How to Deploy RIS to Minimize Delay Spread in HST Communications: Railroad Side, or Train Side?

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)

Abstract

High-speed train (HST) communications are challenging due to fast time-varying channels and Doppler effects. Recently, reconfigurable intelligent surface (RIS) has been envisioned to be one of the most promising technologies for tackling the difficult problems of HST communications. In this paper, we first propose a transmission model of the HST communication system using RIS on the train side. Then, different strategies for mitigating delay spread (DS) are compared from the perspectives of the phase shift set design and deployment of the RIS. In addition, we derive the spectral efficiency (SE) expression of the proposed system. Numerical evaluations validate the analytical results and reveal that the RIS on the train side not only increases SE but also reduces DS.

Original languageEnglish
Title of host publication2022 IEEE 22nd International Conference on Communication Technology, ICCT 2022
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages793-797
Number of pages5
ISBN (Electronic)9781665470674
DOIs
Publication statusPublished - 2022
Event22nd IEEE International Conference on Communication Technology, ICCT 2022 - Virtual, Online, China
Duration: 11 Nov 202214 Nov 2022

Publication series

NameInternational Conference on Communication Technology Proceedings, ICCT
Volume2022-November-November

Conference

Conference22nd IEEE International Conference on Communication Technology, ICCT 2022
Country/TerritoryChina
CityVirtual, Online
Period11/11/2214/11/22

Keywords

  • Doppler effect
  • Reconfigurable intelligent surface
  • delay spread
  • high-speed train communications
  • spectral efficiency

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