Staff

M. Sc. Stefan Erhardt

Contact

  • Mail:
  • Phone: 09131/85-25023
  • Fax: Neu:09131/85-28730
  • Room: 01.178 B
  • Neu: Wetterkreuz 15
    91058 Erlangen

About Stefan Erhardt

Curriculum Vitae

Stefan Erhardt finished his studies on Electronics and Communications Engineering in July 2014. Since October 2014 he is a research assistant at the Institute for Electronics Engineering.

In his main project he develops an ultra-low power localization system for the use on bats.

As a side project he helps in the development of circuiTikZ, a LaTeX package for drawing schematics. Furthermore, he founded the project OpenTopoMap in 2012, a topographic map based on OpenStreetMap and SRTM data. As a radio amateur he is mainly interested in digital modes and low bit rate voice codecs.

Previous Topics

  • Mobile communications
  • Public authorities radio systems
  • Software defined radio
  • Ultra-low power localization systems
  • Development on ARM Cortex architectures
  • Integrated microwave circuit design up to 61 GHz

Bachelor/Master thesis

Interesting topics for Bachelor and master thesis always evolve from our current research topics. Have a look at my German page to see a list of so far completed thesis supervised by me.

Lectures Summer term 2018

Awards

  • S. Erhardt, Leo-Brandt-Preis 2015, Deutsche Gesellschaft für Ortung und Navigation e.V., 2015. [Bibtex]
    @prize{erhardt_prize_2015,
    abstract = {Entwicklung und Aufbau von Teilkomponenten für ein 61 GHz ISM-Band Radarsystem in Substrate Integrated Waveguide-Technologie},
    author = {Erhardt, Stefan},
    booktitle = {Deutsche Gesellschaft für Ortung und Navigation e.V.},
    cris = {erhardt_prize_2015},
    year = {2015},
    month = {07},
    day = {07},
    title = {Leo-Brandt-Preis 2015},
    type = {20773-Kleiner Preis},
    }

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.

Publications

2018

  • S. Erhardt, B. Gäde, A. Koelpin, and R. Weigel, "Enhanced GSM Broadcast Receiver using the Phase Output of a Sub-GHz Transceiver" in European Microwave Conference, Madrid, 2018 (to be published). [Bibtex]
    @inproceedings{erhardt2018a,
    author = {Erhardt, Stefan and Gäde, Bernhard and Koelpin, Alexander and Weigel, Robert},
    booktitle = {European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/200219991},
    year = {2018},
    month = {09},
    day = {25},
    eventdate = {2018-09-25/2018-09-27},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Enhanced GSM Broadcast Receiver using the Phase Output of a Sub-GHz Transceiver},
    type = {Konferenzschrift},
    venue = {Madrid},
    }
  • [DOI] 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. [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},
    }
  • [DOI] 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, USA, 2018, pp. 18-20. [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, USA},
    }

2017

  • [DOI] 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. [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},
    }
  • [DOI] 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, 2017. [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},
    }
  • [DOI] 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. [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},
    }

2016

  • [DOI] 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. [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},
    }
  • [DOI] 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, 2016, pp. 165-168. [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},
    }

2015

  • [DOI] S. Mann, S. Erhardt, S. Lindner, F. Lurz, S. Linz, F. Barbon, R. Weigel, and A. Koelpin, "Diode Detector Design for 61 GHz Substrate Integrated Waveguide Six-Port Radar Systems" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), San Diego, CA, USA, 2015, pp. 44-46. [Bibtex]
    @inproceedings{mann2015,
    abstract = {Radar sensors play a key role in today’s industrial automation. Besides high accuracy, modern radar sensors have to feature high precision as well as challenging update rates. Six-Port wave correlators enable high phase resolution at high frequencies and therefore a high accuracy in radar applications. A Schottky diode detector applied to a substrate integrated waveguide (SIW) Six-Port is presented and measured. Furthermore, a displacement measurement using the SIW structure is performed.},
    author = {Mann, Sebastian and Erhardt, Stefan and Lindner, Stefan and Lurz, Fabian and Linz, Sarah and Barbon, Francesco 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/122822964},
    year = {2015},
    month = {01},
    day = {25},
    doi = {10.1109/WISNET.2015.7127415},
    eventdate = {2015-01-25/2015-01-28},
    faupublication = {yes},
    keywords = {Detector; interferometer,; millimeter-wave; Six-Port; RADAR; phase measurement},
    pages = {44--46},
    peerreviewed = {Yes},
    title = {Diode Detector Design for 61 GHz Substrate Integrated Waveguide Six-Port Radar Systems},
    venue = {San Diego, CA, USA},
    }

2014

  • S. Erhardt, "Entwicklung und Aufbau von Teilkomponenten für ein 61 GHz ISM-Band Radarsystem in Substrate Integrated Waveguide-Technologie," Masterarbeit , FAU Erlangen-Nürnberg, 2014. [Bibtex]
    @thesis{erhardt2014,
    author = {Erhardt, Stefan},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/109785324},
    year = {2014},
    month = {07},
    entrysubtype = {Masterarbeit},
    faupublication = {yes},
    keywords = {Substrate Integrated Waveguide; Radar; 61 GHz; ISM-Band},
    peerreviewed = {No},
    title = {Entwicklung und Aufbau von Teilkomponenten für ein 61 GHz ISM-Band Radarsystem in Substrate Integrated Waveguide-Technologie},
    type = {Masterarbeit},
    }

2011

  • S. Erhardt, "Implementierung und Evaluierung eines drahtlosen TDOA-Ortungssystems," Bachelorarbeit , FAU Erlangen-Nürnberg, 2011. [Bibtex]
    @thesis{erhardt2011,
    author = {Erhardt, Stefan},
    institution = {FAU Erlangen-Nürnberg},
    cris = {https://cris.fau.de/converis/publicweb/publication/109088144},
    year = {2011},
    month = {05},
    entrysubtype = {Bachelorarbeit},
    faupublication = {yes},
    keywords = {TDOA; Localization; Hardware; GSM},
    peerreviewed = {No},
    title = {Implementierung und Evaluierung eines drahtlosen TDOA-Ortungssystems},
    type = {Bachelorarbeit},
    }

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.