Optimal power allocation for amplify-and-forward in single relay non-cooperative systems  

作　　者：王仕果 Ji Hong 

机构地区：[1]Key Lab of Universal Wireless Communications, Ministry of Education, Beijing University of Posts and Telecommunications, Beijing 100876, P.R. China

出　　处：《High Technology Letters》2010年第4期428-432,共5页高技术通讯（英文版）

基　　金：Supported by the National High Technology Research and Development Progranmme of China (No. 2009AA01Z246,2009AA01Z211 )

摘　　要：For a single-relay amplify-and-forward (AF) non-cooperative system,an optimal power proportionbetween source and relay is considered.Aiming to minimize end-to-end bit error rate (BER) and maximizeattainable rate,both large-scale path loss and small-scale Rayleigh fading are taken into account.Aclosed form expression to allocate power in optimal proportion at source is obtained.Simulation resultsshow that the proposed scheme to distribute power can minimize BER under any channel conditions.For a single-relay amplify-and-forward （AF） non-cooperative system, an optimal power proportion between source and relay is considered. Aiming to minimize end-to-end bit error rate （BER） and maximize attainable rate, both large-scale path loss and small-scale Rayleigh fading are taken into account. A closed form expression to allocate power in optimal proportion at source is obtained. Simulation results show that the proposed scheme to distribute power can minimize BER under any channel conditions.

关 键 词：amplify-and-forward （AF） optimal power allocation cooperative communication wireless relay 

分 类 号：TN92[电子电信—通信与信息系统]