VLC-OFDM可见光通信的调制技术的研究

摘要可见光通信技术是一种新兴的无线光通信技术，由于人们对于无线通信的需求增加，以及LED技术的迅速发展，可见光通信技术拥有了广阔的发展前景。LED是一种新型的照明设备，与传统光源相比，LED具有体积小、重量轻、寿命长、亮度高、能效高等诸多优点。同时，LED具有很高的调制带宽和响应度，我们可以设计出基于LED的可见光通信系统。
   本论文主要是围绕可见光通信的调制技术来展开研究的。论文首先对白光LED工作原理及特性进行了阐述。其次，简要介绍了可见光通信系统的组成及特点,分析了可见光通信中发射端到接收端的链路模型。然后，本文主要研究了应用于可见光通信的调制方法，包括：开关键控调制、脉冲位置调制、脉冲间隔调制以及正交频分复用调制。本文重点研究了正交频分复用，给出了实现可见光通信调制解调的方案，并利用System View进行了仿真。论文分析了VLC-OFDM仿真系统的误码率特性曲线，所建立的VLC-OFDM调制模型不仅成功实现了调制解调的功能，准确恢复出信息,并且它还具有一定的抗多径衰落能力。26949
毕业论文关键词可见光通信   LED   调制   正交频分复用   仿真
外文摘要
Title   Study on Modulation Method for Visible Light communication System
Abstract
Visible light communication technology is an emerging wireless optical communication technology. Due to the increasing demand of the wireless communication and the rapid development of the LED technology, the visible light communication has extensive prospects. LED is a new illuminance source. Compared with traditional illuminance sources, LED presents many advantages such as small size, reduced weight, long life, high brightness, steadily improved power efficiency and etc. At the same time, LED has a high modulation bandwidth and responsivity. We can design a visible light communication system based on LED.
We begin our study of the modulation for visible light communication. Firstly, this paper expounds the white LEDs working principle and characteristics. Secondly, there is a brief introduction of the composition and characteristics of the VLC. We analysis the link model from the transmitter to the receiver. Then we mainly research the modulation methods used in visible light communication，including：OOK, PPM, DPIM and OFDM.OFDM are the main part of the article. We design some schemes for realization of visible light communication modulation. And we use the system view to simulate the scheme. The VLC-OFDM modulation model not only succeeds in realizing its modulation and demodulation functions, but also has some anti-multipath fading capability.
Keywords Visible light communication，LED，Modulation,OFDM,Simulation
目   录
第一章绪论1
1.1可见光通信研究背景及意义1
1.2可见光通信与红外通信的比较1
1.3可见光通信与射频通信的比较1
1.4国内外研究现状2
1.5本论文研究内容2
第二章白光LED的结构与特性 4
2.1LED的结构及发光原理 4
2.2 LED的物理特性 4
2.3本章小结7
第三章可见光通信系统8
3.1可见光通信系统简介8
3.2可见光通信系统链路分析8
3.3本章小结9
第四章可见光通信调制技术 10
4.1开关键控调制（OOK）10
4.2脉冲位置调制（PPM）11
4.3脉冲间隔调制（DPIM）12
4.4 三种调制方式的比较12
4.5 本章小结14
第五章基于正交频分复用（OFDM）的可见光通信系统15
5.1正交频分复用技术的介绍 15
5.2 OFDM调制方式的优缺点15
5.3基于OFDM的可见光通信系统16
5.4基于OFDM的VLC系统仿真17 VLC-OFDM可见光通信的调制技术的研究:http://www.751com.cn/tongxin/lunwen_21262.html