Abstract：In this paper, a new DOA and angular spread estimation algorithm for incoherently distributed source is proposed. According to covariance matrix’s structure character of the spatial frequency model of single incoherently distributed source, the covariance matrix can be separated into two matrixes rebuilt by phase information and amplitude information, respectively. Averaging over the main diagonal and sub-diagonals elements of the matrixes, two averaged vectors containing phase information and amplitude information could be obtained. Using least square fitting, the DOA could be estimated from the phase information, the angular spread could be estimated by substituting the estimated DOA into the amplitude information, and thus the decoupled estimation of DOA and angular spread are realized for incoherently distributed source. Numerical examples illustrate the performance of the method.
2010, Vol. 32 
