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2012 (Vol. 4, Issue: 20)
Article Information:

Outage Performance Analysis in Cognitive Wireless Relay Networks

Wenjing Yue, Zhi Chen, Anyi Wang, Luoquan Hu and Lei Wang
Corresponding Author:  Wenjing Yue 

Key words:  Cognitive radio , cognitive relay networks, outage performance, power control, , ,
Vol. 4 , (20): 3958-3964
Submitted Accepted Published
December 20, 2011 April 20, 2012 October 15, 2012

The analysis the outage performance of suggested Cognitive Wireless Relay Network (CWRN) which consists of a source, a destination and M cognitive relay nodes and M primary user nodes. In this study, we mainly study that the cognitive relay nodes impact on the outage performance of proposed CWRN over Rayleigh channels under both the peak and average interference power constraints. Firstly, considering a scenario with a single cognitive relay node, the optimal power control policies of the cognitive relay nodes are derived in order to achieve the minimum system outage probability under different interference power constraints. Then, to further improve outage performance, a scenario with multi-relay is also studied. Finally, the numerical simulations are presented. Numerical results show that substantial performance improves with the increase of the number of cognitive relay nodes and the power control policy under the average interference power constraint is more effective than that under the peak interference power constraint.
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  Cite this Reference:
Wenjing Yue, Zhi Chen, Anyi Wang, Luoquan Hu and Lei Wang, 2012. Outage Performance Analysis in Cognitive Wireless Relay Networks.  Research Journal of Applied Sciences, Engineering and Technology, 4(20): 3958-3964.
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ISSN (Online):  2040-7467
ISSN (Print):   2040-7459
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