用事件间隔调制提升事件相机光通信速度，实测10米达28kbps
Event Interval Modulation: A Novel Scheme for Event-based Optical Camera Communication
- 通过事件间时间间隔编码信息，发挥事件相机异步优势
- 10米距离实现28kbps，50米达8.4kbps，创事件相机光通信新高
- 专为事件相机设计，适合高速低延迟光照通信场景
光学相机通信（OCC）是一种有前景的可见光通信技术。传统基于帧的相机系统存在速率低、处理负担重等问题。为此，采用事件视觉传感器（EVS）作为接收端的事件基OCC系统被提出，其凭借异步工作和高动态范围，可实现高速、低延迟、鲁棒通信。现有事件基OCC系统多使用开关键控（OOK）或脉冲位置调制等传统调制方式，但尚未有方法充分挖掘EVS的独特特性。本文提出一种专为事件基OCC设计的新调制方案——事件间隔调制（EIM），通过调节事件间的时间间隔来编码信息，提升传输速率。论文建立了EIM的理论模型并完成概念验证实验：首先优化EVS参数以匹配EIM的频率响应；随后实验确定了最大可用调制阶数；最后在室内环境下完成传输测试。结果表明，在10米距离下实现28 kbps通信，在50米距离下实现8.4 kbps通信，创下事件基OCC系统的新纪录。
原文摘要 · Abstract (English)
Optical camera communication (OCC) represents a promising visible light communication technology. Nonetheless, typical OCC systems utilizing frame-based cameras are encumbered by limitations, including low bit rate and high processing load. To address these issues, OCC system utilizing an event-based vision sensor (EVS) as receivers have been proposed. The EVS enables high-speed, low-latency, and robust communication due to its asynchronous operation and high dynamic range. In existing event-based OCC systems, conventional modulation schemes such as on-off keying (OOK) and pulse position modulation have been applied, however, to the best of our knowledge, no modulation method has been proposed that fully exploits the unique characteristics of the EVS. This paper proposes a novel modulation scheme, called the event interval modulation (EIM) scheme, specifically designed for event-based OCC. EIM enables improvement in transmission speed by modulating information using the intervals between events. This paper proposes a theoretical model of EIM and conducts a proof-of-concept experiment. First, the parameters of the EVS are tuned and customized to optimize the frequency response specifically for EIM. Then, the maximum modulation order usable in EIM is determined experimentally. We conduct transmission experiments based on the obtained parameters. Finally, we report successful transmission at 28 kbps over 10 meters and 8.4 kbps over 50 meters in an indoor environment. This sets a new benchmark for bit rate in event-based OCC systems.
Thank you to arXiv for use of its open access interoperability. PaperDance 不是 arXiv 官方产品；中文卡片由大模型生成，请以原文为准。