一种改进的自适应全双工中继系统中继策略  

Improved Adaptive Relaying Strategy for Full Duplex Relay System

作　　者：龙志鹏 余江[1] 常俊[1] 

机构地区：[1]云南大学信息学院,昆明650091

出　　处：《计算机科学》2017年第9期110-114,共5页Computer Science

基　　金：国家自然科学基金(61162004)资助

摘　　要：提出了一种基于源节点到中继节点(SR)信噪比门限和中继节点最小自干扰的全双工中继策略,并在此基础上与SR最大信噪比的全双工中继策略相结合,构建了一种改进的自适应全双工中继系统。在对等功率分配条件下使用DF协议转发时对自适应全双工中继系统的中断概率进行了分析,结果表明与自适应半双工中继策略相比,提出的自适应全双工中继系统的中断概率更低。与基于SR最大信噪比的全双工中继策略相比,一般情况下,当SR信噪比系数较大时,自干扰信号也较强,此时所提自适应全双工中继系统采用基于SR门限和最小自干扰的中继策略,中断概率较低;而在自干扰信号较小的情况下,该自适应全双工中继系统将采用基于最大SR信噪比的全双工中继系统的中继策略,能维持较好的中断性能。This paper proposed a full duplex relay strategy based on threshold of the signal to noise ratio from source node to relay nodes （SR） and the minimum self-interference of relay nodes, and constructed an improved adaptive full duplex relay system through combining with the full duplex relaying strategy based on the maximum of signal to noise ratio from source node to relay nodes. Under the condition of equal power allocation and using DF protocol forwarding, the outage probability of the proposed full duplex relay system was analyzed. The results show that the outage probabil ity of the proposed full duplex relay strategy is lower than that of an adaptive half duplex relay strategy. It is also lower than that of a full duplex relay strategy based on the maximum of signal to noise ratio from source node to relay nodes when the self-interference signal is strong and the signal to noise ratio of SR is large. The proposed adaptive full duplex relay system will use relay strategy of the full duplex relay system based on the maximum of signal to noise ratio from source node to relay nodes to maintain good outage performance when the self-interference signal is weak.

关 键 词：全双工中继 半双工中继 中断概率 最小自干扰 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]