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Multiprocessor platforms have been proposed as an enabling technology for Cognitive Radio. In this paper, the authors explore various FFT implementations on a multiprocessor prototype platform as building components for OFDM based Cognitive Radio. The results show that their FFT implementations on the multiprocessor platform are fast and energy efficient. Moreover, the FFT implementations can be dynamically reconfigured with relatively small reconfiguration overheads. ECENT studies have shown that most of the assigned radio spectrum is underutilized. On the other hand, the increasing number of wireless multimedia application leads to increasing spectrum scarcity.
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