Radar-based vital signs monitoring

This chapter presents the contactless vital signs monitoring through Continuous-Waves (CW) radar sensor. The chapter is divided into two parts: contactless vital signs monitoring through CW radar sensors and contactless vital signs monitoring through frequency-modulated Continuous-Waves (FMCW) radar sensors. The theory and signal-processing algorithm of the radar are introduced. The architectures of the CW/FMCW radar systems are simple, which facilitates the integration of radar technology into compact devices. Commercial CW/FMCW radar front-end transceivers are widely available. With the advantage of strong environmental adaptability, low-power consumption, and penetrability, CW/FMCW radars are promising for contactless vital signs monitoring application. This chapter introduces their potential application in cardiopulmonary monitoring, cancer medical application, and indoor human tracking.