Experimental Evaluation of Multiple Antenna Techniques for Remote Sensing of Physiological Motion

In this paper we present a wireless multiple antenna experimental system that is used for remote sensing of physiological motion. We introduce a novel detection algorithm that exploits multiple antennas. The algorithm is based on the analysis of the received signal power spectrum, where a unique cost is assigned to each spectral component. The assigned cost approximates a probability that the measured spectral component is a result of the target's motion. Furthermore, we experimentally evaluate its performance demonstrating the feasibility of the detection of the breathing signal, and demonstrating significant gains due to the application of multiple transmit and receive antennas.