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

doi:10.1631/jzus.C1000179

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

计算机与自动化 | Updated：2022-08-31

- Power control for two-way amplify-and-forward relaying over Rayleigh fading channels
- Power control for two-way amplify-and-forward relaying over Rayleigh fading channels
- 信息与电子工程前沿（英文） 2011年12卷第4期页码：280-287
- Affiliations：
  
  School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
- Author bio：
  
  E-mail:lixingzheng1987@163.com
- Funds：
- DOI：10.1631/jzus.C1000179
  中图分类号：
- 收稿：2010-06-02，
  
  修回：2011-03-01，
  
  录用：2010-10-25，
  
  纸质出版：2011-04
- Accepted：
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Power control for two-way amplify-and-forward relaying over Rayleigh fading channels[J]. 信息与电子工程前沿（英文）, 2011,12(4):280-287.

Xing-zheng LI, Yuan-an LIU, Gang XIE, et al. Power control for two-way amplify-and-forward relaying over Rayleigh fading channels[J]. Frontiers of Information Technology & Electronic Engineering, 2011, 12(4): 280-287.
Power control for two-way amplify-and-forward relaying over Rayleigh fading channels[J]. 信息与电子工程前沿（英文）, 2011,12(4):280-287. DOI： 10.1631/jzus.C1000179.

Xing-zheng LI, Yuan-an LIU, Gang XIE, et al. Power control for two-way amplify-and-forward relaying over Rayleigh fading channels[J]. Frontiers of Information Technology & Electronic Engineering, 2011, 12(4): 280-287. DOI： 10.1631/jzus.C1000179.

摘要

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.

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