output, a temperature independent 3 µA current and trimming possibilities for the temperature curves and the amplitude of output voltages and currents. Under all operating conditions, the post-layout Corner- and Monte-Carlo-Simulations show a power consumption of less than 40 µA and ensure functionality across process, supply voltage and temperature variations.},
    author = {Söll, Christopher and Bänisch, Andreas and Röber, Jürgen and Shi, Lan and Weigel, Robert},
    booktitle = {IEEE Conference on PhD Research in Microelectronics and Electronics (PRIME)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108045124},
    year = {2015},
    month = {06},
    doi = {10.1109/PRIME.2015.7251374},
    faupublication = {yes},
    keywords = {bandgap; reference; low power; high psrr; temperature coefficient; subregulation; GRK-1773},
    pages = {220--223},
    peerreviewed = {Yes},
    title = {A Multi-Functional Reconfigurable Low-Power Ultra-High PSRR CMOS Reference-System},
    venue = {Glasgow},
    }
  • A. Tobola, F. Streit, C. Espig, O. Korpok, H. Leutheuser, C. Sauter, N. Lang, B. Schmitz, C. Hofmann, M. Struck, C. Weigand, B. Eskofier, and G. Fischer, "Sampling rate impact on energy consumption of biomedical signal processing systems" in 2015 IEEE 12th International Conference on Wearable and Implantable Body Sensor Networks, BSN 2015, Cambridge, USA, 2015, pp. 1-6. [DOI] [Bibtex]
    @inproceedings{tobola2015a,
    author = {Tobola, Andreas and Streit, Franz-Josef and Espig, Chris and Korpok, Oliver and Leutheuser, Heike and Sauter, Christian and Lang, Nadine and Schmitz, Björn and Hofmann, Christian and Struck, Matthias and Weigand, Christian and Eskofier, Björn and Fischer, Georg},
    publisher = {Institute of Electrical and Electronics Engineers Inc.},
    booktitle = {2015 IEEE 12th International Conference on Wearable and Implantable Body Sensor Networks, BSN 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/121516164},
    year = {2015},
    month = {06},
    day = {09},
    doi = {10.1109/BSN.2015.7299392},
    eventdate = {2015-06-09/2015-06-12},
    eventtitle = {12th International Conference on Wearable and Implantable Body Sensor Networks (BSN)},
    faupublication = {yes},
    isbn = {9781467372015},
    pages = {1--6},
    peerreviewed = {Yes},
    title = {Sampling rate impact on energy consumption of biomedical signal processing systems},
    type = {Konferenzschrift},
    venue = {Cambridge, USA},
    }
  • G. Fischer, "The spectrum situation for PMSE - Or why is PMSE so unique?" in PEARLE Conference, Hamburg, Germany, 2015. [Bibtex]
    @inproceedings{fischer2015,
    author = {Fischer, Georg},
    language = {English},
    publisher = {PEARLE},
    booktitle = {PEARLE Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108076804},
    year = {2015},
    month = {06},
    day = {12},
    eventdate = {2015-06-12/2015-06-13},
    eventtitle = {49th Pearle* Conference - Performing Arts Employers Associations League Europe},
    faupublication = {yes},
    keywords = {PMSE; C-PMSE; UHF; CR; SDR; Multimedia},
    peerreviewed = {No},
    title = {The spectrum situation for PMSE - Or why is PMSE so unique?},
    type = {Konferenzschrift},
    venue = {Hamburg, Germany},
    }
  • J. Rascher, "RF Switch Design for Reconfigurable Power Amplifiers with High Back-off Efficiency in nm-CMOS Technologies", 2015. [Bibtex]
    @phdthesis{rascher2015,
    author = {Rascher, Jochen},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/122252724},
    year = {2015},
    month = {06},
    day = {07},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843921312},
    peerreviewed = {automatic},
    title = {RF Switch Design for Reconfigurable Power Amplifiers with High Back-off Efficiency in nm-CMOS Technologies},
    type = {Dissertation},
    }
  • R. Richer, T. Maiwald, C. F. Pasluosta, B. Hensel, and B. Eskofier, "Novel Human Computer Interaction Principles for Cardiac Feedback using Google Glass and Android Wear" in 2015 IEEE 12th International Conference on Wearable and Implantable Body Sensor Networks (BSN), Cambridge, MA, USA, 2015. [DOI] [Bibtex]
    @inproceedings{richer2015,
    abstract = {
    This work presents a system for unobtrusive cardiac feedback in daily life. It addresses the whole pipeline from data acquisition over data processing to data visualization including wearable integration. ECG signals are recorded with a novel ECG sensor supporting Bluetooth Low Energy, which is able to transmit raw ECG data as well as estimated heart rate. ECG signals are processed in real-time on a mobile device to automatically classify the user's heart beats. A novel application for Android-based mobile devices was developed for data visualization. It offers several modes for cardiac feedback, from measuring the current heart rate to continuously monitoring the user's heart status. It also allows to store acquired data in an internal database as well as in the Google Fit platform. Further, the application provides extensions for wearables like Google Glass and smartwatches running on Android Wear. Hardware performance evaluation was performed by comparing the course of heart rate between the novel ECG sensor and a commercial ECG sensor. The mean absolute error between the two sensors was 4.83 bpm with a standard deviation of 4.46 bpm, and a Pearson correlation of 0.922. A qualitative evaluation was performed for the Android application with special emphasis on the daily usability and the wearable integration. When the Google Glass was integrated, the subjects rated the application as 2.8/5 (0 = Bad, 5 = Excellent), whereas when the application was integrated with a smartwatch the rating increased to 4.2/5.

    ~}, author = {Richer, Robert and Maiwald, Tim and Pasluosta, Cristian Federico and Hensel, Bernhard and Eskofier, Björn}, editor = {IEEE}, language = {English}, booktitle = {2015 IEEE 12th International Conference on Wearable and Implantable Body Sensor Networks (BSN)}, cris = {https://cris.fau.de/converis/publicweb/publication/117714124}, year = {2015}, month = {06}, day = {09}, doi = {10.1109/BSN.2015.7299363}, eventdate = {2015-06-09/2015-06-12}, eventtitle = {2015 IEEE 12th International Conference on Wearable and Implantable Body Sensor Networks (BSN)}, faupublication = {yes}, isbn = {9781467372015}, issn = {2376-8894}, peerreviewed = {unknown}, title = {Novel Human Computer Interaction Principles for Cardiac Feedback using Google Glass and Android Wear}, type = {Konferenzschrift}, url = {https://www.mad.tf.fau.de/files/2018/04/2015-Richer-BSN-DailyHeart.pdf}, venue = {Cambridge, MA, USA}, }

  • B. Pfundt, M. Reichenbach, D. Fey, and C. Söll, "Novel Image Processing Architecture for 3D Integrated Circuits" in Parallel -Algorithmen, -Rechnerstrukturen und -Systemsoftware (PARS), Potsdam, 2015, pp. 5-15. [Bibtex]
    @inproceedings{pfundt2015,
    abstract = {Utilizing highly parallel processors for high speed embedded image processing is a well known approach. However, the question of how to provide a sufficiently fast data rate from image sensor to processing unit is still not solved. As Trough-Silicon-Vias (TSV), a new technology for chip stacking, become available, parallel image transmission from the image sensor to processing unit is enabled. Nevertheless, the usage of a new technology requires architectural changes in the processing units.With this technology at hand, we present a novel image preprocessing architecture suitable for image processing in 3D chips stacks. The architecture was developed in parallel with a customized image sensor to make a real assembly possible. It is fully functionally verified and layouted for a 150 nm process. Our performance estimation shows a processing speed of 770 up to 30.000 fps (frames per second) for 5x5 filters.},
    author = {Pfundt, Benjamin and Reichenbach, Marc and Fey, Dietmar and Söll, Christopher},
    booktitle = {Parallel -Algorithmen, -Rechnerstrukturen und -Systemsoftware (PARS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/124219964},
    year = {2015},
    month = {05},
    faupublication = {yes},
    keywords = {3D IC; TSV; parallel processing; 2D filters; full buffering},
    pages = {5--15},
    peerreviewed = {Yes},
    title = {Novel Image Processing Architecture for 3D Integrated Circuits},
    venue = {Potsdam},
    }
  • G. A. Guarin Aristizabal, M. Hofmann, J. Nehring, R. Weigel, G. Fischer, and D. Kissinger, "Miniature Microwave Biosensors: Noninvasive Applications", IEEE Microwave Magazine, vol. 16, iss. 4, pp. 71-86, 2015. [DOI] [Bibtex]
    @article{guarin2015a,
    author = {Guarin Aristizabal, Gustavo Adolfo and Hofmann, Maximilian and Nehring, Johannes and Weigel, Robert and Fischer, Georg and Kissinger, Dietmar},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/108058104},
    year = {2015},
    month = {05},
    doi = {10.1109/MMM.2015.2394024},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {4},
    pages = {71--86},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {Miniature Microwave Biosensors: Noninvasive Applications},
    volume = {16},
    }
  • D. Kissinger, T. Girg, C. Beck, I. Nasr, H. Forstner, M. Wojnowski, K. Pressel, and R. Weigel, "Integrated millimeter-wave transceiver concepts and technologies for wireless multi-Gbps communication" in IEEE MTT-S International Microwave Symposium, Phoenix, AZ, 2015, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{kissinger2015a,
    author = {Kissinger, Dietmar and Girg, Thomas and Beck, Christopher and Nasr, Ismail and Forstner, Hans-Peter and Wojnowski, Maciej and Pressel, Klaus and Weigel, Robert},
    booktitle = {IEEE MTT-S International Microwave Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/120737584},
    year = {2015},
    month = {05},
    doi = {10.1109/MWSYM.2015.7166712},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {No},
    title = {Integrated millimeter-wave transceiver concepts and technologies for wireless multi-Gbps communication},
    type = {Konferenzschrift},
    venue = {Phoenix, AZ},
    }
  • W. Akstaller, A. Tag, C. Musolff, R. Weigel, and A. Hagelauer, "Measurement Setup for X-Parameter Characterization of Bulk Acoustic Wave Resonators" in 85th Microwave Measurement Conference (ARFTG), Phoenix, AZ, USA, 2015, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{akstaller2015,
    abstract = {In this work a modern measurement method has been utilized in order to characterize nonlinear behavior of bulk acoustic wave (BAW) solidly mounted resonators (SMR). Unlike typical nonlinearity characterization methods, the method which was employed here not only records amplitudes, but also the phase of generated harmonics. Furthermore, the relations between the harmonics of different order are given. The modeling approach being used is the poly harmonic distortion (PHD) modeling approach, realized by the measurement of X-Parameters. For that purpose it was necessary to extend a nonlinear vector network analyzer (NVNA) by external components in order to enable high power measurements. Afterwards, several optimization steps were required to perform phase calibration. This difficulty arose due to the high power incident tones and steep resonator impedance curves on the one hand and the limited power provided by the phase calibration standard on the other hand.},
    author = {Akstaller, Wolfgang and Tag, Andreas and Musolff, Christian and Weigel, Robert and Hagelauer, Amelie},
    publisher = {IEEE},
    booktitle = {85th Microwave Measurement Conference (ARFTG)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108068004},
    year = {2015},
    month = {05},
    day = {22},
    doi = {10.1109/ARFTG.2015.7162919},
    eventdate = {2015-05-22/2015-05-22},
    faupublication = {yes},
    keywords = {X-Parameter; BAW},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Measurement Setup for X-Parameter Characterization of Bulk Acoustic Wave Resonators},
    venue = {Phoenix, AZ, USA},
    }
  • A. Koelpin, F. Lurz, and R. Weigel, "Introduction in High-Resolution and Ultra-Low Power Distance Measurements by Microwave Interferometry" in IEEE International Microwave Symposium, Workshop on Modern radar systems for high resolution ranging, indoor localization, and vital signs detection, Phoenix, AZ, USA, 2015. [Bibtex]
    @inproceedings{koelpin2015,
    abstract = {Many civilian measurement applications can be realized by microwave interferometry. This radar architecture features low hardware and software complexity and can be optimized for highest distance resolutions in the micrometer regime combined with a measurement value update rate of several kilohertz or ultra-low power operation for, e.g., presence detection. Both approaches will be discussed in this talk. After introducing the basic technology and dependencies a detailed introduction to real hardware building blocks for the K band will be given. Also non-ideal effects and approaches for calibrating the system will be given. The talk will close with real world applications spreading from simple presence detection to precise distance measurements, vibration analysis and frequency determination.},
    author = {Koelpin, Alexander and Lurz, Fabian and Weigel, Robert},
    language = {English},
    booktitle = {IEEE International Microwave Symposium, Workshop on Modern radar systems for high resolution ranging, indoor localization, and vital signs detection},
    cris = {https://cris.fau.de/converis/publicweb/publication/108072624},
    year = {2015},
    month = {05},
    day = {17},
    eventdate = {2015-05-17/2015-05-22},
    faupublication = {yes},
    keywords = {Radar; Interferometry},
    peerreviewed = {unknown},
    title = {Introduction in High-Resolution and Ultra-Low Power Distance Measurements by Microwave Interferometry},
    type = {Abstract zum Vortrag},
    venue = {Phoenix, AZ, USA},
    }
  • J. Röber, A. Bänisch, G. Fischer, and R. Weigel, "A Low Noise Amplifier Chain for Digital Satellite Radio Applications" in IEEE International Symposium on Circuits and Systems (ISCAS), Lisabon, 2015. [DOI] [Bibtex]
    @inproceedings{roeber2015,
    abstract = {This paper contains the development and verification of low noise amplifier stages (LNA) within the framework of a front-end for digital satellite radio diversity receiver operating around 2.3 GHz. First, a low noise high gain LNA is developed to reach the high requirements of satellite radio reception. Therefore a single-ended cascode architecture is chosen. The simulated noise figure is 0.58 dB and the gain is 19.87 dB. Second, a differential stage is designed to fulfill the specification with regards to backward isolation and common-mode rejection. This circuit has a measured gain of 10.15 dB and a backward isolation of -43.24 dB. Furthermore, the two stages are combined by an integrated balun and the overall performance is verified. Due to the good noise performance of the first stage, the overall noise figure is 0.64 dB, the gain is 29.83 dB and the backward isolation is - 76.07 dB. All in all the whole circuit has a current consumption of 25.40 mA. Finally the LNA performance is compared with other state-of-the-art LNAs.},
    author = {Röber, Jürgen and Bänisch, Andreas and Fischer, Georg and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {IEEE International Symposium on Circuits and Systems (ISCAS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108061184},
    year = {2015},
    month = {05},
    doi = {10.1109/ISCAS.2015.7169187},
    eventtitle = {IEEE International Symposium on Circuits and Systems (ISCAS)},
    faupublication = {yes},
    keywords = {LNA; low noise; high gain; differential; distortion canceller; CCPDC},
    peerreviewed = {Yes},
    title = {A Low Noise Amplifier Chain for Digital Satellite Radio Applications},
    venue = {Lisabon},
    }
  • A. Tobola, C. Espig, F. J. Streit, O. Korpok, H. Leutheuser, B. Schmitz, C. Hofmann, M. Struck, C. Weigand, B. Eskofier, and G. Fischer, "Scalable ECG Hardware and Algorithms for Extended Runtime of Wearable Sensors" in 2015 IEEE International Symposium on Medical Measurements and Applications, Torino, Italy, 2015, pp. 255-260. [DOI] [Bibtex]
    @inproceedings{tobola2015,
    abstract = {Everything in nature tries to reach the lowest possible energy level. Therefore any natural or artificial system must have the ability to adjust itself to the changing requirements of its surrounding environment. In this paper we address this issue by an ECG sensor designed to be adjustable during runtime, having the ability to reduce the power consumption at cost of the informational content. Accessible for everyone, standard ECG hardware and open source software has been used to realize an ECG processing system for wearable applications. The average power consumption has been measured for each mode of operation. Finally we take conclusion to conciser context-aware scaling as key feature to address the energy issue of wearable sensor systems.},
    author = {Tobola, Andreas and Espig, Chris and Streit, Franz J. and Korpok, Oliver and Leutheuser, Heike and Schmitz, Björn and Hofmann, Christian and Struck, Matthias and Weigand, Christian and Eskofier, Björn and Fischer, Georg},
    publisher = {IEEE},
    booktitle = {2015 IEEE International Symposium on Medical Measurements and Applications},
    cris = {https://cris.fau.de/converis/publicweb/publication/107007824},
    year = {2015},
    month = {05},
    doi = {10.1109/MEMEA.2015.7145209},
    eventtitle = {IEEE International Symposium on Medical Measurements and Applications (MeMeA)},
    faupublication = {yes},
    isbn = {9781479964765},
    pages = {255--260},
    peerreviewed = {unknown},
    title = {Scalable ECG Hardware and Algorithms for Extended Runtime of Wearable Sensors},
    type = {Konferenzschrift},
    venue = {Torino, Italy},
    }
  • M. Richter, A. Koelpin, T. Bosselman, and R. Weigel, "Electrical Fiber Optical Sensor for High-Voltage Applications" in Proceedings SENSOR 2015, Nürnberg, 2015, pp. 804-806. [DOI] [Bibtex]
    @inproceedings{richter2015,
    abstract = {Controlling the energy transfer in high voltage grids implies using sophisticated instrumentation, which has to ensure effective insulation for 150kV to 800kV. Several solutions were previously proposed to facilitate power supply for instrumentation operating at this potential. Most of them exploit the energy dissipated by alternating current grids, which is not possible for the recently emerging direct current grids. There, no alternating electric or alternating magnetic fields are available such that power supply by fiber optical power transmission is a commonly chosen solution. However, most of these systems involve high power laser diodes that lead to a considerable amount of problems and risks. In this paper, an electrical circuit design is proposed that reduces the amount of required energy such that alternative optical power sources can be used. It has been shown that an electrical circuit can measure a temperature and transmit the results, while it is supplied with less than 180µW of power through the fiber used for data transmission. The energy necessary for measurement and transmission of a single temperature value could be reduced to 15µJ. A combination of selected components, energy saving optimized design and programming was used to cut down the energy demands such that light emitting diodes coupled to a standard multi mode fiber are sufficient for power supply.},
    author = {Richter, Markus and Koelpin, Alexander and Bosselman, Thomas and Weigel, Robert},
    booktitle = {Proceedings SENSOR 2015},
    cris = {https://cris.fau.de/converis/publicweb/publication/108054364},
    year = {2015},
    month = {05},
    day = {19},
    doi = {10.5162/SENSOR2015/P5.3},
    eventdate = {2015-05-19/2015-05-21},
    eventtitle = {Sensor+Test},
    faupublication = {yes},
    isbn = {9783981348484},
    pages = {804--806},
    peerreviewed = {unknown},
    title = {Electrical Fiber Optical Sensor for High-Voltage Applications},
    venue = {Nürnberg},
    }
  • P. Oßmann, J. Fuhrmann, J. Moreira, H. Pretl, and A. Springer, "A circuit technique to compensate PVT variations in a 28 nm CMOS cascode power amplifier" in German Microwave Conference (GeMiC), 2015. [DOI] [Bibtex]
    @inproceedings{ossmann2015,
    author = {Oßmann, Patrick and Fuhrmann, Jörg and Moreira, José and Pretl, Harald and Springer, Andreas},
    booktitle = {German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/121889724},
    year = {2015},
    month = {05},
    day = {14},
    doi = {10.1109/GEMIC.2015.7107770},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {A circuit technique to compensate PVT variations in a 28 nm CMOS cascode power amplifier},
    type = {Konferenzschrift},
    }
  • A. Talai, S. Mann, F. Steinhäußer, A. Bittner, U. Schmid, R. Weigel, and A. Koelpin, "A Semi Double-Ridged quasi TE-Waveguide based Microwave Bulk Material Characterization System" in IEEE MTT-S International Microwave Symposium (IMS), Phoenix, CA, USA, 2015, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{talai2015a,
    abstract = {Accurate microwave material characterization is essential for reliable high frequency circuit design. Therefore, various characterization techniques have been developed, comprising advantages and drawbacks for the respective conditions. In this paper, a material characterization system is presented, which enables a broadband measurement for both dielectric loss and relative permittivity of bulk substrates with variant geometrical dimensions. A semi double-ridged waveguide is used to measure the introduced phase shift and dampening due to a strip of material, allowing a combined evaluation of the complex permittivity by measurement and simulation.},
    author = {Talai, Armin and Mann, Sebastian and Steinhäußer, Frank and Bittner, Achim and Schmid, Ulrich and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE MTT-S International Microwave Symposium (IMS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122825824},
    year = {2015},
    month = {05},
    day = {17},
    doi = {10.1109/MWSYM.2015.7166937},
    eventdate = {2015-05-17/2015-05-22},
    faupublication = {yes},
    keywords = {Material Characterization; Phase Measurement; Ridged Waveguide; Relative Permittivity},
    pages = {1--4},
    peerreviewed = {Yes},
    title = {A Semi Double-Ridged quasi TE-Waveguide based Microwave Bulk Material Characterization System},
    venue = {Phoenix, CA, USA},
    }
  • A. Tag, W. Akstaller, C. Musolff, B. Bader, M. Pitschi, R. Weigel, and A. Hagelauer, "Polyharmonic Distortion Modeling of RF BAW Components" in IEEE International Microwave Symposium, Phoenix, USA, 2015, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{tag2015a,
    author = {Tag, Andreas and Akstaller, Wolfgang and Musolff, Christian and Bader, Bernhard and Pitschi, Maximilian and Weigel, Robert and Hagelauer, Amelie},
    publisher = {IEEE},
    booktitle = {IEEE International Microwave Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/123888204},
    year = {2015},
    month = {05},
    day = {17},
    doi = {10.1109/MWSYM.2015.7166954},
    eventdate = {2015-05-17/2015-05-22},
    faupublication = {yes},
    pages = {1--3},
    peerreviewed = {Yes},
    title = {Polyharmonic Distortion Modeling of RF BAW Components},
    venue = {Phoenix, USA},
    }
  • Y. Can and G. Fischer, "Boolean Orthogonalizing Combination Methods" in Fifth International Conference on Computational Science, Engineering and Information Technology, Vienna, Austria, 2015, pp. 1-88. [DOI] [Bibtex]
    @inproceedings{can2015,
    abstract = {In this paper a new logical operation method called “orthogonalizing difference-building” is presented. It is used to calculate the difference, but also the complement of a function as well as the EXOR and EXNOR of two minterms respectively two ternary-vectors or two functions respectively two ternary-vector-lists is presented. On the basis of this new method a further logical operation method called “orthogonal OR-ing” is going to be introduced. The advantages of both methods are their results, which are already available in an orthogonal form that has an essential advantage for continuing calculations. Since it applies, an orthogonal disjunctive normal form is equal to orthogonal antivalence normal form, subsequent Boolean differential calculus will be simplified.},
    author = {Can, Yavuz and Fischer, Georg},
    language = {English},
    booktitle = {Fifth International Conference on Computational Science, Engineering and Information Technology},
    cris = {https://cris.fau.de/converis/publicweb/publication/123890404},
    year = {2015},
    month = {05},
    day = {23},
    doi = {10.5121/CSIT.2015.51102},
    eventdate = {2015-05-23/2015-05-24},
    eventtitle = {Fifth International Conference on Computational Science, Engineering and Information Technology CCSEIT 2015},
    faupublication = {yes},
    isbn = {9781921987397},
    issn = {2231-5403},
    keywords = {Difference-Building,Orthogonality,TVL,Data Memory Request,Computing Time},
    pages = {1--88},
    peerreviewed = {Yes},
    title = {Boolean Orthogonalizing Combination Methods},
    type = {Konferenzschrift},
    url = {http://www.airccj.org/CSCP/vol5/csit54102.pdf},
    venue = {Vienna, Austria},
    }
  • S. Linz, F. Lurz, M. Sporer, S. Lindner, S. Mann, R. Weigel, and A. Koelpin, "Ultra-Short-Range Precise Displacement Measurement Setup with a Near Field Slot-Line Antenna and a Dedicated Spiral Calibration" in IEEE International Microwave Symposium, Phoenix, AZ, USA, 2015. [DOI] [Bibtex]
    @inproceedings{linz2015a,
    abstract = {This work introduces a precise measurement setup for displacement analysis in the near field of a tapered slot-line antenna from 0mm up to 20mm distance. Enhanced accuracy is achieved by a dedicated spiral reconstruction algorithm accounting for the near field effects. Moreover, the precision of the system in the micrometer range is guaranteed by four synchronous 24 bit analog-to-digital converters and a decimation factor of 10, leading to an overall update rate of 1 kHz.},
    author = {Linz, Sarah and Lurz, Fabian and Sporer, Michael and Lindner, Stefan and Mann, Sebastian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE International Microwave Symposium},
    cris = {https://cris.fau.de/converis/publicweb/publication/123899204},
    year = {2015},
    month = {05},
    day = {17},
    doi = {10.1109/MWSYM.2015.7167116},
    eventdate = {2015-05-17/2015-05-22},
    faupublication = {yes},
    isbn = {9781479982752},
    issn = {0149-645X},
    peerreviewed = {Yes},
    title = {Ultra-Short-Range Precise Displacement Measurement Setup with a Near Field Slot-Line Antenna and a Dedicated Spiral Calibration},
    venue = {Phoenix, AZ, USA},
    }
  • A. Cattaneo, S. Pinarello, J. Müller, and R. Weigel, "Impact of DC and RF non-conducting stress on nMOS reliability" in IEEE International Reliability Physics Symposium (IRPS), Monterey, CA, USA, 2015, p. XT4.1--XT4.4. [DOI] [Bibtex]
    @inproceedings{cattaneo2015,
    abstract = {The increase of leakage current in deep-submicrometer MOS transistors operated below threshold is becoming a reliability concern for scaled technology nodes. Especially high-power analog applications like high efficiency PAs and RF-switches undergo to strong lateral field when Vg <;Vth. Indeed an increased degradation for these MOS applications was already reported in the state of the art but not completely understood. In this paper a thorough study of the DC non-conducting (NC) stress is presented and a new physical model describing the worsening of the electrical parameter is proposed. This model is suitable for being extended to the high frequency regime by means of a quasi-static sum (QS). For the first time RF stress measurements are conducted in various NC configurations. No frequency dependency is detected up to 4Ghz and the QS model is able to precisely predict the performance degradation.},
    author = {Cattaneo, Andrea and Pinarello, Sandro and Müller, Jan-Erik and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {IEEE International Reliability Physics Symposium (IRPS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122826704},
    year = {2015},
    month = {04},
    day = {19},
    doi = {10.1109/IRPS.2015.7112835},
    eventdate = {2015-04-19/2015-04-23},
    faupublication = {yes},
    pages = {XT4.1--XT4.4},
    peerreviewed = {unknown},
    title = {Impact of DC and RF non-conducting stress on nMOS reliability},
    venue = {Monterey, CA, USA},
    }
  • S. Lutz, C. Erhart, T. Walter, and R. Weigel, "8 Channel MIMO Long Range Radar Concept for Angular Estimation in Multi Target Scenarios" in IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM), Heidelberg, 2015, pp. 1-4. [DOI] [Bibtex]
    @inproceedings{lutz2015,
    abstract = {In this contribution a novel concept for a lens based 8 channel MIMO radar is presented. Hereby the sensor concept deals with a combination of optical beamforming based on a dielectric lens and the classical MIMO radar approach to increase the angular resolution. The sensor architecture is presented, the antenna concept introduced and characterized by measurements. After a brief formulation of the signal model, the evaluation of the angular performance based on the Cramer-Rao lower bound is introduced. The paper concludes with the comparison between MIMO and MISO radar processing in real world multiple target scenarios.},
    author = {Lutz, Steffen and Erhart, Christian and Walter, Thomas and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122817244},
    year = {2015},
    month = {04},
    day = {27},
    doi = {10.1109/ICMIM.2015.7117955},
    eventdate = {2015-04-27/2015-04-29},
    faupublication = {yes},
    pages = {1--4},
    peerreviewed = {unknown},
    title = {8 Channel MIMO Long Range Radar Concept for Angular Estimation in Multi Target Scenarios},
    venue = {Heidelberg},
    }
  • S. Mueller, J. Dennerlein, I. Janke, J. Weber, R. Weigel, and A. Koelpin, "In-Containment Signal Conditioning and Transmission via Power Lines within High Dose Rate Areas of Nuclear Power Plants" in 4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA), Lisbon, Portugal, 2015, pp. 1-8. [DOI] [Bibtex]
    @inproceedings{mueller2015a,
    abstract = {Signal conditioning and transmission for sensor systems and networks within the containment of nuclear power plants (NPPs) still poses a challenge to engineers, particularly in the case of equipment upgrades for existing plants, temporary measurements, decommissioning of plants, but also for new builds. This paper presents an innovative method for efficient and cost-effective instrumentation within high dose rate areas inside the containment. A transmitter-receiver topology is proposed that allows simultaneous, unidirectional point-to-point transmission of multiple sensor signals by superimposing them on existing AC or DC power supply cables using power line communication (PLC) technology. Thereby the need for costly installation of additional cables and containment penetrations is eliminated. Based on commercial off-the-shelf (COTS) electronic parts, a radiation hard transmitter is designed to operate in harsh environment within the containment during full plant operation. Hardware modularity of the transmitter allows application specific tradeoffs between redundancy and channel bandwidth. At receiver side in non-radiated areas, signals are extracted from the power line, demodulated, and provided either in analog or digital output format. Laboratory qualification tests and field test results within a boiling water reactor (BWR) are validating the proof of concept of the proposed system.},
    author = {Mueller, Steffen and Dennerlein, Jürgen and Janke, Iryna and Weber, Johannes and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {4th International Conference on Advancements in Nuclear Instrumentation Measurement Methods and their Applications (ANIMMA)},
    cris = {https://cris.fau.de/converis/publicweb/publication/123892384},
    year = {2015},
    month = {04},
    doi = {10.1109/ANIMMA.2015.7465532},
    faupublication = {yes},
    keywords = {Power Line Communication; PLC; radiation hard electronics; radhard; sensor networks; online monitoring; OLM; monitoring and diagnostics; M&D},
    pages = {1--8},
    peerreviewed = {No},
    title = {In-Containment Signal Conditioning and Transmission via Power Lines within High Dose Rate Areas of Nuclear Power Plants},
    type = {Konferenzschrift},
    venue = {Lisbon, Portugal},
    }
  • A. Thomas, "Digitally Tunable Impedance Matching Circuits in Bulk CMOS Technology", 2015. [Bibtex]
    @phdthesis{thomas2015,
    author = {Thomas, Anthony},
    institution = {FAU Erlangen-Nürnberg},
    publisher = {Dr. Hut},
    cris = {https://cris.fau.de/converis/publicweb/publication/120743524},
    year = {2015},
    month = {04},
    day = {14},
    entrysubtype = {Dissertation},
    faupublication = {yes},
    isbn = {9783843920735},
    peerreviewed = {automatic},
    title = {Digitally Tunable Impedance Matching Circuits in Bulk CMOS Technology},
    type = {Dissertation},
    }
  • G. Vinci, T. Lenhard, C. Will, and A. Koelpin, "Microwave Interferometer Radar-Based Vital Sign Detection for Driver Monitoring Systems" in IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM), Heidelberg, Germany, 2015. [DOI] [Bibtex]
    @inproceedings{vinci2015,
    abstract = {Autonomous driving is a topic of great importance for our society and is expected to be introduced in the automotive market in a couple of decades. Today, vehicles can already autonomously brake and accelerate in order to avoid crashes with obstacles detected by camera and radar technology. The next step towards autonomous driving is the introduction of driver health monitoring systems. Intensive research is being conducted in this field with the goal of developing a ”biometric driver seat”. In this paper, an interferometric radar-based vital sign detection is presented. The aim is to investigate the applicability of radar technology for vital sign monitoring such as heartbeat and breath rate of the driver with sensors embedded in the seat. The proposed interferometric radar is based on the Six-Port receiver technique and shows excellent performance for the addressed application.},
    author = {Vinci, Gabor and Lenhard, Thilo and Will, Christoph and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108062064},
    year = {2015},
    month = {04},
    doi = {10.1109/ICMIM.2015.7117940},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Microwave Interferometer Radar-Based Vital Sign Detection for Driver Monitoring Systems},
    type = {Konferenzschrift},
    venue = {Heidelberg, Germany},
    }
  • M. Hartmann, O. Pfadenhauer, L. Patino-Studencki, H. Tröger, A. Heuberger, and J. Thielecke, "Antenna pattern optimization for a RSSI-based Direction of Arrival (DoA) localization system" in ION's Pacific PNT Conference, Honolulu, Hawaii, USA, 2015, pp. 429-433. [Bibtex]
    @inproceedings{hartmann2015,
    author = {Hartmann, Markus and Pfadenhauer, Oliver and Patino-Studencki, Lucila and Tröger, Hans-Martin and Heuberger, Albert and Thielecke, Jörn},
    publisher = {ION},
    booktitle = {ION's Pacific PNT Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/118782444},
    year = {2015},
    month = {04},
    day = {20},
    eventdate = {2015-04-20/2015-04-23},
    faupublication = {yes},
    pages = {429--433},
    title = {Antenna pattern optimization for a RSSI-based Direction of Arrival (DoA) localization system},
    url = {http://like.eei.uni-erlangen.de/bib/Hartmann2015_Antenna.pdf},
    venue = {Honolulu, Hawaii, USA},
    }
  • A. Talai, F. Steinhäußer, A. Bittner, U. Schmid, R. Weigel, and A. Koelpin, "A Method for the Determination of the Complex Permittivity by Detuned Ring Resonators for Bulk Materials up to 110 GHz", International Journal of Microwave and Wireless Technologies, vol. 7, iss. 3-4, pp. 251-260, 2015. [DOI] [Bibtex]
    @article{talai2015,
    author = {Talai, Armin and Steinhäußer, Frank and Bittner, Achim and Schmid, Ulrich and Weigel, Robert and Koelpin, Alexander},
    publisher = {Cambridge University Press},
    cris = {https://cris.fau.de/converis/publicweb/publication/108071084},
    year = {2015},
    month = {03},
    doi = {10.1017/S1759078715000483},
    faupublication = {yes},
    issn = {1759-0787},
    journaltitle = {International Journal of Microwave and Wireless Technologies},
    number = {3-4},
    pages = {251--260},
    peerreviewed = {Yes},
    title = {A Method for the Determination of the Complex Permittivity by Detuned Ring Resonators for Bulk Materials up to 110 GHz},
    volume = {7},
    }
  • M. Hierold, C. Hsieh, R. Weigel, and A. Koelpin, "Miniaturized sensor nodes with mutual detection and localization capability" in German Microwave Conference (GeMic), Nürnberg, 2015. [Bibtex]
    @inproceedings{hierold2015b,
    abstract = {Severe restrictions in size and weight of mobile nodes intended for the observation of bats result in strict limitations of their power supply. A sensor node and system design for proximity detection in bats observation considering these constraints with first field test results is presented in this talk. For further miniaturization and specific adjustment to the target application a custom system on chip solution is proposed. Its hardware design is outlined addressing energy efficiency, localization and reconfiguration capability.},
    author = {Hierold, Martin and Hsieh, Chia-Yu and Weigel, Robert and Koelpin, Alexander},
    booktitle = {German Microwave Conference (GeMic)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120739784},
    year = {2015},
    month = {03},
    faupublication = {yes},
    keywords = {wireless sensor network; low power},
    peerreviewed = {No},
    title = {Miniaturized sensor nodes with mutual detection and localization capability},
    venue = {Nürnberg},
    }
  • C. Erhart, S. Lutz, H. Mantz, T. Walter, and R. Weigel, "A highly modular 77 GHz multi-tone FMCW SiGe radar concept for industrial measurements" in German Microwave Conference (GeMiC), Nürnberg, 2015, pp. 252-255. [DOI] [Bibtex]
    @inproceedings{erhart2015,
    abstract = {In this paper, a modular system for 77 GHz applications and a novel approach to increase the accuracy of distance measurements using angular phase shifts is presented. The sensor itself consists of state of the art MMICs and provides the opportunity to exchange the beam forming component easily. The radiation characteristics of the so far developed beam formers are illustrated and some exemplary distance measurements will be shown. The sensor prototype is integrated in a robust metal case, which is usable for measurements in harsh environments. Applications for the sensor include distance, velocity as well as surface and vibration analysis. The introduced distance measuring approach is based on FMCW multi tone modulation in combination with an innovative correlation evaluation.},
    author = {Erhart, Christian and Lutz, Steffen and Mantz, Hubert and Walter, Thomas and Weigel, Robert},
    booktitle = {German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108053484},
    year = {2015},
    month = {03},
    day = {16},
    doi = {10.1109/GEMIC.2015.7107801},
    eventdate = {2015-03-16/2015-03-18},
    faupublication = {yes},
    pages = {252--255},
    peerreviewed = {Yes},
    title = {A highly modular 77 GHz multi-tone FMCW SiGe radar concept for industrial measurements},
    venue = {Nürnberg},
    }
  • D. Karolewski, A. Tag, V. Silva Cortes, A. Hagelauer, G. Fischer, and C. Schäffel, "Modeling of BAW Filters for System Level Simulation" in German Microwave Conference, Nuremberg, 2015, pp. 410-413. [DOI] [Bibtex]
    @inproceedings{karolewski2015,
    author = {Karolewski, Dominik and Tag, Andreas and Silva Cortes, Victor and Hagelauer, Amelie and Fischer, Georg and Schäffel, Christoph},
    publisher = {IEEE},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108042264},
    year = {2015},
    month = {03},
    day = {16},
    doi = {10.1109/GEMIC.2015.7107840},
    eventdate = {2015-03-16/2015-03-18},
    eventtitle = {German Microwave Conference (GeMiC)},
    faupublication = {yes},
    pages = {410--413},
    peerreviewed = {Yes},
    title = {Modeling of BAW Filters for System Level Simulation},
    venue = {Nuremberg},
    }
  • A. Tag, B. Bader, M. Pitschi, K. C. Wagner, R. Weigel, and A. Hagelauer, "Determination of Temperature Coefficients of Materials in RF BAW Resonators" in German Microwave Conference, Nürnberg, 2015, pp. 402-405. [DOI] [Bibtex]
    @inproceedings{tag2015,
    abstract = {A new, accurate, and fast approach for determining the temperature coefficients of the thin film materials used in RF BAW components has been developed allowing the precise modeling of BAW components at different ambient temperatures. The presented method is based on the investigation of several resonance frequencies of the resonators with different layer-stacks. The problem of determining the temperature coefficients from broadband resonator simulations and measurements was formulated as an overdetermined linear system of equations and solved by using the weighted least square method. The presented approach has been verified by measurements.},
    author = {Tag, Andreas and Bader, Bernhard and Pitschi, Maximilian and Wagner, Karl Christian and Weigel, Robert and Hagelauer, Amelie},
    publisher = {IEEE},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108066904},
    year = {2015},
    month = {03},
    day = {16},
    doi = {10.1109/GEMIC.2015.7107838},
    eventdate = {2015-03-16/2015-03-18},
    eventtitle = {German Microwave Conference (GeMiC)},
    faupublication = {yes},
    pages = {402--405},
    peerreviewed = {Yes},
    title = {Determination of Temperature Coefficients of Materials in RF BAW Resonators},
    venue = {Nürnberg},
    }
  • F. Müller, D. Steinbuch, T. Walter, and R. Weigel, "A method for the analysis of ramp-inherent linearity distortions in automotive radar applications" in German Microwave Conference (GeMiC), Nuremberg, Germany, 2015, pp. 217-220. [DOI] [Bibtex]
    @inproceedings{mueller2015,
    abstract = {Through the use of sensors to provide information about the vehicles surroundings, driver assistance systems increase traffic safety. These sensors must not deliver wrong data due to noise or external distortion. In FMCW Radar systems additionally a highly linear ramp is essential. Hence nonlinear ramps have direct impact on the baseband spectrum. Weak targets could be covered and therefore not detected. This paper describes a method for evaluating the RF ramp linearity, based on analysis of the baseband signal. Therefore the analysis is easier, as the baseband frequency is only a few MHz depending on chirp modulation parameters and target distance. The instantaneous frequency is measured, so that deviations from the ideal slope can be detected immediately. Results are compared with simulations and high frequency measurements with a commercial availably spectrum analyzer which calculates the mean frequency deviation over a high number of ramps.},
    author = {Müller, Felix and Steinbuch, Dirk and Walter, Thomas and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108054584},
    year = {2015},
    month = {03},
    day = {16},
    doi = {10.1109/GEMIC.2015.7107792},
    eventdate = {2015-03-16/2015-03-18},
    faupublication = {yes},
    pages = {217--220},
    peerreviewed = {Yes},
    title = {A method for the analysis of ramp-inherent linearity distortions in automotive radar applications},
    venue = {Nuremberg, Germany},
    }
  • T. Kastenhuber, J. Röber, A. Bänisch, G. Fischer, and R. Weigel, "A Miniaturized Very Low-Power Vector Modulated CMOS Phase Shifter for Wireless Receivers" in German Microwave Conference, Nürnberg, 2015, pp. 343-346. [DOI] [Bibtex]
    @inproceedings{kastenhuber2015,
    abstract = {This paper presents and analyses a phase shifter for diversity receivers, which modulates the I-/Q-vector in the constellation diagram. The system consists of a three stage programmable gain amplifier (PGA) chain in both branches. The design covers the full phase range of 360°. Each stage can be programmed to amplify the incoming signal between 19 dB and 63 dB with a centre frequency of 3MHz. The radio frequency (RF) signal is down-converted to an intermediate frequency (IF) of 5MHz, where phase shifting is done. The circuit is intended for an automotive satellite radio receiver in S- and L-band. Thus, demand automotive requirements have to be fulfilled. The supply voltage is 1.8V. Compared to other phase shifters, the power consumption of 2.7mW is highly energyefficient. This system includes a constant gm-source and a biasing circuit. All requirements are verified in post-layout Corner and Monte−Carlo analysis using Virtuoso and WiCkeD. The design only takes 0.116 mm2 of silicon area in a 150- nm CMOS technology.},
    author = {Kastenhuber, Tina and Röber, Jürgen and Bänisch, Andreas and Fischer, Georg and Weigel, Robert},
    publisher = {IEEE},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108077464},
    year = {2015},
    month = {03},
    doi = {10.1109/GEMIC.2015.7107823},
    eventtitle = {German Microwave Conference},
    faupublication = {yes},
    keywords = {Phase shifter; vector modulated; PGA; constant gm-source; low-power; diversity},
    pages = {343--346},
    peerreviewed = {Yes},
    title = {A Miniaturized Very Low-Power Vector Modulated CMOS Phase Shifter for Wireless Receivers},
    venue = {Nürnberg},
    }
  • V. Silva Cortes and G. Fischer, "Shunt MEMS switch requirements for Tunable Matching Network at 1.9 GHz in composite substrates" in German Microwave Conference (GeMiC), Nürnberg, 2015, pp. 422-425. [DOI] [Bibtex]
    @inproceedings{silva2015,
    abstract = {A theoretical approach for the specification of shunt MEMS switches suitable for Tunable Matching Networks (TMN) at 1.9GHz is presented. DC-contact fixed-fixed beam MEMS switches designed with series metal-insulator-metal (MIM) capacitors at the grounding plane of a CPW transmission line provide the basic design block for the TMN. In the down-state, the MEMS switch makes an ohmic contact with the transmission line, as consequence, the down-state capacitance of the switch is dominated by the MIM capacitors. The proper dimensioning of the MIM capacitors enables to directly increase the capacitance ratio of the switch in order to operate at frequencies below 10 GHz. Based on predefined CPW transmission line configurations on composite substrates, the optimization of the capacitance ratio of the MEMS switch can be directly related to the geometry of the CPW transmission line.},
    author = {Silva Cortes, Victor and Fischer, Georg},
    publisher = {IEEE},
    booktitle = {German Microwave Conference (GeMiC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108067124},
    year = {2015},
    month = {03},
    day = {16},
    doi = {10.1109/GEMIC.2015.7107843},
    eventdate = {2015-03-16/2015-03-18},
    eventtitle = {German Microwave Conference (GeMiC)},
    faupublication = {yes},
    keywords = {RF MEMS},
    pages = {422--425},
    peerreviewed = {Yes},
    title = {Shunt MEMS switch requirements for Tunable Matching Network at 1.9 GHz in composite substrates},
    venue = {Nürnberg},
    }
  • G. A. Guarin Aristizabal, M. Gardill, R. Weigel, G. Fischer, and D. Kissinger, "Ultra-wideband compressed sensing radar based on pseudo-random binary sequences" in German Microwave Conference, Nuremberg, Germany, 2015, pp. 233-236. [DOI] [Bibtex]
    @inproceedings{guarin2015,
    author = {Guarin Aristizabal, Gustavo Adolfo and Gardill, Markus and Weigel, Robert and Fischer, Georg and Kissinger, Dietmar},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108055024},
    year = {2015},
    month = {03},
    doi = {10.1109/GEMIC.2015.7107796},
    faupublication = {yes},
    pages = {233--236},
    peerreviewed = {Yes},
    title = {Ultra-wideband compressed sensing radar based on pseudo-random binary sequences},
    venue = {Nuremberg, Germany},
    }
  • M. Hierold, S. Ripperger, F. Mayer, R. Weigel, and A. Koelpin, "System Design for Encounter Detection of Distributed Wireless Sensors" in German Microwave Conference 2015 (Gemic), Nuremberg, Germany, 2015, pp. 382-385.