Adaptive processing and realistic signal propagation modeling for multiantenna vital sign radar

This paper addresses the problem of vital sign estimation using radar equipped with multiple receive antennas. We analyze the use of different adaptive processing techniques to extract and enhance the information of the micro-Doppler effect from vital signs on the radar signal from multiple antennas. These techniques are shown to provide an increase in vital sign estimation accuracy, and enable operation at lower SNR conditions. The results are based on extensive simulations using a realistic propagation model. Furthermore, we demonstrate the performance by real-world measurements using two 24 GHz CW radars.