机会协同通信系统的中继公平性研究  

Relay Fairness in Opportunistic Cooperative Communication Systems

作　　者：张媛[1] 郭爱煌[1,2] 

机构地区：[1]同济大学电子与信息工程学院,上海201804 [2]毫米波国家重点实验室,江苏南京210096

出　　处：《通信技术》2011年第10期13-15,共3页Communications Technology

摘　　要：为提高机会协同通信系统的中继选择公平性,提出了以不影响系统中断性能为目标的协同方案。在建立了协同通信系统模型的基础上,提出机会协同方案,并引入比例公平算法对机会协同方案进行改进;分别对2种方案下的中继选择概率与系统中断概率进行了分析,根据定义的公平因子表征中继公平性与理想公平上限。仿真结果表明,提出的基于比例公平的机会协同方案,显著改善了中继选择的公平性,在大信噪比条件下趋近理想公平上限,同时保持了系统中断性能。To improve the performance of relay fairness in opportunistic cooperative communication systems,a cooperation scheme is suggested,aiming at no outage performance deterioration.Based on the constructed system model,a new opportunistic cooperation scheme is proposed,and by introducing proportional fair algorithm,this scheme is improved.The relay selection probability and outage probability of these two schemes are analyzed.In the light of defined fairness factor,the relay fairness and the upper limit of ideal fairness are represented.Numerical Simulation indicates that the proposed opportunistic cooperation scheme could greatly improve the relay fairness,and under large signal-to-noise ratio condition,this relay fairness approximates to the upper limit of ideal fairness without any loss of outage performance.

关 键 词：协同通信 中继选择 比例公平 译码前传 中断概率 

分 类 号：TN925[电子电信—通信与信息系统]