Power allocation for non-orthogonal decode-andforward cooperation protocol  

作　　者：ZHANG Yong XU YouYun CAI YueMing 

机构地区：[1]Institute of Communications Engineering [2] PLA University of Science and Technology [3] Nanjing 210007 [4] China

出　　处：《Science in China(Series F)》2009年第6期1037-1042,共6页中国科学（F辑英文版）

基　　金：Supported by the Project of Natural Science Foundation of Jiangsu Province (Grant No BK2006701);the National Natural Science Foundation of China (Grant No 60672079);the National High-Tech Research & Development Program of China (Grant No 2007AA01Z267)

摘　　要：This paper studies the power allocation problem for the non-orthogonal decode-and-forward （NDF） cooperation protocol with selection relaying.With the availability of the magnitudes of all channel gains at the source, the power allocation is explored that maximizes the mutual information between the source and destination subject to a total power constraint.The minimum power that avoids the outage of the relay is set as a condition, under which the power allocation problem becomes one of selecting the optimal one from several allocation factor triplets.It is shown that the power allocation scheme can provide considerable performance gain, and the non-orthogonal cooperation protocol is superior to the orthogonal protocol and direct transmission.This paper studies the power allocation problem for the non-orthogonal decode-and-forward （NDF） cooperation protocol with selection relaying.With the availability of the magnitudes of all channel gains at the source, the power allocation is explored that maximizes the mutual information between the source and destination subject to a total power constraint.The minimum power that avoids the outage of the relay is set as a condition, under which the power allocation problem becomes one of selecting the optimal one from several allocation factor triplets.It is shown that the power allocation scheme can provide considerable performance gain, and the non-orthogonal cooperation protocol is superior to the orthogonal protocol and direct transmission.

关 键 词：non-orthogonal DECODE-AND-FORWARD power allocation RELAYING 

分 类 号：O224[理学—运筹学与控制论] TH121[理学—数学]