DocumentCode :
1447316
Title :
Performance of Cooperative Spectrum-Sharing Systems with Amplify-and-Forward Relaying
Author :
Asghari, Vahid ; Aissa, Sonia
Author_Institution :
Inst. Nat. de la Rech. Sci. (INRS), Univ. of Quebec, Montreal, QC, Canada
Volume :
11
Issue :
4
fYear :
2012
fDate :
4/1/2012 12:00:00 AM
Firstpage :
1295
Lastpage :
1300
Abstract :
This paper investigates the performance of using cooperative relaying technique in spectrum-sharing cognitive radio (CR) systems while considering constraints on the average received-interference at the primary receivers. Specifically, we consider that the communication between a secondary source and its destination nodes is assisted by an intermediate relay that uses amplify-and-forward (AF) strategy. In this context, we obtain closed-form expressions for the probability density function (PDF) of the received signal-to-noise ratio (SNR) at the secondary destination node for different channel fading distributions, namely, Nakagami and Rayleigh. Then, the end-to-end performance of the proposed cooperative relaying spectrum-sharing system is investigated in terms of the overall achievable capacity and outage probability of the secondary user communication. Finally, simulation results sustaining our theoretical analysis are provided and comparisons illustrating the overall performance of the cooperative spectrum-sharing system are drawn for different propagation conditions.
Keywords :
Nakagami channels; Rayleigh channels; amplify and forward communication; channel capacity; cognitive radio; cooperative communication; diversity reception; probability; radio receivers; radio spectrum management; Nakagami channel; Rayleigh channel; amplify and forward strategy; channel capacity; cognitive radio; cooperative relaying technique; cooperative spectrum sharing system; fading channel distribution; interference suppression; outage probability; probability density function; receiver; signal to noise ratio; Interference; Nakagami distribution; Rayleigh channels; Relays; Signal to noise ratio; Wireless communication; Cognitive radio; amplify-and-forward relaying; cooperative relaying; spectrum sharing;
fLanguage :
English
Journal_Title :
Wireless Communications, IEEE Transactions on
Publisher :
ieee
ISSN :
1536-1276
Type :
jour
DOI :
10.1109/TWC.2012.020812.111201
Filename :
6151779
Link To Document :
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