Visible Light Communications (VLC) is becoming a mature communication technology, particularly for indoor usage. The application in outdoor environments is particularly interesting in the scope of Vehicular VLC (V-VLC), however, there are some critical challenges remaining. In general, VLC is a good complement to Radio Frequency (RF)-based communication. For automotive use cases, V-VLC is benefiting from the huge available spectrum and the readily available Light Emitting Diode (LED)based lighting systems of modern cars. Its Line Of Sight (LOS) characteristics, the directionality of the light, and the smaller collision domain substantially reduces interference. In this survey paper, we study the state of the art of V-VLC and identify open issues and challenges. We study the V-VLC communication system as a whole and also dig into the characteristics of the VLC channel. For the beginner in the field, this review acts as a guide to the most relevant literature to quickly catch up with current trends and achievements. For the expert, we identify open research questions and also introduce the V-VLC research community as a whole.

中文翻译：

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车载可见光通信：调查

可见光通信 (VLC) 正在成为一种成熟的通信技术，尤其适用于室内使用。在车载 VLC (V-VLC) 范围内，户外环境中的应用特别有趣，但是，仍然存在一些关键挑战。一般来说，VLC 是对基于射频 (RF) 的通信的一个很好的补充。对于汽车用例，V-VLC 受益于现代汽车的巨大可用光谱和现成的基于发光二极管 (LED) 的照明系统。其视线 (LOS) 特性、光的方向性和较小的碰撞域大大减少了干扰。在本调查论文中，我们研究了 V-VLC 的最新技术并确定了未解决的问题和挑战。我们从整体上研究了V-VLC 通信系统，并深入研究了VLC 信道的特性。对于该领域的初学者，这篇综述可作为最相关文献的指南，以快速赶上当前的趋势和成就。对于专家，我们确定开放的研究问题，并整体介绍 V-VLC 研究社区。