DOA estimation approach using sparse representation for sparse line array

A new DOA estimation algorithm based on the sparse approximate representation of the received signals is proposed. Compared with subspace algorithms, the new algorithm with superresolution, needn´t a priori information of the number of signals, therefore it can deal with coherent signals. In the novel method, mixed norm combined 0-norm and 2-norm is used to aid sparse approximate representation, then the number of signals and signals´ DOA estimation is obtained. The numeric results show good agreement with the proposed theorem.