信道衰落对网络编码系统性能的影响

The Effect of Channel Fading on the Performance of Network Coding System

网络编码通过使中继节点获得一定的信息处理能力,可以有效地改善网络性能。文中主要研究了用户与中继间的信道衰落对网络编码系统性能的影响。中继节点对接收到的两用户信息进行解码并根据解码情况进行编码操作,协助两用户同基站之间的通信。对中继的解码情况进行了讨论并给出了等功率分配条件下传统的协作中继网络和协作网络编码模型的中断概率。理论分析和仿真结果表明存在信道衰落时,采用网络编码可以使得系统更加稳定可靠,并提高频谱效率。

Network coding can greatly improve the network performance through coding operation at the relay.In this paper,we will study the performance improvement of network coding in cooperative relay networks under channel fading.The relay node decodes the two users＇ information and then performs network coding to help the two users to communicate with the base station.The results of decoding in the relay are discussed.The outage probabilities of traditional cooperative relay networks and cooperative network coding system are provided.Theory analysis and numerical results show that,we can get a more robust system with high spectral efficiency by using network coding.