REAL TIME UNOBTRUSIVE MONITORING OF PHYSIOLOGICAL SIGNALS

摘要

To provide an inexpensive and easily replicable pseudo IQ radar based system, relating to a method and system for real time unobtrusive monitoring of physiological signals of a subject confined to a bed, thereby solving problems that output of single channel continuous wave (CW) radars are dependent upon a distance to the subject from the radar and that dual channel IQ radars are more accurate but are costly and availability in the market is a constraint.SOLUTION: The pseudo IQ radar comprises two CW radars placed at a calibrated distance from each other such that optimum points of one CW radar spatially overlaps null points of the other CW radar and phase imbalance is suppressed. Three such pseudo IQ radars are positioned in a predetermined configuration around the subject being monitored. A Supervised Complex Signal Demodulation (SCSD) method configured to suppress amplitude and DC imbalance is also provided for evaluating the physiological signals.SELECTED DRAWING: Figure 1