接近6 Gbps的实时基于激光的白色可见光通信,通过飞行员辅助的时钟同步实现
Optics letters
|July 1, 2025
概括
这项研究展示了一种高速白色可见光通信 (VLC) 系统,使用方格振幅调制-直角频率分割多重复合 (QAM-OFDM) 和一种新的时钟同步方案. 该系统在10米处实现了创纪录的6 Gbps数据速率,推进了6G无线网络.
科学领域:
- 光电学是指光电子产品.
- 无线通信无线通信
- 信号处理 信号处理
背景情况:
- 可见光通信 (VLC) 集成了照明和数据传输,将其定位为未来超越5G/6G无线网络的关键技术.
- 现有的VLC系统因收发器之间的频率偏移而面临传输错误的挑战.
研究的目的:
- 为了演示一个高速的,实时光激光基于白色VLC系统.
- 提出并验证一种新的飞行员辅助时钟同步 (PCSN) 方案,以减轻传输错误.
- 为了实现实时白色VLC系统的创纪录的数据速率.
主要方法:
- 开发一个微型演示板 (10x10厘米) 集成光激光基于白色VLC系统.
- 在现场可编程门阵列 (FPGA) 上实施方程振幅调制-直角频率分割多重复合 (QAM-OFDM).
- 建议和应用一个试点辅助时钟同步 (PCSN) 方案,使用近似的平均值进行频率偏移补偿.
主要成果:
- 实时VLC链接实现了4.69Gbps在1.5m,4.55Gbps在10m和4Gbps在19.6m的16QAM-OFDM和PCSN方案,所有这些都低于前向错误纠正 (FEC) 极限.
- 一个比特加载方案将数据速率提高到10m的6 Gbps,比固定16QAM提高了约31.87%.
- 展示的系统实现了实时白色VLC系统中报告的最高数据速率.
结论:
- 拟议的基于光激光的白色VLC系统与PCSN为高速无线通信提供了可行的解决方案.
- 该系统能够在相当长的距离上实现高数据速率,使其成为下一代无线网络的强大候选人.
- 集成先进的调制和同步技术推动了VLC性能的边界.
相关概念视频
Pilot and Numeric Relaying
135
Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
135
Light Acquisition
8.6K
In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.
8.6K
Electronic Distance Measuring Instruments
125
Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...
125


