Non-contact heart rate tracking using Doppler radar

Non-contact vital signs monitoring system based on Continuous-wave (CW) Doppler radar has been becoming more and more attractive in the field of health care. CW Doppler radar has been extensively studied to extract respiration and heart rates, which are vital for many medical applications. This paper will introduce a radar signal processing method, which is able to extract respiration and heart rates from single person. To verify the validity of the method, vital signs signal were acquired from stationary human subjects by a CW Doppler radar unit. The sensor operating at 24 GHZ was located 0.5 meter far from the subject. Reference respiration and heart rates were measured by an ECG monitor and compared with the results tracked by the CW Doppler radar monitoring system. The results showed that the respiration and heart rates were clearly extracted.