Analysis of Energy Detector Based Spectrum Sensing in Fading Cooperative Cognitive Network

Ever increasing wireless services and networks results in spectrum scarcity. But already allocated spectrum is in under utilization in the current static fixed spectrum allocation method .So dynamic spectrum access is only solution for this issue .Spectrum sensing is one of the key technique in cognitive radio for dynamic spectrum access. There are many algorithm proposed for the spectrum sensing. Among all the algorithm energy detector is the only one that is less computationally complex so it is adapted as one of the candidate in 802.22 standard of TV white space based RAN network. Many research work proposed on energy detector based spectrum sensing but all focus on AWN channel of non-fading environment. But real channel is not always non fading one .In case of the cooperative spectrum sensing with different cognitive radio different channel will be experienced, some will be fading .So here in this paper an analysis of energy detector performance on Rayleigh fading environment is going to analyze under cooperative spectrum sensing .Under this analysis the amplify and forward network and indoor cases also considered and performance is studied.