Blind separation of Human Heartbeats and Respiration by the use of a Doppler Radar Remote Sensing

The combined use of a Doppler radar with digital signal processing technique gives an effective non-invasive remote sensing of heart beat signals. Initial results have showed that the proposed technique is very promising in successfully isolating desired heart beat signals from other mobile objects and other distortion effects characterizing the wireless channel. We concentrate in this paper on the harder problem of separating the signals from two subject in the same room. We show that preliminary results obtained by the Real Analytical Constant Modulus Algorithm (RACMA from [2]) and the Independent Component Analysis (ICA from [8]) on experimental data are very promising into this goal. Index Terms — Blind Source Separation, Antenna Array, Doppler Radar, Remote Sensing, Heartbeat Detection, Real Analytical Constant Modulus Algorithm, Independent Component Analysis. ACKNOWLEDGEMENT This research was sponsored by NSF under contract ECS0428975.