Spectral Efficiency Optimization for Hybrid Relay-Reflecting Intelligent Surface
Spectral Efficiency Optimization for Hybrid Relay-Reflecting Intelligent Surface
复制标题
混合中继反射智能表面的光谱效率优化
DOI：
10.1109/iccworkshops50388.2021.9473487
复制
发表时间：
2021
期刊：
影响因子：
--
通讯作者：
M. Juntti
中科院分区：
文献类型：
--
作者：
N. Nguyen;Quang;Kyungchun Lee;M. Juntti
我们提出了一种混合中继反射智能表面（HR-RIS）的新概念，其中单个或几个元件部署有功率放大器（PA）作为有源继电器，而其余元件仅反射入射信号。 HR-RIS 的设计和优化被表述为频谱效率（SE）最大化问题，该问题可通过交替优化（AO）方法有效地解决。仿真结果表明，相对于传统的可重构智能表面（RIS），即使功率预算有限，所提出的 HR-RIS 也可以实现 SE 的显着改进。特别是，HR-RIS 的有利设计和部署是通过分析得出的并在数值上证明是合理的。
We propose a novel concept of hybrid relay-reflecting intelligent surface (HR-RIS), in which a single or few elements are deployed with power amplifiers (PAs) to serve as active relays, while the remaining elements only reflect the incident signals. The design and optimization of the HR-RIS is formulated in a spectral efficiency (SE) maximization problem, which is efficiently solved by the alternating optimization (AO) method. The simulation results show that a significant improvement in the SE can be attained by the proposed HR-RIS, even with a limited power budget, with respect to the conventional reconfigurable intelligent surface (RIS). In particular, the favorable design and deployment of the HR-RIS are analytically derived and numerically justified.