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| 引用本文： | 丁树奎.????????????????е???÷???[J].交通运输系统工程与信息,2011,11(4):55-60. |
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| 作者姓名： | 丁树奎 |
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| 作者单位： | ?????й???????????????????????? 100037 |
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| 摘 要： | 针对目前广泛应用于城市轨道交通信号系统中，基于IEEE802.11系列标准的两种WLAN传输方式——空间自由波和波导管. 简要分析两种传输方式的工程和技术特点. 深入分析WLAN射频覆盖和通信机制. 结合北京轨道交通亦庄、昌平线组合传输方法的应用实例，提出空间自由波和波导管进行组合的组合传输无线覆盖方式，并简要介绍车地无线通信系统的系统结构和工作方式，无线AP的性能特点和分布原则. 计算WLAN自由空间损耗、信号接收强度、链路系统裕量. 提出WLAN技术在信号系统车地通信中应用的前景.
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| 关 键 词： | ???н?? ?????? ?????? ??????? ???????????WLAN?? ????????AP?? |
| 收稿时间： | 2011-04-20 |
Application and Analysis of Combination Transmission in Urban Rail Transit Signal System |
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| DING Shu-kui.Application and Analysis of Combination Transmission in Urban Rail Transit Signal System[J].Transportation Systems Engineering and Information,2011,11(4):55-60. |
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| Authors: | DING Shu-kui |
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| Institution: | Beijing MTR Construction Administration Corporation, Beijing 100037, China |
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| Abstract: | In this paper,the IEEE802.11 series-based WLAN transmission modes are proposed: space free wave and waveguide,which have been widely used in urban rail transit signal system.The engineering characteristics and technical features of these two modes are briefly introduced,and the WLAN radio frequency coverage and communication mechanism are deeply analyzed.Baesd on the implementation in subway lines Yizhuang and Changping,the wireless coverage of space free wave and waveguide combination transmission are docu... |
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| Keywords: | urban traffic rail transit combination transmission train-ground communication wireless local area networks(WLAN) wireless access points |
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