论文标题
可重新配置的智能表面授权通过用户继电器分解合作率
Reconfigurable Intelligent Surfaces Empowered Cooperative Rate Splitting with User Relaying
论文作者
论文摘要
合作率拆分（CRS）建立在汇率分解多个访问（RSMA）和机会性用户中继的基础上，已被认为是一种有前途的传输策略，以提高Multiantenna广播频道的用户公平性和光谱效率。为了进一步提高其性能，在这项工作中研究了CRS和可重构智能表面（RIS）的相互作用。具体而言，提出了一种新型的RIS AD辅助CRS传输框架，并研究了相应的资源分配问题，以最大程度地研究用户之间的最低利率。然后，提出了一种替代优化算法，以优化迭代的发射光束形成，共同速率分配和RIS相。数值结果表明，与无RIS相比，提出的RIS ADEAD CRS传输框架可显着提高光谱效率和其他方案。
Cooperative rate splitting (CRS), built upon rate splitting multiple access (RSMA) and opportunistic user relaying, has been recognized as a promising transmission strategy to enhance the user fairness and spectral efficiency in multiantenna broadcast channels. To further boost its performance, the interplay of CRS and reconfigurable intelligent surface (RIS) is investigated in this work. Specifically, a novel RIS-aided CRS transmission framework is proposed and the corresponding resource allocation problem to maximize the minimum rate among users is investigated. An alternative optimization algorithm is then proposed to optimize the transmit beamforming, common rate allocation, and RIS phases, iteratively. Numerical results show that the proposed RIS-aided CRS transmission framework significantly improves the spectral efficiency compared with its non-cooperative counterpart and other schemes without RIS.
