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LED交通灯的光通信系统信道建模与分析

Channel Modeling and Analysis for Optical Communication System of LED Traffic Lights

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摘要

LED交通灯作为智能交通系统中的光通信媒介具有广泛的应用前景。只有对LED交通灯的通信传播信道特征有充分了解才能确保所设计的可见光 通信系统具备令人满意的性能,而构建信道模型则是一种花费比较小且较为灵活的替代手段。采用微分元素表征方案构建直射链路和一次路 面反射链路的信道模型,分析了典型天气条件、接收机位置、传输距离和不同路面反射对通信系统传输特性的影响。仿真结果表明:信道 建模时应忽略沥青和积水路面漫反射对通信的影响,考虑冰和积雪路面漫反射对信号接收的影响;汽车距离光源表面越近,接收信号越强; 同时验证了接收机安装在汽车顶部接收信号的效果最佳。

Abstract

As medium of optical communication in the intelligent transportation system, LED light has wide application prospect. To ensure that the design of the visible light communication system has satisfactory performance, transmission characteristics of LED traffic lights in the communication channel should be fully understood, and construction of the channel model is a small cost and more flexible alternative means. The project of differential element is chosen to construct the channel model of direct link and reflection link, the impacts of typical weather condition, receiver position, transmission distance and different reflective pavement on systematic transmission performance are analyzed. Simulation results show that the effects of asphalt and water surface reflectance on the experimental result can be ignored in the channel modeling, while the impact of ice and snow road surface diffuse on reception should be considered; the closer the distance between car and light source is, the stronger the received signal is; at the same time, it is verified that the received signal is the best when the receiver is installed on the top of the car.

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中图分类号:TN929.1

DOI:10.3969/j.issn.1673-6141.2017.03.008

所属栏目:光电技术

基金项目:Supported by National Natural Science Foundation of China(国家自然科学基金,61501266), Inner Mongolia Natural Science Foundation of China(内蒙古自然科学基金,2015MS0625)

收稿日期:2016-08-17

修改稿日期:2016-12-26

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秦岭:长安大学电子与控制工程学院, 陕西西安 710064内蒙古科技大学信息工程学院,内蒙古包头 014010
郝雅楠:内蒙古科技大学信息工程学院,内蒙古包头 014010
杜永兴:内蒙古科技大学信息工程学院,内蒙古包头 014010
巨永锋:长安大学电子与控制工程学院, 陕西西安 710064

联系人作者:秦岭(qinling1979@imust.edu.cn)

备注:秦岭(1979-),女, 汉族,内蒙古包头市人,博士,副教授,主要从事无线光通信技术方面的研究。

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引用该论文

QIN Ling,HAO Yanan,DU Yongxing,JU Yongfeng. Channel Modeling and Analysis for Optical Communication System of LED Traffic Lights[J]. Journal of Atmospheric and Environmental Optics, 2017, 12(3): 221-229

秦岭,郝雅楠,杜永兴,巨永锋. LED交通灯的光通信系统信道建模与分析[J]. 大气与环境光学学报, 2017, 12(3): 221-229

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