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应用科学学报 >

2015 , Vol. 33 >Issue 4: 389 - 398

DOI: https://doi.org/10.3969/j.issn.0255-8297.2015.04.005

信号与信息处理

地铁隧道内多径信道的统计特性

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  • 上海大学特种光纤与光接入网省部共建教育部重点实验室，上海200072
通信作者：郑国莘，教授，博导，研究方向：通信信号处理、限定空间通信，E-mail: gxzheng@staff.shu.edu.cn

收稿日期: 2014-05-30

  修回日期: 2014-09-22

  网络出版日期: 2014-09-22

基金资助

国家自然科学基金(No.61132003, No.61171086)；上海市特种光纤与光接入网重点实验室开放课题基
金(No.SKLSFO2011-04)资助

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Statistical Characteristics of Multipath Channel in Subway Tunnel

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  • Key Laboratory of Specialty Fiber Optics and Optical Access Networks,
    Shanghai University, Shanghai 200072, China

Received date: 2014-05-30

  Revised date: 2014-09-22

  Online published: 2014-09-22

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摘要

由于地铁隧道内电波的多径特性以及特殊的环境结构，其他环境下的电波传播理论不适用. 为此，利用射线跟踪法及无线电统计理论分析了典型地铁隧道环境下多径时变信道的时延扩展、多普勒频谱扩展及多普勒频偏. 仿真结果表明，多普勒频谱扩展和多普勒频偏随信号频率和列车移动速度的增加而增加，而RMS时延扩展随信号频率的增加而减小. 以上结论可以为4G、5G系统在地铁中的应用提供理论依据.

关键词： 地铁隧道; 多径信道; RMS时延扩展; 多普勒扩展; 射线跟踪

本文引用格式

陈晓， 潘韵天， 武艺鸣， 郑国莘 . 地铁隧道内多径信道的统计特性[J]. 应用科学学报, 2015 , 33(4) : 389 -398 . DOI: 10.3969/j.issn.0255-8297.2015.04.005

Abstract

Due to multipath characteristics and the special structure, electromagnetic
wave propagation in subway tunnel greatly differs from other confined space. In this paper,
statistical characteristics such as root mean square (RMS) delay spread and Doppler spread
and Doppler shift of multipath channel in a typical subway tunnel are analyzed using the
ray-tracing method and the radio statistics theory. Simulation results show that Doppler
spread and shift increase with higher frequency and velocity. However, RMS delay spread
is smaller with higher frequency. Simulation results provide a reference for 4G and 5G
applications in subway.

Key words： subway tunnel; multipath channel; RMS delay spread; Doppler spread; raytracing

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