Please wait a minute...
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
Download:   PDF(171KB)
Export: BibTeX | EndNote (RIS)      

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 wordsAmplify-and-forward (AF) relaying      Power control      Two-way relay channel      Bidirectional relaying      Cooperative communication     
Received: 02 June 2010      Published: 11 April 2011
CLC:  TP393  
Cite this article:

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.

URL:

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


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

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 
[1] Yun-zheng TAO, Chun-yan WU, Yu-zhen HUANG, Ping ZHANG. A projected gradient based game theoretic approach for multi-user power control in cognitive radio network[J]. Front. Inform. Technol. Electron. Eng., 2018, 19(3): 367-378.
[2] Lu CHEN, Ding-zhu WEN, Cai-jun ZHONG, Guan-ding YU. Hybrid full-/half-duplex cellular networks: user admission and power control[J]. Front. Inform. Technol. Electron. Eng., 2018, 19(3): 379-387.
[3] Heng Nian, Yi-peng Song. Multiple target implementation for a doubly fed induction generator based on direct power control under unbalanced and distorted grid voltage[J]. Front. Inform. Technol. Electron. Eng., 2015, 16(4): 321-334.
[4] Gui-jie Wang, Yun-long Cai, Min-jian Zhao, Jie Zhong. Joint adaptive power allocation and interference suppression algorithms based on the MSER criterion for wireless sensor networks[J]. Front. Inform. Technol. Electron. Eng., 2014, 15(10): 917-928.
[5] Guang-xi ZHU, Xue-bing PEI, Dai-ming QU, Jian LIU, Qing-ping WANG, Gang SU. Joint bandwidth allocation and power control with interference constraints in multi-hop cognitive radio networks[J]. Front. Inform. Technol. Electron. Eng., 2010, 11(2): 139-150.
[6] Peng Zhou, Wei Zhang, Yi-kang He, Rong Zeng. Improved direct power control of a grid-connected voltage source converter during network unbalance[J]. Front. Inform. Technol. Electron. Eng., 2010, 11(10): 817-823.