Mitarbeiter

M. Sc. Fabian Michler (Akad. Rat)

Kontakt

  • E-Mail:
  • Telefon: 09131/85-28847
  • Fax: Neu:09131/85-28730
  • Raum: 01.178 E
  • Neu: Wetterkreuz 15
    91058 Erlangen

Über Fabian Michler

Lebenslauf

Fabian Michler schloss sein Bachelorstudium der Elektrotechnik und Informationstechnik mit Vertiefungsrichtung Nachrichten- und Kommunikationstechnik/Hochfrequenztechnik an der TU Darmstadt im August 2013 ab. Das darauffolgende Masterstudium an der University of Illinois at Urbana-Champaign und der TU Darmstadt beendete er erfolgreich im April 2016. Seit Juni 2016 arbeitet er als wissenschaftlicher Mitarbeiter am Lehrstuhl für Technische Elektrotechnik im Team Circuits, Systems and Hardware Test (CST) an Radarverfahren zur Detektion menschlicher Vitalparameter.

Arbeitsgebiete

  • Radar-Systemdesign (Frontend)
  • Messung von Vitalparametern

Abschlussarbeiten

Aus unseren Forschungsprojekten ergeben sich stets interesannte Themen für Abschlussarbeiten (Bachelor / Master) oder Forschungspraktika in den Bereichen Systemdesign, Schaltungstechnik (analog / digital) sowie Signalverarbeitung. Für weitere Informationen und aktuelle Themen einfach unverbindlich vorbeikommen, E-Mail schreiben oder anrufen!

Lehrveranstaltungen Wintersemester 2018

Lehrveranstaltungen Sommersemester 2019

Preise & Auszeichnungen

  • F. Michler, APMC 2018 Student Travel Grant, Asia-Pacific Microwave Conference, 2018. [Bibtex]
    @prize{michler_prize_2018b,
    author = {Michler, Fabian},
    booktitle = {Asia-Pacific Microwave Conference},
    cris = {michler_prize_2018b},
    year = {2018},
    month = {11},
    day = {06},
    title = {APMC 2018 Student Travel Grant},
    type = {20773-Kleiner Preis},
    }
  • F. Michler, B. Scheiner, and F. Lurz, IEEE MTT-S International Microwave Symposium Student Design Competition First Place Award for "High-Sensitivity Fast-Response Motion Sensing Radar", IEEE Microwave Theory and Techniques Society (MTT-S), 2018. [Bibtex]
    @prize{michler_prize_2018a,
    author = {Michler, Fabian and Scheiner, Benedict and Lurz, Fabian},
    booktitle = {IEEE Microwave Theory and Techniques Society (MTT-S)},
    cris = {michler_prize_2018a},
    year = {2018},
    month = {06},
    day = {12},
    title = {IEEE MTT-S International Microwave Symposium Student Design Competition First Place Award for "High-Sensitivity Fast-Response Motion Sensing Radar"},
    type = {20773-Kleiner Preis},
    }
  • F. Michler, IMS2018 PhD Student Sponsorship, IEEE Microwave Theory and Techniques Society (MTT-S), 2018. [Bibtex]
    @prize{michler_prize_2018,
    author = {Michler, Fabian},
    booktitle = {IEEE Microwave Theory and Techniques Society (MTT-S)},
    cris = {michler_prize_2018},
    year = {2018},
    title = {IMS2018 PhD Student Sponsorship},
    type = {20773-Kleiner Preis},
    }
  • F. Lurz, F. Michler, and B. Scheiner, IEEE MTT-S International Microwave Symposium Student Design Competition First Place Award for "High-Sensitivity Fast-Response Motion Sensing Radar", IEEE Microwave Theory and Techniques Society (MTT-S), 2017. [Bibtex]
    @prize{lurz_prize_2017,
    author = {Lurz, Fabian and Michler, Fabian and Scheiner, Benedict},
    booktitle = {IEEE Microwave Theory and Techniques Society (MTT-S)},
    cris = {lurz_prize_2017},
    year = {2017},
    month = {06},
    day = {08},
    title = {IEEE MTT-S International Microwave Symposium Student Design Competition First Place Award for "High-Sensitivity Fast-Response Motion Sensing Radar"},
    type = {20773-Kleiner Preis},
    }

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Publikationen

2019

  • 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}, }
  • 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}, }
  • E. Hassan, M. Berggren, B. Scheiner, F. Michler, R. Weigel, and F. Lurz, "Design of Planar Microstrip-to-Waveguide Transitions using Topology Optimization" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, 2019 (to be published). [Bibtex]
    @inproceedings{hassan2019,
    abstract = {This paper presents a topology optimization approach to design planar transitions between a microstrip line (MSL) and a rectangular waveguide (RWG) in the K-band. The transition comprises two sub-transitions: one from the MSL to a substrate integrated waveguide (SIW) and the second from the SIW to the RWG. Both are on the same substrate and can be manufactured with a standard printed circuit board process. This leads to a very cost-effective solution compared with other approaches. A WR-42 waveguide can easily be surface mounted to the transitions using a standard flange. The transitions have been fabricated, and their measured performance shows good agreement with the simulations. The MSL-SIW transition has a broadband behavior and the SIW-RWG transition still reaches a relative bandwidth of 10%.},
    author = {Hassan, Emadeldeen and Berggren, Martin and Scheiner, Benedict and Michler, Fabian and Weigel, Robert and Lurz, Fabian},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/202229996},
    year = {2019},
    month = {01},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Design of Planar Microstrip-to-Waveguide Transitions using Topology Optimization},
    venue = {Orlando, FL},
    }
  • J. Lichtblau, F. Michler, B. Scheiner, F. Lurz, M. Gräbner, M. Hundhausen, R. Weigel, and A. Koelpin, "Phased Array Approach for Vehicle-to-Infrastructure Communication in Train Stations" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, 2019 (to be published). [Bibtex]
    @inproceedings{lichtblau2019a,
    author = {Lichtblau, Johann and Michler, Fabian and Scheiner, Benedict and Lurz, Fabian and Gräbner, Martin and Hundhausen, Mira and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/208515022},
    year = {2019},
    month = {01},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Phased Array Approach for Vehicle-to-Infrastructure Communication in Train Stations},
    type = {Konferenzschrift},
    venue = {Orlando, FL},
    }
  • F. Michler, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "(Micro)metering with Microwaves: A Low-Cost Low-Power High-Precision Radar System", IEEE Microwave Magazine, vol. 20, iss. 1, pp. 91-97, 2019. [DOI] [Bibtex]
    @article{michler2019,
    author = {Michler, Fabian and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    cris = {https://cris.fau.de/converis/publicweb/publication/203795705},
    year = {2019},
    month = {01},
    day = {01},
    doi = {10.1109/MMM.2018.2875612},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {1},
    pages = {91--97},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {(Micro)metering with Microwaves: A Low-Cost Low-Power High-Precision Radar System},
    url = {https://ieeexplore.ieee.org/document/8575185},
    volume = {20},
    }
  • F. Michler, K. Shi, S. Schellenberger, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "Pulse Wave Velocity Detection Using a 24 GHz Six-Port Based Doppler Radar" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, 2019 (to be published). [Bibtex]
    @inproceedings{michler2019a,
    author = {Michler, Fabian and Shi, Kilin and Schellenberger, Sven and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/202125433},
    year = {2019},
    month = {01},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    note = {unpublished},
    peerreviewed = {automatic},
    title = {Pulse Wave Velocity Detection Using a 24 GHz Six-Port Based Doppler Radar},
    venue = {Orlando, FL},
    }
  • B. Scheiner, F. Lurz, F. Michler, I. Lau, J. Lichtblau, R. Weigel, and A. Koelpin, "Design of a Rotary Coupler for Data Transmission on Fast Rotating Mechanical Shafts and Roboter Arms" in IEEE Radio and Wireless Symposium (RWS), Orlando, FL, USA, 2019. [Bibtex]
    @inproceedings{scheiner2019,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Lau, Isabella and Lichtblau, Johann and Weigel, Robert and Koelpin, Alexander},
    booktitle = {IEEE Radio and Wireless Symposium (RWS)},
    cris = {https://cris.fau.de/converis/publicweb/publication/204085644},
    year = {2019},
    month = {01},
    day = {20},
    eventdate = {2019-01-20/2019-01-23},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Design of a Rotary Coupler for Data Transmission on Fast Rotating Mechanical Shafts and Roboter Arms},
    type = {Konferenzschrift},
    venue = {Orlando, FL, USA},
    }
  • B. Scheiner, S. Schellenberger, K. Shi, E. Heusinger, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Low-power contactless LC-tank based respiratory sensor", Electronics Letters, pp. 304-306, 2019. [DOI] [Bibtex]
    @article{scheiner2019a,
    author = {Scheiner, Benedict and Schellenberger, Sven and Shi, Kilin and Heusinger, Elisabeth and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    cris = {https://cris.fau.de/converis/publicweb/publication/208613711},
    year = {2019},
    month = {01},
    day = {29},
    doi = {10.1049/EL.2018.7936},
    faupublication = {yes},
    issn = {0013-5194},
    journaltitle = {Electronics Letters},
    pages = {304--306},
    peerreviewed = {Yes},
    shortjournal = {ELECTRON LETT},
    title = {Low-power contactless LC-tank based respiratory sensor},
    type = {Letter},
    }

2018

  • F. Michler, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "A Planar 24 GHz Switched-Beam Antenna Based on PIN Diodes for Remote Sensing Applications" in 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018. [Bibtex]
    @inproceedings{michler2018a,
    abstract = {This paper presents a planar switched-beam antenna for remote sensing applications at 24 GHz. The antenna consists of 9x8 radiating patches, arranged as nine linear arrays that are connected by phase shifters based on PIN diodes, which allow to quickly switch the main lobe between two symmetric states by using a small control current. The single array elements were designed and simulated in CST Microwave Studio and the array feed network including the phase shifters was analyzed using Keysight ADS. Measurements of all individual components and the final array antenna were taken to confirm the simulations and to prove the concept.
    }, author = {Michler, Fabian and Scheiner, Benedict and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {2018 Asia-Pacific Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/200392474}, year = {2018}, month = {11}, day = {06}, eventdate = {2018-11-06/2018-11-09}, faupublication = {yes}, peerreviewed = {Yes}, title = {A Planar 24 GHz Switched-Beam Antenna Based on PIN Diodes for Remote Sensing Applications}, type = {Konferenzschrift}, venue = {Kyoto, Japan}, }
  • K. Shi, S. Schellenberger, T. Steigleder, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Contactless Carotid Pulse Measurement Using Continuous Wave Radar" in 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018. [Bibtex]
    @inproceedings{shi2018b,
    abstract = {Cardiovascular diseases are one of the major causes of death. Regular checkups and preventive actions can drastically help reducing fatal incidences. This can be achieved by monitoring the carotid artery or rather the carotid pulse signal. Commonly, ultrasound devices are used for that purpose. However, these devices are costly, mostly stationary and their usage requires training and experience. This paper investigates the possible usage of radar systems as a contactless and low-cost alternative for carotid pulse measurements. Theoretical investigations reveal a linear relationship between the measurands of both devices and synchronous recordings from three test persons further confirm the feasibility of using radar systems as a potential device for monitoring cardiovascular diseases.},
    author = {Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 Asia-Pacific Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/202749417},
    year = {2018},
    month = {11},
    day = {06},
    eventdate = {2018-11-06/2018-08-09},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {Contactless Carotid Pulse Measurement Using Continuous Wave Radar},
    type = {Konferenzschrift},
    venue = {Kyoto, Japan},
    }
  • F. Michler, H. Deniz, F. Lurz, R. Weigel, and A. Koelpin, "Performance Analysis of an Ultra Wideband Transceiver for Real-Time Localization" in 2018 48th European Microwave Conference (EuMC), Madrid, Spain, 2018, pp. 1141-1144. [DOI] [Bibtex]
    @inproceedings{michler2018,
    abstract = {In this paper, an ultra wideband localization system based on the DecaWave DW1000 chipset is investigated in detail regarding the achievable precision and accuracy in different measurement scenarios. System parameters, such as channel selection, bandwidth, preamble length and measurement method will be explained in detail and their influence on the localization performance is estimated. Statistically evaluated measurements in different environments with a prototype system consisting of a single anchor and a tag are then used to confirm the theory.
    }, author = {Michler, Fabian and Deniz, Harun and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {2018 48th European Microwave Conference (EuMC)}, cris = {https://cris.fau.de/converis/publicweb/publication/110644204}, year = {2018}, month = {09}, day = {27}, doi = {10.23919/EUMC.2018.8541672}, eventdate = {2018-09-25/2018-09-27}, eventtitle = {European Microwave Conference (EuMC)}, faupublication = {yes}, isbn = {9782874870514}, pages = {1141--1144}, peerreviewed = {Yes}, title = {Performance Analysis of an Ultra Wideband Transceiver for Real-Time Localization}, type = {Konferenzschrift}, venue = {Madrid, Spain}, }
  • B. Scheiner, F. Lurz, F. Michler, S. Linz, R. Weigel, and A. Koelpin, "Six-Port Based Multitone and Low-Power Radar System for Waveguides in Smart Factories" in Proceedings of the 48th European Microwave Conference, Madrid, Spain, 2018, pp. 1065-1068. [DOI] [Bibtex]
    @inproceedings{scheiner2018b,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    booktitle = {Proceedings of the 48th European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/111656644},
    year = {2018},
    month = {09},
    day = {27},
    doi = {10.23919/EUMC.2018.8541518},
    eventdate = {2018-09-25/2018-09-27},
    eventtitle = {European Microwave Conference (EuMC)},
    faupublication = {yes},
    pages = {1065--1068},
    peerreviewed = {unknown},
    title = {Six-Port Based Multitone and Low-Power Radar System for Waveguides in Smart Factories},
    type = {Konferenzschrift},
    venue = {Madrid, Spain},
    }
  • T. Steigleder, A. Malessa, K. Shi, F. Michler, S. Schellenberger, M. Heckel, A. Koelpin, and C. Ostgathe, "Kontinuierliche berührungslose Erfassung von Herzschlag und Atmung als Surrogatparameter für Symptomlinderung–eine Pilotstudie", Zeitschrift für Palliativmedizin, vol. 19, iss. 05, 2018. [DOI] [Bibtex]
    @article{steigleder2018,
    abstract = {Fokus der Palliativmedizin (PM) ist die persönliche Begegnung. Häufig wird bei schwerer Krankheit auf apparative Therapie und Diagnostik verzichtet. Dennoch könnten Biomarker (BM, zB Herz-und Atemfrequenz) wichtige ergänzende Hinweise auf Symptomlast und zur individuellen Anpassung der medikamentösen Behandlung geben. Wir erforschen den innovativen Ansatz, BM mit Radartechnologie (RT) berührungs-und belastungsfrei zu erfassen. Ziel soll es ua in sein, in Zukunft die Symptomlinderung zu verbessern. RT, die auf einem interferometrischem Verfahren beruht, erfasst Herzschläge und Atmung mittels Messung der Distanzänderung zu der Radarantenne aus einigen Metern Entfernung und durch Materialen wie Kleidung oder Bettdecke hindurch. Lernende Algorithmen extrahieren die spezifischen Signale und werten sie automatisiert aus.},
    author = {Steigleder, Tobias and Malessa, Anke and Shi, Kilin and Michler, Fabian and Schellenberger, Sven and Heckel, Maria and Koelpin, Alexander and Ostgathe, Christoph},
    language = {German},
    cris = {https://cris.fau.de/converis/publicweb/publication/203858370},
    year = {2018},
    month = {08},
    doi = {10.1055/S-0038-1669350},
    faupublication = {yes},
    issn = {1615-2921},
    journaltitle = {Zeitschrift für Palliativmedizin},
    number = {05},
    peerreviewed = {No},
    title = {Kontinuierliche berührungslose Erfassung von Herzschlag und Atmung als Surrogatparameter für Symptomlinderung–eine Pilotstudie},
    type = {Article in Journal},
    url = {https://www.thieme-connect.com/products/ejournals/abstract/10.1055/s-0038-1669350},
    volume = {19},
    }
  • I. Lau, F. Michler, A. Talai, R. Weigel, and A. Koelpin, "A Resonant Substrate Integrated Waveguide Measurement System for True Relative Permittivity Extraction of PCB Materials up to 90 GHz" in IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes (IMWS-AMP), Ann Arbor, 2018, pp. 1-3. [DOI] [Bibtex]
    @inproceedings{lau2018,
    abstract = {This paper presents a resonant measurement method based on substrate integrated waveguide cavities for
    determination of the true relative permittivity of a PCB material. The sensor is manufactured on the unknown PCB material and in contrast to existing, comparable methods, the extraction process takes into account the metal roughness. The proposed method does not require any reference materials or sensors on different
    PCB thicknesses. This paper contains considerations regarding the design and simulation as well as measurement results of the sensor system. To validate the measurement system, the extracted relative permittivity values of the RO4350B substrate over the frequency range of 10 GHz to 90GHz are presented.
    }, author = {Lau, Isabella and Michler, Fabian and Talai, Armin and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {IEEE MTT-S International Microwave Workshop Series on Advanced Materials and Processes (IMWS-AMP)}, cris = {https://cris.fau.de/converis/publicweb/publication/200563113}, year = {2018}, month = {07}, day = {16}, doi = {10.1109/IMWS-AMP.2018.8457133}, eventdate = {2018-07-16/2018-07-18}, faupublication = {yes}, pages = {1--3}, peerreviewed = {unknown}, title = {A Resonant Substrate Integrated Waveguide Measurement System for True Relative Permittivity Extraction of PCB Materials up to 90 GHz}, type = {Konferenzschrift}, venue = {Ann Arbor}, }
  • C. Will, K. Shi, S. Schellenberger, T. Steigleder, F. Michler, J. Fuchs, R. Weigel, C. Ostgathe, and A. Koelpin, "Radar-Based Heart Sound Detection", Scientific Reports, 2018. [DOI] [Bibtex]
    @article{will2018,
    abstract = {This paper introduces heart sound detection by radar systems, which enables touch-free and continuous monitoring of heart sounds. The proposed measurement principle entails two enhancements in modern vital sign monitoring. First, common touch-based auscultation with a phonocardiograph can be simplified by using biomedical radar systems. Second, detecting heart sounds offers a further feasibility in radar-based heartbeat monitoring. To analyse the performance of the proposed measurement principle, 9930 seconds of eleven persons-under-tests' vital signs were acquired and stored in a database using multiple, synchronised sensors: a continuous wave radar system, a phonocardiograph (PCG), an electrocardiograph (ECG), and a temperature-based respiration sensor. A hidden semi-Markov model is utilised to detect the heart sounds in the phonocardiograph and radar data and additionally, an advanced template matching (ATM) algorithm is used for state-of-the-art radar-based heartbeat detection. The feasibility of the proposed measurement principle is shown by a morphology analysis between the data acquired by radar and PCG for the dominant heart sounds S1 and S2: The correlation is 82.97 ± 11.15% for 5274 used occurrences of S1 and 80.72 ± 12.16% for 5277 used occurrences of S2. The performance of the proposed detection method is evaluated by comparing the F-scores for radar and PCG-based heart sound detection with ECG as reference: Achieving an F1 value of 92.22 ± 2.07%, the radar system approximates the score of 94.15 ± 1.61% for the PCG. The accuracy regarding the detection timing of heartbeat occurrences is analysed by means of the root-mean-square error: In comparison to the ATM algorithm (144.9 ms) and the PCG-based variant (59.4 ms), the proposed method has the lowest error value (44.2 ms). Based on these results, utilising the detected heart sounds considerably improves radar-based heartbeat monitoring, while the achieved performance is also competitive to phonocardiography.
    }, author = {Will, Christoph and Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Michler, Fabian and Fuchs, Jonas and Weigel, Robert and Ostgathe, Christoph and Koelpin, Alexander}, cris = {https://cris.fau.de/converis/publicweb/publication/202373734}, year = {2018}, month = {07}, day = {26}, doi = {10.1038/S41598-018-29984-5}, faupublication = {yes}, issn = {2045-2322}, journaltitle = {Scientific Reports}, peerreviewed = {Yes}, title = {Radar-Based Heart Sound Detection}, type = {Report}, url = {https://www.nature.com/articles/s41598-018-29984-5}, }
  • K. Shi, C. Will, T. Steigleder, F. Michler, R. Weigel, C. Ostgathe, and A. Koelpin, "A Contactless System for Continuous Vital Sign Monitoring in Palliative and Intensive Care" in 2018 Annual IEEE International Systems Conference (SysCon), Vancouver, Kanada, Canada, 2018. [DOI] [Bibtex]
    @inproceedings{shi2018,
    abstract = {Vital sign monitoring systems play a crucial role in the medical environment. Patients in palliative and intensive care can especially benefit from continuous observation by detecting sudden changes in health status allowing the medical staff to promptly provide intensified symptom amelioration at the end-of-life. However, machine based monitoring like electrocardiography requires the patient being permanently wired to the device. This circumstance severely restricts the independence and mobility of the patient, leading to a decrease in the quality of life. For this reason, palliative care stations currently usually avoid continuous monitoring. After a comprehensive literature survey and background research, this paper presents a novel approach by using a single radar system to perform continuous and above all contactless monitoring of respiration and heartbeat. A continuous wave radar using the Six-Port technology is introduced and its feasibility, performance and real-time capability are validated in long-term measurements on different test persons. In comparison to gold standard reference devices a correlation of 97.6% was achieved.},
    author = {Shi, Kilin and Will, Christoph and Steigleder, Tobias and Michler, Fabian and Weigel, Robert and Ostgathe, Christoph and Koelpin, Alexander},
    language = {English},
    booktitle = {2018 Annual IEEE International Systems Conference (SysCon)},
    cris = {https://cris.fau.de/converis/publicweb/publication/106234964},
    year = {2018},
    month = {04},
    day = {23},
    doi = {10.1109/SYSCON.2018.8369507},
    eventdate = {2018-04-23/2018-04-26},
    faupublication = {yes},
    peerreviewed = {unknown},
    title = {A Contactless System for Continuous Vital Sign Monitoring in Palliative and Intensive Care},
    type = {Konferenzschrift},
    venue = {Vancouver, Kanada, Canada},
    }
  • A. Malessa, T. Steigleder, K. Shi, C. Will, F. Michler, A. Koelpin, and C. Ostgathe, "Neue Wege in der Palliativmedizin – Herausforderungen bei der Entwicklung einer berührungslosen, nicht-belastenden Messung von Vitalparametern" in Wissenschaftliche Arbeitstage der DGP, Göttingen, Germany, 2018. [Bibtex]
    @inproceedings{malessa2018,
    author = {Malessa, Anke and Steigleder, Tobias and Shi, Kilin and Will, Christoph and Michler, Fabian and Koelpin, Alexander and Ostgathe, Christoph},
    language = {German},
    booktitle = {Wissenschaftliche Arbeitstage der DGP},
    cris = {https://cris.fau.de/converis/publicweb/publication/107042364},
    year = {2018},
    month = {03},
    day = {09},
    eventdate = {2018-03-09/2018-03-10},
    faupublication = {yes},
    peerreviewed = {Yes},
    title = {Neue Wege in der Palliativmedizin – Herausforderungen bei der Entwicklung einer berührungslosen, nicht-belastenden Messung von Vitalparametern},
    type = {Konferenzschrift},
    venue = {Göttingen, Germany},
    }
  • B. Scheiner, F. Lurz, F. Michler, S. Lindner, S. Linz, R. Weigel, and A. Koelpin, "Fast Dual-Synthesizer for Six-Port In-Situ Linearization in the 2,4 GHz ISM-Band" in German Microwave Conference, Freiburg, Germany, 2018, pp. 223-226. [DOI] [Bibtex]
    @inproceedings{scheiner2018a,
    author = {Scheiner, Benedict and Lurz, Fabian and Michler, Fabian and Lindner, Stefan and Linz, Sarah and Weigel, Robert and Koelpin, Alexander},
    booktitle = {German Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/106328904},
    year = {2018},
    month = {03},
    day = {13},
    doi = {10.23919/GEMIC.2018.8335070},
    eventdate = {2018-03-12/2018-03-14},
    faupublication = {yes},
    pages = {223--226},
    peerreviewed = {unknown},
    title = {Fast Dual-Synthesizer for Six-Port In-Situ Linearization in the 2,4 GHz ISM-Band},
    type = {Konferenzschrift},
    venue = {Freiburg, Germany},
    }
  • F. Lurz, F. Michler, B. Scheiner, R. Weigel, and A. Koelpin, "Microw(h)att?! Ultralow-Power Six-Port Radar", IEEE Microwave Magazine, vol. 19, iss. 1, pp. 91-98, 2018. [DOI] [Bibtex]
    @article{lurz2018,
    author = {Lurz, Fabian and Michler, Fabian and Scheiner, Benedict and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {IEEE Microwave Magazine},
    cris = {https://cris.fau.de/converis/publicweb/publication/120389104},
    year = {2018},
    month = {01},
    doi = {10.1109/MMM.2017.2759640},
    faupublication = {yes},
    issn = {1527-3342},
    journaltitle = {IEEE Microwave Magazine},
    number = {1},
    pages = {91--98},
    peerreviewed = {Yes},
    shortjournal = {IEEE MICROW MAG},
    title = {Microw(h)att?! Ultralow-Power Six-Port Radar},
    volume = {19},
    }
  • F. Lurz, P. Hofstetter, S. Lindner, S. Linz, F. Michler, R. Weigel, and A. Koelpin, "Low-Power Frequency Synthesizer for Multi-Tone Six-Port Radar" in IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet), Anaheim, CA, USA, 2018, pp. 84-87. [DOI] [Bibtex]
    @inproceedings{lurz2018a,
    author = {Lurz, Fabian and Hofstetter, Patrick and Lindner, Stefan and Linz, Sarah and Michler, Fabian and Weigel, Robert and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Topical Conference on Wireless Sensors and Sensor Networks (WiSNet)},
    cris = {https://cris.fau.de/converis/publicweb/publication/120470944},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/WISNET.2018.8311571},
    eventdate = {2018-01-14/2018-01-17},
    faupublication = {yes},
    pages = {84--87},
    peerreviewed = {Yes},
    title = {Low-Power Frequency Synthesizer for Multi-Tone Six-Port Radar},
    venue = {Anaheim, CA, USA},
    }
  • B. Scheiner, S. Mann, F. Lurz, F. Michler, S. Erhardt, S. Lindner, R. Weigel, and A. Koelpin, "Microstrip-to-Waveguide Transition in Planar Form Using a Substrate Integrated Waveguide" in Radio and Wireless Symposium (RWS), 2018 IEEE, Anaheim, CA, USA, 2018, pp. 18-20. [DOI] [Bibtex]
    @inproceedings{scheiner2018,
    author = {Scheiner, Benedict and Mann, Sebastian and Lurz, Fabian and Michler, Fabian and Erhardt, Stefan and Lindner, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {Radio and Wireless Symposium (RWS), 2018 IEEE},
    cris = {https://cris.fau.de/converis/publicweb/publication/110064284},
    year = {2018},
    month = {01},
    day = {14},
    doi = {10.1109/RWS.2018.8304934},
    eventdate = {2018-01-14/2018-01-17},
    eventtitle = {IEEE Radio Wireless Symposium},
    faupublication = {yes},
    pages = {18--20},
    peerreviewed = {Yes},
    title = {Microstrip-to-Waveguide Transition in Planar Form Using a Substrate Integrated Waveguide},
    type = {Konferenzschrift},
    venue = {Anaheim, CA, USA},
    }
  • S. Schellenberger, K. Shi, T. Steigleder, F. Michler, F. Lurz, R. Weigel, and A. Koelpin, "Support Vector Machine-Based Instantaneous Presence Detection for Continuous Wave Radar Systems" in 2018 Asia-Pacific Microwave Conference, Kyoto, Japan, 2018, pp. 1465-1467. [DOI] [Bibtex]
    @inproceedings{schellenberger2018a,
    abstract = {Instantaneous detection of missing vital signs at inpatient beds enables fast intervention for cardiac arrests.
    Using a 24 GHz bistatic radar, a fast presence detection based on a support vector machine (SVM) classifer is realized. Large body motions or even small distance deviations, such as movement of the chest induced by heartbeat or breathing, are distinguishable from the measured noise of an unoccupied bed. For classifcation two features are calculated based on windowed I and Q data. Performance is evaluated by varying window sizes from 0.2 ... 1.5 s for feature calculation and training of the SVM classifer. In the resting scenario an accuracy of 99.2% and F1-score of 99.1% with windows of 0.2 s is achieved.
    }, author = {Schellenberger, Sven and Shi, Kilin and Steigleder, Tobias and Michler, Fabian and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander}, language = {English}, booktitle = {2018 Asia-Pacific Microwave Conference}, cris = {https://cris.fau.de/converis/publicweb/publication/203101192}, year = {2018}, month = {01}, day = {06}, doi = {10.23919/APMC.2018.8617181}, eventdate = {2018-11-06/2018-11-09}, faupublication = {yes}, pages = {1465--1467}, peerreviewed = {Yes}, title = {Support Vector Machine-Based Instantaneous Presence Detection for Continuous Wave Radar Systems}, type = {Journal Article}, venue = {Kyoto, Japan}, }

2017

  • C. Will, S. Mann, F. Michler, T. Reißland, F. Lurz, R. Weigel, and A. Koelpin, "Error Compensation of the Temperature Influence on Radar based Displacement Measurements" in 2017 IEEE Asia Pacific Microwave Conference (APMC), Kuala Lumpur, Malaysia, 2017, pp. 89-92. [DOI] [Bibtex]
    @inproceedings{will2017c,
    abstract = {Highly precise sensor systems for contactless displacement measurements play an important role within the industrial application field. Various radar based measurement systems utilizing different techniques have been published for this purpose, but the influence of the ambient temperature on the measurement results has only rarely been investigated, yet. Whereas many publications deal with research on temperature compensation of single components, this paper describes the influence of the ambient temperature on the entire RF front end of the sensor system, a 61 GHz Six-Port interferometer. After presenting the measurement system, the temperature influences on the four output voltages and the consequences for the measurement results are analyzed. Finally, a compensation algorithm is proposed to decrease the temperature induced impairments of the systematic measurement error.},
    author = {Will, Christoph and Mann, Sebastian and Michler, Fabian and Reißland, Torsten and Lurz, Fabian and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    publisher = {IEEE},
    booktitle = {2017 IEEE Asia Pacific Microwave Conference (APMC)},
    cris = {https://cris.fau.de/converis/publicweb/publication/108238064},
    year = {2017},
    month = {11},
    day = {13},
    doi = {10.1109/APMC.2017.8251384},
    eventdate = {2017-11-13/2017-11-16},
    eventtitle = {IEEE Asia Pacific Microwave Conference (APMC)},
    faupublication = {yes},
    pages = {89--92},
    peerreviewed = {Yes},
    title = {Error Compensation of the Temperature Influence on Radar based Displacement Measurements},
    type = {Konferenzschrift},
    venue = {Kuala Lumpur, Malaysia},
    }
  • F. Michler, S. Lindner, F. Lurz, S. Erhardt, R. Weigel, and A. Koelpin, "Zero-Bias Schottky Power Detector Design for Six-Port based Radar Systems" in European Microwave Conference, Nürnberg, Germany, 2017. [DOI] [Bibtex]
    @inproceedings{michler2017,
    author = {Michler, Fabian and Lindner, Stefan and Lurz, Fabian and Erhardt, Stefan and Weigel, Robert and Koelpin, Alexander},
    language = {English},
    booktitle = {European Microwave Conference},
    cris = {https://cris.fau.de/converis/publicweb/publication/108331564},
    year = {2017},
    month = {10},
    day = {08},
    doi = {10.23919/EUMC.2017.8230841},
    eventdate = {2017-10-08/2017-10-13},
    faupublication = {yes},
    isbn = {9782874870477},
    peerreviewed = {Yes},
    title = {Zero-Bias Schottky Power Detector Design for Six-Port based Radar Systems},
    type = {Konferenzschrift},
    venue = {Nürnberg, Germany},
    }
  • C. Will, K. Shi, S. Schellenberger, T. Steigleder, F. Michler, R. Weigel, C. Ostgathe, and A. Koelpin, "Local Pulse Wave Detection using Continuous Wave Radar Systems", IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology, vol. 1, iss. 2, pp. 81-89, 2017. [DOI] [Bibtex]
    @article{will2017e,
    author = {Will, Christoph and Shi, Kilin and Schellenberger, Sven and Steigleder, Tobias and Michler, Fabian and Weigel, Robert and Ostgathe, Christoph and Koelpin, Alexander},
    publisher = {IEEE},
    booktitle = {IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology},
    cris = {https://cris.fau.de/converis/publicweb/publication/123402224},
    year = {2017},
    month = {10},
    day = {27},
    doi = {10.1109/JERM.2017.2766567},
    faupublication = {yes},
    issn = {2469-7249},
    journaltitle = {IEEE Journal of Electromagnetics, RF and Microwaves in Medicine and Biology},
    number = {2},
    pages = {81--89},
    peerreviewed = {Yes},
    title = {Local Pulse Wave Detection using Continuous Wave Radar Systems},
    volume = {1},
    }

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