Improved Capon Estimator for High-Resolution DOA Estimation and Its Statistical Analysis

doi:10.1109/JAS.2023.123549

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	Improved Capon Estimator for High-Resolution DOA Estimation and Its Statistical Analysis
	Weiliang Zuo; Jingmin Xin; Changnong Liu; Nanning Zheng; Akira Sano
刊名	IEEE/CAA Journal of Automatica Sinica
	2023
卷号	10 期号:8 页码:1716-1729
关键词	Capon beamformer direction-of-arrival (DOA) estimation large-sample mean-squared-error (MSE) subspace-based methods uniform linear array
ISSN号	2329-9266
DOI	10.1109/JAS.2023.123549
英文摘要	Despite some efforts and attempts have been made to improve the direction-of-arrival (DOA) estimation performance of the standard Capon beamformer (SCB) in array processing, rigorous statistical performance analyses of these modified Capon estimators are still lacking. This paper studies an improved Capon estimator (ICE) for estimating the DOAs of multiple uncorrelated narrowband signals, where the higher-order inverse (sample) array covariance matrix is used in the Capon-like cost function. By establishing the relationship between this nonparametric estimator and the parametric and classic subspace-based MUSIC (multiple signal classification), it is clarified that as long as the power order of the inverse covariance matrix is increased to reduce the influence of signal subspace components in the ICE, the estimation performance of the ICE becomes equivalent to that of the MUSIC regardless of the signal-to-noise ratio (SNR). Furthermore the statistical performance of the ICE is analyzed, and the large-sample mean-squared-error (MSE) expression of the estimated DOA is derived. Finally the effectiveness and the theoretical analysis of the ICE are substantiated through numerical examples, where the Cramer-Rao lower bound (CRB) is used to evaluate the validity of the derived asymptotic MSE expression.
内容类型	期刊论文
源URL	[http://ir.ia.ac.cn/handle/173211/52334]
专题	自动化研究所_学术期刊_IEEE/CAA Journal of Automatica Sinica
推荐引用方式 GB/T 7714	Weiliang Zuo,Jingmin Xin,Changnong Liu,et al. Improved Capon Estimator for High-Resolution DOA Estimation and Its Statistical Analysis[J]. IEEE/CAA Journal of Automatica Sinica,2023,10(8):1716-1729.
APA	Weiliang Zuo,Jingmin Xin,Changnong Liu,Nanning Zheng,&Akira Sano.(2023).Improved Capon Estimator for High-Resolution DOA Estimation and Its Statistical Analysis.IEEE/CAA Journal of Automatica Sinica,10(8),1716-1729.
MLA	Weiliang Zuo,et al."Improved Capon Estimator for High-Resolution DOA Estimation and Its Statistical Analysis".IEEE/CAA Journal of Automatica Sinica 10.8(2023):1716-1729.