Journal of Beijing University of Posts and Telecommunications

  • EI核心期刊

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (5): 41-46.doi: 10.13190/jbupt.201005.41.365

• Papers • Previous Articles     Next Articles

Performance Analysis of the Spectrum Sharing Scheme Based on Detection Results in Cognitive Relay Networks

  

  • Received:2009-10-27 Revised:2009-12-02 Online:2010-08-28 Published:2010-06-15

Abstract:

A spectrum sharing scheme is proposed that allows the cognitive users to select either direct transmission or cooperative underlay transmission adaptively according to the spectrum detection in cognitive relay networks. Moreover, analysis on the cognitive network with this scheme is presented. Based on signaltointerference and noise ratio (SINR), the closedform expressions of outage probability and the symbol error probability are derived. Simulation shows that this scheme can achieve better performance than the traditional overlay scheme and underlay scheme in guaranteeing the primary link and enhancing the performance of the cognitive network.

Key words: cognitive relay networks, spectrum sharing, outage probability, symbol error probability

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