| 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4～9 dBm、0.5～1 dBm，最大限度地节约了系统功率的消耗。 |
| 关键词: 协作通信 功率分配 中断概率 双中继协作 |
| DOI： |
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| 基金项目: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) |
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| Power allocation for two relays cooperative communication |
| WANG Li-yuan,QIN Lian,XIAO Hai-lin,LI Min-zheng |
| () |
| Abstract: |
| To overcome the difficulty of single relay cooperative communication in deep fading channels and reduce 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 relays are investigated, respectively. Under certain outage probability and power constraint, minimum powers for nodes are obtained through the Fmincon function embedded in MATLAB. Numerical results show that, in the same condition, as compared with AF and DF, the proposed two-relay HDAF strategy can save total power up to 4～9 dBm and 0.5～1 dBm respectively,and minimize the total power consumption. |
| Key words: cooperative communication power allocation outage probability two relays cooperative |
