【摘要】：可見光通信作為一種新興無線光通信方式具有廣泛的研究價值和應(yīng)用前景�？梢姽馔ㄐ艑⒐庾鳛樾畔⒌妮d體發(fā)送，以自由空間作為傳輸媒質(zhì)。LED具有綠色安全、發(fā)射功率大、架設(shè)簡單、無需無線電頻譜認證等優(yōu)點�？梢姽馔ㄐ诺难芯糠较蛑饕性谑覂�(nèi)可見光通信和智能交通系統(tǒng)，但是對于室外的遠距離的可見光通信的研究很少。近些年，室外遠距離可見光通信領(lǐng)域得到了更多的關(guān)注。本文提出一種遠距離可見光通信系統(tǒng)，將基帶信號調(diào)制在LED發(fā)出的可見光上，以大氣為信道傳輸，接收端使用CCD進行接收。 論文首先介紹可見光通信系統(tǒng)結(jié)構(gòu)、功能以及可見光在大氣信道中傳輸特性。在發(fā)射端，分析可見光OOK調(diào)制解調(diào)技術(shù)以及LED響應(yīng)特性，對單片機驅(qū)動光源電路和碼字生成模塊進行設(shè)計實現(xiàn)；在接收端，首先分析接收設(shè)備噪聲、信噪比，然后介紹CCD相機接收數(shù)據(jù)原理，并且完成CCD相機數(shù)據(jù)接收模塊編程設(shè)計。之后，基于發(fā)射端與和接收端的設(shè)計，給出可見光通信系統(tǒng)同步傳輸方案。最后搭建實驗平臺，測試背景光噪聲，，并且進行信息傳輸實驗。通過接收結(jié)果分析，驗證了遠距離可見光通信的可行性，達到預(yù)期目標。
[Abstract]:Visible light communication as a new wireless optical communication mode has a wide range of research value and application prospects. Visible light communication takes light as the carrier of information and uses free space as the transmission medium. Led has the advantages of green security, large transmission power, simple installation and no need for radio spectrum authentication. The research direction of visible light communication mainly focuses on indoor visible light communication and intelligent transportation system, but there is little research on long-distance visible light communication outside. In recent years, more and more attention has been paid to the field of outdoor remote visible light communication. In this paper, a long-distance visible light communication system is proposed. The baseband signal is modulated over the visible light emitted by the LED and transmitted over the atmosphere. The receiver uses CCD to receive it. Firstly, the structure and function of visible light communication system and the transmission characteristics of visible light in atmospheric channel are introduced. At the transmitting end, the visible light OOK modulation and demodulation technology and the characteristic of LED response are analyzed, and the driver light source circuit and the code word generating module are designed and realized. At the receiving end, the noise and signal-to-noise ratio of the receiving equipment are analyzed firstly, then the principle of receiving data for CCD camera is introduced, and the programming design of data receiving module for CCD camera is completed. Then, based on the design of transmitter and receiver, a synchronous transmission scheme of visible optical communication system is presented. Finally, the experiment platform is set up to test the background light noise and carry on the information transmission experiment. Through the analysis of receiving results, the feasibility of long-range visible light communication is verified, and the expected goal is achieved.
【學(xué)位授予單位】：西安電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

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