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Journal of Zhejiang University SCIENCE C 2011 Vol.12 No.4 P.280-287

http://doi.org/10.1631/jzus.C1000179


Power control for two-way amplify-and-forward relaying over Rayleigh fading channels


Author(s):  Xing-zheng Li, Yuan-an Liu, Gang Xie, Pan-liang Deng, Fang Liu

Affiliation(s):  School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China

Corresponding email(s):   lixingzheng1987@163.com

Key Words:  Amplify-and-forward (AF) relaying, Power control, Two-way relay channel, Bidirectional relaying, Cooperative communication


Xing-zheng Li, Yuan-an Liu, Gang Xie, Pan-liang Deng, Fang Liu. Power control for two-way amplify-and-forward relaying over Rayleigh fading channels[J]. Journal of Zhejiang University Science C, 2011, 12(4): 280-287.

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author="Xing-zheng Li, Yuan-an Liu, Gang Xie, Pan-liang Deng, Fang Liu",
journal="Journal of Zhejiang University Science C",
volume="12",
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pages="280-287",
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publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.C1000179"
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%A Xing-zheng Li
%A Yuan-an Liu
%A Gang Xie
%A Pan-liang Deng
%A Fang Liu
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.C1000179

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T1 - Power control for two-way amplify-and-forward relaying over Rayleigh fading channels
A1 - Xing-zheng Li
A1 - Yuan-an Liu
A1 - Gang Xie
A1 - Pan-liang Deng
A1 - Fang Liu
J0 - Journal of Zhejiang University Science C
VL - 12
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SP - 280
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.C1000179


Abstract: 
We propose two novel power control policies for a two-way amplify-and-forward (AF) relaying system, in which each node (two sources and one relay) is assumed to operate under both minimum and peak power constraints. Through the exploitation of instantaneous channel gains, the first policy can maximize the sum rate of the system. However, the instantaneous channel gains may be unavailable in a rapid time-varying system, where the first policy is inoperable. Consequently, a robust power control policy which requires only mean channel gains is proposed to maximize the upper bound of the average sum rate, and the properties of this policy are investigated. Simulation results show that, by comparison with the policy in which all the nodes use their peak transmit power, the proposed power control policies can provide considerable system performance improvement. Furthermore, the performance difference between the two proposed policies is negligible when the relay is close to one source.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

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