基于RGB的三基色LED可见光通信系统的研究

发布时间：2018-03-25 09:54

本文选题：RGB-LED　切入点：可见光通信　出处：《吉林大学》2017年硕士论文

【摘要】：可见光通信(Visible Light Communication)技术由于其低功耗、高速可调制,并且可实现高速数据通信的特性,在几年之内便受到了世界各界人士的推崇和研究。可见光通信的研究局限在于可见光有限的调制带宽,研究者们已经提出了多种方案进行改进。本设计采用波分复用技术设计了一款通过RGB三基色组成三路信道进行信息传输的系统,通过三路LED驱动,将三种颜色的灯光混合为白光,使得在正常照明的同时实现第二功能——信息传输。本文首先对可见光通信的背景和研究意义做了详细介绍,列举了如今国内外可见光通信的研究现状,目前许多研究学者的研究项目主要是白光LED通信,基本上都是以荧光型白光LED为主,三基色的研究较少,本文则选择了对RGB-LED进行通信研究。经过理论研究,设计了系统整体方案,制作出了系统样机。本系统以ARM7-LPC2148为主控芯片,通过改进的OOK编码调制将三路信号与三路LED驱动电压分别进行耦合加载到RGB-LED上进行信息发送。在系统的接收端,使用四种光电探测器对光信号进行接收,然后通过选择模块对四路信号中的一路信号进行放大、滤波、整形处理,然后通过接收端的主控芯片LPC2148进行解调解码,将数据送到液晶屏OLCD12864上进行显示。系统样机完成后,对系统进行了测试,该系统的通信速率为8.4KHz,此系统的最佳通信状态为传输距离为1.5cm,光强为33701μx。
[Abstract]:Visible light communication (Visible Light Communication) technology due to its low power consumption, high speed modulation, and can realize the characteristics of high-speed data communication, in a few years it has been the world from all walks of life and respected research. Limitations of visible light communication is visible light modulation bandwidth is limited, researchers have proposed a variety of solutions to improve this design using WDM technology to design a system for information transmission through the RGB three color composition of the three channel, driven by three LED, the three color light mixed into white light, to achieve second functions: information transmission in normal lighting at the same time. This paper made a detailed introduction on the background of visible light communication and research significance, are now at home and abroad for visible light communication, research status, current research project many scholars mainly white LED communication base This was all to fluorescent white light LED, three primary research less, we choose the communication study of RGB-LED. Through theoretical research, the overall design scheme of the system, making the prototype system. The system uses ARM7-LPC2148 as the main control chip, through improved OOK code modulation signal and the three road three LED drive voltage are coupled respectively loaded into RGB-LED send information. At the receiving end of the system, using the four photodetector receives the optical signal, and then through the selection module of four signals in a signal amplification, filtering, shaping processing, and then through the main control chip LPC2148 demodulation receiver decoding, the data is sent to the OLCD12864 display on the LCD screen. The system prototype is completed, the system was tested. The communication speed of the system is 8.4KHz, the best communication state of this system for transmission distance It is 1.5cm, and the light intensity is 33701 u X.

【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN929.1

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