Research

Most recent projetcs

All Projects…

Most recent awards

  • R. Ciocoveanu, R. Weigel, A. Hagelauer, and V. Issakov, RWW Student Paper Competition, 2nd place, IEEE Radio and Wireless Week, 2019. [Bibtex]
    @prize{ciocoveanu_prize_2019,
    author = {Ciocoveanu, Radu and Weigel, Robert and Hagelauer, Amelie and Issakov, Vadim},
    booktitle = {IEEE Radio and Wireless Week},
    cris = {ciocoveanu_prize_2019},
    year = {2019},
    month = {01},
    day = {22},
    title = {RWW Student Paper Competition, 2nd place},
    type = {20773-Kleiner Preis},
    }
  • S. Erhardt, R. Weigel, and A. Koelpin, Radio Wireless Week Student Paper Competition, 1st Place, IEEE, 2019. [Bibtex]
    @prize{erhardt_prize_2019,
    author = {Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE},
    cris = {erhardt_prize_2019},
    year = {2019},
    month = {01},
    day = {22},
    title = {Radio Wireless Week Student Paper Competition, 1st Place},
    type = {20773-Kleiner Preis},
    }
  • J. Lichtblau, Förderung einer Kongressreise (IEEE Radio and Wireless Symposium 2019), Deutscher Akademischer Austauschdienst, 2019. [Bibtex]
    @prize{lichtblau_prize_2019,
    author = {Lichtblau, Johann},
    booktitle = {Deutscher Akademischer Austauschdienst},
    cris = {lichtblau_prize_2019},
    year = {2019},
    title = {Förderung einer Kongressreise (IEEE Radio and Wireless Symposium 2019)},
    type = {20773-Kleiner Preis},
    }
  • B. Scheiner, Förderung einer Kongressreise (RWS2019), Deutscher Akademischer Austauschdienst, 2019. [Bibtex]
    @prize{scheiner_prize_2019,
    author = {Scheiner, Benedict},
    booktitle = {Deutscher Akademischer Austauschdienst},
    cris = {scheiner_prize_2019},
    year = {2019},
    title = {Förderung einer Kongressreise (RWS2019)},
    type = {20773-Kleiner Preis},
    }
  • M. Frank, Förderung einer Kongressreise (RWS2019), Deutscher Akademischer Austauschdienst, 2019. [Bibtex]
    @prize{frank_prize_2019,
    author = {Frank, Martin},
    booktitle = {Deutscher Akademischer Austauschdienst},
    cris = {frank_prize_2019},
    year = {2019},
    title = {Förderung einer Kongressreise (RWS2019)},
    type = {20773-Kleiner Preis},
    }

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All Awards...

Most recent publications

  • 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 International Microwave Symposium 2019, Boston, Massachusetts, USA, 2019 (to be published). [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 = {International Microwave Symposium 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/210771629},
    year = {2019},
    month = {08},
    day = {02},
    eventdate = {2019-06-02/2019-02-07},
    faupublication = {yes},
    keywords = {radar; automotive; FMCW; chirp-sequence; time-frequency analysis},
    note = {unpublished},
    peerreviewed = {unknown},
    title = {In-Situ Time-Frequency Analysis of the 77 GHz Bands using a Commercial Chirp-Sequence Automotive FMCW Radar Sensor},
    type = {Konferenzschrift},
    venue = {Boston, Massachusetts, USA},
    }
  • F. Michler, R. Weigel, and A. Koelpin, "Radar-Based Vital Sign Monitoring" in International Microwave Symposium (IMS), 2019 (to be published). [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}, booktitle = {International Microwave Symposium (IMS)}, cris = {https://cris.fau.de/converis/publicweb/publication/211576389}, year = {2019}, month = {06}, day = {02}, eventdate = {2019-06-02/2019-06-07}, faupublication = {yes}, note = {unpublished}, peerreviewed = {automatic}, title = {Radar-Based Vital Sign Monitoring}, }
  • 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. 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}, }
  • H. Unterweger, J. Kirchner, W. Wicke, A. Ahmadzadeh, D. M. A. 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 (to be published). [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 Mahmoud Ahmed 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}, note = {unpublished}, peerreviewed = {Yes}, title = {Experimental Molecular Communication Testbed Based on Magnetic Nanoparticles in Duct Flow}, type = {Konferenzschrift}, venue = {Kalamata, Greece}, }
  • A. Ali and G. Fischer, "The Phase Noise and Clock Synchronous Carrier Frequency Offset based RF Fingerprinting for the Fake Base Station Detection" in The Phase Noise and Clock Synchronous Carrier Frequency Offset based RF Fingerprinting for the Fake Base Station Detection, Cocoa Beach, Florida, USA, 2019 (to be published). [Bibtex]
    @inproceedings{ali2019,
    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}, booktitle = {The Phase Noise and Clock Synchronous Carrier Frequency Offset based RF Fingerprinting for the Fake Base Station Detection}, cris = {https://cris.fau.de/converis/publicweb/publication/214072970}, year = {2019}, month = {04}, day = {08}, eventdate = {2019-04-08/2019-04-09}, eventtitle = {2019 IEEE 20th Wireless and Microwave Technology Conference (WAMICON) - WAMICON}, faupublication = {yes}, keywords = {phase noise; carrier frequency offset; RF Fingerprinting; fake base station; software defined radio; carrier frequency stability; hardware impairments; physical layer security}, note = {unpublished}, peerreviewed = {automatic}, title = {The Phase Noise and Clock Synchronous Carrier Frequency Offset based RF Fingerprinting for the Fake Base Station Detection}, type = {Konferenzschrift}, venue = {Cocoa Beach, Florida, 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, 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}, }
  • 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, Ingoif and Weigel, Robert},
    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},
    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},
    volume = {19},
    }
  • J. Fuchs, R. Weigel, and M. Gardill, "Single-Snapshot Direction-of-Arrival Estimation of Multiple Targets using a Multi-Layer Perceptron" in International Conference on Microwaves for Intelligent Mobility, Detroit, MI, 2019 (to be published). [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 = {International Conference on Microwaves for Intelligent Mobility},
    cris = {https://cris.fau.de/converis/publicweb/publication/211247235},
    year = {2019},
    month = {04},
    day = {15},
    eventdate = {2019-04-15/2019-04-16},
    faupublication = {yes},
    keywords = {Automotive Radar,Direction-of-Arrival Estimation,Neural Network,Multi-Layer Perceptron},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Single-Snapshot Direction-of-Arrival Estimation of Multiple Targets using a Multi-Layer Perceptron},
    venue = {Detroit, MI},
    }
  • 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, 2019. [DOI] [Bibtex]
    @article{grebenstein2019,
    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 lightemitting 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 trainingbased 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}, cris = {https://cris.fau.de/converis/publicweb/publication/205157325}, year = {2019}, month = {04}, day = {15}, doi = {10.1109/TNB.2018.2870910}, faupublication = {yes}, issn = {1536-1241}, journaltitle = {IEEE Transactions on Nanobioscience}, keywords = {Diffusive molecular communications; experimental testbed; statistical modeling; E. coli bacteria; light-driven proton pump}, 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}, }
  • 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}, }
  • 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, pp. 1-4, 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 = {08},
    doi = {10.1109/LAWP.2019.2903338},
    faupublication = {yes},
    issn = {1536-1225},
    journaltitle = {IEEE Antennas and Wireless Propagation Letters},
    pages = {1--4},
    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},
    }
  • 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. 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, 2019 (to be published). [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}, 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)}, note = {unpublished}, peerreviewed = {automatic}, title = {A High Precision Reconfigureable Bistatic Interferometric Radar with Integrated Six-port Receiver at 60 GHz}, venue = {Stuttgart}, }
  • M. Frank, F. Lurz, R. Weigel, and A. Koelpin, "Low-cost Transmitarray Antenna Designs with +/-70° Beam Steering Range in V-Band" in German Microwave Conference (GeMiC) 2019, Stuttgart, 2019 (to be published). [Bibtex]
    @inproceedings{frank2019a,
    author = {Frank, Martin and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {German Microwave Conference (GeMiC) 2019},
    cris = {https://cris.fau.de/converis/publicweb/publication/208937734},
    year = {2019},
    month = {03},
    day = {25},
    eventdate = {2019-03-25/2019-03-27},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {Yes},
    title = {Low-cost Transmitarray Antenna Designs with +/-70° Beam Steering Range in V-Band},
    type = {Konferenzschrift},
    venue = {Stuttgart},
    }
  • 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}, }
  • 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, 2019. [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 = {2019}, month = {02}, 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}, }
  • 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, 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},
    peerreviewed = {unknown},
    title = {Compact Low-cost Substrate Integrated Waveguide Fed Antenna for 122 GHz Radar Applications},
    type = {Letter},
    }
  • S. Ripperger, L. Günther, H. Wieser, N. Duda, M. Hierold, B. Cassens, R. Kapitza, A. Koelpin, and F. Mayer, "Proximity sensors reveal social information transfer in maternity colonies of Common noctule bats", Biology Letters, 2019. [DOI] [Bibtex]
    @article{ripperger2019,
    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},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/204688700},
    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 reveal social information transfer in maternity colonies of Common noctule bats},
    type = {Letter},
    }

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All Publications...

Most recent patents

  • F. Lurz, S. Lindner, A. Koelpin, G. Sept-Enzel, P. Dingler, and E. Halder, Elektrisches Messsystem zur Frequenzmessung und Erkennung von Störsignalen und Betriebsverfahren hierfür, 2016. [Bibtex]
    @patent{lurz_patent_2016,
    author = {Lurz, Fabian and Lindner, Stefan and Koelpin, Alexander and Sept-Enzel, Gerold and Dingler, Peter and Halder, Ernst},
    cris = {lurz_patent_2016},
    year = {2016},
    month = {10},
    day = {13},
    number = {DE 102016119562 B3},
    title = {Elektrisches Messsystem zur Frequenzmessung und Erkennung von Störsignalen und Betriebsverfahren hierfür},
    type = {patent},
    }
  • M. Trautmann, B. Sanftl, A. Koelpin, T. Heckel, L. Frey, S. Ditze, A. Endruschat, C. Joffe, A. Rosskopf, and T. Schriefer, System zur drahtlosen Übertragung von Energie und Daten, 2016. [Bibtex]
    @patent{trautmann_patent_2016,
    abstract = {Die Erfindung betrifft ein System zur drahtlosen Übertragung von Energie und Daten, bei dem mindestens zwei in einem Abstand zueinander angeordnete Spulen oder elektrische Leiterbahnen für die Übertragung von Energie vorhanden sind. Dabei ist jeweils mindestens eine elektrische Spule oder elektrische Leiterbahn zur Übertragung von Energie und/oder mindestens eine elektrische Spule oder elektrische Leiterbahn zur Übertragung von Daten an jeweils eine elektrische Wechselspannungsquelle angeschlossen. Dabei ist mindestens eine elektrische Wechselspannungsquelle modulierbar. Die elektrischen Spulen oder elektrischen Leiterbahnen zur Übertragung von Daten sind mit elektrischer Spannung mit einer Frequenz, die kleiner als die Frequenz mit der eine elektrische Spannung zur Übertragung von Energie mittels der elektrischen Spulen oder elektrischen Leiterbahnen zur Übertragung von Energie eingesetzt ist, betrieben.},
    author = {Trautmann, Martin and Sanftl, Benedikt and Koelpin, Alexander and Heckel, Thomas and Frey, Lothar and Ditze, Stefan and Endruschat, Achim and Joffe, Christopher and Rosskopf, Andreas and Schriefer, Thomas},
    cris = {trautmann_patent_2016},
    year = {2016},
    month = {09},
    day = {29},
    keywords = {Inductive Power Transfer},
    number = {102016206767.2},
    title = {System zur drahtlosen Übertragung von Energie und Daten},
    type = {patent},
    }

COPYRIGHT NOTICE: Copyright and all rights of the material above are retained by authors or by other copyright holders. All persons copying this information are expected to adhere to the terms and constraints invoked by the appropriate copyright. The material may not be reposted without the explicit permission of the copyright holder.

COPYRIGHT NOTICE FOR IEEE PUBLICATIONS: © IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.

COPYRIGHT NOTICE FOR EUMA PUBLICATIONS: © EUMA. Personal use of this material is permitted. Permission from European Microwave Association(EUMA) must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.


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