高铁场景下多用户OTFS系统的上行多址传输方案

丁青锋; 徐战波

doi:10.11959/j.issn.1000-0801.2025112

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高铁场景下多用户OTFS系统的上行多址传输方案

研究与开发 | 更新时间：2025-06-28

- 高铁场景下多用户OTFS系统的上行多址传输方案
- Uplink multiple access transmission scheme for multi-user OTFS systems in high-speed rail scenarios
- 电信科学 2025年41卷第6期页码：48-56
- 作者机构：
  
  华东交通大学电气与自动化工程学院，江西南昌 330013
- 作者简介：
  
  [ "丁青锋（1980- ），男，博士，华东交通大学电气与自动化工程学院教授、博士生导师，主要研究方向为大规模MIMO技术、智能电网通信、轨道无线通信等。" ]
  [ "徐战波（2000- ），男，华东交通大学电气与自动化工程学院硕士生，主要研究方向为OTFS调制技术和智能超表面等。" ]
- 基金信息：
  
  国家自然科学基金资助项目(62461024);江西省自然科学基金资助项目;The Natural Science Foundation of Jiangxi Province(20224ACB202001)
- DOI：10.11959/j.issn.1000-0801.2025112
  中图分类号： TN929.5
- 收稿日期：2024-11-25，
  
  修回日期：2025-03-09，
  
  纸质出版日期：2025-06-20
- 稿件说明：
移动端阅览
丁青锋,徐战波.高铁场景下多用户OTFS系统的上行多址传输方案[J].电信科学,2025,41(06):48-56.

DING Qingfeng,XU Zhanbo.Uplink multiple access transmission scheme for multi-user OTFS systems in high-speed rail scenarios[J].Telecommunications Science,2025,41(06):48-56.
丁青锋,徐战波.高铁场景下多用户OTFS系统的上行多址传输方案[J].电信科学,2025,41(06):48-56. DOI： 10.11959/j.issn.1000-0801.2025112.

DING Qingfeng,XU Zhanbo.Uplink multiple access transmission scheme for multi-user OTFS systems in high-speed rail scenarios[J].Telecommunications Science,2025,41(06):48-56. DOI： 10.11959/j.issn.1000-0801.2025112.

摘要

针对高速铁路快速移动所引起的高多普勒频移进而可实现速率受限的问题，基于时延分多址和多普勒分多址技术，提出了高铁场景多用户上行链路的正交时频空间（orthogonal time frequency space，OTFS）多址传输方案。首先，基于高铁场景建立OTFS多址的多用户系统模型；其次，在基站处将串行干扰消除应用于上行链路传输，利用多用户之间的信号差异消除干扰，实现对用户信号的正确检测；最后，根据互信息定理和迹运算的性质推导可实现速率的闭式表达式。仿真结果表明，相比于传统的多址传输方案，所提方案能更好地进行资源分配和抵抗多普勒频移，满足高速场景下车地通信上行传输的可实现速率需求。

Abstract

To address the high Doppler frequency shift and thus achievable rate limitation caused by rapid movement of the train

an orthogonal time frequency space (OTFS) multiple access transmission scheme was proposed based on the delay division multiple access and Doppler division multiple access techniques for the multi-user uplink in high-speed railway scenario. Firstly

a multi-user system model for OTFS multiple access was established based on the high-speed rail scenario. Secondly

the serial interference cancellation was applied to the uplink transmission at the base station to eliminate the interference by using the signal difference between the multiple users and achieve the correct detection of the user signals. Finally

the closed-form expression for the achievable rate was derived based on the mutual information theorem and the nature of the trace operation. Simulation results show that the proposed scheme has better performance of resources allocation and resistance to Doppler shift than the traditional multiple-access transmission scheme

which meets the achievable rate requirement of uplink vehicle-to-infrastructure communication in high-speed scenarios.

关键词

Keywords

references

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