Systematic Heartbeat Monitoring using a FMCW mm-Wave Radar

Radar health monitoring system has been demonstrated superiority in noncontact monitoring of vital signs. However, the heartbeat extraction from radar signal is heavily affected by respiratory interference. For the sake of heartbeat reconstruction accuracy, we propose here a real time systematic hea...

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Bibliographic Details
Published in2021 IEEE International Conference on Consumer Electronics and Computer Engineering (ICCECE) pp. 714 - 718
Main Authors Ji, Shanling, Wen, Haiying, Wu, Jiankang, Zhang, Zhisheng, Zhao, Kunkun
Format Conference Proceeding
LanguageEnglish
Published IEEE 15.01.2021
Subjects
Biomedical monitoring
FMCW radar
Harmonic analysis
Heart beat
heartbeat monitoring
Interference
mm-wave
Monitoring
Power harmonic filters
Radar
systematic method
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Summary:Radar health monitoring system has been demonstrated superiority in noncontact monitoring of vital signs. However, the heartbeat extraction from radar signal is heavily affected by respiratory interference. For the sake of heartbeat reconstruction accuracy, we propose here a real time systematic heart beat monitoring method using Frequency Modulation Continuous Wave (FMCW) mm-wave radar, referred to as SHB. The SHB consists of two major steps. In the enhancement step, the differential operation is applied to FMCW phase variation signal to enhance heartbeat components and harmonics, and band pass filter is used to eliminate the respiration interference. Then in the heartbeat waveform reconstruction step, the heartbeat reconstruction from its harmonics formula is proposed. Finally, a Kalman filter is used to further improve heartbeat waveform quality. The preliminary experimental results have shown the estimated error is 1.97%-4.26%.
DOI:10.1109/ICCECE51280.2021.9342280