移动通信2025，Vol.49Issue(11)：62-71,10.DOI:10.3969/j.issn.1006-1010.20250917-0001
移动场景下基于RIS的波束追踪系统设计
Beam Tracking System Based on Reconfigurable Intelligent Surface in Mobile Scenarios
王昊健 1李卢初 1潘存华 1任红1
作者信息
- 1. 东南大学移动通信国家重点实验室,江苏 南京 210096
- 折叠
摘要
Abstract
Targeting beam alignment and tracking challenges in mobile millimeter-wave communications,this paper designs and implements a reconfigurable intelligent surface(RIS)-based beam tracking system operating at 28 GHz.The system integrates an RIS with dual-ended four-channel phased arrays,establishing a closed-loop architecture encompassing signal generation,RIS phase control,power feedback,and optimization.An improved hierarchical beam scanning algorithm is proposed to mitigate power observation noise and main lobe misidentification in mobile environments.Indoor experiments show that the system achieves approximately 20 dB received power gain within the main bandwidth compared to non-RIS configurations or conventional hierarchical scanning,with substantially reduced in-band fluctuations.Mean I/Q amplitude doubles,and constellation diagrams evolve from scattered to well-clustered patterns.The results demonstrate that RIS spatial focusing and the proposed algorithm effectively improve alignment efficiency and tracking stability for mobile millimeter-wave applications.关键词
毫米波通信/可重构智能表面/波束追踪/分级扫描Key words
millimeter-wave communications/reconfigurable intelligent surface/beam tracking/hierarchical scanning分类
信息技术与安全科学引用本文复制引用
王昊健,李卢初,潘存华,任红..移动场景下基于RIS的波束追踪系统设计[J].移动通信,2025,49(11):62-71,10.
