Visible light communication (VLC) is nowadays envisaged as a promising technology to enable new classes of services in intelligent transportation systems ranging, e.g., from assisted driving to autonomous vehicles. The assessment of the performance of VLC for automotive applications requires as a basic step a model of the transmission pattern and propagation of the VLC signal when real traffic-lights and road scenarios are involved. In this paper an experimental measurement campaign has been carried out by using a regular traffic-light as source (red light) and a photoreceiver positioned, statically, at different distances and heights along the road. A linear regression technique is used to come up with different propagation models. The proposed models have been compared, in terms of accuracy and complexity, to the conventional Lambertian model to describe the VLC channel in a real urban scenario. The proposed models provides a significant higher accuracy with comparable complexity.

如今，可见光通信（VLC）被认为是一种有前途的技术，可在智能交通系统中实现新型服务，例如从辅助驾驶到自动驾驶汽车。在涉及实际交通信号灯和道路情况时，评估VLC在汽车应用中的性能需要作为基本步骤的VLC信号传输模式和传播模型。在本文中，已经通过使用常规交通信号灯作为光源（红光）和沿道路不同距离和高度静态放置的光接收器进行了实验测量。线性回归技术用于提出不同的传播模型。在准确性和复杂性方面，对提出的模型进行了比较，用传统的Lambertian模型描述真实城市场景中的VLC频道。所提出的模型提供了相当高的精度，并且具有相当的复杂性。