论文标题
智能运输系统的超低潜伏期可见光通信系统的光学表征
Optical Characterization of Ultra-Low latency Visible Light Communication System for Intelligent Transportation Systems
论文作者
论文摘要
本文报告了使用真实的交通信号灯对智能运输系统（ITS）协议的超低潜伏期，基础架构到车辆（I2V）通信的真实交通信号灯，对可见光通信系统（VLC）系统的光学性能（VLC）系统进行了详细的实验表征。尽管实施了长期以来寻求其协议的实施，但仍需详细介绍光学阶段的特征如何影响VLC系统在现实配置中的整体性能，但目前很少解决此类表征。我们在现实的配置中进行了一项实验研究，该配置启用了VLC传输的常规交通信号灯（TX）将数字信息发送到接收阶段（RX），该信息由光学冷凝器和专用放大的光电二极管阶段组成。在有效的视野（EFOV）和数据包错误率（PER）方面，我们进行了涵盖了一系列光学冷凝器的VLC性能的详细测量活动，并为3-50 m的TX -RX距离进行了详细的测量活动。结果表明，不同镜头集的几种非平地行为是测量网格上位置的函数，突出了关键方面，并根据特定的应用程序和所需的EFOV确定了最合适的光学配置。在本文中，我们还为信号强度和EFOV提供了一个理论模型，这是多个参数的函数，例如距离，rx方向和特定冷凝器的焦距。在不久的将来，我们的结果可能非常相关，以评估针对实际应用的VLC系统时最适合的解决方案，在这种应用程序中，在此，在此，在此，在此，在此中，与角度有关的未对准效应起着不可忽略的作用，我们认为与此处提到的Pristine I2V情况有关。
This paper reports a detailed experimental characterization of optical performances of Visible Light Communication (VLC) system using a real traffic light for ultra-low latency, infrastructure-to-vehicle (I2V) communications for intelligent transportation systems (ITS) protocols. Despite the implementation of long sought ITS protocols poses the crucial need to detail how the features of optical stages influence the overall performances of a VLC system in realistic configurations, such characterization has rarely been addressed at present. We carried out an experimental investigation in a realistic configuration where a regular traffic light (TX), enabled for VLC transmission, sends digital information towards a receiving stage (RX), composed by an optical condenser and a dedicated amplified photodiode stage. We performed a detailed measurements campaign of VLC performances encompassing a broad set of optical condensers, and for TX-RX distances in the range 3 - 50 m, in terms of both effective field of view (EFOV) and packet error rate (PER). The results show several nontrivial behaviors for different lens sets as a function of position on the measurement grid, highlighting critical aspects as well as identifying most suitable optical configurations depending on the specific application and on the required EFOV. In this paper we also provide a theoretical model for both the signal intensity and the EFOV as a function of several parameters, such as distance, RX orientation and focal length of the specific condenser. Our results could be very relevant in the near future to assess a most suited solution in terms of acceptance angle when designing a VLC system for real applications, where angle-dependent misalignment effects play a non-negligible role, and we argue that it could have more general implications with respect to the pristine I2V case mentioned here.
