一种接收相干信号的盲多波束形成方法
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摘要
在假设期望信号是从不同角度入射的相干信号,干扰信号相互独立且与期望信号独立的条件下;基于独立信号的协方差矩阵是Teoplitz矩阵的特性,提出了一种能有效接收相干信号的盲多波束形成方法。该方法首先通过接收信号的协方差矩阵构造出相干信号的数据矩阵,然后根据相干信号的合成导向矢量与相干信号的数据矩阵的噪声子空间正交的特性,估计出相干信号的合成导向矢量。最后通过MVDR算法得到该波束形成器的阵列加权矢量。仿真表明了该算法的可行性和优越性。
A new blind beamforming method for coherent signals based on the Teoplitz property of the covariance matrix of uncorrelated interferences with the assumption that the desired signals are coherent signals from different directions in the presence of uncorrelated interferences is proposed in this paper.The idea and the procedure of the scheme are given.First,the data matrix of the coherent signals can be constructed by using the covariance matrix of the received data.Second,the estimated composite steering vector can be obtained based on the orthogonal property of the composite steering vector and the noise subspace of the data matrix of the coherent signals.Finally,the weight vector of the proposed beamformer can be obtained through MVDR algorithm.The simulation results show the feasibility and superiority of this method.
A new blind beamforming method for coherent signals based on the Teoplitz property of the covariance matrix of uncorrelated interferences with the assumption that the desired signals are coherent signals from different directions in the presence of uncorrelated interferences is proposed in this paper.The idea and the procedure of the scheme are given.First,the data matrix of the coherent signals can be constructed by using the covariance matrix of the received data.Second,the estimated composite steering vector can be obtained based on the orthogonal property of the composite steering vector and the noise subspace of the data matrix of the coherent signals.Finally,the weight vector of the proposed beamformer can be obtained through MVDR algorithm.The simulation results show the feasibility and superiority of this method.
引文
[1]陈杰.采用智能天线阵的无线通信系统研究和设计[D].西安:西安电子科技大学,2013.
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[4]ZHANG L,SO H C,PING L,et al.Effective Beamformer for Coherent Signal Reception[J].Electronics Letters,2003,39(13):949-951.
[5]ZHANG L,SO H C,PING L,et al.Adaptive Multiple-Beamformers for Reception of Coherent Signals with Known Directions in the Presence of Uncorrelated Interferences[J].Signal Processing,2004,84(10):1861-1873.
[6]赵永波,张守宏.存在相干信号时的最优波束形成[J].通信学报,2002,23(2):113-121.
[7]安春莲.独立信号与相干信号并存的测向算法研究[D].哈尔滨:哈尔滨工程大学,2013.
[8]何鲁青.智能天线算法研究[D].济南:山东大学,2014.
[2]刘小忠,闵威,张孟达,等.宽带独立信号和相干信号的DOA估计[J].雷达科学与技术,2014,12(6):619-622,628.
[3]BRESLER Y,REDDY V U,KAILATH T.Optimum Beamforming for Coherent Signal and Interferences[J].IEEE Trans on Acoustics,Speech,and Signal Processing,1988,36(6):833-843.
[4]ZHANG L,SO H C,PING L,et al.Effective Beamformer for Coherent Signal Reception[J].Electronics Letters,2003,39(13):949-951.
[5]ZHANG L,SO H C,PING L,et al.Adaptive Multiple-Beamformers for Reception of Coherent Signals with Known Directions in the Presence of Uncorrelated Interferences[J].Signal Processing,2004,84(10):1861-1873.
[6]赵永波,张守宏.存在相干信号时的最优波束形成[J].通信学报,2002,23(2):113-121.
[7]安春莲.独立信号与相干信号并存的测向算法研究[D].哈尔滨:哈尔滨工程大学,2013.
[8]何鲁青.智能天线算法研究[D].济南:山东大学,2014.