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Outage Analysis of Dual-hop Cognitive Networks with Relay Selection over Nakagami-m Fading Environment

  • Zongsheng Zhang EMAIL logo and Xurong Pi
Published/Copyright: August 19, 2014
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Abstract

In this paper, we investigate the outage performance of decode-and-forward cognitive relay networks for Nakagami-m fading channels, with considering both best relay selection and interference constraints. Focusing on the relay selection and making use of the underlay cognitive approach, an exact closed-form outage probability expression is derived in an independent, non-identical distributed Nakagami-m environment. The closed-form outage probability provides an efficient means to evaluate the effects of the maximum allowable interference power, number of cognitive relays, and channel conditions between the primary user and cognitive users. Finally, we present numerical results to validate the theory analysis. Moreover, from the simulation results, we obtain that the system can obtain the full diversity.

PACS: 73.20.Mf
Received: 2013-11-18
Published Online: 2014-8-19
Published in Print: 2014-9-30

©2014 by Walter de Gruyter Berlin/Boston

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