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In this paper, we propose a efficient primary user detection method in cognitive radio (CR). We adopt a delay diversity receiver for solving problems of the conventional spectrum detector utilizing multiple antennas, which are the increase in hardware complexity and cost. From simulation results, it is demonstrated that the primary user detector with delay diversity receiver has almost half complexity and shows similar or improved performance as compared with that employing multiple antennas.
Date of Conference: 28-30 Sept. 2009