A
Alexander Koelpin
Researcher at Hamburg University of Technology
Publications - 299
Citations - 3241
Alexander Koelpin is an academic researcher from Hamburg University of Technology. The author has contributed to research in topics: Radar & Antenna (radio). The author has an hindex of 23, co-authored 276 publications receiving 2427 citations. Previous affiliations of Alexander Koelpin include Brandenburg University of Technology & University of Erlangen-Nuremberg.
Papers
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Journal ArticleDOI
High-Precision Interferometric Radar for Sheet Thickness Monitoring
Sebastian Mann,Christoph Will,Torsten Reissland,Fabian Lurz,Stefan Lindner,Sarah Linz,Robert Weigel,Alexander Koelpin +7 more
TL;DR: An overview of modern sensing technology for steel rolling mills is presented and compared with the proposed measurement system considering the important aspects, i.e., update rate, precision, and thickness limit.
Journal ArticleDOI
Contactless analysis of heart rate variability during cold pressor test using radar interferometry and bidirectional LSTM networks.
Kilin Shi,Tobias Steigleder,Sven Schellenberger,Fabian Michler,Anke Malessa,Fabian Lurz,Nicolas Rohleder,Christoph Ostgathe,Robert Weigel,Alexander Koelpin +9 more
TL;DR: In this paper, the authors presented a contactless approach using a 24 GHz Six-Port-based radar system and an LSTM network for radar heart sound segmentation, which is capable of performing contactless and convenient HRV monitoring and therefore suitable for longterm recordings in clinical environments and home care scenarios.
Proceedings ArticleDOI
A smart jamming system for UMTS/WCDMA cellular phone networks for search and rescue applications
TL;DR: 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 and measurement results will be shown.
Proceedings ArticleDOI
System and signal design for an energy-efficient multi-frequency localization system
Thorsten Nowak,Martin Hierold,Alexander Koelpin,Markus Hartmann,Hans-Martin Tröger,Jorn Thielecke +5 more
TL;DR: The system design aims at extremely light-weight, and thus energy-efficient tags that meet several constraints: low-power signal generation, efficient signal pro-cessing, and, most important, precise range estimation.
Proceedings Article
Six-Port microwave interferometer radar for mechanical vibration analysis
Gabor Vinci,Stefan Lindner,Sebastian Mann,Francesco Barbon,Sarah Linz,Robert Weigel,Alexander Koelpin +6 more
TL;DR: In this paper, an innovative mechanical vibration analysis based on the Six-Port receiver as a microwave interferometer radar is proposed, due to the excellent phase discrimination properties of the six-port receiver a very high accuracy in the vibration detection can be reached.