基于网络编码的系统中断性能分析

在无线通信中，信道的衰落会降低信号传输的可靠性，影响通信质量。协同分集技术作为一种对抗衰落的有效手段，能提高无线通信性能，已经得到了广泛的研究和应用。为了更有效地利用信道资源，本文提出了基于机会式网络编码的协同机制。在两个节点A和B与一个中继节点R相互协同向基站D发送数据的仿真场景下，研究非协同通信机制、传统协同通信机制和机会式网络编码的协同通信机制下的系统中断概率。理论分析和系统仿真表明，当节点A与B之间的链路以及节点A，B到中继R的链路存在衰落的情况下，机会式网络编码的协同策略具有较好的性能。 

Performance Analysis of System Outage Based on Network coding

In wireless communication, fading over wireless channels decreases the reliability of the transmission and impact the quality of communication. Cooperative diversity offers an effective countermeasure against fading due to multi-path propagation in wireless medium, so far cooperative diversity has been widely studied and applied. For best use of wireless channels, the paper proposes user cooperation based on opportunistic network coding. The scenario under consideration is one in which three “partners” Node A, Node B and Relay node R-cooperate in transmitting information to base station D. the outage probability performance of non-cooperative communication scheme, traditional user cooperative scheme and opportunistic network coded user cooperative scheme are analyzed. Theoretical analysis and experimental simulation show that in existing fading phenomenon, cooperative scheme with network coding is better than traditional user cooperative and non-cooperative scheme.