当前位置: X-MOL 学术J. Lightw. Technol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Impact of Vehicle Headlights Radiation Pattern on Dynamic Vehicular VLC Channel
Journal of Lightwave Technology ( IF 4.7 ) Pub Date : 2021-03-09 , DOI: 10.1109/jlt.2021.3064811
Farah Mahdi Alsalami , Nurudeen Aigoro , Abdulrahman A. Mahmoud , Zahir Ahmad , Paul Anthony Haigh , Olivier C.L. Haas , Sujan Rajbhandari

This article develops a statistical large-scale fading (path loss) model of a dynamic vehicular visible light communication (VVLC) system. The proposed model combines the impact of inter-vehicle spacing and the radiation intensity distribution as a function of the irradiance angle which changes with the traffic conditions. Three models (Lambertian, Gaussian, and empirical) are utilized to examine the impact of vehicles headlights radiation pattern on the statistical path loss of VVLC system. The analytical model of channel path loss is validated by Monte Carlo simulation with the headlight model simulated with a raytracing software. The path loss values of the Gaussian model differ by 2 dB compared to the Lambertian model, irrespective of the traffic conditions while it differs by 24.6 dB during late night and 8.15 dB during rush hours compared to the empirical model of a Toyota Altis headlight. This variation shows that the radiation intensity distribution should be modelled for each vehicle's headlights from each manufacturer to ensure accurate VVLC channel model. The proposed Gaussian model provides a close approximation to describe such radiation pattern and can easily be adapted to model for different manufacturers’ headlights.

中文翻译:

车辆前照灯辐射方向图对动态VLC通道的影响

本文开发了动态的车载可见光通信(VVLC)系统的统计大规模衰落(路径损耗)模型。所提出的模型结合了车辆间距和辐射强度分布的影响,该强度是辐照角度的函数,辐照角度随交通条件而变化。利用三种模型(朗伯,高斯和经验模型)来检查车辆前灯辐射图对VVLC系统的统计路径损耗的影响。通道路径损耗的分析模型通过蒙特卡洛模拟和光线追踪软件模拟的前照灯模型进行验证。与朗伯模型相比,高斯模型的路径损耗值与Lambertian模型相差2 dB,而深夜和8时的路径损耗值相差24.6 dB。与丰田Altis大灯的经验模型相比,高峰时段的噪音为15 dB。这种变化表明,应该为来自每个制造商的每辆车的前照灯建模辐射强度分布,以确保准确的VVLC通道模型。提出的高斯模型提供了一种近似的近似值来描述这种辐射图,并且可以轻松地针对不同制造商的前照灯进行建模。
更新日期:2021-05-11
down
wechat
bug