Selecting Target Range with Accurate Vital Sign Using Spatial Phase Coherency of FMCW Radar

Respiration and heartbeat are basic indicators of the physiological state human beings. Frequency-modulated continuous wave (FMCW) radar can sense micro-displacement in body surface without contact, is used for vital-sign (respiration heartbeat) monitoring. For extraction vital-sign, it essential to select target range containing information. In this paper, we exploit coherency phase different range-bins FMCW effectively that contain accurate signals remote monitoring respiration heartbeat. To quantify coherency, spatial (SPC) index introduced. The experimental results show SPC a range-bin more than conventional methods. This result demonstrates proposed method vital signs by using radar.