A Digital Signal Processor for Doppler Radar Sensing of Vital Signs
01 September 2002
A digital signal processor for Doppler Radar sensing of vital signs is described. A voltage waveform signal containing respiration and heartbeat signatures is low-pass filtered (0.7 Hz) for the respiration rate and band-pass filtered (1.0-3.0 Hz) for the heart rate. Using the auto-correlation function, the rate per minute for each of these signals is calculated.