Cramer-Rao bound for target velocity estimation in MIMO radar with widely separated antennas

This paper studies the velocity estimation performance for multiple-input multiple-output (MIMO) radar. MIMO radar employing widely dispersed antennas has an advantage in dealing with moving targets. By transmitting orthogonal waveforms MIMO radar can separate these waveforms at each receive antenna and has the ability to observe targets from different directions simultaneously. Unlike conventional radars with co-located antennas, the difficulty of processing targets with small radial velocities is avoided. In this paper, the Cramer-Rao bound is developed for velocity estimation in MIMO radar. It is shown that the antenna placement affects the estimation accuracy significantly.