In this letter, we investigate the amalgamation between the reconfigurable intelligent surface (RIS) technology and the joint transmission coordinated multipoint (JT-CoMP) in order to enhance the performance of a cell-edge user equipment (UE) in a two-user non-orthogonal multiple access (NOMA) group without deteriorating the performance of the NOMA cell-center UE. The RIS is adopted to construct a strong combined channel gain at the cell-edge UE, while JT-CoMP is used to mitigate the effects of inter-cell interference (ICI). In this proposed framework, we derive first a closed-form expression for the ergodic rate of the cell-edge UE, and then we evaluate the network spectral efficiency. We validate the derived expression through Monte-Carlo simulations, where we demonstrate the efficacy of the proposed framework compared to other multiple access techniques proposed in the literature.

中文翻译：

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下行NOMA网络中的可重构智能表面辅助协调多点

在这封信中，我们研究了可重构智能表面（RIS）技术与联合传输协调多点（JT-CoMP）之间的融合，以增强两用户非移动用户之间的小区边缘用户设备（UE）的性能。 -正交多路访问（NOMA）组，而不会降低NOMA小区中心UE的性能。RIS被用来在小区边缘UE处构建强大的组合信道增益，而JT-CoMP被用来减轻小区间干扰（ICI）的影响。在这个提出的框架中，我们首先推导了小区边缘UE遍历率的闭式表达式，然后评估了网络频谱效率。我们通过蒙特卡洛模拟验证派生的表达式，