On the Performance of Cognitive Relay Networks Under Primary User's Outage Constraint

In this letter, we propose two relay selection schemes in cognitive relay networks. According to the proposed schemes, the number of relays involved in the opportunistic relaying is determined by the partial channel state information (CSI) of primary user link and partial CSI between the relays and...

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Bibliographic Details
Published in:IEEE communications letters 2011-04, Vol.15 (4), p.422-424
Main Authors: Si, JiangBo, Li, Zan, Chen, XiaoJun, Hao, BenJian, Liu, ZengJi
Format: Article
Language:English
Subjects:
Applied sciences
Cognitive radio
CSI
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Fading
Information, signal and communications theory
Interference
opportunistic relaying
Radio transmitters
Radiocommunication specific techniques
Radiocommunications
Rayleigh fading
Receivers
Relays
Signal and communications theory
Signal to noise ratio
Signal, noise
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:In this letter, we propose two relay selection schemes in cognitive relay networks. According to the proposed schemes, the number of relays involved in the opportunistic relaying is determined by the partial channel state information (CSI) of primary user link and partial CSI between the relays and the primary user receiver, so as to maintain the primary user's outage probability below a predetermined value. The exact outage probabilities of the secondary user are derived over Rayleigh fading channels. Finally, simulation results validate our analysis.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2011.030311.110013