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《Journal of China Institute of Communications》 2002-02
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Optimum beamforming for coherent signals

ZHAO Yong-bo, ZHANG Shou-hong (Key Lab for Radar Signal Processing, Xidian University, Xi抋n 710071,China)  
This paper presents a new method of optimum beamforming in the presence of coherent signals. The method first uses estimates of the source directions to construct a transformation , which removes the desired signal and the coherent signals. The uncorrelated interference subspace and its orthogonal complementary space are obtained with the transformed data. The projected vector of the composite steering vector onto the orthogonal complementary space is gotten and used as the weight vector. The theoretical analysis indicates that the proposed method is nearly identical to the optimum method. The proposed method can been applied to an array of arbitrary geometry and is robust to the estimation errors of the source directions. Computer simulation results demonstrate the effectiveness of the proposed method.
【CateGory Index】: TN957.52
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