DOA Estimation in Impulsive Noise Environments Using Fractional Lower Order Spatial-Temporal Matrix

This paper is concerned with the direction-of-arrival estimation problem in impulsive noise modeled as symmetric α-stable(SαS) distribution.A generalized fractional lower order spatial-temporal matrix(FSTM) of the array measurements is defined.Theoretical analysis shows that the matrix FSTM can be used to obtain the estimation of noise subspace.Then a new DOA estimation algorithm using subspace-based techniques is proposed.The algorithm is much efficient to restrain the strong impulsive noise for low signal-to-noise ratio(SNR) case.Simulation results demonstrate the effectiveness of the proposed algorithm.