以集群为基础的策略,最大限度地提高分布式重配置智能表面 (RIS) 辅助协调多点非正交多通道 (CoMP-NOMA) 系统的总和率
Qingqing Yang1, Qiuhua Zhang1, Yi Peng1
1Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, China.
Sensors (Basel, Switzerland)
|June 19, 2024
概括
本研究介绍了一种可重新配置的智能表面辅助协调多点非直角多重访问 (RIS-CoMP-NOMA) 模型. 它提高了边缘用户的通信质量和公平性,同时降低了蜂网络的系统功耗.
科学领域:
- 无线通信网络是无线通信网络.
- 信号处理 信号处理
- 优化技术的优化技术
背景情况:
- 多细胞网络的边缘用户面临的通信质量差,公平性低,以及高功耗.
- 协调多点非正角多重访问 (CoMP-NOMA) 和可重新配置的智能表面 (RIS) 提供了潜在的解决方案,但需要集成优化.
研究的目的:
- 提出一个由RISs辅助的分布式智能CoMP-NOMA协作传输模型.
- 解决边缘用户的通信质量,公平性和功耗问题.
- 为了优化功率分配,用户聚类和RIS相位移矩阵设计.
主要方法:
- 开发了一个RIS增强的边缘用户分组和NOMA用户集群协调机制.
- 制定了功率分配 (PA),用户聚类 (UC) 和RIS相位移矩阵设计 (PS) 的联合优化,作为混合整数非线性编程 (MINLP) 问题.
- 分解了MINLP问题,并使用交替优化方法解决了它.
主要成果:
- 拟议的RIS辅助的JT-CoMP NOMA方案有效地降低了系统功耗.
- 观察到系统吞吐量和用户率的显著改善.
- 该模型成功地将RIS信号增强与NOMA用户调度和协作传输集成在一起.
结论:
- 开发的RIS-CoMP-NOMA模型为在多细胞网络中增强边缘用户通信提供了可行的解决方案.
- 交替优化方法有效地解决了复杂的联合优化问题.
- 这些发现表明RIS在提高NOMA系统性能方面的潜力.
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