Robust beamforming using beam-to-reference weighting diagonal loading and Bayesian framework

A novel robust diagonal loading (DL) algorithm against steering vector mismatch is proposed. The beam-to-reference ratio is estimated first and then used as a weighting factor for variable DL. The Bayesian framework is applied eventually to obtain the weight vector. In contrast to traditional methods, the proposed method achieves good performance without using any optimisation toolboxes or matrix eigendecomposition operations.