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Performance Analysis of Channel Switching with Various Bandwidths in Cognitive Radio
Dynamic spectrum access is a key technique in cognitive radio. Whenever primary users appear, secondary users must evacuate the primary channel rapidly, and switch the appropriate channel to primary users. There are two types of channel access methods, namely reactive and proactive channel access. In reactive method, cognitive radio does not need to switch channel until primary users appear, while in proactive method, secondary users predict future channel traffic by using channel history andfatcat:u3aca4vqsvcljoqubpcdicatqe