Non-Contact Vital Signs Monitoring for Multiple Subjects Using a Millimeter Wave FMCW Automotive Radar

Technology for in-cabin non-contact monitoring of driver vital signs is a growing area of interest for automotive applications. This has been spurred in part by successful demonstrations of remote sensing of human physiological motion using radar, for healthcare applications such as measurement of average heart rate and heart rate variability, respiratory tidal volume, and sleep apnea diagnostics. However, most reported physiological radar results have focused on the use of continuous wave (CW) radar operating between the 2.4 GHz up to 24 GHz, to monitor a single, isolated subject. There is a recent paradigm shift in the automotive radar industry towards the use of W-band frequency modulated continuous wave (FMCW) radar for achieving accuracy benefits in range, velocity and target angle assessment. This research investigates the feasibility of extracting vital signs information for both single and multi-subject scenarios, utilizing a newly developed 76-81 GHz FMCW single channel architecture automotive radar module.