100 Robust Constrained LSCMA in the Presence of Signal Steering Vector Mismatches

In practical applications, adaptive beamformers can suffer significant performance degradation in the presence of the even slight mismatch between the actual and assumed signal steering vectors. In this paper, a novel robust constrained LSCMA is proposed based on explicit modeling of uncertainties in the desired signal array response. The proposed algorithm provides excellent robustness against the signal steering vector mismatches, improves the array system performance and makes the mean output array SINR consistently close to the optimal one. Computer simulations demonstrate substantial performance improvements of the proposed algorithm compared as linear constrained LSCMA algorithm.