This paper considers the effects of perfect/imperfect successive interference cancellation (SIC) and perfect/imperfect ` information (CSI) in a multiple-relay two-way cooperative network using nonorthogonal multiple access (NOMA) and digital network coding (DNC). In this model, a relay is selected by maximizing estimated channel gains to enhance the decoding capacity of the nearer source and minimize the collection time of imperfect CSI. Spectrum utilization efficiency is enhanced two times by a mixture of the SIC and DNC techniques at the selected relay (called as the SIC-2TS protocol). The system performance is considered through analysis of the exact and asymptotic expressions of the system outage probabilities and throughput. The major thing is exposed as the proposed SIC-2TS protocol can reach the best performance at optimal positions of the selected relay. Besides, the system throughput of the proposed protocol outperforms a SIC-utilized two-way relaying scheme without the DNC (called as the SIC-3TS protocol) and a conventional two-way scheme (called as the CONV-4TS protocol) for all signal-to-noise ratio regions. Lastly, the validity of the analytical expressions is verified by the Monte Carlo simulation results.

中文翻译：

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现实条件下双向合作NOMA方案的取消-解码-编码处理

本文考虑了使用非正交多址（NOMA）和数字网络编码（DNC）的多中继双向合作网络中完美/不连续干扰消除（SIC）和完美/不完美信息（CSI）的影响。在此模型中，通过最大化估计的信道增益来选择中继，以增强近端信号的解码能力并最小化不完美CSI的收集时间。通过在选定的中继处将SIC和DNC技术混合使用，可以将频谱利用效率提高两倍（称为SIC-2TS协议）。通过分析系统中断概率和吞吐量的精确和渐近表达式来考虑系统性能。暴露的主要问题是，建议的SIC-2TS协议可以在所选继电器的最佳位置达到最佳性能。此外，对于所有信号，所提出协议的系统吞吐量优于不带DNC的SIC利用双向中继方案（称为SIC-3TS协议）和常规双向方案（称为CON​​V-4TS协议）。噪声比区域。最后，通过蒙特卡洛模拟结果验证了解析表达式的有效性。