摘要
针对雾环境造成光功率衰减影响车辆间有效工作区间的问题,考虑了汽车尺寸、白光汽车前照灯的两种辐射模式,建立了空间车载可见光通信矩形信道模型,采用微元法求得漫反射链路传输功率,利用积分思想推导出雾环境下白光的衰减系数并求得系统的有效工作区间。仿真结果表明:车辆间相对速度、运动方向和车灯功率半角,路面及相邻车道车辆位置和其表面反射材料等都会带来不同程度的信道衰减,影响着车辆间信息的可靠传递。
Aiming at the problem that the attenuation of optical power caused by the foggy environment affects the effective communication area between vehicles,considering the size of the car and the two radiation modes of the white light car headlamps,a rectangular channel model of the space vehicle-mounted visible light communication is established.The differential element method is used to obtain the transmission power of the diffuse reflection link,and the integral idea is used to derive the attenuation coefficient of white light in the fog environment and obtain the effective working range of the system.The simulation results show that the power half-angle of the lamp,relative speed,direction of motion,road surface,surface reflective material and position of adjacent lane vehicles vary with degrees of channel attenuation,which affects the reliable transmission of information between vehicles.
作者
张颖
雷亚茹
黄朝军
Zhang Ying;Lei Yaru;Huang Chaojun(School of Automation and Information Engineering,Xi’an University of Technology,Xi’an,Shaanxi 710048,China;School of Physics and Telecommunications Engineering,Shaanxi University of Technology,Hanzhong,Shaanxi 723001,China)
出处
《激光与光电子学进展》
CSCD
北大核心
2021年第17期171-178,共8页
Laser & Optoelectronics Progress
基金
陕西省重点产业创新链工程(2017ZDCXL-GY-06-01)。
关键词
光通信
可见光通信
矩形模型
接收功率
工作区间
optical communications
visible light communication
rectangular model
received power
operating range
