同信道干扰下的中继网络性能分析

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。

Performance analysis of relay networks in the presence of co-channel interference

Outage probability of two-hop relay networks in the presence of co-channel interference is investigated. 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 signal, 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 situations. 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.