Mitarbeiter

Dr.-Ing. Markus Gardill

Kontakt

Über Markus Gardill

Lebenslauf

seit 01/2015 Akad. Rat
seit 04/2014 Gruppenleiter Radio Communication Technology
10/2010 - 12/2014 Wissenschaftlicher Mitarbeiter

Arbeitsgebiete

  • Antennen und Antennenarrays
  • Kommunikationssysteme
  • Software-Defined Radio
  • Signal Processing

Abschlussarbeiten

Bitte melden, falls Interesse an einem der genannten Arbeitsgebiete besteht.

Lehrveranstaltungen Sommersemester 2019

Preise & Auszeichnungen

  • M. Gardill, IEEE Distinguished Microwave Lecturer (2018 - 2020), IEEE Microwave Theory and Techniques Society, 2017. [Bibtex]
    @prize{gardill_prize_2017,
    abstract = {IEEE Distinguished Microwave Lecturer (2018 - 2020) for „Automotive Radar – A Signal Processing Perspective on Current Technology and Future Systems”},
    author = {Gardill, Markus},
    booktitle = {IEEE Microwave Theory and Techniques Society},
    cris = {gardill_prize_2017},
    year = {2017},
    title = {IEEE Distinguished Microwave Lecturer (2018 - 2020)},
    type = {20773-Kleiner Preis},
    }
  • M. Gardill, Förderpreis der ITG 2016, Informationstechnische Gesellschaft (ITG), 2016. [Bibtex]
    @prize{gardill_prize_2016,
    abstract = {Für die Dissertation zum Thema: "Characterization and Design of Small Array Antennas for Direction-Of-Arrival Estimation for Ultra-Wideband Industrial {FMCW} Radar Systems"},
    author = {Gardill, Markus},
    booktitle = {Informationstechnische Gesellschaft (ITG)},
    cris = {gardill_prize_2016},
    year = {2016},
    title = {Förderpreis der ITG 2016},
    type = {20773-Kleiner Preis},
    }
  • M. Gardill, 5th Place Winner Student Paper Competition, Applied Computational Electromagnetics Society Annual Conference, 2013. [Bibtex]
    @prize{gardill_prize_2013,
    abstract = {Receiving Mode Simulations for Ultra-Wideband Characterization of Small Antenna Arrays and a Novel Look on Mutual Coupling},
    author = {Gardill, Markus},
    booktitle = {Applied Computational Electromagnetics Society Annual Conference},
    cris = {gardill_prize_2013},
    year = {2013},
    month = {03},
    day = {28},
    title = {5th Place Winner Student Paper Competition},
    type = {20773-Kleiner Preis},
    }
  • M. Gardill, SEW Eurodrive Studienpreis 2011, SEW Eurodrive, 2012. [Bibtex]
    @prize{gardill_prize_2012,
    abstract = {In Anerkennung seiner hervorragenden Diplomarbeit mit dem Thema: An UMTS Jammer Triggering User Equipment Inter-Rat Cell Reselection},
    author = {Gardill, Markus},
    booktitle = {SEW Eurodrive},
    cris = {gardill_prize_2012},
    year = {2012},
    month = {05},
    day = {03},
    title = {SEW Eurodrive Studienpreis 2011},
    type = {20773-Kleiner Preis},
    }
  • M. Gardill, EADS Argus Award, EADS / Cassidian Electronics, 2010. [Bibtex]
    @prize{gardill_prize_2010,
    abstract = {Wegen seiner Diplomarbeit: An UMTS Jammer Triggering User Equipment Inter-Rat Cell Reselection},
    author = {Gardill, Markus},
    booktitle = {EADS / Cassidian Electronics},
    cris = {gardill_prize_2010},
    year = {2010},
    month = {10},
    day = {07},
    title = {EADS Argus Award},
    type = {20773-Kleiner Preis},
    }

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Publikationen

2019

  • 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},
    }
  • 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},
    }
  • 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 WiSNet Wireless Sensors and Sensor Networks, Orlando, Florida, USA, 2019 (to be published). [Bibtex]
    @inproceedings{fuchs2019,
    author = {Fuchs, Jonas and Weigel, Robert and Gardill, Markus},
    booktitle = {WiSNet Wireless Sensors and Sensor Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/203918515},
    year = {2019},
    month = {01},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    note = {unpublished},
    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},
    }

2018

  • 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 IEEE International Workshop on Machine Learning for Signal Processing 2018, Aalborg, Denmark, 2018. [Bibtex]
    @inproceedings{gardill2018,
    author = {Gardill, Markus and Fuchs, Jonas and Frank, Christian and Weigel, Robert},
    language = {English},
    booktitle = {IEEE International Workshop on Machine Learning for Signal Processing 2018},
    cris = {https://cris.fau.de/converis/publicweb/publication/200736205},
    year = {2018},
    month = {10},
    day = {17},
    eventdate = {2018-09-17/2018-09-20},
    faupublication = {yes},
    keywords = {Automotive Radar; Direction-of-Arrival Estimation; Neural Network; Multi-Layer Perceptron},
    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},
    }

2017

  • 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},
    }

2016

  • 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. 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},
    }

2015

  • 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},
    }
  • 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},
    }
  • 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},
    }
  • 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},
    }

2014

  • M. Hamouda, G. A. Guarin Aristizabal, M. Gardill, B. Lämmle, R. Weigel, D. Kissinger, and T. Ußmüller, "A clock synchronization for M-sequence-based ultra-wideband systems", IEEE Transactions on Microwave Theory and Techniques, vol. 62, iss. 12, pp. 3549-3561, 2014. [DOI] [Bibtex]
    @article{hamouda2014c,
    author = {Hamouda, Mohamed and Guarin Aristizabal, Gustavo Adolfo and Gardill, Markus and Lämmle, Benjamin and Weigel, Robert and Kissinger, Dietmar and Ußmüller, Thomas},
    publisher = {IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/122776104},
    year = {2014},
    month = {12},
    doi = {10.1109/TMTT.2014.2364676},
    faupublication = {yes},
    issn = {0018-9480},
    journaltitle = {IEEE Transactions on Microwave Theory and Techniques},
    number = {12},
    pages = {3549--3561},
    peerreviewed = {Yes},
    shortjournal = {IEEE T MICROW THEORY},
    title = {A clock synchronization for M-sequence-based ultra-wideband systems},
    volume = {62},
    }
  • M. Gardill, D. Kay, R. Weigel, and A. Koelpin, "Numerical Investigations on the Quasi-Stationary Response of Antennas to Wideband LFMCW Excitation" in European Signal Processing Conference (EUSIPCO), Lissabon, Portugal, 2014, pp. 969-973. [Bibtex]
    @inproceedings{gardill2014a,
    abstract = {In this contribution, we numerically investigate if the quasi-stationary response is a valid approximation for the response of antennas excited by wideband linear-frequency modulated continuous waveforms. We give results for two idealized example systems, showing how the validity of the quasi-stationary response is dependent on the system's resonant behavior, and that the error between exact output and quasi-stationary response is approximately linearly dependent on the sweeprate of the linear-frequency modulated excitation. We then conduct our simulations for a realistic wideband radar system operating from 5 GHz to 8 GHz, and using impulse responses extracted from electromagnetic simulations of a dipole and a biconical antenna.},
    author = {Gardill, Markus and Kay, D. and Weigel, Robert and Koelpin, Alexander},
    booktitle = {European Signal Processing Conference (EUSIPCO)},
    cris = {https://cris.fau.de/converis/publicweb/publication/122799204},
    year = {2014},
    month = {09},
    day = {01},
    eventdate = {2014-09-01/2014-09-05},
    faupublication = {yes},
    pages = {969--973},
    peerreviewed = {Yes},
    title = {Numerical Investigations on the Quasi-Stationary Response of Antennas to Wideband LFMCW Excitation},
    venue = {Lissabon, Portugal},
    }
  • M. Gardill, R. Weigel, and A. Koelpin, "Ultra-Wideband Small Modular Array Antenna Based on Column-Coupled Vivaldi Subarrays" in European Conference on Antennas and Propagation, Den Haag, Netherlands, 2014, pp. 3629-3633. [DOI] [Bibtex]
    @inproceedings{gardill2014,
    abstract = {In this contribution an ultra-wideband small array antenna for direction-of-arrival (DOA) estimation in low-cost industrial radar applications operating in the frequency range from 5 GHz - 8 GHz is designed by using column-coupled Vivaldi subarray modules. Compared to traditional ultra-wideband antenna arrays consisting of inherently wideband antenna elements, the proposed design procedure utilizes mutual coupling (MC) across the antenna elements to reduce the antenna element size, to simultaneously improve the subarray module return loss, and to allow for relatively small element spacing in the plane of DOA estimation. In contrast to state-of-the-art tightly-coupled ultra-wideband antenna arrays consisting of a large number of very small array elements on a regular grid-spacing, the proposed solution only relies on MC across four antenna elements along each array column. It hence provides UWB characteristics with a small number of antenna elements, it can easily be interfaced with a low-cost 4-RX channel radar fronted and allows for arbitrary linear array geometries such as non-uniform element spacing optimized for DOA estimation. We characterize the array and discuss MC aspects and DOA estimation results based on measured array data.},
    author = {Gardill, Markus and Weigel, Robert and Koelpin, Alexander},
    booktitle = {European Conference on Antennas and Propagation},
    cris = {https://cris.fau.de/converis/publicweb/publication/106951284},
    year = {2014},
    month = {04},
    day = {06},
    doi = {10.1109/EUCAP.2014.6902616},
    eventdate = {2014-04-06/2014-04-11},
    faupublication = {yes},
    pages = {3629--3633},
    peerreviewed = {Yes},
    title = {Ultra-Wideband Small Modular Array Antenna Based on Column-Coupled Vivaldi Subarrays},
    venue = {Den Haag, Netherlands},
    }

2013

  • M. Gardill, K. Finkenzeller, W. Hinz, G. Fischer, R. Weigel, and A. Koelpin, "A Review and Comparative Study of On- and Off-Body Performance of Platform-Tolerant UHF RFID Tag Antennas" in 8th International Conference on Body Area Networks, Boston, MA, USA, 2013. [DOI] [Bibtex]
    @inproceedings{gardill2013f,
    abstract = {This paper addresses the remote identifying of human subjects by means of UHF RFID tags. In particular, we provide a comprehensive review of recent approaches in the design of compact, platform-tolerant UHF RFID antennas for on- as well as off-body applications. We first categorize previously published antenna designs and interrelate the various approaches. We then provide detailed simulation results for several selected design approaches, and compare the performance of the proposed antenna structures when used in free-space, placed in proximity to a homogenous phantom half-space model, and when used on or in proximity to a layered elliptical body model. We provide a comparative study by evaluating all approaches using the same figure of merits, which are the power transfer and the estimated read range, evaluated in exactly the same simualtion environment for all approaches.},
    author = {Gardill, Markus and Finkenzeller, Klaus and Hinz, Walter and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    publisher = {ICST},
    booktitle = {8th International Conference on Body Area Networks},
    cris = {https://cris.fau.de/converis/publicweb/publication/122147784},
    year = {2013},
    month = {10},
    doi = {10.4108/ICST.BODYNETS.2013.253614},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A Review and Comparative Study of On- and Off-Body Performance of Platform-Tolerant UHF RFID Tag Antennas},
    venue = {Boston, MA, USA},
    }
  • F. Oesterle, M. Gardill, R. Weigel, and A. Koelpin, "Evaluation of a Microwave Based Contact-Free Testing Method for Mechanical Sensitivity Analysis of MEMS for Inline Integration of On-Wafer Measurements" in Microwave Conference (EuMC), 2013 European, Nuremberg, Germany, 2013. [Bibtex]
    @inproceedings{oesterle2013a,
    abstract = {Testing of Micro Electro Mechanical Systems is a key issue in high volume batch manufacturing. Deviating process parameters influence the nominal intrinsic stress level of the mechanical components, leading to a variation of the specified sensitivity, hence the system functionality. Focusing on a short test time, inline integration, and contactless excitation and analysis methods, establishing an electrical test for the required sensitivity within the mechanical domain is challenging. Depending on the design and functionality of the specific MEMS device, optical interferometry methods, Impedance or Network Analyzers or even final system level tests are implemented nowadays. This paper presents an alternative contactless testing method for sensitivity analysis of MEMS using microwave reflectometry. Proving the enormous potential of the method for inline integration, measurement results for varying chuck thickness and frequencies within the W-band are shown and evaluated, using a dedicated test setup for on-chip or on-wafer measurements.},
    author = {Oesterle, Florian and Gardill, Markus and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Microwave Conference (EuMC), 2013 European},
    cris = {https://cris.fau.de/converis/publicweb/publication/107984404},
    year = {2013},
    month = {10},
    day = {06},
    eventdate = {2013-10-06/2013-10-10},
    faupublication = {yes},
    keywords = {MEMS; Mechanical Resonance; Mechanical Sensitivity; Contactless Testing; Microwave Reflectometry; Deflection Measurement; W-band; Microphone; Inline Integration},
    peerreviewed = {Yes},
    title = {Evaluation of a Microwave Based Contact-Free Testing Method for Mechanical Sensitivity Analysis of MEMS for Inline Integration of On-Wafer Measurements},
    venue = {Nuremberg, Germany},
    }
  • M. Gardill, J. Schneider, F. Oesterle, G. Fischer, R. Weigel, and A. Koelpin, "Ultra-Wideband Small Antenna Subarray Module with Narrow Elevation Pattern" in IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications, Torino, Italy, 2013. [DOI] [Bibtex]
    @inproceedings{gardill2013e,
    abstract = {We propose an integrated small ultra-wideband antenna subarray module with narrow elevation pattern for future use in antenna arrays providing spatial processing capabilities such as Direction-Of-Arrival estimation in the azimuth plane, in the frequency range from 5 GHz to 8 GHz. The proposed subarray design is based on four mutually coupled Vivaldi antennas stacked on a common substrate in the E-Plane, with an element distance of delem 0;high=2. We optimize the antenna element in an infinite unit-cell stick array configuration and show that - in contrast to general believe - the truncation e ects when reducing the infinite stick-array to only four elements even reduce the total scan element reflection for broadside excitation. In addition, in contrast to most previously published E-Plane Vivaldi arrays, our design does not need a parallel-plate to microstrip balun at the feed point of each antenna element to realize an integrated planar feed network. Instead we use a novel ultra-wideband and geometrically small hybrid ring coupler to realize the array feed network directly in parallel plate technology, resulting in a low-cost, two-layer, single printed-circuit board integrated subarray module with narrow elevation pattern, operating from 5 GHz to 8 GHz.},
    author = {Gardill, Markus and Schneider, J. and Oesterle, Florian and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE-APS Topical Conference on Antennas and Propagation in Wireless Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/123861144},
    year = {2013},
    month = {09},
    day = {09},
    doi = {10.1109/APWC.2013.6624934},
    eventdate = {2013-09-09/2013-09-13},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Ultra-Wideband Small Antenna Subarray Module with Narrow Elevation Pattern},
    venue = {Torino, Italy},
    }
  • M. Gardill, G. Fischer, R. Weigel, and A. Koelpin, "Design of an Ultra-Wideband Monocone Circular Antenna Array for Vehicle-Integrated Industrial Local Positioning Applications" in European Conference on Antennas and Propagation, Gothenburg, Sweden, 2013. [Bibtex]
    @inproceedings{gardill2013c,
    abstract = {We present the design of a vehicle-roof-integrated wideband circular antenna array for industrial local positioning applications. The array is designed for Direction-of-Arrival estimation in a novel ultra-wideband secondary FMCW radar system operating in the 5 GHz - 8 GHz frequency range. A novel size-reduced, mechanically robust, and application-ready monocone antenna with more than 120 % impedance bandwidth is proposed as basis element for array design, which allows for arbitrary array geometries based on a =2 grid spacing. We show measurement results and the characterization of a four-element circular array.},
    author = {Gardill, Markus and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    booktitle = {European Conference on Antennas and Propagation},
    cris = {https://cris.fau.de/converis/publicweb/publication/121569184},
    year = {2013},
    month = {04},
    day = {08},
    eventdate = {2013-04-08/2013-04-12},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Design of an Ultra-Wideband Monocone Circular Antenna Array for Vehicle-Integrated Industrial Local Positioning Applications},
    venue = {Gothenburg, Sweden},
    }
  • M. Gardill, G. Fischer, R. Weigel, and A. Koelpin, "Receiving Mode CST MWS – Matlab Co-Simulations for Time and Frequency Domain UWB Small Antenna Array Characterization" in CST European User Group Meeting 2013, Stuttgart, Germany, 2013. [Bibtex]
    @inproceedings{gardill2013d,
    abstract = {Using current simulation technology the simulation setup for a small antenna array (no Unit-Cell approach) generally is as follows: the complete antenna array structure is modeled in CST MWS and a port is assigned to each antenna element. The simulation can then be performed by either exciting a single element only while all others are terminated with their port reference impedance, which would e.g. yield the active element pattern, the embedded element impedance, and the TX mode element coupling S-Parameters. Alternatively the simulation can be performed using a simultaneous excitation of all ports, with a predefined phase and amplitude distribution. This yields the pattern of the complete array for the defined excitations as well as the scan impedance for every element. However, both approaches lead to a description of the antenna array in transmit mode only, but it is a well-known fact that the TX mode characteristics differ from the RX mode characteristics significantly. In our contribution we propose a Matlab – CST Co simulation framework for simulating antenna arrays in receive mode. Therefore, we developed a Matlab function which excites the complete structure using plane waves impinging on the array from various directions of interest, records the output signals of all ports as well as the Plane wave signal (using ResultReaderDLL) and finally postprocesses the outputs to get state-of-the-art frequency and time-domain characteristics for UWB antennas and antenna arrays. In the presentation we give an introduction to the problem of UWB receiving antenna array characterization, we introduce the state-of-the-art frequency and time-domain figures of merit for UWB antennas and antenna arrays, we introduce our simulation framework, and we discuss simulation results. The simulation framework Matlab code will be available to interested users for free.},
    author = {Gardill, Markus and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    booktitle = {CST European User Group Meeting 2013},
    cris = {https://cris.fau.de/converis/publicweb/publication/106937864},
    year = {2013},
    month = {04},
    day = {23},
    eventdate = {2013-04-23/2013-04-25},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Receiving Mode CST MWS – Matlab Co-Simulations for Time and Frequency Domain UWB Small Antenna Array Characterization},
    type = {Abstract zum Vortrag},
    venue = {Stuttgart, Germany},
    }
  • M. Gardill, G. Fischer, R. Weigel, and A. Koelpin, "Receiving Mode Simulations for Ultra-Wideband Characterization of Small Antenna Arrays and a Novel Look on Mutual Coupling" in Applied Computational Electromagnetics Society Conference, Monterey, CA, USA, 2013. [Bibtex]
    @inproceedings{gardill2013b,
    abstract = {Using conventional commercially available computational electromagnetics (CEM) simulation packages the simulation setup for a small antenna array generally is as follows: the complete antenna array structure is modeled in the simulation tool and the simulation is sequentially performed by exciting each single antenna element while all others are terminated with their port reference impedance. This yields a complete characterization of the array in transmit (TX) mode. However, it is a well-known fact that the TX mode characteristics differ from the receive (RX) mode characteristics significantly and the results obtained from a TX mode simulation do not necessarily capture the RX case. In this contribution we first propose an extended model for characterizing RX mode ultra-wideband (UWB) antenna-arrays, with a novel look on the RX mode coupling phenomena. Based on the theory, we propose our computational framework for accurate simulations of small receiving UWB antenna arrays. We further present simulation results for some exemplary UWB antenna arrays and discuss our novel viewpoint on RX mode array coupling.},
    author = {Gardill, Markus and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Applied Computational Electromagnetics Society Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/120670044},
    year = {2013},
    month = {03},
    day = {24},
    eventdate = {2013-03-24/2013-03-28},
    faupublication = {yes},
    peerreviewed = {No},
    title = {Receiving Mode Simulations for Ultra-Wideband Characterization of Small Antenna Arrays and a Novel Look on Mutual Coupling},
    venue = {Monterey, CA, USA},
    }
  • M. Gardill, G. Fischer, R. Weigel, and A. Koelpin, "Design of a Robust and Low-Cost Monocone Antenna Element for Use in Vehicle Roof-Mounted Antenna Arrays" in IEEE Radio and Wireless Week, Austin, TX, USA, 2013, pp. 112-114. [DOI] [Bibtex]
    @inproceedings{gardill2013a,
    abstract = {We present the design of a wideband monocone antenna element having more than one octave impedance as well as pattern bandwidth. It is optimized for use in vehicle roof-mounted antenna arrays for spatial processing in an ultra-wideband local positioning secondary radar system, operating in the frequency range from 5 GHz to 8 GHz. We focus on a low-cost design, offering mechanical robustness, being ruggedized towards environmental influence, and achieving small physical dimensions using a protective dielectric-encapsulated design. In addition, we suggest a solderless and robust interconnection between coaxial connector and antenna element. The antenna element allows for arbitrary planar array geometries with grid spacing at the order of the lowest frequency of operation and a simple integration in any vehicle with a metallic roof.},
    author = {Gardill, Markus and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Radio and Wireless Week},
    cris = {https://cris.fau.de/converis/publicweb/publication/123393644},
    year = {2013},
    month = {01},
    day = {20},
    doi = {10.1109/RWS.2013.6486658},
    eventdate = {2013-01-20/2013-01-23},
    faupublication = {yes},
    pages = {112--114},
    peerreviewed = {Yes},
    title = {Design of a Robust and Low-Cost Monocone Antenna Element for Use in Vehicle Roof-Mounted Antenna Arrays},
    venue = {Austin, TX, USA},
    }
  • M. Gardill, G. Fischer, R. Weigel, and A. Koelpin, "Single-Element Based Ultra-Wideband Antenna Array Concepts for Wireless High-Precision 2D Local Positioning", Advances in Radio Science : Kleinheubacher Berichte, vol. 11, 2013. [DOI] [Bibtex]
    @article{gardill2013,
    abstract = {We generally categorize the approaches for ultrawideband antenna array design, and consequently propose simplified concepts for antenna arrays for a high-precision, ultra-wideband FMCW radar 2D local positioning system to obtain robustness against multi path interference, perform angle of arrival analysis, as well as instantaneous heading estimation. We focus on low-cost and mechanical robust, industrial-application ready antennas. The antenna arrays are optimized for operation in the 5 GHz to 8 GHz frequency range and are designed towards supporting full omnidirectional 360 as well as partial half-plane direction of arrival estimation. Two different concepts for vehicle- as well as wall-mounted antenna array systems are proposed and discussed. We propose a wideband unidirectional bow-tie antenna array element having 97% impedance and 37% pattern bandwidth and a robust vehicle mounted omnidirectional antenna element having more than 85% impedance and pattern bandwidth.},
    author = {Gardill, Markus and Fischer, Georg and Weigel, Robert and Koelpin, Alexander},
    publisher = {Copernicus},
    cris = {https://cris.fau.de/converis/publicweb/publication/120672684},
    year = {2013},
    doi = {10.5194/ARS-11-297-2013},
    faupublication = {yes},
    issn = {1684-9965},
    journaltitle = {Advances in Radio Science : Kleinheubacher Berichte},
    peerreviewed = {Yes},
    title = {Single-Element Based Ultra-Wideband Antenna Array Concepts for Wireless High-Precision 2D Local Positioning},
    volume = {11},
    }

2012

  • M. Gardill, R. Weigel, and A. Koelpin, "A Wideband Unidirectional Antenna Array Element With Stable Radiation Pattern" in IEEE Topical Conference on Antennas and Propagation in Wireless Communications, Cape Town, South Africa, 2012. [Bibtex]
    @inproceedings{gardill2012a,
    abstract = {modification of the famous Bow Tie antenna element for wideband Direction-Of-Arrival estimation antenna arrays is designed. A constant input impedance as well as a very stable radiation pattern over a 37% bandwidth from 5.5 GHz to 8 GHz is achieved. In addition the proposed design uses a double layer substrate and hence allows for direct integration of the feed network and analog RF circuitry directly into the antenna array. The particular design is suited for low-cost integration and optimized for a wireless high-precision localization system.},
    author = {Gardill, Markus and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE Topical Conference on Antennas and Propagation in Wireless Communications},
    cris = {https://cris.fau.de/converis/publicweb/publication/107957564},
    year = {2012},
    month = {09},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A Wideband Unidirectional Antenna Array Element With Stable Radiation Pattern},
    venue = {Cape Town, South Africa},
    }
  • S. Zorn, M. Gardill, R. Rose, A. Götz, R. Weigel, and A. Koelpin, "A Smart Jamming System for UMTS/WCDMA Cellular Phone Networks for Search and Rescue Applications" in IEEE MTT-S International Microwave Symposium Digest (MTT), 2012, Montreal, QC, CA, 2012, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{zorn2012,
    abstract = {Recent statistics show an increase in environmental disasters, a fact which is also perceivable to the public as reports of avalanches, earthquakes and landslides mount in media coverage. This paper introduces one part of the I-LOV project, endorsed by the German Federal Ministry of Education and Research. In this project partners from relief organizations, universities and industry investigate enhancements to disaster handling and victim rescue. One possible option is to take advantage of the fact, that a lot of people own a mobile phone today. To locate a person by his or her mobile phone requires to take over the phone by an own Base Transceiver Station (BTS). Jamming all other networks is one option to achieve that. This paper will introduce a new Field Programmable Gate Array (FPGA) based jamming system which disturbs only the absolute necessary parts of the WCDMA spectrum but reliably cuts all connections between mobile stations (MS) and existing BTS. The whole system including the signal generator and the front end will be discussed. Also measurement results will be shown.},
    author = {Zorn, Stefan and Gardill, Markus and Rose, Richard and Götz, Alexander and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE MTT-S International Microwave Symposium Digest (MTT), 2012},
    cris = {https://cris.fau.de/converis/publicweb/publication/123373184},
    year = {2012},
    month = {06},
    doi = {10.1109/MWSYM.2012.6257769},
    faupublication = {yes},
    keywords = {GSM; Jamming; Mobile communication; Mobile handsets; Multiaccess communication; Radio frequency; Spread spectrum communication; FPGA},
    pages = {1--3},
    peerreviewed = {unknown},
    title = {A Smart Jamming System for UMTS/WCDMA Cellular Phone Networks for Search and Rescue Applications},
    venue = {Montreal, QC, CA},
    }
  • M. Maser, M. Gardill, P. Gulden, G. Fischer, R. Weigel, and T. Ußmüller, "Local Positioning mit einem integrierten Breitband-FMCW System" in Electrical and Electronic Engineering for Communication, EEEfCOM 2012, Ulm, Germany, 2012. [Bibtex]
    @inproceedings{maser2012a,
    author = {Maser, Matthias and Gardill, Markus and Gulden, Peter and Fischer, Georg and Weigel, Robert and Ußmüller, Thomas},
    publisher = {GEROTRON COMMUNICATION GmbH},
    booktitle = {Electrical and Electronic Engineering for Communication, EEEfCOM 2012},
    cris = {https://cris.fau.de/converis/publicweb/publication/118776284},
    year = {2012},
    month = {05},
    faupublication = {yes},
    keywords = {Local Positioning},
    peerreviewed = {unknown},
    title = {Local Positioning mit einem integrierten Breitband-FMCW System},
    venue = {Ulm, Germany},
    }

2011

  • M. Gardill, S. Zorn, R. Weigel, and A. Koelpin, "Influencing Cell Reselection of UMTS User Equipment using Interference Injection" in RadCom, Hamburg, Germany, 2011. [Bibtex]
    @inproceedings{gardill2011a,
    author = {Gardill, Markus and Zorn, Stefan and Weigel, Robert and Koelpin, Alexander},
    booktitle = {RadCom},
    cris = {https://cris.fau.de/converis/publicweb/publication/123401344},
    year = {2011},
    month = {04},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Influencing Cell Reselection of UMTS User Equipment using Interference Injection},
    venue = {Hamburg, Germany},
    }
  • M. Gardill, S. Zorn, R. Weigel, and A. Koelpin, "Triggering UMTS user equipment inter-RAT cell reselection using noise jammers" in German Microwave Conference, Darmstadt, Germany, 2011, pp. 1-4. [Bibtex]
    @inproceedings{gardill2011,
    abstract = {In this work a strategy for triggering an interradio access technology cell reselection in UMTS user equipment is proposed. All mobile devices within the effective range of a transmitter radiating a noise-like RF signal on the UMTS downlink frequency bands are forced to leave the UMTS cells and camp on non-UMTS cells, such as e.g., GSM. This allows to use a GSM based localization technique even in areas with UMTS coverage. In contrast to classical RF communication jammers which focus on disrupting the communication link, our exclusive goal is to trigger the inter-RAT cell reselection to GSM. In particular we estimate the necessary jammer RF power by examining the cell reselection procedure running in the user equipment (UE) and using some exemplary geographical scenarios. We use a hardware system to proof the results. Index Terms IEEE Terms 3G mobile communication , GSM , Interference , Jamming , Mobile handsets , Noise , Radio frequency INSPEC Controlled Indexing 3G mobile communication , cellular radio , jamming , radio links , radio transmitters Non Controlled Indexing GSM based localization , RF communication jammer , UMTS cell , UMTS coverage , UMTS downlink frequency band , UMTS user equipment , communication link , geographical scenario , interRAT cell reselection , interradio access technology , jammer RF power , mobile device , noise jammer , noise-like RF signal , transmitter Author Keywords UMTS , cell reselection , jammer References S. Zorn, R. Rose, A. Goetz, and R. Weigel, "A novel technique for mobile phone localization for search and rescue applications," in 2010 International Conference on Indoor Positioning and Indoor Navigation (IPIN), Sep. 2010, pp. 1-4. Abstract |Full Text: PDF (1079KB) User Equipment (UE) procedures in idle mode and procedures for cell reselection in connected mode, 3rd Generation Partnership Project Std. TS 25.304, Rev. 9.0.0, 2009. Physical layer - Measurements (FDD), 3rd Generation Partnership Project Std. TS 25.215, Rev. 9.0.0, 2009. S.-F. Su, The UMTS air-interface in RF engineering: design and operation of UMTS networks. Mcgraw-Hill Professional, 2007. ON THIS PAGE Abstract Index Terms References Brought to you by Universitatsbibliothek Erlangen Nurnberg Your institute subscribes to: IEEE/IET Electronic Library (IEL), VDE VERLAG Conference Proceedings What can I access? Terms of Use},
    author = {Gardill, Markus and Zorn, Stefan and Weigel, Robert and Koelpin, Alexander},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/120044804},
    year = {2011},
    month = {03},
    faupublication = {yes},
    isbn = {9781424492251},
    pages = {1--4},
    peerreviewed = {unknown},
    title = {Triggering UMTS user equipment inter-RAT cell reselection using noise jammers},
    venue = {Darmstadt, Germany},
    }

2009

  • A. Sehr, M. Gardill, and W. Kellermann, "Adapting HMMS of distant-talking asr systems using feature-domain reverberation models" in 17th European Signal Processing Conference, EUSIPCO 2009, Glasgow, UK, 2009, pp. 540-543. [Bibtex]
    @inproceedings{sehr2009,
    abstract = {To capture the dispersive effect of reverberation by Hidden Markov Model (HMM)-based distant-talking speech recognition systems, adapting the means of the current HMM state based on the means of the preceding states has been suggested in [1]. In this contribution, we propose to incorporate the reverberation models of [2] into the adaptation approach to describe the effect of reverberation with higher accuracy. Connected-digit recognition experiments in three different rooms confirm that the suggested more accurate reverberation representation leads to a significant performance increase in all investigated environments. © EURASIP, 2009.},
    author = {Sehr, Armin and Gardill, Markus and Kellermann, Walter},
    booktitle = {17th European Signal Processing Conference, EUSIPCO 2009},
    cris = {https://cris.fau.de/converis/publicweb/publication/119670584},
    year = {2009},
    month = {08},
    day = {24},
    eventdate = {2009-08-24/2009-08-28},
    faupublication = {yes},
    journaltitle = {European Signal Processing Conference},
    pages = {540--543},
    peerreviewed = {Yes},
    title = {Adapting HMMS of distant-talking asr systems using feature-domain reverberation models},
    type = {Report},
    url = {https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84863760759&origin=inward},
    venue = {Glasgow, UK},
    }

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