Two-dimensional human tracking using a three-element Doppler and direction-of-arrival (DDOA) radar

We investigate the use of a low-cost, three-element receiving array for two-dimensional direction-of-arrival (DOA) sensing of multiple movers. The concept entails resolving the Doppler frequencies of the returned signals from the moving targets, and then measuring the phase difference at each Doppler frequency component to calculate the DOA of the targets. The three-element receiving array is configured to provide simultaneous DOA measurements in both the azimuth and elevation planes. An experimental system is constructed to test the concept and measurement results of multiple movers are presented.