Multiple access technology is a key technology in various generations of wireless communication systems. As a potential multiple access technology for the next generation wireless communication systems, model division multiple access (MDMA) technology improves spectrum efficiency and feasibility regions. This implies that the MDMA scheme can achieve greater performance gains compared to traditional schemes. Relayassisted cooperative networks, as a infrastructure of wireless communication, can effectively utilize resources and improve performance when MDMA is applied. In this paper, a communication relay cooperative network based on MDMA in dissimilar rayleigh fading channels is proposed, which consists of two source nodes, any number of decode-and-forward (DF) relay nodes, and one destination node, as well as using the maximal ratio combining (MRC) at the destination to combine the signals received from the source and relays. By applying the state transition matrix (STM) and moment generating function (MGF), closed-form analytical solutions for outage probability and resource utilization efficiency are derived. Theoretical and simulation results are conducted to verify the validity of the theoretical analysis.

翻译：多址接入技术是各代无线通信系统中的关键技术。作为下一代无线通信系统的潜在多址接入技术，模型分多址接入（MDMA）技术提升了频谱效率与可行性区域，这意味着与传统方案相比，MDMA方案能够实现更大的性能增益。中继辅助协作网络作为无线通信的基础设施，在应用MDMA时能够有效利用资源并提升性能。本文提出一种基于MDMA的异构瑞利衰落信道通信中继协作网络，该网络包含两个源节点、任意数量的译码转发中继节点及一个目的节点，并在目的节点采用最大比合并（MRC）技术对来自源节点和中继节点的信号进行合并。通过应用状态转移矩阵（STM）和矩生成函数（MGF），推导出中断概率与资源利用效率的闭式解析解。理论分析与仿真结果共同验证了理论分析的有效性。