Short-distance radar sensing application

Human-related sensing plays a more and more important role because of the emerging applications that include search and rescue, security and surveillance, as well as other important operations. Radar offers a number of unique advantages compared with the other technologies. For instance, the Doppler radar system is cost-effective and can sense the target unobtrusively by penetrating obstacles with lower propagation loss. Due to these characteristics, researchers usually employ the Doppler radar for long-distance object detection. But recently, researchers have started to find that the use of Doppler radar is also a natural choice for human micro-motion sensing. Because Doppler information represents the time rate of change of a range, Doppler radar can suppress stationary clutter to highlight human-related micro-scale movements. The employment of Doppler radar in short-range micro-motion sensing widely broadens the domain of the human sensing network. We highlight the emerging radar sensing applications in the area of home-based smart-health and human biometrics.