Doppler radar vital signs monitoring using wavelet transform

An algorithm using wavelets is used to detect heartbeat rate from a phase modulated Doppler radar signal. It is shown that the heartbeat rate can be detected up to 1.5m from the radar in a noisy environment without the need of filtering. Also the property of wavelet transform to preserve both time and frequency information is utilized to analyze the phase modulated Doppler radar signal giving information about changes in heart beat over very small intervals of time.