LED交通灯的光通信系统信道建模与分析

大气与环境光学学报 ›› 2017, Vol. 12 ›› Issue (3): 221-229.

LED交通灯的光通信系统信道建模与分析

秦岭1,2, 郝雅楠2, 杜永兴2, 巨永锋1

( 1. 长安大学智电子与控制工程, 陕西西安 710064;
2. 内蒙古科技大学信息工程学院，内蒙古包头 014010)

收稿日期:2016-08-17 修回日期:2016-12-26 出版日期:2017-05-28 发布日期:2017-05-18
通讯作者: 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。 E-mail:qinling1979@imust.edu.cn
作者简介: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。
基金资助:
Supported by National Natural Science Foundation of China(国家自然科学基金项目（61501266）, Inner Mongolia Natural Science Foundation of China( 内蒙古自然科学基金,2015MS0625）

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

QIN Ling1,2, HAO Yanan2, DU Yongxing 2, JU Yongfeng1

(1.School of Electronic and Control Engineering, Chang'an University, Xi’an 710064, China;
2. College of Information Engineering, Inner Mongolia University of Science and Technology , Baotou 014010, China)

Received:2016-08-17 Revised:2016-12-26 Published:2017-05-28 Online:2017-05-18

摘要/Abstract

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。

关键词: LED交通灯, 光通信, 路面反射, 信道模型, 接收机

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.

Key words: LED traffic lights, optical communication, pavement reflection, channel model, receiver

中图分类号:

TN929.1

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.

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

参考文献

[1] Zhao Xu. Visible light wireless communication key technology [J]. Electronic Technology & Software Engineering, 2015(4): 60. 赵旭. 可见光无线通信关键技术 [J]. 电子技术与软件工程, 2015(4): 60 .
[2] Zhong Qiduan, Zhu Na, Zhu Jiang, et al. Diversity reception method of wireless communication based on LED traffic lights [J]. Laser & Optoelectronics Progress, 2008, 45(10): 51-55.
仲启端, 朱娜, 朱江, 等. 基于LED交通灯通信的分集接收方案 [J]. 激光与光电子学进展, 2008, 45(10): 51-55.
[3] Cossu G, Khalid A M, Choudhury P, et al. 3.4 Gbit/s visible optical wireless transmission based on RGB LED [J]. Opt. Express, 2012, 20(26): 501-506.
[4] Azhar A H, Tran T, O'Brien D. A gigabit/s indoor wireless transmission using MIMO-OFDM visible-light communications [J]. IEEE Photonic. Tech. L., 2013, 25(2): 171-174.
[5] Chen Tie. Design of L-PPM in wireless optical communication system based on FPGA [J]. Information Technology, 2015(2): 151-154(in Chinese).
陈铁. 基于FPGA无线光通信PPM调制解调的设计 [J]. 信息技术, 2015(2): 151-154.
[6] Tanaka Y, Haruyama S, Nakagawa M. Wireless optical transmissions with white colored LED for wireless home links [C]. The IEEE International Symposium on Personal, Indoor and Mobile Radio Communications. IEEE, 2000: 1325-1329.
[7] Komine T, Nakagawa M. Fundamental analysis for visible light communication system using LED light [J]. IEEE T. Consum. Electr., 2004, 50(1): 100-107.
[8] Ding Jupeng. Indoor Channel Modeling and Performance Optimization for Visible Light Communication [D]. Beijing: Doctorial Dissertaion of Beijing University of Posts and Telecommunications, 2013: 49-65(in Chinese).
丁举鹏. 可见光通信室内信道建模及性能优化 [D]. 北京: 北京邮电大学博士论文, 2013: 49-65.
[9] He Shengyang. Key Techniques of Indoor Visible Light Communication System [D]. Harbin: Doctorial Dissertation of Harbin Institute of Technology, 2013: 138(in Chinese).
何胜阳. 室内可见光通信系统关键技术研究 [D]: 哈尔滨: 哈尔滨工业大学博士论文,2013: 138.
[10] Shen Zhenmin. Based on the Visible LED Indoor Optical Communication and Optical Receiver Channel Modeling Research
[D]. Beijing: Doctorial Dissertation of Beijing Institute of Technology, 2014(in Chinese).
沈振民. 基于LED的室内可见光通信信道建模及光学接收端研究 [D]. 北京: 北京理工大学博士论文, 2014.
[11] Liu Jinglong. Research on Wireless Communication System Based on Outdoor Visible LED Traffic Light [D]. Harbin: Master’s Thesis of Harbin Engineering University, 2013: 15-23(in Chinese).
刘景龙. 基于室外可见光LED交通灯的无线通信系统研究 [D]. 哈尔滨: 哈尔滨工程大学硕士论文, 2013: 15 -23.
[12] Li Xin, Guo Xinyue, Xu Boqin. Outdoor visible light communication channel modeling [J]. Optical Communication Technology, 2016(4): 41-43(in Chinese).
李鑫, 郭心悦, 徐伯庆. 室外可见光通信信道建模 [J]. 光通信技术, 2016(4): 41-43.
[13] Kahn J M, Barry J R. Wireless Infrared Communication [J]. Proc. IEEE, 1997, 85(2): 265-298.
[14] Grubor J, Randel S, Langer K D, et al. Broadband information broadcasting using LED-based interior lighting [J]. J. Lightwave Technol., 2008, 26(24): 3883-3892.
[15] Delgado F, Quintana I, Rufo J, et al. Design and implementation of an ethernet-VLC interface for broadcast transmissions [J]. Communications Letters IEEE, 2010, 14(12): 1089-1091.
[16] Vucic J, Kottke C, Nerreter S, et al. 125 Mbit/s over 5 m wireless distance by use of OOK-modulated phosphorescent white LEDs [C]. ECOC '09. 35th European Conference on IEEE, Vienna: IEEE, 2009: 1-2.
[17] Zhong Qiduan. Analysis and Design of Optical Wireless Communication System Based on LED Traffic Lights [D]. Zhenjiang: Mater’s Thesis of University of Jiangshu, 2008: 1-24(in Chinese).
仲启端. 基于LED交通灯的无线光通信系统分析与设计 [D]. 镇江: 江苏大学硕士论文，2008: 1-24.
[18] Zhao Xin, Liu Yang. Study on the influence of road surface reflectivity on the surface temperature of pavement [J]. Technology Innovation and Application, 2013, 23(30): 211-212(in Chinese)．
赵昕, 刘洋. 路表反射率对路面表面温度影响研究 [J]. 科技创新与应用, 2013, 23 (30): 211-212．
[19] Ceng Qunzhu, Cao Meisheng, Feng Xuezhi, et al. Our country northwest several kind of ice, snow and water reflectance characteristics research [J]. Science in China, 1984, 17(4): 370-377(in Chinese).
曾群柱, 曹梅盛, 冯学智, 等. 我国西北若干种冰、雪及水体反射光谱特性的研究 [J]. 中国科学, 1984, 17(4): 370-377.