A novel beamforming scheme for reception of coherent signals is proposed. The scheme first uses estimates of directions-of-arrival (DOAs) of coherent sources to construct a signal-blocking (SB) transformation which removes the desired signal with interference and noise retained. The SB transformed data is then utilized to determine the interference-blocking (IB) subspace for suppressing interference. Finally, an optimum beamforming is performed based on the IB data consisting only of the desired signal and noise to produce maximum output signal-to-interference-plus-noise ratio (SINR). Numerical examples confirm that the proposed scheme can achieve a quite stable output SINR, closer to the optimum one, even in large DOA estiamtion errors.
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