隧道环境下车地 LTE-M 系统时变信道仿真

doi:10.12066/j.issn.1007-2861.1893

上海大学学报(自然科学版) ›› 2019, Vol. 25 ›› Issue (1): 45-55.doi: 10.12066/j.issn.1007-2861.1893

隧道环境下车地 LTE-M 系统时变信道仿真

吴慧泽, 郑国莘()

上海大学特种光纤与光接入网省部共建重点实验室,上海 200444

收稿日期:2017-03-03 出版日期:2019-02-28 发布日期:2019-02-26
通讯作者: 郑国莘 E-mail:gxzheng@staff.shu.edu.cn
基金资助:
国家自然科学基金面上资助项目(61571282)

Simulation of time-variant channel for train-ground LTE-M system in tunnel environment

WU Huize, ZHENG Guoxin()

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200444, China

Received:2017-03-03 Online:2019-02-28 Published:2019-02-26
Contact: ZHENG Guoxin E-mail:gxzheng@staff.shu.edu.cn

摘要/Abstract

摘要：

为建设物理信道检测平台以验证 TD-LTE (time division long term evolution) 技术用于轨道交通基于通信的列车控制 (communication based train control, CBTC), 从而实现无线通信的可靠性. 对车地通信信道建模, 并采用时频分析方法研究了在隧道环境下的车地无线时变信道, 特别是列车经过轨旁基站时激烈变化的多普勒效应, 提出了基于乘性扩展因子实现信号多普勒扩展的方法, 建立了适用于射频电路物理实现的信道仿真模型, 并利用射线跟踪法仿真验证了该方法的正确性.

关键词: TD-LTE, 隧道环境, 时变信道, 多普勒扩展

Abstract:

To build a physical channel test platform to validate reliability of time division long term evolution (TD-LTE) technology for rail transit communication based train control (CBTC), it is necessary to set up a train-ground communication channel model. In this paper, a time-frequency analysis method is used to study the Doppler effect of a wireless time-varying channel in tunnel environments, especially when the train passes through the rail-side base station. Doppler spread based on a multiplicative spread factor is proposed. A channel model suited to physical realization with RF circuits is established. Effectiveness of the method is verified by ray tracing.

Key words: time division long term evolution (TD-LTE), tunnel environment, time-variant channel, Doppler spread

中图分类号:

TN929.5

吴慧泽, 郑国莘. 隧道环境下车地 LTE-M 系统时变信道仿真[J]. 上海大学学报(自然科学版), 2019, 25(1): 45-55.

WU Huize, ZHENG Guoxin. Simulation of time-variant channel for train-ground LTE-M system in tunnel environment[J]. Journal of Shanghai University（Natural Science Edition）, 2019, 25(1): 45-55.

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隧道环境下车地 LTE-M 系统时变信道仿真

Simulation of time-variant channel for train-ground LTE-M system in tunnel environment

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