RIS辅助多用户波束跟踪系统与硬件试验

丁陈龙; 许文俊; 张鸿涛

doi:10.11959/j.issn.1000-0801.2024186

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RIS辅助多用户波束跟踪系统与硬件试验

专题：6G智能超表面 | 更新时间：2024-08-14

- RIS辅助多用户波束跟踪系统与硬件试验
- RIS-assisted multi-user beam tracking system and hardware experiment
- 电信科学 2024年40卷第7期页码：13-24
- 作者机构：
  
  北京邮电大学泛网无线通信教育部重点实验室，北京 100876
- 作者简介：
  
  [ "丁陈龙（2000- ），男，北京邮电大学泛网无线通信教育部重点实验室博士生，主要研究方向为智能超表面、电磁单元设计和基于智能超表面的无线通信系统。" ]
  [ "许文俊（1982- ），男，博士，北京邮电大学泛网无线通信教育部重点实验室教授、博士生导师，IEEE高级会员，主要研究方向为无线大数据、无人机通信及网络、5G通信网络、智慧物联网等。" ]
  [ "张鸿涛（1980- ），男，博士，北京邮电大学泛网无线通信教育部重点实验室教授、博士生导师，IEEE高级会员，主要研究方向为宽带移动通信系统、网络融合、智能超表面系统等。" ]
- 基金信息：
  
  国家自然科学基金资助项目(62271082)
- DOI：10.11959/j.issn.1000-0801.2024186
  中图分类号： TP929.5
- 收稿日期：2024-06-23，
  
  修回日期：2024-07-15，
  
  纸质出版日期：2024-07-20
- 稿件说明：
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丁陈龙,许文俊,张鸿涛.RIS辅助多用户波束跟踪系统与硬件试验[J].电信科学,2024,40(07):13-24.

DING Chenlong,XU Wenjun,ZHANG Hongtao.RIS-assisted multi-user beam tracking system and hardware experiment[J].Telecommunications Science,2024,40(07):13-24.
丁陈龙,许文俊,张鸿涛.RIS辅助多用户波束跟踪系统与硬件试验[J].电信科学,2024,40(07):13-24. DOI： 10.11959/j.issn.1000-0801.2024186.

DING Chenlong,XU Wenjun,ZHANG Hongtao.RIS-assisted multi-user beam tracking system and hardware experiment[J].Telecommunications Science,2024,40(07):13-24. DOI： 10.11959/j.issn.1000-0801.2024186.

摘要

可重构智能表面（reconfigurable intelligent surface，RIS，也称智能超表面）通过智能调控电磁传播路径，有效提高了6G通信系统的性能。然而，RIS集成大量反射单元使得多波束调控复杂度高、码本搜索空间大，导致实时调控能力不足，难以应用于多用户波束跟踪。为提升RIS在多用户移动场景的适用性，创新基于逆衍射的场源迭代模型，快速生成近远场多用户调控码本，设计RIS辅助单基站定位方案，感知用户移动位置实时切换波束。研制RIS辅助多用户波束跟踪系统原型，实现多用户移动过程中快速波束对准。试验结果表明，毫秒级波束切换可实现移动多用户的实时信息传输。

Abstract

Reconfigurable intelligent surface (RIS) effectively improves the performance of 6G communication systems by intelligently controlling the electromagnetic propagation path. However

the integration of a large number of reflecting elements in RIS increases the complexity of multi-beam control and enlarges the codebook search space

leading to insufficient real-time control capabilities and difficulties in multi-user beam tracking. To enhance the applicability of RIS in multi-user mobile scenarios

an innovative inverse diffraction-based field source iterative model was proposed to rapidly generate near- and far-field multi-user control codebooks. A RIS-assisted single base station positioning scheme was designed to sense the movement of users and switch beams in real-time. A prototype of a RIS-assisted multi-user beam tracking system was developed

enabling fast beam alignment during multi-user mobility. Experimental results show that millisecond-level beam switching can achieve real-time information transmission for mobile multi-users.

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