低真空管道高速磁浮交通无线通信系统性能评估方法研究  

Study on the Performance Evaluation Method of Wireless Communication System for Low Vacuum Tube High-speed Maglev Traffic

作　　者：刘鹏辉 董航 王达 李少伟 宋铁成[3] 陈建平 LIU Penghui;DONG Hang;WANG Da;LI Shaowei;SONG Tiecheng;CHEN Jianping

机构地区：[1]东南大学移动通信全国重点实验室,南京211189 [2]中国航天科工集团磁悬浮与电磁推进技术总体部,北京100097 [3]东南大学移动通信全国重点实验室,南京210096 [4]南京泰通科技股份有限公司,南京210039

出　　处：《铁道通信信号》2024年第11期58-69,共12页Railway Signalling & Communication

基　　金：国家重点研发计划重点专项项目(2020YFB1807200)。

摘　　要：由于受列车高速移动引入的多普勒频谱扩展影响较小,基于泄漏电缆架构的无线通信技术在管道或隧道场景内的高铁移动通信中得到广泛应用。考虑到多普勒频移和电波传播损耗随着载波频率的降低而减小,采用700 MHz标准频段的5G系统被认为是实现低真空管道高速磁浮交通中无线通信的关键途径。面向该通信场景,基于几何单跳多输入多输出泄漏电缆信道模型,分析和对比高速移动场景下视距、非视距的多普勒频谱特征。在此基础上,基于5G标准帧结构,采用一种低复杂度的最小均方误差时域信道估计方法,评估信道估计的归一化均方误差性能,并仿真对比相应系统的频谱效率和误块率性能。仿真结果表明,基于泄漏电缆的700 MHz频段5G系统能够支撑最高速度达1000 km/h的低真空管道高速磁浮交通无线通信应用。With the relatively small impact of Doppler spread introduced by high-speed movement,wireless communication technology based on leaky coaxial cables is widely applied to the mobile communication of high-speed train in pipeline or tunnel scenarios.Considering that Doppler shift and radio wave propagation loss decrease with lower carrier frequency,the 5G system using the standard frequency band at 700 MHz is considered as a key approach to achieve the communication of low vacuum tube high-speed maglev traffic.Based on the geometrically-based single-bounce multiple-input-multiple-output channel model with leaky coaxial cables,the Doppler spectrum of line of sight and non-line of sight in high-speed mobility for this communication scenario is analyzed and compared in this paper.Meanwhile,based on the 5G standard frame structure,a low complexity minimum mean square error time-domain channel estimation method is adopted and the normalized mean square error performance for the channel estimation is evaluated.Correspondingly,the system performance of the spectral efficiency and block error rate are simulated and compared.The simulation results indicate that the 5G system based on leaky coaxial cables at 700 MHz frequency band can support wireless communication of low vacuum tube high-speed maglev traffic with a maximum speed of 1000 km/h.

关 键 词：低真空管道高速磁浮交通 泄漏电缆 多普勒频谱 5G系统 性能评估 

分 类 号：U285.2[交通运输工程—交通信息工程及控制]