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	基于奇异协方差矩阵的谱估计方法
	苏志刚 ; 彭应宁 ; 吴仁彪 ; SU Zhigang ; PENG Yingning ; WU Renbiao
	2010-05-12 ; 2010-05-12
关键词	雷达数据处理 谱估计 匹配滤波 radar data processing spectral estimation matched filter TN957.5
其他题名	Spectral estimator with rank-deficient covariance matrix
中文摘要	为了解决秩亏RCF(robust Capon filter-bank)谱估计方法的估计性能不稳健问题,提出一种基于奇异协方差矩阵的谱估计方法。该方法根据空间约束和导向矢量误差约束获得相应的窄带滤波器,并利用其对Capon滤波矢量进行滤波得到谱估计。仿真结果表明:在采样协方差矩阵奇异的情况下,该谱估计方法获得的谱估计在精度及分辨率上均明显优于秩亏RCF谱估计方法。该方法是一种可以利用少量快拍进行谱估计的有效方法。; A spectral estimator based on the rank-deficient sample covariance matrix was developed to improve the robustness of estimates of the rank-deficient robust Capon filter-bank(RCF) spectral estimator.The estimator utilizes constraints on both the subspace and the errors of steering vectors to design a narrow filter.The filter outputs the spectral estimate with the filtering vector as its input.The filtering vector is formed by weighting snapshots with the Capon weight.Simulation results for a singular sample covariance matrix show that the spectral estimator obtains the spectral estimates with better accuracy and resolution than the rank-deficient RCF spectral estimator.Thus the estimator is an efficient estimator which utilizes only a few snapshots to estimate the spectrum.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/28046]
专题	清华大学
推荐引用方式 GB/T 7714	苏志刚,彭应宁,吴仁彪,等. 基于奇异协方差矩阵的谱估计方法[J],2010, 2010.
APA	苏志刚,彭应宁,吴仁彪,SU Zhigang,PENG Yingning,&WU Renbiao.(2010).基于奇异协方差矩阵的谱估计方法..
MLA	苏志刚,et al."基于奇异协方差矩阵的谱估计方法".(2010).

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