A robust beamforming algorithm based on blind source signal separation and oblique projection matrix reconstruction is proposed to solve matrix reconstruction beamforming algorithms'sensibility to array amplitude-phase errors.Firstly,this method is based on blind source separation technique to obtain received signal and mixing matrix,combining with the prior information of interest signal to complete its signal steering vector search.Then,using the signal covariance matrix obtained from blind source separation to estimate array amplitude-phase errors.Finally,based on the mixed matrix and oblique projection idea of amplitude-phase error calibration,the proposed algorithm constructs oblique projection operators for each interference,with the projection of the received data into the interference oblique projection space,which obtains the corresponding interference signal and complete the reconstruction of the interference noise covariance matrix.The simulation results show that the proposed method has good robustness to the array amplitude-phase errors,which verifies the effectiveness of the proposed algorithm.
关键词
鲁棒波束形成/矩阵重构/幅相误差/盲源信号分离/斜投影
Key words
robust beamforming/matrix reconstruction/amplitude-phase errors/blind source signal separation/oblique projection
维普
万方数据