CBTC系统在隧道情景下无线通信干扰的研究

发布时间：2018-01-08 03:19

本文关键词：CBTC系统在隧道情景下无线通信干扰的研究　出处：《华南理工大学》2014年硕士论文　论文类型：学位论文

更多相关文章： CBTC WLAN 便携式WIFI 干扰测试

【摘要】：目前，我国北京、上海、广州、深圳等一线城市在现有基础上继续加快城市轨道交通的建设，一些二三线城市也积极筹备上马城市轨道交通建设；而CBTC系统由于具备技术先进、兼容性强、运输能力强等特点，成为各地城市轨道交通新建线路列车控制系统的首选。但是由于城市轨道交通隧道内电磁环境的复杂性，一些外来信号易对CBTC系统造成干扰，对城市轨道交通的正常、安全运营造成影响。本文结合广州地铁开展的CBTC系统干扰测试，对CBTC系统的干扰测试进行研究和总结。论文首选介绍了移动闭塞原理、CBTC系统的组成及功能、阐述CBTC系统三种无线覆盖方式、使用的无线局域网技术及其无线信道。其次，针对无线电磁波在隧道中的传播特点及隧道内分布的无线频段，分析CBTC系统无线干扰的原因，借助WLAN信道间干扰因子对PIDS系统及便携式WIFI对CBTC系统干扰影响程度进行分析。最后，根据无线干扰理论分析，对隧道情景下便携式WIFI设备对CBTC系统天线、波导管和漏缆等三种无线覆盖方式的无线干扰进行现场测试及分析，并对比分析干扰对上述三种无线覆盖方式传输性能的影响。本文仅集中于目前城市轨道交通隧道情景的无线电磁环境进行分析研究，尚有不少挑战性的课题有待研究，如商用WLAN引入及2.3GHz频段TDD LTE信号引入后对CBTC系统的干扰等等，都值得今后继续深入研究。
[Abstract]:At present , the first - tier cities such as Beijing , Shanghai , Guangzhou and Shenzhen continue to speed up the construction of urban rail transit on the existing basis , and some of the second - third - line cities are actively preparing for the construction of urban rail transit in the city . However , the CBTC system is the first choice for the construction of the new line train control system for urban rail transit in various places due to the advanced technology , strong compatibility and strong transport capacity . However , due to the complexity of the electromagnetic environment in the urban rail transit tunnel , some foreign signals can easily interfere with CBTC system , and have an impact on the normal and safe operation of urban rail transit . This paper studies and summarizes the interference test of CBTC system based on the interference test of CBTC system in Guangzhou Metro . The paper introduces the principle of moving block , the composition and function of CBTC system , expounds the three wireless coverage methods of CBTC system , the wireless local area network technology and its wireless channel . Secondly , aiming at the propagation characteristics of wireless electromagnetic waves in the tunnel and the wireless frequency bands distributed in the tunnel , the causes of the wireless interference of the CBTC system are analyzed , and the interference influence degree of the CBTC system is analyzed by means of the interference factors between the WLAN channels . Finally , according to the wireless interference theory analysis , the wireless interference of three kinds of wireless coverage modes , such as antenna , waveguide and leaky cable of CBTC system , is tested and analyzed in the tunnel scene , and the influence of interference on the transmission performance of the above three wireless coverage modes is compared . This paper focuses on the analysis and research on the radio magnetic environment of the current urban rail transit tunnel situation . There are still many challenging topics to be studied , such as the introduction of commercial WLAN and the interference of the CBTC system after the introduction of the 2.3 GHz frequency band TDD LTE signal , and so on .

【学位授予单位】：华南理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92;TN972

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