An improved adaptive beamforming method for spatially non-collocated vector sensor array

摘要

To reduce the mutual coupling effects among the collocated electromagnetic vector sensor and enhance the performance of the joint space-polarization filtering, an improved adaptive beamforming method is proposed for non-collocated vector sensor array in this paper. First, the distributed array geometry composed of the crossed dipole pair and the signal model are introduced. Second, theoretical derivation of the improved method is discussed. By projecting the weight vector of the joint space-polarization minimum variance distortionless response (SPMVDR) onto a signal subspace, the optimal weight vector of the improved method is obtained. The projection operation generates a lower power of the output noise and improves the signal to interference plus noise power ratio (SINR) compared with the conventional SPMVDR. Computer simulation results indicate that the improved algorithm can achieve a good joint filtering performance and enhance the robustness to array pointing error.