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Performance Evaluation of a Cooperative Spectrum Sensing using the k-out-of-n Fusion Rule in CR Networks  

Lee, Sang-Wook (부경대학교 전자공학과 통신시스템 연구실)
Lim, Chang-Heon (부경대학교 전자컴퓨터정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.34, no.5A, 2009 , pp. 429-435 More about this Journal
Abstract
Cooperative spectrum sensing allows secondary users of a cognitive radio(CR) network to collaborate to determine whether a primary user occupies the spectrum of interest or not. It usually performs spectrum sensing by combining the individual decisions of each second user into a final one and the k-out-of-n fusion rule is a general approach for decision fusion. This rule declares that the spectrum is occupied only when the decisions from more than k-1 secondary users indicate the presence of a primary user. In this paper, we analyze a cooperative spectrum sensing scheme with the fusion rule under the constraint that its detection probability is maintained to be no less than a given level and its numerical results for the case of a CR network with 10 secondary users.
Keywords
cognitive radio; cooperative spectrum sensing; fusion rule;
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