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互耦效应对DOA估计的影响
谢鑫,程国标,路翠华
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(海军航空工程学院，山东烟台 264001;解放军91960部队71分队，广东汕头 51507 3)

摘要:

在均匀线性阵列模型下，结合常规波束形成算法、Capon最小方差无失真响应（MVD R）波束形成算法、MUSIC算法、ESPRIT算法和RootMUSIC算法等几种主要到达角（DOA）估计算法的原理，分析了互耦效应影响这些算法的作用机理，并利用MATLAB进行了数值仿真。理论分析和仿真结果表明，互耦效应带来的误差增大了DOA估计算法的估计误差，降低了估计成功概率，严重影响了算法的性能。

关键词: 均匀线性阵列到达角估计互耦效应波束形成估计误差

DOI：

基金项目:

Impact of Mutual Coupling on Direction of Arrival Estimation

XIE Xin,CHENG Guo-biao,LU Cui-hua

(Naval Aeronautics and Astronautics University, Yantai 264001, China;The 71st Element,Unit 91960 of PLA, Shantou 515073, China)

Abstract:

Using a uniform linear array (ULA) model, the mechanism that how mutua l coupling affects several main DOA(Direction of Arrival) estimation algorithms such as conventiona l beamforming algorithm, Capon′s MVDR algorithm, MUSIC algorithm, ESPRIT algor ithm and RootMUSIC algorithm is analyzed, and then the simulation is performed using MATLAB. The analysis and simulation results show that the errors due to the mutual coupling enhance the errors of DOA estimation algorithms, reduce the probability of success, and degrade the performance of algorithms seriously.

Key words: uniform linear array(ULA) DOA estimation mutual coupling beamforming estimatio n error