二维面阵子空间重构快速估计方法

doi:10.19665/j.issn1001-2400.2019.03.006

Abstract

Abstract:

Aiming at the problem of high computational complexity in the estimation of the high-precision direction of arrival of a two-dimensional array, a fast estimation method for high-precision and low computational complexity of a two-dimensional array is proposed. This method first uses the rotational a invariant relationship between the subarrays to complete the two-dimensional angle prediction. Then the estimated angle is used as the prior information, and the signal subspace of the subarray is used to reconstruct the signal subspace of the planar array, and the gradient search is performed to achieve accurate estimation of the two-dimensional angle. Among them, reconstruction of the signal subspace for the planar array effectively reduces the computational complexity when subspace estimation is performed. The gradient search method is used for local search, which declines the computational complexity during search. The estimation accuracy consistent with the classical two-dimensional MUSIC algorithm is obtained. Computer simulation results verify the effectiveness of the proposed algorithm.

Key words: planar array, direction of arrival estimation, subspace reconstruction, computational complexity

CLC Number:

TN911.7

ZHANG Zhenghe,LI Yiyang,ZHANG Linrang,LIU Nan. Fast estimation method for a two-dimensional planar array based on subspace reconstruction[J].Journal of Xidian University, 2019, 46(3): 32-38.

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References 15

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Fast estimation method for a two-dimensional planar array based on subspace reconstruction

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