用事件相机实现多光源车联光通信，低延迟实测达标。
Real-world Latency Analysis of Vehicular Visible Light Communication with Multiple LED Transmitters and an Event-Based Camera
- 仅用正事件模式，抑制干扰同时保距离与视野。
- 支持三盏灯同时接收，实测端到端延迟满足协同感知需求。
- 适合高动态、低延迟的智能网联汽车场景应用。
事件相机具有高时间分辨率、低延迟和宽动态范围，使其成为车联网（V2X）中可见光通信（VLC）的有前景接收器。本文提出一种基于事件相机的VLC系统，解决带宽饱和、多发射机接收和延迟表征三大挑战。采用仅正事件模式，设计协议在抑制事件生成的同时保持通信距离与宽视场。提出多发射机识别方法，实证可同时接收最多三盏LED信号。最后在真实车辆场景下评估端到端延迟，结果表明系统满足协同感知要求。这些成果证明，基于事件相机的VLC是现有V2X技术（如射频）的可行补充。
原文摘要 · Abstract (English)
Event cameras offer high temporal resolution, low latency, and wide dynamic range, making them promising receivers for visible light communication (VLC) in vehicle-to-everything (V2X) applications. This work presents an event-camera-based VLC system addressing three key challenges: bandwidth saturation, multi-transmitter reception, and latency characterization. We adopt a positive-event-only mode and design a protocol that suppresses event generation while maintaining communication distance and a wide field of view. We also propose a method to identify multiple transmitters and demonstrate simultaneous reception from up to three LEDs. Finally, we evaluate end-to-end latency in real vehicular scenarios and show that the system meets cooperative perception requirements. These results demonstrate that event-camera-based VLC is a feasible complement to existing V2X technologies (e.g., RF).
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