An eigenanalysis interference canceler with robust capabilities

This paper incorporates robust capability into adaptive array beamforming b ased on the eigenanalysis interference canceler (EIC). It has been shown th at the EIC demonstrates the advantages of ast convergence speed and maximal suppression of interference over the conventional beamformers. However, th e performance of the EIC is very sensitive to a pointing error, especially when the interference number is overestimated. Projecting the incorrect ste ering vector onto the signal subspace, we present a robust technique where an appropriate blocking matrix is constructed in the EIC to mitigate the ef fect of the pointing error. Employing the corrected steering vector, the si gnal cancellation can be overcome even if the interference number is overes timated. Computer simulations are provided to illustrate the robust capabil ity of the proposed technique. (C) John Wiley & Sons, Inc.