Angle estimation for monostatic MIMO radar based on Multistage Wiener Filter

In this paper, an angle estimation algorithm for monostatic Multiple-Input Multiple-Output (MIMO) radar based on Multistage Wiener Filter (MSWF) is present. Firstly, a reduced dimensional transformation matrix can be utilized to transform the high dimensional received signal data into low dimensional one. Then the signal subspace can be obtained by forward recursion of the Multistage Wiener Filter. The root polynomial of direction of arrival (DOA) estimation can be constituted by signal subspace, and the DOA can be obtained by root-MUSIC. The proposed method avoids not only the estimate of the covariance matrix and its eigendecomposition, but also the angle searching. Thus, the proposed method has lower computational complexity. Simulation results show that the proposed algorithm has better estimation performance than other methods.