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http://dx.doi.org/10.5515/KJKIEES.2011.22.8.761

A Cooperative K-out-of-n Spectrum Sensing Method Considering Optimal Threshold  

Choi, Moon-Geun (Department of Electronic Engineering, University of Ulsan)
Kong, Hyung-Yun (Department of Electronic Engineering, University of Ulsan)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.22, no.8, 2011 , pp. 761-767 More about this Journal
Abstract
In this paper, to improve performance of spectrum sensing, we propose the method which can find optimal threshold based on power of PU(Primary User) signal. To find optimal threshold value, we will use mathematical method, and find threshold which can has lowest error probability. Each SU(Secondary User) use this threshold and All Su makes local decision. All Su Send local decision to FC(Fusion Center). In this paper we consider K-out-of-n rule to combining local decision. To make global decision value, FC find optimal n. In the FC. FC received local decision which has lowest error probability and using optimal n and these vaule. FC make global decision value. In this paper, to analysis performance proposed scheme, we simulate proposed scheme using matlab and compare with traditional OR Rule. As a result of simulation, we can know that preposed scheme can get a better performance than traditional OR rule.
Keywords
Cognitive Radio; Energy Detection; Cooperative Spectrum Sensing; Optimal Threshold;
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