Abstract
In electromagnetically crowded mobile communication systems, adaptive antennas employed at the base station often experience simultaneous reception of strong cochannel and impulsive interferers impinging into the main beam of the array along with the desired signal. This results in performance degradation of the angle of arrival estimation schemes in supplying the accurate look-direction information to the beamformer. In the Letter, a simple and effective adaptive antenna scheme is devised to prevent the desired signal cancellation in the optimal weight vector computation of the beamformer without resorting to the derivative or other higher order constraints in the angular region of interest.
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