车联网可见光通信系统夜间背景光噪声模型  

Night background light noise model of visible light communication system in vehicle networking environment

作　　者：柯熙政[1,2,3] 秦欢欢 杨尚君 吴加丽 潘希雅 KE Xizheng;QIN Huanhuan;YANG Shangjun;WU Jiali;PAN Xiya(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an 710048,China;Shaanxi Civil-Military Integration Key Laboratory of Intelligence Collaborative Networks,Xi’an 710048,China;School of Physics and Telecommunications Engineering,Shaanxi University of Technology,Hanzhong 723001,China)

机构地区：[1]西安理工大学自动化与信息工程学院,西安710048 [2]陕西省智能协同网络军民共建重点实验室,西安710048 [3]陕西理工大学物理与电信工程学院,汉中723001

出　　处：《电波科学学报》2021年第6期986-990,共5页Chinese Journal of Radio Science

基　　金：陕西省科研计划项目(18JK0341);陕西省重点产业创新项目(2017ZDCXL-GY-06-01);西安市科技计划项目(2020KJRC0083)。

摘　　要：车联网可见光通信不仅受大气湍流影响,同时受交通灯、路灯、汽车前后灯和高亮度广告牌等背景光干扰,传统的光强闪烁模型不能准确描述.文中针对车联网可见光通信系统信道特性进行了分析,提出了一种采用双高斯函数叠加表示的夜间车联网可见光通信系统的背景光噪声模型,通过不同地区和不同天气下的实测数据采用该模型进行数值拟合,以验证该模型的有效性.结果表明,雨天的概率密度分布与晴天的概率密度分布没有明显的区别,且路灯光强起伏要小于其他光源产生的光强起伏.该模型对于车联网可见光信道模型建立以及噪声去除具有一定的研究意义.The visible light communication of the Internet of vehicles is not only affected by atmospheric turbulence,but also disturbed by background lights such as traffic lights,street lights,front and rear lights of vehicles and high brightness billboards.The conventional light intensity flicker model can not accurately describe the channel characteristics of the visible light communication system of the Internet of vehicles,a night background light noise model of vehicle network visible light communication system expressed by double Gaussian function superposition is proposed.Through the measured data in different regions and different weather,the model is numerically fitted to verify the effectiveness of the model.The results show that there is no obvious difference between the probability density distribution in rainy days and that in sunny days,and the intensity fluctuation of road light is less than that of other light sources.The model has certain research significance for the establishment of visible light channel model and noise removal of vehicle networking.

关 键 词：可见光通信 大气湍流 光强闪烁 背景光噪声模型 概率密度分布 

分 类 号：TN929.1[电子电信—通信与信息系统]