WSEAS Transactions on Signal Processing
Print ISSN: 1790-5052, E-ISSN: 2224-3488
Volume 11, 2015
Outage Analysis in Multi-User and Multi-Relay Cognitive AF Relaying Networks Using MRC
Authors: , , , ,
Abstract: This paper investigates the outage performance in multi-user and multi-relay cognitive amplify-andforward relaying networks for MinW relay selection scheme over independent non-identically distributed Rayleigh fading channels, where the eavesdropper node may intercept the source message. To guarantee the quality-ofservice of the primary user (PU), both the maximum tolerable peak interference power at the PU and maximum allowable transmit power at secondary users are considered. Relay selection is employed in this paper to improve the secure transmission from secondary source to secondary destination by minimizing instantaneous signal-tonoise ratio at the eavesdropper. For the considered relay selection scheme, we analyze its outage performance and obtain the closed-form lower and upper bounds as well as asymptotic expressions for reliability outage probability (OP) with maximal ratio combining utilized. From the asymptotic expressions, it can be observed that the diversity gain of OP equals to N + 1, where N is the number of secondary destinations. Finally, Monte-Carlo simulations are presented to validate our analysis results.
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Keywords: Outage probability, amplify-and-forward, cognitive relaying networks, relay selection, maximal ratio combining
Pages: 255-261
WSEAS Transactions on Signal Processing, ISSN / E-ISSN: 1790-5052 / 2224-3488, Volume 11, 2015, Art. #30