同信道干扰下的中继网络性能分析  

Performance Analysis of Relay Networks in the Presence of Co-channel Interference

作　　者：管张均 周希朗[2] 

机构地区：[1]上海无线电设备研究所,上海200090 [2]上海交通大学电子工程系,上海200240

出　　处：《电讯技术》2013年第12期1605-1609,共5页Telecommunication Engineering

摘　　要：分析了两跳中继网络在同信道干扰下的中断概率。在中继网络中,源节点广播信号至所有的中继节点,此时同信道干扰在中继节点或者目的节点处被引入。中继节点采用解码转发策略转发源节点的信号,而目的节点采用最大比合并技术接收来自中继节点的信号。最终推导了各种干扰情形下系统中断概率的闭合表达式。仿真结果表明,解析曲线和蒙特卡洛仿真曲线非常吻合,而同信道干扰在某些场合会对系统性能造成较大影响。分析结果对中继网络的系统设计和参数设置都有一定的参考意义。Outage probability of two-hop relay networks in the presence of co-channel interference is in-vestigated. The source broadcasts signals to all the relays, and co-channel interference is introduced either at the relays or at the destination. Relays adopt decode-and-forward（ DF） scheme to retransmit the sig-nal, and the destination employs Maximum Ratio Combining（ MRC） technique to combine the signals from the relays. Closed-form expressions of outage probability are derived under different interference situa-tions. Simulation results show that the analytical curves agree with the simulated ones very well, and the co-channel interference may have great effect on the system performance in some situation. The results will be helpful to the system design and parameter configuration of relay networks.

关 键 词：中继网络 解码转发 放大转发 同信道干扰 中断概率 

分 类 号：TN925[电子电信—通信与信息系统]