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.