交通运输系统工程与信息

交通运输系统工程与信息 ›› 2006, Vol. 6 ›› Issue (1): 47-50 .

• 智能交通系统与信息技术 • 上一篇    下一篇

基于OFDM技术的铁路无线数据通信系统研究

蒋秋华1，杨大成1，沈海燕2，李琴2   

  1. 1.北京邮电大学电信工程学院无线通信中心，北京100082；
    2.铁道科学研究院电子计算技术研究所，北京100082
  • 收稿日期:2005-12-10 修回日期:1900-01-01 出版日期:2006-02-20 发布日期:2006-02-20

Research on the Railway Wireless Data
Communication Systems Based on OFDM

JIANG Qiu-hua1， YANG Da–cheng1， SHEN Hai-yan2，LI Qin2   

  1. 1.School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 1082，China； 2. China Academy of Railway Sciences, Beijing 100082, China
  • Received:2005-12-10 Revised:1900-01-01 Online:2006-02-20 Published:2006-02-20

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摘要： 面对行车安全监控无线数据通信的迫切需求，我国铁路传统的450MHz的模拟无线通信系统显得无能为力.而正在实施的GSM-R通信系统主要服务于行车调度业务，其容量和技术体制也难以满足这种要求.通过综合集成当今先进成熟的移动通信技术，包括正交频分复用(OFDM)技术、无线局域网技术和移动IP技术，提出了一种新的基于OFDM调制技术的铁路无线数据通信系统设计.该系统在2MHz的频率带宽内，数据通信速率最高可达4.86Mbps，可以容忍的时延扩展为2.5 us.

关键词: OFDM, 移动IP, 铁路无线通信, 无线局域网

Abstract: The 450MHz analogue wireless communication systems are incompetent, to meet urgent requirements of the mobile train operation safety data communication. What’s more，the upcoming GSM-R of China Railway serves mainly for train dispatching, which cannot meet the requirements too. By the integration of such mobile technologies as orthogonal frequency division multiply (OFDM)，wireless local network (WLAN)，mobile IP, an innovative design of wireless data communication system for China Railway is proposed in this paper. This system can implement 4.86Mbps data rate and tolerate 2.5 s time delay spread.

Key words: OFDM, Mobile IP, Railway wireless communication, WLAN