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无线网络编码是一项能极大提高无线网络流量的有用技术,而协作分集可以有效地克服无线衰落的影响。研究了Nakagami-m信道下协作网络编码系统中断性能,分析了不同协作策略下的互信息表达式,推导了协作网络编码中断概率闭式表达式,并对分析的结果进行了仿真。仿真结果显示,在高SNR和谱效率R<4条件下,协作网络编码中断概率较分布式空时编码性能SNR增益有接近2 dB的提高,并且随分布参数m值的增大,协作网络编码中断概率性能逐步改善。
Wireless network coding is a useful technology that can greatly improve the wireless network traffic, and cooperative diversity can effectively overcome the impact of wireless fading. The performance of the cooperative network coding system under Nakagami-m channel is studied. The mutual information expressions under different cooperation strategies are analyzed. The closed-form expressions of the code breaking probability of the cooperative network are deduced. The results of the simulation are also simulated. The simulation results show that the cooperative network coding discontinuity probability increases nearly 2 dB compared with the distributed space-time coding performance SNR gain under high SNR and spectral efficiency R <4, and with the increase of distribution parameter m, cooperative network coding Interrupt probability performance gradually improved.