项目名称： 基于荧光型白光LED的长距离可见光以太网实时通信系统

Long distance visible light Ethernet real-time communication system based on fluorescent white LED

申报单位： 深圳技术大学

综合介绍或申报理由：

本项目设计了基于商用荧光型白光LED光源的长距离可见光以太网通信系统，系统采用了商用的多芯片COB封装白光LED器件作为发射机光源及PIN-PD作为光检波器；为提高系统带宽，分别在收发端对信号进行了预加重和后均衡处理；为提高带宽频率利用率采用了适合于VLC的正交频分复用调制技术；该通信系统与照明系统深度结合，真正兼顾了通信质量和照明实际应用，实现了高速、远距离、宽覆盖、可实用的VLC系统。并在2020年12月20日通过深圳科创委组织的专家鉴定，专家一致认为该系统处于整体国际先进水平，在通信距离和信号覆盖范围方面具有明显优势。

This project designs a long-distance real-time Ethernet visible light communication system based on a commercial fluorescent white LED light source, which uses a commercial multi-chip COB package white LED device as the transmitter light source and a PIN-PD as the optical detector. In order to improve the bandwidth of the system, pre-emphasis and post-equalisation processes are carried out at the transceiver and transmitter respectively. The communication system is deeply integrated with the lighting system, truly taking into account the communication quality and lighting practical applications, realising a high-speed, long-distance, wide coverage and practical VLC system. The system has passed the expert appraisal organised by Shenzhen Science and Technology Commission on 20 December 2020, and the experts unanimously agreed that the system is at an overall international advanced level and has obvious advantages in terms of communication distance and signal coverage.

项目宣传视频： https://b2b.alighting.com/headline/9GNFP7WJ61/videodetail-5413.html

主要技术参数：

通信距离可达180m以上；

The communication distance can reach more than180m；

通信覆盖范围直径>7m；

The coverage range diameter of Communication’s signal >7m;

最高下行通信速率>48Mbps；

Downlink communication rate >48Mbps；

与国内外同类产品或同类技术的比较情况：

与2021年ISA全球LiFi国际会议报告最高水平相比：
1、英国的斯特拉斯克莱德大学Martin D. Dawson教授，使用专用定制的micro-LED和APD设计的VLC系统，通信速率最高达100Mbps，通信距离28.5m，未报到信号覆盖范围；
中国科技大学团队VLC系统1km公里传输速率最高仅为1Mbps ，探测器为APD，未报到信号覆盖范围；
3、我们课题组：采用使用蓝光激发黄色荧光粉的白光光源和普通的PIN-PD，由于场地原因仅进行了40米（室内）、80米（室外）和180米（室外）的实验，180米的下行数据吞吐量（传输速率）最高可达48Mbps，信号覆盖范围超过7米。
国际查新报告显示，截止至2020-12-6未见到系统结构和指标与我方系统类似的技术报告。

Compared to the highest level reported by the 2021 ISA Global Li-Fi International Conference:

1. Professor Martin D. Dawson, University of Strathclyde, UK, VLC system designed using a dedicated custom micro-LED and APD, with communication rates up to 100 Mbps and a communication range of 28.5m, with no reported signal coverage.

2. University of Science and Technology of China team VLC system 1km km transmission rate of up to 1Mbps only, detector is APD, no signal coverage reported

3. Our group: using a white light source using blue light to excite a yellow phosphor and a common PIN-PD, experiments were only carried out at 40m (indoor), 80m (outdoor) and 180m (outdoor) due to the site, with a downlink data throughput (transmission rate) of up to 48Mbps at 180m and signal coverage of over 7m.

The international search report shows that, as of 6 December 2020, no technical reports of systems with structures and indicators similar to our system have been seen.

经济评价分析：

2011年，GBI研究中心估计，预计到2015年全球用于可见光通信技术研究的投入将在1亿美金左右；2013年，Marketsand Markets发布的全球VLC/Li-Fi的市场产值到2018年将达到61亿美金；2014年，Marketsand Markets发布的最新报告中，预计到2020年可见光通信的市场规模将达到92亿美金。而《2014欧洲可见光通信组织市场调查报告》做了更为乐观的预测，其产业增长率可达84.9%，2018年产值约178亿美元，2022年年产值可达约2千亿美元。

In 2011, the GBI Research Centre estimated that the global investment in research into visible light communication technologies was expected to be around $100 million by 2015; in 2013, Marketsand Markets released a global market value for VLC/Li-Fi to reach $6.1 billion by 2018; and in 2014, Marketsand Markets released a new report in which the market for visible light communications is expected to reach $9.2 billion by 2020. And the 2014 European Visible Light Communication Organization Market Survey Report made a more optimistic forecast that its industry growth rate could reach 84.9%, with an output value of about US$17.8 billion in 2018 and an annual output value of about US$200 billion in 2022.

技术及工艺创新要点：

本项目研究与以往可见光通信系统相比具有如下的创新点：
1、提出黄光补偿技术方案，将传统方案中被认为是不可或缺的蓝光滤波器去除，将复杂的光学问题转换成较为简单的电学问题处理，获得了更简洁、性能更好、更稳定、成本更低的可见光通信系统；
2、提出多芯片封装LED光源与高压高速驱动方案，通过理论分析与实验找出最佳的芯片连接拓扑结构和工作偏置状态，并采用高压、高速驱动电路调制LED芯片组，在获得满足照明要求的均匀光场分布的同时，延长了通信距离，扩大了信号覆盖范围，确保了通信质量。

Compared with the previous visible light communication system, this project has the following innovations:

1、 Proposing a yellow light compensation technology solution that removes the blue light filter, which is considered indispensable in conventional solutions, and converts complex optical problems into simpler electrical ones to deal with, obtaining a simpler, better performing, more stable and lower cost visible light communication system.

2.The multi-chip package LED light source and high-voltage, high-speed drive scheme is proposed to find out the optimal chip connection topology and operating bias state through theoretical analysis and experiments, and the high-voltage, high-speed drive circuit is used to modulate the LED chip set, which extends the communication distance, expands the signal coverage and ensures the communication quality while obtaining a uniform light field distribution to meet the lighting requirements.

实际运用案例和用户评价意见：

分别有3家企业对我们研制的可见光通信系统进行了试用,进行了80米距离的传输现场实验。VLC系统下行发射端通过RJ45接口与互联网连接,接收端通过RJ45与笔记本电脑连接,在光斑覆盖范围内获得了良好的通信效果。用户希望该技术针对轨道交通车辆等领域的特殊要求进行改进,早日用到车厢内互联网的通信覆盖以及车厢间通信信号的连接。

Three companies have tested our visible light communication system and conducted field experiments with transmission over a distance of 80 m. The downlink transmitter of the VLC system is connected to the Internet via the RJ45 interface, and the receiver is connected to a laptop via the RJ45, with good communication results within the spot coverage. The users hope that the technology can be improved for the special requirements of rail vehicles and that it can be used soon for Internet coverage in carriages and for inter-carriage communication signals.

获奖、专利情况：

相关技术获得专利授权6项，拟写企业技术标准1项，发表文章2篇，获得了“2018年全国大学生半导体光源系统创新竞赛一等奖”、“第十五届中国研究生电子设计竞赛华南赛区一等奖”等奖项。详情见附件。

The relevant technology was granted 6 patents, drafted 1 enterprise technical standard, published 2 articles, and won the "2018 National Student Semiconductor Light Source System Innovation Competition First Prize", "The 15th China Postgraduate Electronic Design Competition South China Region First Prize " and other awards. For details, please refer to the Annex.

申报单位介绍：

深圳技术大学是广东省和深圳市高起点、高水平、高标准建设的本科层次公办普通高等学校。学校充分借鉴和引进德国、瑞士等发达国家一流技术大学先进的办学经验，致力于培养本科及以上层次具有国际视野、工匠精神和创新创业能力的高水平工程师、设计师等高素质应用型人才，努力建成一流的应用型技术大学。

Shenzhen University of Technology is a public higher education institution at the undergraduate level built at a high starting point, high level and high standard in Guangdong Province and Shenzhen. The university is committed to cultivating high-level engineers, designers and other high-quality applied talents with international vision, craftsmanship and innovation and entrepreneurship at undergraduate level and above, and strives to build a first-class applied technical university by drawing on and introducing the advanced experience of first-class technical universities in Germany, Switzerland and other developed countries.

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