Abstract：Due to the application requirement of adaptive-adaptive dimension reduction method in large-scale passive sonar array, a blind separation adaptive-adaptive beamforming algorithm is presented, which combines the Independent Component Analysis (ICA) with the traditional adaptive-adaptive approach. The ICA approach is firstly used to obtain the steering vectors of signal sources without prior information of signal direction. Then, the adaptive-adaptive approach is utilized to reduce signal dimension in beam space and robust adaptive approach is finally used for beamforming. The simulation studies verify the effectiveness of the proposed algorithm for computation burden reduction of large-scale array adaptive processing. Furthermore, the beamforming results and robustness of the proposed algorithm is similar to that of full- array adaptive method.
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