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2.5μs.
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 mohile technologies as orthogonal frequency division multiply （OFDM）, wireless local area network （WLAN）, mobile IP, an innovative design of wireless data communication system for China Railway is proposed in this paper. This system can implement 4.86 Mhns data rate and tolerale 2.5 μs lime delay snread.
出处
《交通运输系统工程与信息》
EI
CSCD
2006年第1期47-50,共4页
Journal of Transportation Systems Engineering and Information Technology
基金
科技部科学院所专项基金(铁道安全监控数据高速移动接入系统)(NCSTE-2002-JKZX-185)
