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Abstract
Cognitive Radio (CR) is the need of an hour due to the rising demands of spectrum with increasing wireless devices and population. It is a fact that the bandwidth has already exceeded, but interestingly the spectrum is not fully utilised. From the report of FCC the license band are still underutilised which bring hope to fulfil the rising demands. CR based communication is taken under study in this paper. The system with 25 nodes is implemented and analysed.