Non-Contact Realtime Vital Signs Monitoring System Based on Millimeter Wave FMCW Radar

Accurate measurement of respiration and heartbeat is crucial for assessing the normality of cardiopulmonary activity. This study proposes a novel real-time human vital signs detection method using a 77 GHz frequency-modulated continuous wave (FMCW) millimeter-wave radar. We measure the chest displac...

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Bibliographic Details
Main Authors: Kang, Wenyuan, Ke, Feng, Chang, Yoong Choon
Format: Conference Proceeding
Language:English
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Summary:Accurate measurement of respiration and heartbeat is crucial for assessing the normality of cardiopulmonary activity. This study proposes a novel real-time human vital signs detection method using a 77 GHz frequency-modulated continuous wave (FMCW) millimeter-wave radar. We measure the chest displacement caused by respiration and heart rate in the human body and transmit the collected measurement data to a PC via the UART data port. Subsequently, the data undergo preprocessing. We employ the vector averaging cancellation (VAC) method to remove static clutter and utilize linear interpolation to suppress potential pulse noise. Moreover, we extract the phase information from the signals. During the frequency estimation of the heartbeat signal, we analyze the signal energy to address motion artifacts and mitigate the interference caused by body movement on heart rate estimation. To reduce estimation errors in heart rate, we selectively filter out the respiratory second harmonic component when appropriate, avoiding the strong influence of respiratory signals and their harmonics on heart rate estimation. The determined respiration and heart rate values are then displayed in real-time on the PC. Experimental results demonstrate that this real-time vital sign detection system maintains high detection accuracy while ensuring real-time capability.
ISSN:2837-7109
DOI:10.1109/ICCC59590.2023.10507262