Novel Signal Processing Techniques for Doppler Radar Cardiopulmonary Sensing
01 January 2009
In this paper, we develop new signal processing techniques for Doppler radar cardiopulmonary sensing. These techniques enable independent recovery of respiration and heartbeat signals from measurements of chest- wall dynamic motion, which are subsequently used for independent estimation of respiration and heart rate. In particular, a generic model in the complex plane is formulated to visualize production of the desired chest- wall displacement signal along with various interfering signals. From this, algorithms are derived for arc length demodulation and cardio/pulmonary separation. A test signal generator is developed to simulate actual signals. Also, an experimental setup is presented and several sets of real data are analyzed using the new signal processing techniques.
