Paper Title
Effect of Orientation Misalignments Between Array Elements on Interference Mitigation Performance of Mvdr Beamformer

Abstract
Many studies on achieving robust performance MVDR beamformers have been conducted, but such research assumes that all antenna elements of arrays are perfectly aligned and only the phases of the signals received by the antenna elements differ. However, in practice, no array is perfectly aligned, and the orientations of antenna elements can be misaligned for various reasons. Therefore, in the case of the MVDR beamformer, which assumes perfect alignments, received signals undergo attenuationsowing to orientation misalignments. In this paper, the effect of orientation misalignment between array elements on the interference mitigation performance of the MVDR beamformer is described using polarization concepts.The mathematical expressions for the received signal and array gains in the case of misalignments are derived and compared to the typical signal model and array gain without misalignments. The simulation result confirms the validity of the proposed approach. Keywords� MVDR Beamformer, Robustness, Orientation Misalignment, Polarization, Interference Mitigation.