Estimation of DOD and 2D-DOA and polarizations for bistatic MIMO radar

Multi-parameter estimation is investigated for target discrimination and localization in multiple-input multiple-output (MIMO) radar system. With an M-element uniform linear array in the transmitter and a square array consisting of N² pair of crossed-dipoles in the receiver, a novel method is proposed for joint estimation of direction-of-departures (DODs), two-dimensional direction-of-arrivals (2D-DOAs) and polarizations of multiple targets for bistatic MIMO radars. Its signal model is described, and the algorithm is given by exploiting rotational invariance property of ESPRIT and polarization sensitive array processing technology in transmit and receive arrays. To discriminate and localize targets in a 3-D plane, more information than those of traditional bistatic MIMO radar algorithms is provided using the proposed method. Also, by making use of polarization diversity, its resolution capability is greatly improved when two targets are closely spaced.