【摘要】：可見光通信(VLC)是基于第四代環(huán)保節(jié)能照明光源LED而新興的一種新型的通信方式。它將載波頻率上調(diào)到了無線電波中的可見光頻段,能極好的解決無線射頻通信頻譜資源問題。同時,可見光通信可以廣泛用于對電磁波敏感的場合,如飛機(jī)、醫(yī)院等。另一方面,可見光通信作為一種新的通信方式,可以與傳統(tǒng)射頻通信兼容,豐富和增強(qiáng)無線通信接入的方式及效果。現(xiàn)階段可見光通信已經(jīng)成為通信領(lǐng)域的研究熱點,其應(yīng)用具有廣闊的發(fā)展前景。 本文針對適用于室內(nèi)的可見光通信系統(tǒng)進(jìn)行深入研究。論文首先對白光LED和光電檢測(PD)二極管的工作原理及特性進(jìn)行了闡述,并針對這些特性對可·見光通信系統(tǒng)的性能影響進(jìn)行了分析；其次,基于室內(nèi)可見光點對點直射視距(LOS)通信模型,研究了室內(nèi)信道環(huán)境下可見光通信系統(tǒng)信道特性,分析了室內(nèi)可見光通信鏈路構(gòu)成結(jié)構(gòu),詳細(xì)闡述了系統(tǒng)各個組成部分所需實現(xiàn)的功能。在此基礎(chǔ)上,本文重點研究了適用于室內(nèi)應(yīng)用的可見光通信系統(tǒng)的設(shè)計與實現(xiàn)方案,提出了一種基于單片機(jī)為控制核心、采用IM/DD檢測技術(shù)的室內(nèi)可見光通信系統(tǒng)。系統(tǒng)設(shè)計包括了硬件電路設(shè)計方面的LED驅(qū)動電路、信號調(diào)制電路,PIN前置放大電路、濾波電路等；嵌入式軟件編程方面的PPM調(diào)制解調(diào)技術(shù)算法實現(xiàn)、CRC校驗技術(shù)的實現(xiàn)等。論文研究搭建了室內(nèi)可見光通信系統(tǒng)實驗平臺,完成了室內(nèi)環(huán)境下的文本信息傳輸,并且對設(shè)計搭建的實驗系統(tǒng)平臺完成了相應(yīng)的通信性能的測試,針對距離、角度、背景光等信道參數(shù)對系統(tǒng)通信性能影響的實驗結(jié)果進(jìn)行了分析,獲得了對室內(nèi)VLC原理及系統(tǒng)性能的深入理解。系統(tǒng)測試驗證了設(shè)計方案的可行性及有效性。 論文研究工作為進(jìn)一步進(jìn)行可見光通信應(yīng)用的研究提供了具體的理論依據(jù)和實驗基礎(chǔ)。
[Abstract]:Visible light communication (VLC) is a new communication method based on the fourth generation environmental protection and energy saving lighting source LED. It upregulated the carrier frequency to the visible light band in the radio wave, which can solve the problem of radio frequency spectrum resource. At the same time, visible light communication can be widely used for electromagnetic wave sensitive occasions, such as aircraft, hospitals and so on. On the other hand, as a new communication mode, visible light communication can be compatible with the traditional radio frequency communication, enrich and enhance the way and effect of wireless communication access. At present, visible light communication has become a research hotspot in the field of communication, and its application has broad development prospects. In this paper, we study the visible light communication system which is suitable for indoor. Firstly, the working principle and characteristics of white LED and (PD) diode are described, and the influence of these characteristics on the performance of visible optical communication system is analyzed. Secondly, based on the indoor visible point-to-point direct line-of-sight (LOS) communication model, the channel characteristics of the indoor visible light communication system are studied, and the structure of the indoor visible light communication link is analyzed. The functions of each component of the system are described in detail. On this basis, this paper focuses on the design and implementation of visible light communication system, which is suitable for indoor application, and puts forward a kind of indoor visible light communication system based on single chip microcomputer and IM/DD detection technology. The system design includes the LED drive circuit, signal modulation circuit, PIN preamplifier circuit, filter circuit and so on, the realization of PPM modulation and demodulation technology in embedded software programming, the realization of CRC check technology and so on. The thesis studies and builds the indoor visible light communication system experiment platform, completes the text information transmission under the indoor environment, and completes the corresponding communication performance test to the designed experimental system platform, aiming at the distance and the angle. The experimental results of the influence of the background light and other channel parameters on the communication performance of the system are analyzed, and an in-depth understanding of the indoor VLC principle and the performance of the system is obtained. The system test verifies the feasibility and effectiveness of the design. The research work in this paper provides a theoretical and experimental basis for further research on the application of visible light communication.
【學(xué)位授予單位】：大連海事大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TN929.1

【參考文獻(xiàn)】

相關(guān)期刊論文 前3條

1 丁德強(qiáng);柯熙政;;可見光通信及其關(guān)鍵技術(shù)研究[J];半導(dǎo)體光電;2006年02期

2 胡國永;陳長纓;陳振強(qiáng);;白光LED照明光源用作室內(nèi)無線通信研究[J];光通信技術(shù);2006年07期

3 甘彬,馮紅年,金尚忠;大功率白色發(fā)光二極管的特性研究[J];光學(xué)儀器;2005年05期

相關(guān)博士學(xué)位論文 前3條

1 譚家杰;室內(nèi)LED可見光MIMO通信研究[D];華中科技大學(xué);2011年

2 劉木清;照明用LED光效的熱特性及其測試與評價方法的研究[D];復(fù)旦大學(xué);2009年

3 李廣環(huán);白光LED用熒光粉的制備與性能研究[D];吉林大學(xué);2012年

，

本文編號：2331142