| ETC系统的邻道干扰问题分析及射频指标控制 |
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| 引用本文： | 胡宾,李全发,高文宝.ETC系统的邻道干扰问题分析及射频指标控制[J].公路交通科技,2011(Z1). |
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| 作者姓名： | 胡宾 李全发 高文宝 |
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| 作者单位： | 北京快通高速路电子收费系统有限公司; |
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| 摘 要： | 基于国标ETC车道系统的实际运行情况,分析了邻道干扰产生的主要原因,利用建立的邻道干扰车道模型和坐标系,采用边界分析法计算了与解决邻道干扰相关的天线方向性图约束条件和与之相关的射频指标约束条件,提出了OBU截止电平的概念。研究表明:在合理的工程安装条件下,通过设定必要的设备射频指标约束,可在保证OBU与本车道RSU正常通信质量的基础上,切断OBU和相邻车道RSU通信的下行通信链路,同时,在上行链路上采用相邻车道不同信道配置和采用RSU窄带接收,从而防止避免邻道干扰的产生。最后根据理论分析和计算,结合工程实际应用,给出了可供参考的RSU天线方向性图约束条件和OBU接收射频参数范围。
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| 关 键 词： | 邻道干扰 截止电平 边界分析法 电子收费 坐标系 方向性图 |
RF Interference from Adjacent Lane and Selection of RF Parameters for ETC System |
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| HU Bin,LI Quanfa,GAO Wenbao.RF Interference from Adjacent Lane and Selection of RF Parameters for ETC System[J].Journal of Highway and Transportation Research and Development,2011(Z1). |
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| Authors: | HU Bin LI Quanfa GAO Wenbao |
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| Institution: | HU Bin,LI Quanfa,GAO Wenbao(Beijing Kuaitong Expressway Electronic Toll Collection System Co.,Ltd.,Beijing 100161,China) |
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| Abstract: | Based on the actual operation of ETC lane system produced according to China national standard,main causes of RF interference from adjacent lane are analyzed at first.After the modeling of RF interference between lanes and establishing of coordination systems,the method of boundary analysis is adopted to calculate and analyze the constraints of RSU antenna directional pattern and related OBU RF parameters,and the definition of cut-off level for OBU receiver is given.The research shows that(1) with reasonabl... |
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| Keywords: | RF reference from adjacent lane cut-off level method of boundary analysis ETC coordination system directional pattern |
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