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Front. Inform. Technol. Electron. Eng.  2011, Vol. 12 Issue (4): 280-287    DOI: 10.1631/jzus.C1000179
    
Power control for two-way amplify-and-forward relaying over Rayleigh fading channels
Xing-zheng Li*, Yuan-an Liu, Gang Xie, Pan-liang Deng, Fang Liu
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
Power control for two-way amplify-and-forward relaying over Rayleigh fading channels
Xing-zheng Li*, Yuan-an Liu, Gang Xie, Pan-liang Deng, Fang Liu
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
 全文: PDF(171 KB)  
摘要： 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.
关键词： Amplify-and-forward (AF) relaying;  Power control;  Two-way relay channel;  Bidirectional relaying;  Cooperative communication    
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.
Key words: Amplify-and-forward (AF) relaying    Power control    Two-way relay channel    Bidirectional relaying    Cooperative communication
收稿日期: 2010-06-02 出版日期: 2011-04-11
CLC:  TP393  
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Xing-zheng Li
Yuan-an Liu
Gang Xie
Pan-liang Deng
Fang Liu

引用本文:

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. Front. Inform. Technol. Electron. Eng., 2011, 12(4): 280-287.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1000179    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2011/V12/I4/280

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