A Covariance Approximation Method for Near-Field Coherent Sources Localization Using Uniform Linear Array

被引:22
|
作者
Noh, Hoondong [1 ]
Lee, Chungyong [1 ]
机构
[1] Yonsei Univ, Dept Elect & Elect Engn, Seoul 120749, South Korea
关键词
Coherent sources; covariance approximation; focused beamforming (BF); near field; zero-forcing multiple signal classification (ZF-MUSIC); PERFORMANCE; SIGNALS; NOISE;
D O I
10.1109/JOE.2013.2249872
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
The covariance approximation (CA) multiple signal classification (MUSIC) is a novel near-field direction-of-arrival (DoA) estimation method for uniform linear array. In this paper, we show that the CA-MUSIC suffers from significant performance degeneration caused by coherent sources. The CA-MUSIC with coherent sources generates the image sources (IS), which cannot be distinguished from the real sources. To solve this problem, we propose a CA-based near-field coherent sources localization algorithm, which is robust to the IS effect. The proposed CA algorithm avoids errors caused by coherence between sources using searching radius restriction and zero-forcing MUSIC. Simulation results shows that the proposed CA algorithm offers superior root mean square error (RMSE) performances for near-field coherent sources.
引用
收藏
页码:187 / 195
页数:9
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