Sum and difference coarrays based 2-D DOA estimation with co-prime parallel arrays
Junpeng Shi, Guoping Hu, Xiaofei Zhang, Pan Gong · 2017
This paper proposes a symmetric co-prime parallel array (S-CPPA) configuration for two-dimensional direction of arrival (2-D DOA) estimation. Specifically, the S-CPPA consists of a co-prime pair of symmetric uniform linear subarrays (ULAs). By vectorizing the cross-correlation matrix of the received signals, the sum and difference coarrays perspective is developed to obtain a large number of degrees of freedom (DOFs). Compared with the existing configurations, S-CPPA can achieve a superior performance. Simulation results verify the effectiveness of the proposed configuration using sparse representation and least square algorithms.