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Joint DOA-delay estimation based on space-time matrix method in wireless channel

This paper presents a novel space-time matrix method to jointly estimate the directions of arrival (DOAs) and delays of multipath propagation signals in wireless communications. Using the proposed approach, the DOAs and delays are estimated by the eigenvalues and by eigenvectors of the space-time matrix, respectively. The pairing of the estimated DOAs and delays is automatically determined by the relationship between eigenvalues and eigenvectors. Compared with the previous works, the space-time method can provide better performance with substantially reduced computational complexity. The simulation results show the effectiveness of the proposed algorithm.