On the Signal Processing in the Life-Detection Radar Using an FMCW Waveform

The progresses and difficulties faced in the life-detection radar signal processing are introduced in the paper. First, the progresses in signal processing are shown, including obtaining the breathing and heartbeat frequency by using self-correlation process and composing the mode vector to discriminate a life by using time-spectrum analysis and singular value decomposition. Then, the difficulties faced now are discussed. Echoes from the obstructions in the direction of radar antenna are main interference. How to control the interferences are discussed and a combinative approach of body movement and life information detection is brought forward in the paper.