A Simple Adaptive Beamforming Method in the Presence of Coherent Interferences

A new simple adaptive beamforming method is proposed for the coherent environment in this paper. With the new method, the eigenvector, corresponding to the combination of the desired signal and the coherent interferences, is estimated. Then, the components of the desired signal and the coherent interferences in the covariance matrix are subtracted in the eigen-sense. Finally, adaptive beamforming is performed on the pre-processed covariance matrix. By this means, signal cancellation can be avoided. The proposed method needn´t estimate the DOAs of the coherent interferences, and has a lower computational complexity. Simulations demonstrate its validity