Improved two‐dimensional DOA estimation for three‐parallel nested arrays
Fenggang Sun, Jiefang Wu, Peng Lan · Electronics Letters · 2022
Abstract An improved two‐dimensional direction of arrival (DOA) estimation algorithm is proposed for three‐parallel nested arrays. To achieve a balanced estimation, array aperture is extended from two aspects, that is, virtual difference coarray construction of nested arrays and sparsely displaced parallel arrays. A new DOA extended matrix is formed by fully utilizing the auto‐covariance and cross‐covariance matrix among subarrays. Finally, a reduced dimensional estimation method is proposed without spectral search. Simulations verify the effectiveness of the proposed algorithm.