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영어

In this paper, a DOA estimation method using subarray and spatial smooth is proposed. The DOA is then estimated based on the computation of the phase shift between the reference signal and its phase shifted signal. To significantly improve the robustness of DOA estimation and of beamforming and to estimate azimuth angle in multipath mobile channel environment, we developed techniques for applying spatial smooth subarray method to arrays of linear geometry. We developed method for applying spatial smooth subarray to arrays of arbitrary geometry. We study the cause of ambiguities in a multiple signal environment and find the necessary and sufficient conditions for an array manifold to be ambiguity free. We show that can be the application of our method MUSIC and adaptive beamforming method. The estimation results are verified by simulations.