Simulation of a Modified ESB Beamforming Algorithm Based on Unitary Transformation
Jizhou Yu · Jisuanji fangzhen · 2006
To reduce the computation complexity of the eigenspace-based(ESB) adaptive beamforming algorithm and improve the performance of it with a small number of snapshots,a modified eigenspace-based adaptive beamforming algorithm based on an unitary transformation is proposed.The algorithm transforms the complex covariance matrix into a real matrix using an unitary transformation and then the real matrix is inversed and eigen-decomposed for adaptive beamforming so it has a low computation complexity in comparison with the ESB adaptive beamforming algorithm.Due to the forward-backward averaging effect that is equivalent to doubling the number of snapshots during the course of the computation for the transformed matrix,the algorithm can upgrade the performance in the case of the small number of snapshots and raise the output signal-to-interference-plus-noise ratio(SINR). The simulation results in smart antennas show that the proposed algorithm has expected performance.