An eigenanalysis interference canceler with robust capabilities

This paper incorporates robust capability into adaptive array beamforming based on the eigenanalysis interference canceler (EIC). It has been shown that the EIC demonstrates the advantages of fast convergence speed and maximal suppression of interference over the conventional beamformers. However, the performance of the EIC is very sensitive to a pointing error, especially when the interference number is overestimated. Projecting the incorrect steering vector onto the signal subspace, we present a robust technique where an appropriate blocking matrix is constructed in the EIC to mitigate the effect of the pointing error. Employing the corrected steering vector, the signal cancellation can be overcome even if the interference number is overestimated. Computer simulations are provided to illustrate the robust capability of the proposed technique. © 2000 John Wiley & Sons, Inc. Microwave Opt Technol Lett 25: 100–103, 2000.