Random Body Movement Cancellation Method for FMCW Radar Vital Sign Detection

Non-contact measurement of vital sign using FMCW radar is important to rescue missions and health care. It is very difficult to separate respiratory and heartbeat waveforms in the condition of random body movement (RBM). This paper presents a method in two conditions to compensate RBM for non-contact vital sign detection. Small movement in fixed range-bin, computing the energy and determine if it is to be scaled to reduce motion noise. To handle with outside range-bin RMB, range-bin tracking of movement calibration (RBTMC) method was proposed. The experimental result reveals that the proposed method is effective to reduce influence of RBM.