基于伪协方差矩阵的频率和角度联合估计算法Jointfrequency-angle.PDFVIP

第 28 卷第 8 期 通 信 学 报 Vol.28 No.8 2007 年 8 月 Journal on Communications August 2007 基于伪协方差矩阵的频率和角度联合估计算法 顾建峰, 魏平 ( 电子科技大学 电子工程学院，四川 成都 610054) 摘 要：提出了一种计算简单并且具有很好统计性能的色噪声环境下频 和角度联合估计算法。假设噪声的时间相 关长度小于信号的时间相关长度来消除噪声的影响，而后利用足够的时间相关来构成伪协方差矩阵，并对其进行奇 异值分解获得信号频 ，最后利用一一对应的一维有哪些信誉好的足球投注网站方法获得角度估计值。最后数值仿真结果证实了所提方法不 仅 由于阵列的扩展效应而使得角度估计性能的优越，而且在很小计算负担的条件下频 估计也给出较好的性能。 关键词：阵列信号处理；伪协方差；联合估计 ；角度 ；频 中图分类号：TN911.23 文献标识码 ：A 文章编号：1000-436X(2007)08-0040-06 Joint frequency-angle estimation using a pseudocovariance matrix GU Jian-feng,WEI Ping (De artment of Electronic Engineering, University of Electronic Science and Technology, Chengdu 610054, China) Abstract: A computationally simple oint frequency and angle estimation method with good statistical performance was proposed. The proposed method eliminates the effect of additive noise under the assumption that the temporal-correlation length of the noise field is shorter than that of the signals, and constructs a pseudocovariance matrix by exhibiting a suffi- cient temporal correlation to obtain the frequency estimation by implementing the singular value decomposition(SVD) of it, then the angles were obtained one-by-one using 1-D searches. Finally, it is shown that the proposed method is superior in estimating the angles because of the aperture extension and offers good estimation performance of the frequencies at the low computational burden through numerica