基于白光LED的可见光通信系统研究
摘要可见光通信技术是一种新兴的无线光通信技术，随着白光LED的发明及应用，可见光通信技术得到了良好的发展。白光LED不仅可以提供室内照明，而且可以应用到无线光通信系统中满足室内个人网络需求。论文主要对基于白光LED的室内可见光通信系统进行了研究。64817
论文首先对光源进行了分析，选择了白光LED作为系统光源；然后，简单介绍了白光LED照明光源通信系统的组成结构，给出了一种求LED照明灯室内布局的方法，仿真结果表明，该方法可以较好地解决可见光通信系统的室内LED照明灯的最优布局问题。本文引入了一种基于正交频分复用(OFDM)调制与解调的方案，用于减弱高速通信时由多径效应带来的码间串扰。整个系统采用直射式链路形式和光强度调制——直接检测技术，可以实现对白光LED的高速调制，并设计出了用于接收可见光信号和信号解调的光接收电路，完成了白光LED的可见光通信收发系统，并对其中的主要电路进行了仿真，仿真结果表明电路是可行的。
毕业论文关键词 室内可见光通信 光无线通信 白光LED 光发射电路 光接收电路
毕业设计说明书（论文）外文摘要
Title The visible light communication system based on white LED
Abstract Visible light communication technology is one kind of emerging wireless optical communication technology, with the invention and application of white LED, visible light communication technology obtained the good development. White LED can provide indoor lighting not only, and can be applied to meet the demand of indoor personal networks in wireless optical communication system. Thesis mainly based on visible white LED indoor optical communication system is studied.
Paper first analyses the light source, choose the white LED light source as a system; Then, introduces the composition of white LED lighting source communication system structure, and gives a LED light indoor layout method, the simulation results show that the method can well solve the visible light communication system of indoor LED light of the optimal layout problem. This paper introduces a kind of based on orthogonal frequency pision multiplexing (OFDM) modulation and demodulation scheme, used in the highway communication inter symbol interference caused by multipath effect. The whole system adopt the direct link form and light intensity modulation direct detection technology, can realize high speed modulation of white LED, and used to receive optical signals are designed optical receiving circuit and signal demodulation, completed the white LED visible light communication transceiver system, and the main circuit are simulated, the simulation results show that the circuit is feasible.
Keywords indoor visible light optical, wireless communication white LED light, optical emitting circuit, optical receiving circuit
目 次
1 绪论 1
1．1 研究背景与意义 1
1．3 论文主要内容 3
2 可见光通信系统简介 4
2．1 可见光通信的工作原理 4
2．2 可见光通信系统的基本构成框图 4
2．3 可见光通信的关键技术 5
2．4 无线通信和有线通信的比较 6
3 可见光通信系统各部分组成的研究 6
3．1 光源的选择