%0 Journal Article
%T Performance Analysis of Amplify-and-Forward Relay Based Cooperative Spectrum Sensing in Fading Channels
%A Shumon Alam
%A O. Olabiyi
%A O. Odejide
%A A. Annamalai
%J International Journal of Wireless & Mobile Networks
%D 2012
%I Academy & Industry Research Collaboration Center (AIRCC)
%X Relay based cooperative spectrum sensing elevates the spectrum sensing problems in harsh propagationconditions if the relay nodes are positioned suitably for the dynamic spectrum access systems. This articleinvestigates the performance of relay based spectrum sensing (energy detection based) in myriad fadingenvironments using the area under the receiver operating characteristic curve (AUC) performancemetric. AUC is a single statistical parameter, which provides better insight of detection probabilitycompared to the receiver operating characteristic curve (ROC). The article includes the performanceanalysis of two-hop multi-relay amplify-and-forward (AF) relay network with channel state information(CSI) assisted relaying (variable relay gain) and blind (fixed) relay gain. A unified model is alsoinvestigated to describe the relay network for variable and fixed relay gain. Various fading and relayconfigurations are illustrated to show the efficacy of the energy detection based collaborative spectrumsensing in AF relay configuration using the AUC performance metric. Performance of the variable andfixed relay gain based AF relay network are analysed and compared considering different factorsaffecting energy sensing such as the per-hop signal-to-noise ratio (SNR), fading index, and the timebandwidth product. The results can be readily used for the design of the cognitive relay network.
%K Area under Curve
%K Amplify and Forward
%K Cooperative Relay Network
%K Diversity Combining
%K Energy Detector
%K Spectrum Sensing
%U http://airccse.org/journal/jwmn/1012wmn08.pdf