Coherent Targets DOA Estimation Using Toeplitz Matrix Method with Time Reversal MIMO Radar

Abstract

In this letter, the direction of arrival (DOA) estimation for multi-input multi-output (MIMO) radar in multipath environment is investigated. The signal model is based on the assumption that the signal is transmitted by widely spaced antennas and received by some uniform linear arrays (ULAs). A novel method, which includes optimizing the transmitter multipath variable by r − t mixed norm and the receiver multipath variable by peaks searching method, is proposed based on the received signal model. The method can use the multipath echo power to make the estimation performance better, especially with the increase of the transmit antennas or ULAs. Simulation results verify the usefulness of our method.