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http://dx.doi.org/10.7840/kics.2015.40.2.253

A Threshold Optimization Method for Decentralized Cooperative Spectrum Sensing in Cognitive Radio Networks  

Kim, Nak-Kyun (Incheon National University Department of Electronic Engineering)
Byun, Youn-Shik (Incheon National University Department of Electronic Engineering)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.40, no.2, 2015 , pp. 253-263 More about this Journal
Abstract
Lately, spectrum sensing performance has been improved by using cooperate spectrum sensing which each results of sensing of several secondary users are reported to the fusion center. Using Cognitive Radio, secondary user is able to share a bandwidth allocated to primary user. In this paper, we propose a new decentralized cooperative spectrum sensing scheme which compensates the performance degradation of existing decentralized cooperative spectrum sensing considering the error probability of the channel which sensed result of the secondary user is delivered to the fusion center in decentralized cooperative spectrum sensing. In addition, a sensing threshold optimization of minimizing the error probability of decentralized cooperative spectrum sensing is introduced by deriving the equation and the optimal sensing threshold has been confirmed to maximize the decentralized cooperative spectrum sensing performance.
Keywords
cognitive radio; spectrum sensing; cooperative sensing; reporting error; optimal threshold;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
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