论文标题
可重新配置的智能表面（RIS）辅助多用户网络：Noma和RIS之间的相互作用
Reconfigurable Intelligent Surface (RIS) Aided Multi-User Networks: Interplay Between NOMA and RIS
论文作者
论文摘要
本文着重于采用正交多访问（OMA）或非正交多重访问（NOMA）的多用户网络中可重构智能表面（RISS）的开发，重点是研究Noma和RIS之间的相互作用。根据RIS反射系数是否只能在一次传输过程中进行一次或多次调整，我们区分静态和动态RIS配置。特别是，从信息理论的角度来看，RIS的容量区域是表征的，并将其与OMA速率区域进行了比较，这表明动态RIS配置是能力实现的。然后，研究了RIS部署位置对不同多个访问方案的性能的影响，这揭示了Noma和OMA分别优选的不对称和对称部署策略。此外，对于RIS辅助多 - Antenna Noma网络，基于基于波束形式的策略和群集策略提出了三种新型的关节活动和被动光束器设计。最后，突出显示了针对RIS-Noma网络的开放研究问题。
This article focuses on the exploitation of reconfigurable intelligent surfaces (RISs) in multi-user networks employing orthogonal multiple access (OMA) or non-orthogonal multiple access (NOMA), with an emphasis on investigating the interplay between NOMA and RIS. Depending on whether the RIS reflection coefficients can be adjusted only once or multiple times during one transmission, we distinguish between static and dynamic RIS configurations. In particular, the capacity region of RIS aided single-antenna NOMA networks is characterized and compared with the OMA rate region from an information-theoretic perspective, revealing that the dynamic RIS configuration is capacity-achieving. Then, the impact of the RIS deployment location on the performance of different multiple access schemes is investigated, which reveals that asymmetric and symmetric deployment strategies are preferable for NOMA and OMA, respectively. Furthermore, for RIS aided multiple-antenna NOMA networks, three novel joint active and passive beamformer designs are proposed based on both beamformer based and cluster based strategies. Finally, open research problems for RIS-NOMA networks are highlighted.
