In the beyond 5G networks, extraordinary demands for data rates and capacity are to be met. A possible candidate to address these challenges is Non-Orthogonal Multiple Access (NOMA) technique, which leads to higher diversity gains and massive connectivity. One caveat of NOMA is the increased receiver complexity to nullify the Inter User Interference (IUI) through Successive Interference Cancellation (SIC). In this paper, a cooperative relaying scheme is employed to improve the overall diversity gain and data rates of the NOMA system. Extrinsic Information Transfer (EXIT) charts are employed to examine the cooperative NOMA system’s user fairness as well as its performance while implementing the IRregular Convolutional Code (IRCC). The EXIT chart using IRCC evaluates the convergence analysis for the proposed system. Furthermore, the implementation of EXIT charts for optimization convergence is exploited by using power optimization and the SIC for the joint rate to evaluate the fairness of the system. Simulation results shows that cooperative NOMA helps to achieve higher diversity gain and improved data rate for the cooperative NOMA system.

中文翻译：

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超越5G网络的协作式非正交多址访问

在超越5G的网络中，必须满足对数据速率和容量的非凡要求。解决这些挑战的一种可能的选择是非正交多路访问（NOMA）技术，该技术可带来更高的分集增益和大规模的连接性。NOMA的一个警告是增加了接收机的复杂性，以通过连续干扰消除（SIC）消除用户间干扰（IUI）。在本文中，采用协作中继方案来提高NOMA系统的整体分集增益和数据速率。在实施IRregular卷积码（IRCC）时，使用外部信息传输（EXIT）图来检查合作NOMA系统的用户公平性及其性能。使用IRCC的EXIT图表评估了拟议系统的收敛性分析。此外，通过使用功率优化和SIC的联合速率来利用EXIT图表来实现优化收敛，以评估系统的公平性。仿真结果表明，协作式NOMA有助于实现协作式NOMA系统更高的分集增益和改善的数据速率。