基于RIS的室内无线通信信号增强系统

doi:10.11959/j.issn.1000-436x.2022228

通信学报 ›› 2022, Vol. 43 ›› Issue (12): 24-31.doi: 10.11959/j.issn.1000-436x.2022228

• 专题：信息超材料在移动通信中的应用 • 上一篇下一篇

基于RIS的室内无线通信信号增强系统

唐奎, 胡琪, 赵俊明, 陈克, 冯一军

南京大学电子科学与工程学院，江苏南京 210023

修回日期:2022-11-28 出版日期:2022-12-25 发布日期:2022-12-01
作者简介:唐奎（1998- ），男，四川德阳人，南京大学博士生，主要研究方向为可重构智能表面及其在无线通信中的应用等
胡琪（1996- ），女，浙江温州人，南京大学博士生，主要研究方向为时空编码可重构超表面在电磁波调控及无线通信中的应用
赵俊明（1981- ），男，江苏常州人，博士，南京大学教授、博士生导师，主要研究方向为基于人工电磁材料的电磁吸波材料、可调控智能隐身材料、光学变换与场变换设计等
陈克（1990- ），男，江苏镇江人，博士，南京大学副教授、博士生导师，主要研究方向为人工电磁材料及其在无线通信和新型电磁器件中的应用
冯一军（1964- ），男，江苏南京人，博士，南京大学教授、博士生导师，主要研究方向为人工电磁材料及光电子器件应用、电磁波新材料、微波器件和技术
基金资助:
国家自然科学基金资助项目(62271243);国家自然科学基金资助项目(62071215);国家自然科学基金资助项目(91963128);国家重点研发计划基金资助项目(2017YFA0700201)

RIS-based indoor wireless communication signal enhancement system

Kui TANG, Qi HU, Junming ZHAO, Ke CHEN, Yijun FENG

School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China

Revised:2022-11-28 Online:2022-12-25 Published:2022-12-01
Supported by:
The National Natural Science Foundation of China(62271243);The National Natural Science Foundation of China(62071215);The National Natural Science Foundation of China(91963128);The National Key Research and Development Program of China(2017YFA0700201)

摘要/Abstract

摘要：

利用可重构智能表面（RIS）对电磁波反射特性的动态调控能力，构建了室内无线通信信号增强系统，可以实现室内信号弱覆盖盲区的接收端信号增强。首先，设计了具有动态可调相位特性的RIS单元，通过2个开关二极管的通断组合实现了2 bit反射相位的动态变化。然后，实验验证了RIS对出射电磁波束方向的动态调控。最后，通过上位机和现场可编程门阵列（FPGA）实现了RIS编码的智能调控，并利用RIS口径上的反射相位分布实现了出射波束的动态改变，同时结合遍历预编码的优化方法，实验证明了室内接收信号功率的增强效果。仿真分析及实验结果均表明，所设计的RIS系统能够有效动态提升室内无线信号覆盖质量，其接收信号功率平均提升8.9 dB，最大可达22 dB，有望为5G及新一代通信网络优化提供基础硬件技术支撑。

关键词: 可重构智能表面, 无线通信, 室内信号增强, 微波

Abstract:

By utilizing the tunable performances of the reconfigurable intelligent surface (RIS) to manipulate the reflected electromagnetic waves, an indoor wireless communication signal enhancement system was constructed, which could improve the signal quality of the receiving terminal in where the initial wireless signals were weak.First, a RIS unit cell with dynamically tunable phase characteristics was designed, and the dynamic change of the 2 bit reflection phases was realized by switching the working states of the two active diodes.Then, experiments were conducted to verify that the proposed RIS could dynamically reshape the beam direction.Finally, a host computer and field programmable gate array (FPGA) were used to realize the intelligent control of the coding sequences applied onto the proposed RIS.By changing the spatial phase distribution on the RIS aperture, the output beam could be controlled in real-time.By traversing the pre-loaded coding sequences, the enhancement of received signal in indoor wireless environments had been experimentally demonstrated.Both simulation and experiment results verify that the proposed RIS system can effectively and dynamically improve the quality of the indoor wireless signals.The received signal is increased by an average of 8.9 dB, with a maximum of 22 dB.The proposed work may provide basic hardware technical support for the optimization of 5G and the next-generation communication networks.

Key words: reconfigurable intelligent surface, wireless communication, indoor signal enhancement, microwave

中图分类号:

TN92

唐奎, 胡琪, 赵俊明, 陈克, 冯一军. 基于RIS的室内无线通信信号增强系统[J]. 通信学报, 2022, 43(12): 24-31.

Kui TANG, Qi HU, Junming ZHAO, Ke CHEN, Yijun FENG. RIS-based indoor wireless communication signal enhancement system[J]. Journal on Communications, 2022, 43(12): 24-31.

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基于RIS的室内无线通信信号增强系统

RIS-based indoor wireless communication signal enhancement system

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