Alexander Koelpin

ORCID

Publication Activity (10 Years)

Years Active: 2008-2024
Publications (10 Years): 74

Top Venues

Publications

Marvin Wenzel, Dominik Langer, Alexander Koelpin, Fabian Lurz
A Modular 61 GHz Vital Sign Sensing Radar System for Long-term Clinical Studies. WiSNeT (2024)
Amrit Zoad, Alexander Koelpin, Andreas Penirschke
Non-Invasive Determination of the Mass Flow Rate for Particulate Solids Using Microwaves. Sensors 23 (24) (2023)
Nils C. Albrecht, Markus Heyer, Marvin Wenzel, Dominik Langer, Hui Lu, Alexander Koelpin
Long-Distance Heart Sound Detection using 122 GHz CW Radar with 3D Printed High-Gain Antennas. RWS (2023)
Stefan Erhardt, Martin Koch, Andreas Kiefer, Michael Veith, Robert Weigel, Alexander Koelpin
Mobile-BAT - A Novel Ultra-Low Power Wildlife Tracking System. Sensors 23 (11) (2023)
Johanna Gleichauf, Lukas Hennemann, Fabian B. Fahlbusch, Oliver Hofmann, Christine Niebler, Alexander Koelpin
Sensor Fusion for the Robust Detection of Facial Regions of Neonates Using Neural Networks. Sensors 23 (10) (2023)
Nico Weiss, Alexander Koelpin, Irina Wiemann, Eberhard Schlücker
A novel method for determining the degree of hydrogen loading of LOHC using cavity based permittivity measurements. WiSNeT (2023)
Torsten Reissland, Robert Weigel, Alexander Koelpin, Fabian Lurz
Theoretical Limits and Interpolation based Improvements of a Correlation Based True-Speed-Over-Ground Estimation. WiSNeT (2023)
Hui Lu, Markus Heyder, Marvin Wenzel, Nils C. Albrecht, Dominik Langer, Alexander Koelpin
Accurate Heart Beat Detection with Doppler Radar using Bidirectional GRU Network. RWS (2023)
Liv Herzer, Annika Muecke, Robert Richer, Nils C. Albrecht, Markus Heyder, Katharina Jäger, Veronika Koenig, Alexander Koelpin, Nicolas Rohleder, Bjoern M. Eskofier
Influence of Sensor Position and Body Movements on Radar-Based Heart Rate Monitoring. BHI (2022)
Hui Lu, Julia Beatriz Yip, Tobias Steigleder, Stefan Grießhammer, Maria Heckel, Naga Venkata Sai Jitin Jami, Bjoern Eskofier, Christoph Ostgathe, Alexander Koelpin
A Lightweight Robust Approach for Automatic Heart Murmurs and Clinical Outcomes Classification from Phonocardiogram Recordings. CinC (2022)
Torsten Reissland, Fabian Michler, Robert Weigel, Alexander Koelpin, Fabian Lurz
Influence of Self-Interference in a Radar System for a Correlation Based True-Speed-Over-Ground Estimation Approach. WiSNet (2022)
Benedict Scheiner, Florian Probst, Fabian Michler, Robert Weigel, Alexander Koelpin, Fabian Lurz
Low-Cost Six-Port for High-Volume Frequency Measurement Systems in the 2.4 GHz ISM-Band. WiSNet (2021)
Johanna Gleichauf, Sven Herrmann, Lukas Hennemann, Hannes Krauss, Janina Nitschke, Philipp Renner, Christine Niebler, Alexander Koelpin
Automated Non-Contact Respiratory Rate Monitoring of Neonates Based on Synchronous Evaluation of a 3D Time-of-Flight Camera and a Microwave Interferometric Radar Sensor. Sensors 21 (9) (2021)
Benedict Scheiner, Florian Probst, Fabian Michler, Robert Weigel, Alexander Koelpin, Fabian Lurz
Miniaturized Hybrid Frequency Reader for Contactless Measurement Scenarios Using Resonant Surface Acoustic Wave Sensors. Sensors 21 (7) (2021)
Nabanita Sengupta, Johannes Rossouw van der Merwe, Alexander Koelpin, Alexander Rügamer, Matthias Kuhl, Wolfgang Felber
Multibeam antenna array and software switching for low-complexity low-cost GNSS beamforming. ICL-GNSS (2021)
Kilin Shi, Sven Schellenberger, Fabian Michler, Tobias Steigleder, Anke Malessa, Fabian Lurz, Christoph Ostgathe, Robert Weigel, Alexander Koelpin
Automatic Signal Quality Index Determination of Radar-Recorded Heart Sound Signals Using Ensemble Classification. IEEE Trans. Biomed. Eng. 67 (3) (2020)
Simon Heining, Fabian Michler, Benedict Scheiner, Emadeldeen Hassan, Alexander Koelpin, Robert Weigel, Fabian Lurz
An Ultra Broadband Multi-Tone Six-Port Radar for Distance Measurements in K-Band Waveguides. RWS (2020)
Fabian Michler, Kilin Shi, Sven Schellenberger, Benedict Scheiner, Fabian Lurz, Robert Weigel, Alexander Koelpin
On the Impact of System Nonlinearities in Continuous-Wave Radar Systems for Vital Parameter Sensing. WiSNet (2020)
Christian Dorn, Stefan Erhardt, Robert Weigel, Alexander Koelpin, Fabian Lurz
Low-Cost Direction-of-Arrival Measurements using Multiplexed Antenna Switching. WiSNet (2020)
Sven Schellenberger, Kilin Shi, Fabian Michler, Fabian Lurz, Robert Weigel, Alexander Koelpin
Continuous In-Bed Monitoring of Vital Signs Using a Multi Radar Setup for Freely Moving Patients. Sensors 20 (20) (2020)
Martin Frank, Fabian Lurz, Robert Weigel, Alexander Koelpin
Universal low-cost Transmitarray Antenna Design at 61 GHz for Beam Steering with different Feed Antennas. WSA (2020)
Stefan Erhardt, Josef Koller, Fabian Lurz, Robert Weigel, Alexander Koelpin
An Automatic Detection and Data Downlink System for Miniature Bat Loggers. RWS (2020)
Johanna Gleichauf, Christine Niebler, Alexander Koelpin
Automatic non-contact monitoring of the respiratory rate of neonates using a structured light camera. EMBC (2020)
Martin Frank, Fabian Lurz, Markus Kempf, Jürgen Röber, Robert Weigel, Alexander Koelpin
Miniaturized Ultra-Wideband Antenna Design for Human Implants. RWS (2020)
Sarah Linz, Fabian Lurz, Robert Weigel, Alexander Koelpin
Extended Ellipse-based Reconstruction Algorithm for Six-port Radar. RWS (2019)
Niklas Duda, Alexander Barthule, Simon Ripperger, Frieder Mayer, Robert Weigel, Alexander Koelpin
Non-Invasive Low Power ECG for Heart Beat Detection of Bats. WiSNet (2019)
Martin Frank, Fabian Lurz, Robert Weigel, Alexander Koelpin
122 GHz Low-cost Substrate Integrated Waveguide based Leaky-Wave Antenna Design. RWS (2019)
Johann Lichtblau, Fabian Michler, Benedict Scheiner, Fabian Lurz, Martin Graebner, Mira Hundhausen, Robert Weigel, Alexander Koelpin
Phased Array Approach for Vehicle-to-Infrastructure Communication in Train Stations. RWS (2019)
Fabian Michler, Kilin Shi, Sven Schellenberger, Tobias Steigleder, Anke Malessa, Laura Hameyer, Nina Neumann, Fabian Lurz, Christoph Ostgathe, Robert Weigel, Alexander Koelpin
A Clinically Evaluated Interferometric Continuous-Wave Radar System for the Contactless Measurement of Human Vital Parameters. Sensors 19 (11) (2019)
Kilin Shi, Sven Schellenberger, Leon Weber, Jan Philipp Wiedemann, Fabian Michler, Tobias Steigleder, Anke Malessa, Fabian Lurz, Christoph Ostgathe, Robert Weigel, Alexander Koelpin
Segmentation of Radar-Recorded Heart Sound Signals Using Bidirectional LSTM Networks. EMBC (2019)
Johann Lichtblau, Fabian Lurz, Robert Weigel, Alexander Koelpin
Measurements for Onboard Communication in a High-Speed Train up to 330 km/h for Selected Scenarios at 2.45 GHz. RWS (2019)
Fabian Michler, Kilin Shi, Sven Schellenberger, Benedict Scheiner, Fabian Lurz, Robert Weigel, Alexander Koelpin
Pulse Wave Velocity Detection Using a 24 GHz Six-Port Based Doppler Radar. RWS (2019)
Torsten Reissland, Matthias Kuba, Joerg Robert, Alexander Koelpin, Robert Weigel, Fabian Lurz
Synchronization Approaches and Improvements for a Low-Complexity Power Line Communication System. SmartGridComm (2019)
Stefan Erhardt, Robert Weigel, Alexander Koelpin
A Small and Lightweight Ultra-Low Power GSM Cell Tracker. WiSNet (2019)
Benedict Scheiner, Fabian Lurz, Fabian Michler, Isabella Lau, Johann Lichtblau, Robert Weigel, Alexander Koelpin
Design of a Rotary Coupler for Data Transmission on Fast Rotating Mechanical Shafts and Roboter Arms. RWS (2019)
Sven Schellenberger, Kilin Shi, Jan Philipp Wiedemann, Fabian Lurz, Robert Weigel, Alexander Koelpin
An Ensemble LSTM Architecture for Clinical Sepsis Detection. CinC (2019)
Torsten Reissland, Fabian Lurz, Robert Weigel, Alexander Koelpin
Compressed Sensing Based Near-Field Radar Target Imaging and Localization Employing Normalized Iterative Hard Thresholding. WiSNet (2019)
Sven Schellenberger, Kilin Shi, Fabian Michler, Fabian Lurz, Robert Weigel, Alexander Koelpin
Respiration Extraction from Radar Heart Sound Measurements. EMBC (2019)
Niklas Duda, Simon Ripperger, Marco Tschapka, Frieder Mayer, Robert Weigel, Alexander Koelpin
Wireless Sensor Platform for Detection of Vital Parameters of Bats. EMBC (2019)
Kilin Shi, Christoph Will, Tobias Steigleder, Fabian Michler, Robert Weigel, Christoph Ostgathe, Alexander Koelpin
A contactless system for continuous vital sign monitoring in palliative and intensive care. SysCon (2018)
Sven Schellenberger, Kilin Shi, Melanie Mai, Jan Philipp Wiedemann, Tobias Steigleder, Björn M. Eskofier, Robert Weigel, Alexander Koelpin
Detecting Respiratory Effort-Related Arousals in Polysomnographic Data Using LSTM Networks. CinC (2018)
Fabian Lurz, Patrick Hofstetter, Stefan Lindner, Sarah Linz, Fabian Michler, Robert Weigel, Alexander Koelpin
Low-power frequency synthesizer for multi-tone six-port radar. WiSNet (2018)
Stefan Erhardt, Felix Pflaum, Robert Weigel, Alexander Koelpin
Real-time GSM broadcast receiver on a Cortex-M4 microcontroller. WiSNet (2018)
Felix Pflaum, Robert Weigel, Alexander Koelpin
Ultra-low-power sensor node with wake-up-functionality for smart-sensor-applications. WiSNet (2018)
Johann Lichtblau, Benedikt Sanftl, Fabian Lurz, Robert Weigel, Alexander Koelpin
Examination of OFDM for wireless train-onboard communication. RWS (2018)
Fabian Lurz, Thomas Ostertag, Benedict Scheiner, Robert Weigel, Alexander Koelpin
Reader Architectures for Wireless Surface Acoustic Wave Sensors. Sensors 18 (6) (2018)
Kilin Shi, Christoph Will, Robert Weigel, Alexander Koelpin
Contactless person identification using cardiac radar signals. I2MTC (2018)
Benedikt Sanftl, Martin Trautmann, Robert Weigel, Alexander Koelpin
Fully integrated remote radio head and improved data transmission for inductive power transfer systems. RWS (2018)
Niklas Duda, Thorsten Nowak, Markus Hartmann, Michael Schadhauser, Björn Cassens, Peter Wägemann, Muhammad Nabeel, Simon Ripperger, Sebastian Herbst, Klaus Meyer-Wegener, Frieder Mayer, Falko Dressler, Wolfgang Schröder-Preikschat, Rüdiger Kapitza, Jörg Robert, Jörn Thielecke, Robert Weigel, Alexander Koelpin
BATS: Adaptive Ultra Low Power Sensor Network for Animal Tracking. Sensors 18 (10) (2018)
Benedict Scheiner, Sebastian Mann, Fabian Lurz, Fabian Michler, Stefan Erhardt, Stefan Lindner, Robert Weigel, Alexander Koelpin
Microstrip-to-waveguide transition in planar form using a substrate integrated waveguide. RWS (2018)
Martin Frank, Pol Ghesquière, Stefan Kiefl, Robert Weigel, Alexander Koelpin
Design and characterization of antenna arrays in eWLB package for 61 GHz radar applications. RWS (2018)
Elena Boshkovska, Derrick Wing Kwan Ng, Nikola Zlatanov, Alexander Koelpin, Robert Schober
Robust Resource Allocation for MIMO Wireless Powered Communication Networks Based on a Non-Linear EH Model. IEEE Trans. Commun. 65 (5) (2017)
Sarah Linz, Christoph Will, Fabian Lurz, Stefan Lindner, Sebastian Mann, Robert Schober, Robert Weigel, Alexander Koelpin
Detector nonlinearity in Six-port radar. WiSNet (2017)
Christoph Will, Sarah Linz, Sebastian Mann, Fabian Lurz, Stefan Lindner, Robert Weigel, Alexander Koelpin
Segmental polynomial approximation based phase error correction for precise near field displacement measurements using Six-Port microwave interferometers. WiSNet (2017)
Fabian Lurz, Stefan Lindner, Sarah Linz, Sebastian Mann, Robert Weigel, Alexander Koelpin
High-Speed Resonant Surface Acoustic Wave Instrumentation Based on Instantaneous Frequency Measurement. IEEE Trans. Instrum. Meas. 66 (5) (2017)
Felix Pflaum, Stefan Erhardt, Robert Weigel, Alexander Koelpin
RSSI-based localization with minimal infrastructure using multivariate statistic techniques. WiSNet (2017)
Martin Trautmann, Marius Ohlendorf, Benedikt Sanftl, Robert Weigel, Alexander Koelpin
Dimensioning and comparison of common compensation topologies for IPT systems. ISCAS (2017)
Matej Kloc, Robert Weigel, Alexander Koelpin
SDR implementation of an adaptive low-latency IEEE 802.11p transmitter system for real-time wireless applications. RWS (2017)
Matthias Haberl, Benedikt Sanftl, Martin Trautmann, Robert Weigel, Alexander Koelpin
A direct RF-to-baseband quadrature subsampling receiver using a low cost ADC. RWS (2017)
Gabor Vinci, Alexander Koelpin
Progress of Six-Port technology for industrial radar applications. WiSNet (2016)
Sebastian Mann, Fabian Lurz, Sarah Linz, Stefan Lindner, Christoph Will, S. Wibbing, Robert Weigel, Alexander Koelpin
Substrate integrated waveguide fed antenna for 61 GHz ultra-short-range interferometric radar systems. WiSNet (2016)
Elena Boshkovska, Alexander Koelpin, Derrick Wing Kwan Ng, Nikola Zlatanov, Robert Schober
Robust Beamforming for SWIPT Systems with Non-linear Energy Harvesting Model. CoRR (2016)
Christoph Will, Kilin Shi, Fabian Lurz, Robert Weigel, Alexander Koelpin
Instantaneous heartbeat detection using a cross-correlation based template matching for continuous wave radar systems. WiSNet (2016)
Frank Steinhäußer, Armin Talai, Gabriela Sandulache, Robert Weigel, Alexander Koelpin, Wolfgang Hansal, Achim Bittner, Ulrich Schmid
Pulse plated silver metallization on porosified LTCC substrates for high frequency applications. Microelectron. Reliab. 60 (2016)
Alexander Koelpin, Fabian Lurz, Sarah Linz, Sebastian Mann, Christoph Will, Stefan Lindner
Six-Port Based Interferometry for Precise Radar and Sensing Applications. Sensors 16 (10) (2016)
Fabian Lurz, Stefan Lindner, Sebastian Mann, Sarah Linz, Robert Weigel, Alexander Koelpin
Precise and fast frequency determination of resonant SAW sensors by a low-cost Six-Port interferometer. I2MTC (2016)
Martin Hierold, Markus Hartmann, Simon Ripperger, Frieder Mayer, Albert Heuberger, Robert Weigel, Alexander Koelpin
Low-weight wireless sensor node for animal encounter detection and dual-band localization. WiSNet (2016)
S. Lindner, Robert Weigel, Alexander Koelpin
A low-cost laser barrier based vectorial velocity measurement system. IEEE SENSORS (2016)
Elena Boshkovska, Alexander Koelpin, Derrick Wing Kwan Ng, Nikola Zlatanov, Robert Schober
Robust beamforming for SWIPT systems with non-linear energy harvesting model. SPAWC (2016)
Martin Trautmann, Christopher Joffe, Felix Pflaum, Benedikt Sanftl, Robert Weigel, Thomas Heckel, Alexander Koelpin
Implementation of simultaneous energy and data transfer in a contactless connector. WiSNet (2016)
Fabian Lurz, Christian Dorn, Stefan Lindner, Sarah Linz, Sebastian Mann, Robert Weigel, Alexander Koelpin
Digital phase correction for multiplexed ADCs in low-cost Six-Port interferometers. WiSNet (2016)
Falko Dressler, Simon Ripperger, Martin Hierold, Thorsten Nowak, Christopher Eibel, Björn Cassens, Frieder Mayer, Klaus Meyer-Wegener, Alexander Koelpin
From radio telemetry to ultra-low-power sensor networks: tracking bats in the wild. IEEE Commun. Mag. 54 (1) (2016)
Kamil Staszek, Sarah Linz, Fabian Lurz, Sebastian Mann, Robert Weigel, Alexander Koelpin
Improved calibration procedure for six-port based precise displacement measurements. WiSNet (2016)
Elena Boshkovska, Derrick Wing Kwan Ng, Nikola Zlatanov, Alexander Koelpin, Robert Schober
Robust Resource Allocation for MIMO Wireless Powered Communication Networks Based on a Non-linear EH Model. CoRR (2016)
Stefan Lindner, Francesco Barbon, Sarah Linz, Fabian Lurz, Sebastian Mann, Robert Weigel, Alexander Koelpin
ADC depending limitations for Six-Port based distance measurement systems. WiSNet (2015)
Falko Dressler, Bastian Bloessl, Martin Hierold, Chia-Yu Hsieh, Thorsten Nowak, Robert Weigel, Alexander Koelpin
Protocol design for ultra-low power wake-up systems for tracking bats in the wild. ICC (2015)
Sarah Linz, Florian Oesterle, Armin Talai, Stefan Lindner, Sebastian Mann, Francesco Barbon, Robert Weigel, Alexander Koelpin
100 GHz reflectometer for sensitivity analysis of MEMS sensors comprising an intermediate frequency Six-port receiver. WiSNet (2015)
Michael Sporer, Fabian Lurz, Eberhard Schlücker, Robert Weigel, Alexander Koelpin
Underwater interferometric radar sensor for distance and vibration measurement. WiSNet (2015)
Martin Hierold, Simon Ripperger, Darija Josic, Frieder Mayer, Robert Weigel, Alexander Koelpin
Low-weight wireless sensor network for encounter detection of bats. WiSNet (2015)
Thorsten Nowak, Alexander Koelpin, Falko Dressler, Markus Hartmann, Lucila Patino, Jörn Thielecke
Combined localization and data transmission in energy-constrained wireless sensor networks. WiSNet (2015)
Sebastian Mann, Stefan Erhardt, Stefan Lindner, Fabian Lurz, Sarah Linz, Francesco Barbon, Robert Weigel, Alexander Koelpin
Diode detector design for 61 GHz substrate integrated waveguide Six-Port radar systems. WiSNet (2015)
Fabian Lurz, Sebastian Mann, Sarah Linz, Stefan Lindner, Francesco Barbon, Robert Weigel, Alexander Koelpin
A low power 24 GHz radar system for occupancy monitoring. RWS (2015)
Christoph Will, Kilin Shi, Fabian Lurz, Robert Weigel, Alexander Koelpin
Intelligent signal processing routine for instantaneous heart rate detection using a Six-Port microwave interferometer. ISPACS (2015)
Serioja Ovidiu Tatu, Adriana Serban, Alexander Koelpin, Mohamed Helaoui
Multiport Technology: New Perspectives and Applications. J. Electr. Comput. Eng. 2014 (2014)
Francesco Barbon, Stefan Lindner, Sebastian Mann, Sarah Linz, Robert Weigel, Alexander Koelpin
Fast in-situ diode detector characterization for Six-Port interferometer receivers. WiSNet (2014)
Markus Gardill, Dennis Kay, Robert Weigel, Alexander Koelpin
Numerical investigations on the quasi-stationary response of antennas to wideband LFMCW excitation. EUSIPCO (2014)
Sebastian Mann, Stefan Lindner, Francesco Barbon, Sarah Linz, Armin Talai, Robert Weigel, Alexander Koelpin
A tank level sensor based on Six-Port technique comprising a quasi-TEM waveguide. WiSNet (2014)
Armin Talai, Sebastian Mann, Robert Weigel, Alexander Koelpin
Water temperature measurement by microwave six-port interferometry at 24 GHz. WiSNet (2014)
Thorsten Nowak, Martin Hierold, Alexander Koelpin, Markus Hartmann, Hans-Martin Troger, Jörn Thielecke
System and signal design for an energy-efficient multi-frequency localization system. WiSNet (2014)
Sarah Linz, Gabor Vinci, Sebastian Mann, Stefan Lindner, Francesco Barbon, Robert Weigel, Alexander Koelpin
A Compact, Versatile Six-Port Radar Module for Industrial and Medical Applications. J. Electr. Comput. Eng. 2013 (2013)
Markus Gardill, Klaus Finkenzeller, Walter Hinz, Georg Fischer, Robert Weigel, Alexander Koelpin
A Review and Comparative Study of On- and Off-Body Performance of Platform-Tolerant UHF RFID Tag Antennas. BODYNETS (2013)
Steffen Mueller, Fabian Lurz, Robert Weigel, Alexander Koelpin
A high performance line filter for narrowband power line communication testbed applications. SmartGridComm (2013)
Markus Gardill, Georg Fischer, Robert Weigel, Alexander Koelpin
Design of a robust and low-cost monocone antenna element for use in vehicle roof-mounted antenna arrays. RWS (2013)
Alexander Koelpin, Stefan Lindner, Gabor Vinci, Benjamin Laemmle, Robert Weigel
The enhanced six-port architecture: A measurement based proof of concept. WiSNet (2012)
Gunther Dehm-Andone, Raphael Mzyk, Frank Hausknecht, Georg Fischer, Robert Weigel, Alexander Koelpin
Filter design aspects in analog receiver front-ends for frequency scanning applications. ISSSE (2012)
Alban Ferizi, Bernhard Hoeher, Melanie Jung, Georg Fischer, Alexander Koelpin
Design and implementation of a fixed-point radix-4 FFT optimized for local positioning in wireless sensor networks. SSD (2012)
Benjamin Laemmle, Gabor Vinci, Linus Maurer, Robert Weigel, Alexander Koelpin
A 77-GHz SiGe Integrated Six-Port Receiver Front-End for Angle-of-Arrival Detection. IEEE J. Solid State Circuits 47 (9) (2012)
Alban Ferizi, Philipp Baust, Melanie Jung, Georg Fischer, Robert Weigel, Alexander Koelpin
An area-efficient 130 nm CMOS baseband processing unit for 24 GHz FMCW radar positioning. ISSSE (2012)
Francesco Barbon, Gabor Vinci, Stefan Lindner, Robert Weigel, Alexander Koelpin
Signal processing strategies for six-port based Direction of Arrival detector systems. SSD (2012)
Gabor Vinci, Benjamin Laemmle, Francesco Barbon, Robert Weigel, Alexander Koelpin
A 77 GHz direction of arrival detector system with SiGe integrated six-port receiver. RWS (2012)

Alexander Koelpin.css-eqlu8i{font-size:small;padding-left:4px;}

Publication Activity (10 Years)

Top Topics

Top Venues

Alexander Koelpin