Joint DOD–DOA Estimation Based on Signal Subspace Approach in MIMO Radars

Abstract

This paper deals with joint direction of departure (DOD) and direction of arrival (DOA) estimation using a subspace-based approach in bistatic multiple-input multiple-output radars. First, a conventional rotational invariance technique is used to estimate DOD. Then the steering vector of DOA corresponding to the estimated DOD is obtained using the proposed signal subspace estimation method. The steering vector is then converted to the angle of arrival. This way, the DOD and DOA pairing are automatically obtained. Numerical simulations show that the estimated angles using the proposed approach are more accurate than those using the conventional methods.