A Method for Estimating 2D Direction of Arrival Based on Coprime Array with L-Shaped Structure

被引：1
|
作者：
Yang X. [1 ]
Liu L. [1 ]
Li L. [2 ]
机构：
[1] College of Information and Telecommunication, Harbin Engineering University, Harbin
[2] Department of Information System, Dalian Naval Academy, Dalian, 116018, Liaoning
来源：
Liu, Lutao | 1600年 / Xi'an Jiaotong University卷 / 54期
关键词：
2D-DOA estimation; L-shaped coprime array; Matrix reconstruction; Pair matching;
D O I：
10.7652/xjtuxb202002018
中图分类号：
学科分类号：
摘要：
A novel method for estimating 2-dimensional direction of arrival (2D-DOA) based on matrix reconstruction of L-shaped coprime array is proposed to deal with the problem that the L-shaped uniform linear array (ULA) of radars cannot be used in practical application because of the small distance between the adjacent elements. Firstly, the virtual ULA is determined according to the position of the coprime array. Since the virtual ULA has the characteristics of semi-positive definite (SPD), low rank and Toeplitz structure, optimization is conducted to reconstruct a virtual ULA covariance matrix based on the covariance matrix of the data received by the coprime array. Then, the MUSIC algorithm is applied to estimate two 1D angles. Finally, the pair matching method is used to match estimated 1D angles. Simulation results and comparisons with L-shaped ULA MUSIC algorithm and L-shaped coprime array SS-MUSIC algorithm show that when the signal-to-noise ratio is greater than 0 dB and the number of snapshots is greater than 50, the RMSE of the proposed algorithm is less than 0.8°and the smallest spacing of discernable angles is 5°, which illustrates the superiority of the proposed algorithm in both estimation accuracy and resolution. © 2020, Editorial Office of Journal of Xi'an Jiaotong University. All right reserved.
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页码：144 / 149and188
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