在Nakagami-m衰落信道下,分析多播中继系统中网络编码的中断概率性能.分别采用复数域网络编码(complex fiel dnetwork coding,CFNC)和放大转发网络编码(amplify-and-forward network coding,AFNC)两种传输策略,推导了高信噪比时的中断概率近似表达式,得到两种传输策略下的系统分集增益均为2m,并通过仿真结果加以验证.仿真结果还表明,CFNC在系统中断概率、和速率和误符号率性能上均优于AFNC和无中继直接传输策略. In the Nakagami-m fading channel, we analyze the interception probability performance of network coding in multicast relay systems, and use complex fiel dnetwork coding (CFNC) and amplify-and-forward network coding AFNC), the approximate expression of the outage probability at high signal to noise ratio is deduced, and the system diversity gain under the two transmission strategies is 2m, and verified by the simulation results.The simulation results also show that the CFNC in the system Interrupt probability, and rate and error symbol rate performance are better than AFNC and relayless direct transmission strategy.