By Wei Wang
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1. Scheme of the partially cooperative network B Totally Cooperative Network Cognitive users cooperatively transmit each others sensing information, and then send sensing information to the fusion centre. Fusion center Primary user Cognitive user Fig. 2. 2 Distributed Sensing In the case of distributed sensing, cognitive users share information among each other but they make their own decisions as to which part of the spectrum they can use. Distributed sensing is more advantageous in the sense that there is no need for a backbone infrastructure.
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Cognitive Radio Systems by Wei Wang