Joint DOD and DOA estimation for MIMO radar with lower snapshots
Wang Xianpen · Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University · 2014
The angle estimation performance of subspace algorithms based on the second order statistical characteristic is seriously descended with low snapshots in multiple-input multiple-output( MIMO) radar,even invalid with single snapshot. In order to solve this problem,a joint two-dimensional spatial smoothing multi-objective DOD and DOA estimation algorithm with enlarged array aperture is proposed. The proposed algorithm constructs a joint twodimensional spatial smoothing for both transmit array and receive array,and enlarges the aperture of array by exploiting the shift invariance property of the virtual array in MIMO radar. Then the DOD and DOA can be estimated by ESPRIT,which are paired automatically. Compared with the second order statistical characteristic based subspace algorithms,the proposed method provides better angle estimation performance with lower snapshots. Furthermore,the proposed method is suitable for single snapshot. Simulation results are presented to verify the effectiveness and advantages of the proposed method.