Publisher DOI: 10.1109/RWS55624.2023.10046319
Title: Long-distance heart sound detection using 122 GHz CW radar with 3D printed high-gain antennas
Language: English
Authors: Albrecht, Nils Christian  
Heyer, Markus 
Wenzel, Marvin  
Langer, Dominik 
Lu, Hui 
Kölpin, Alexander  
Keywords: continuous wave radar; machine learning; vital sign detection
Issue Date: Jan-2023
Publisher: IEEE
Source: IEEE Radio and Wireless Symposium (RWS 2023): 34-36 (2023-01)
Abstract (english): 
This contribution presents a 122 GHz continuous wave (CW) radar system capable of detecting human heart sounds over a distance of at least five meters. A bidirectional long short-term memory (LSTM) neural network is used to extract precise inter-beat-intervals (IBIs) from the radar data. A small-scale human trial with two persons is carried out, and the resulting accuracy of the system is compared to a gold-standard electrocardiogram (ECG). The proposed system shows a mean absolute error of 5 ms and a standard deviation (SD) of 63 ms compared to the ECG IBIs.
Conference: IEEE Radio and Wireless Symposium, RWS 2023 
ISBN: 978-1-6654-9344-4
Institute: Hochfrequenztechnik E-3 
Document Type: Chapter/Article (Proceedings)
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