In this paper, we propose co-prime arrays for effective direction-of-arrival (DOA) estimation.To fully utilize the virtual aperture achieved in the difference co-array constructed from a co-prime array structure, sparsity-based spatial spectrum estimation technique is exploited.Compared to existing techniques, the proposed technique achieves better utilization of the co-array aperture and thus results in increased degrees-of-freedom as well as improved DOA estimation performance.

Sparsity-based DOA estimation using co-prime arrays