摘要
为克服信息处于深度衰落情况下单中继协作困难,减少多中继协作目的端信号处理的复杂度,给出了双中继节点参与协作通信的功率分配方案.两个中继节点分别采用放大转发(AF)、译码转发(DF)以及混合译码放大转发(HDAF)3种协作方式进行通信.在满足一定的中断概率和节点功率限制情况下,利用MATLAB软件中的Fmincon优化函数,得到了各节点的最小发射功率.数值分析表明,在相同条件下,两个中继节点采用HDAF协作方式比采用AF协作方式、DF协作方式消耗的系统总功率分别少4~9dBm、0.5~1dBm,最大限度地节约了系统功率的消耗.
To overcome the difficulty of single relay cooperative communication in deep fading channels andreduce the complexity of destination signal processing for multi-relay cooperative communication, power allocation scheme for two relays cooperative communication is proposed. Amplify-and-forward(AF) strategy,decode-and-forward(DF) strategy and hybrid decode-amplify-and-forward(HDAF) strategy for two relaysare investigated, respectively. Under certain outage probability and power constraint, minimum powers fornodes are obtained through the Fmincon function embedded in MATLAB. Numerical results show that, in thesame condition, as compared with AF and DF, the proposed two-relay HDAF strategy can save total powerup to 4 ~9 dBm and 0.5 ~1 dBm respectively,and minimize the total power consumption.
出处
《电讯技术》
北大核心
2014年第2期145-150,共6页
Telecommunication Engineering
基金
国家重点基础研究发展计划(973计划)项目(2008CB317109)
国家自然科学基金资助项目(61261018
61362007)
广西自然科学基金重点项目(2011GXNSFD018028)
广西科学基金资助项目(桂科自0991241)
广西无线宽带通信与信号处理重点实验室2012年度主任基金项目(12111)~~
关键词
协作通信
功率分配
中断概率
双中继协作
cooperative communication
power allocation
outage probability
two relays cooperative