In recent years, non-orthogonal multiple access (NOMA) has attracted considerable attention as a promising multi-access technique for next generation wireless communication systems. Media-based modulation (MBM), which is an emerging index modulation concept, is another technique that can be considered for next generation wireless communication systems due to its high spectral and energy efficiency. In this paper, we propose a NOMA-based decode-and-forward relaying system, where MBM is applied at the source to improve error performance at the relay. We consider a topology consisting of a single source with a single transmit antenna equipped with multiple radio frequency (RF) mirrors, one relay equipped with a single transmit and multiple receive antennas, and multiple users equipped with multiple receive antennas. Pairwise error probability expression for NOMA with multiple receive antennas is derived and the union bound on bit error rate (BER) for the overall system with imperfect successive interference cancellation (SIC) is obtained in closed-form. Analytical results are in agreement with the Monte Carlo simulation results. Moreover, two power allocation optimization problems are formulated in terms of user fairness and quality of service requirements of the users. BER performance of the proposed system is also investigated using the optimum coefficients according to the formulated problems. It is shown that the proposed system outperforms the conventional cooperative NOMA system in terms of error performance as the data rate increases.

近年来，作为下一代无线通信系统的有前途的多址接入技术，非正交多址接入（NOMA）引起了相当大的关注。基于媒体的调制（MBM）是一种新兴的索引调制概念，由于其较高的频谱和能效，是下一代无线通信系统可以考虑的另一种技术。在本文中，我们提出了一种基于NOMA的解码转发中继系统，其中MBM应用于源，以提高中继的错误性能。我们考虑一种拓扑结构，该拓扑结构包括一个源，一个配备有多个射频（RF）镜的发送天线，一个配备有单个发送和多个接收天线的中继以及多个配备有多个接收天线的用户。推导了具有多个接收天线的NOMA的成对误差概率表达式，并以封闭形式获得了具有不完善的连续干扰消除（SIC）的整个系统的误码率联合限度（BER）。分析结果与蒙特卡洛模拟结果一致。此外，根据用户公平性和用户的服务质量要求，提出了两个功率分配优化问题。根据提出的问题，还使用最佳系数研究了所提出系统的BER性能。结果表明，所提出的系统在数据传输速率提高时，在错误性能方面优于传统的协作式NOMA系统。