DOA estimation for coherent signals with symmetric virtual array

Abstract

A new direction of arrival (DOA) estimation method for the uniform linear array is proposed for correlated non-circular source signals. The new DOA estimation method applies a Toeplitz matrix reconstruction method to decorrelate the signals directly without using spatial smoothing. The method makes full use of the array aperture and achieves complete decorrelation. Therefore, the algorithm is suitable for DOA estimation for real-valued coherent signals with a small number of snapshots or low SNR. Simulation results demonstrate the validity and efficiency of the proposed method.