TS模式下STAR-RIS辅助的多用户无线系统波束成形设计

刘刚; 李铭泰; 潘澄; 郭漪; 付少忠

doi:10.11959/j.issn.1000-0801.2024244

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TS模式下STAR-RIS辅助的多用户无线系统波束成形设计

研究与开发 | 更新时间：2025-03-17

- TS模式下STAR-RIS辅助的多用户无线系统波束成形设计
- STAR-RIS assisted multi-user wireless system beamforming design in TS mode
- 电信科学 2024年40卷第11期页码：16-26
- 作者机构：
  
  西安电子科技大学空天地一体化综合业务网全国重点实验室，陕西西安 710068
- 作者简介：
  
  [ "刘刚（1977- ），男，博士，西安电子科技大学教授，主要研究方向为宽带无线传输技术。" ]
  [ "李铭泰（2001- ），男，西安电子科技大学硕士生，主要研究方向为宽带无线通信、智能超表面技术。" ]
  [ "潘澄（1999- ），男，西安电子科技大学硕士生，主要研究方向为宽带无线通信、智能超表面技术。" ]
  [ "郭漪（1977- ），女，博士，西安电子科技大学副教授，主要研究方向为B5G/6G智能传输关键技术。" ]
  [ "付少忠（1975- ），男，博士，西安电子科技大学副教授，主要研究方向为宽带无线通信技术。" ]
- 基金信息：
  
  国家自然科学基金资助项目(62171354);陕西省自然科学基金资助项目(2024JC-YBMS-533)
- DOI：10.11959/j.issn.1000-0801.2024244
  中图分类号： TN92
- 收稿日期：2024-07-13，
  
  修回日期：2024-10-17，
  
  纸质出版日期：2024-11-20
- 稿件说明：
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刘刚,李铭泰,潘澄等.TS模式下STAR-RIS辅助的多用户无线系统波束成形设计[J].电信科学,2024,40(11):16-26.

LIU Gang,LI Mingtai,PAN Cheng,et al.STAR-RIS assisted multi-user wireless system beamforming design in TS mode[J].Telecommunications Science,2024,40(11):16-26.
刘刚,李铭泰,潘澄等.TS模式下STAR-RIS辅助的多用户无线系统波束成形设计[J].电信科学,2024,40(11):16-26. DOI： 10.11959/j.issn.1000-0801.2024244.

LIU Gang,LI Mingtai,PAN Cheng,et al.STAR-RIS assisted multi-user wireless system beamforming design in TS mode[J].Telecommunications Science,2024,40(11):16-26. DOI： 10.11959/j.issn.1000-0801.2024244.

摘要

同时透射与反射可重构智能表面（simultaneously transmitting and reflecting reconfigurable intelligent surface，STAR-RIS）具有同时透射与反射的特性，能够将传统RIS（conventional RIS，CRIS）的通信能力从半空间扩展至全空间。针对STAR-RIS辅助下的多用户多输入单输出（multiple-input single-output，MISO）通信系统，提出了一种基于时间切换（time switch，TS）模式的波束成形算法，以实现发射功率最小化。该算法首先通过最大比传输（maximum ratio transmission，MRT）得到基站初始发射波束，然后利用TS时隙正交性和信道增益最大化（channel gain maximum，CGM）将非凸优化问题解耦为恒模非凸问题和半正定规划（semi-definite programming，SDP）问题，最后利用流形优化与内点法联合求解。仿真结果表明，STAR-RIS相比CRIS可以有效降低发射功率；所提算法在相同信干噪比下，比主流算法具有更低的发射功率；TS模式在低信干噪比下相较于能量分裂（energy split，ES）模式具有更低的发射功率。

Abstract

Simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS) has the capability of simultaneous transmission and reflection

extending the communication capacity of conventional RIS (CRIS) from half-space to full-space. For the multi-user multiple-input single-output (MISO) communication system assisted by STAR-RIS

a beamforming algorithm based on time switch (TS) mode was proposed to minimize transmission power. Firstly

maximum ratio transmission (MRT) was used to get the initial BS transmitting beamforming. Secondly

TS slot orthogonality and channel gain maximum (CGM) were used to decouple the non-convex problem into the constant mode non-convex problem and the semi-definite programming (SDP) problem. Finally

manifold optimization and interior point method were used to jointly solve these problems. The simulation results show that

STAR-RIS can effectively reduce the transmission power compared with conventional RIS. Under the same SINR（signal-to-noise ratio）. The proposed algorithm has lower transmitting power than the mainstream algorithm. TS mode has lower transmitting power than energy splitting (ES) mode at low SINR.

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references

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