可重构的智能反射面实现了超越 5G 网络的频谱接入

Raymond Sabogu-Sumah, K. A. Opare, J. Gadze, Edmund Y. Fianko, Timothy Ashong
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摘要

本文研究了利用可重构智能表面(RIS)实现主频谱用户和辅助频谱用户共存的问题。虽然 RIS 技术被广泛用于提高用户吞吐量或扩大小区边缘设备的覆盖范围,但本研究偏离了传统的使用场景。我们对 Beyond 5G (BSG) 蜂窝网络用户的传播信道进行建模,同时考虑到 RIS 所提供的直接路径和反射路径。仿真结果表明,RIS 的使用提高了用户容量,同时反射了来自主用户方向的信号,使 B5G 系统能够使用主用户的频谱,而不会对其造成有害干扰。此外,研究还表明,室内蜂窝部署可确保最大和/或完全保护主频谱用户,而室外部署则需要额外的保护机制,如更长的分离距离和功率控制方案。
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Reconfigurable Intelligent Reflecting Surfaces Enabled Spectrum Access for Beyond 5G Networks
This paper studies the use of Reconfigurable Intelligent Surfaces (RIS) to enable coexistence between Primary and Secondary Spectrum Users. While RIS tech-nology is widely used to improve user throughput or extend coverage to cell edge devices, this study deviates from the conventional use scenario. We model the propagation channel of the users of a Beyond 5G (BSG) cellular networks taking note of the direct path and reflected paths facilitated by the RIS. Simulation results show that the use of the RIS improves the user capacity while reflecting the signals from the direction of the primary users which enables the B5G system to use the primary user's spectrum without harm-fully interfering with it. Further, it is shown that indoor cellular deployment ensures maximum and/or complete protection of the primary spectrum user whereas outdoor deployment requires extra protection mechanisms such as longer separation distances, power control schemes.
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