地铁无线通信系统电磁干扰分析及解决方案研究

发布时间：2018-12-11 07:45

【摘要】：目前地铁内存在多个无线通信系统，主要包含专用800MHz集群无线通信系统、民用移动通信引入系统、公安350MHz模拟/数字集群无线通信系统，PIS的车地无线网络系统、信号CBTC的车地无线网络系统。无线通信系统种类多、频谱宽度大，电磁干扰多，不利于系统的正常稳定运行，甚至影响地铁运营的安全。因此，根据国内地铁无线通信系统的建设、调试和开通经验来看，无线通信系统之间的电磁干扰分析及解决方案至关重要。本论文首先分析了地铁存在的各个无线通信系统以及无线电磁环境的现状，包括频率现状和空域现状，其次又分析了无线系统内部的干扰以及无线系统间的干扰。在此基础上，针对形成的干扰寻求无线电磁干扰的解决方案，通过数学确定性计算提出了抗干扰的技术措施和工程措施，例如提高系统间的隔离度、采用跳频技术、合理选择无线覆盖方式、增加频率保护带、限制设备参数等一系列方式方法。最后，制定测试大纲进行现场测试，对地铁内各无线通信系统之间的干扰进行分析，验证了提出的抗干扰解决方案的可行性和正确性。根据研究的结论，通过CAD软件制图合理布局各个无线通信系统天线/漏泄电缆，绘制了相关工程设计图纸（见图4-3～图4-11），，对城市地铁无线通信系统的设计具有指导意义。
[Abstract]:At present, there are many wireless communication systems in subway, mainly including dedicated 800MHz trunking wireless communication system, civil mobile communication introduction system, public security 350MHz analog / digital trunking wireless communication system, PIS vehicle-ground wireless network system. Signal CBTC vehicle-ground wireless network system. There are many kinds of wireless communication systems, large spectrum width and many electromagnetic interference, which is not conducive to the normal and stable operation of the system, and even affects the safety of subway operation. Therefore, according to the experience of domestic subway wireless communication system construction, debugging and opening, it is very important to analyze and solve the electromagnetic interference between wireless communication systems. This paper firstly analyzes the existing wireless communication systems and wireless electromagnetic environment, including frequency and airspace, and then analyzes the interference within the wireless system and the interference between wireless systems. On the basis of this, in order to find the solution of wireless electromagnetic interference, the technical and engineering measures of anti-jamming are put forward through mathematical deterministic calculation, such as improving the isolation between systems and adopting frequency hopping technology. A series of methods such as reasonable selection of wireless coverage, increasing frequency protection band, limiting equipment parameters and so on. Finally, the test outline is developed for field testing, and the interference between various wireless communication systems in the subway is analyzed, which verifies the feasibility and correctness of the proposed anti-jamming solution. According to the conclusion of the study, the related engineering design drawings are drawn by using CAD software to map the antenna / leakage cables of various wireless communication systems (see Fig. 4-3 ~ Fig. 4-11). It is of guiding significance to the design of urban subway wireless communication system.
【学位授予单位】：苏州大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN929.5

【相似文献】