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

被引：0
|
作者：
Zhang Z. [1 ]
Li Y. [1 ]
Zhang L. [1 ]
Liu N. [1 ]
机构：
[1] National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an
来源：
Xi'an Dianzi Keji Daxue Xuebao/Journal of Xidian University | 2019年 / 46卷 / 03期
关键词：
Computational complexity; Direction of arrival estimation; Planar array; Subspace reconstruction;
D O I：
10.19665/j.issn1001-2400.2019.03.006
中图分类号：
学科分类号：
摘要：
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. © 2019, The Editorial Board of Journal of Xidian University. All right reserved.
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页码：32 / 38
页数：6
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