城市轨道交通CBTC系统2.4GHz无线传输技术的应用研究

鉴于采用IEEE802.11标准ISM2.4GHz开放频段基于通信的列车控制系统(CBTC)在城市轨道交通应用中被外界采用相同标准和频谱的WiFi信号干扰,而造成停车事故,影响列车正常运营;为此,通过对CBTC系统采用的无线传输技术分析和研究,提出目前CBTC系统无线传输技术存在的问题和无线干扰处理方法及未来城市轨道交通CBTC系统车地无线通信技术的发展方向。

Application Research on 2.4 GHz Wireless Transmission Technology of CBTC System used in Urban Rail Transit

Communication-Based Train Control System(CBTC) with IEEE802.11 standard ISM2.4GHz opening frequency band in urban rail transit system is often interfered by WiFi signal with the same standard and same spectrum used in the outside,then the shutdown accident may be caused by this interference and the normal operation of the train will be influenced.To solve this problem,through analysis and research on wireless transmission technology adopted in CBTC system,the author points out the existing problems in wireless transmission technology and the solutions for the wireless interference,also proposes the development direction of the train-ground wireless communication technology of CBTC system used in urban rail transit system in future.