基于大功率白光led的可見(jiàn)光雙路通信系統(tǒng)設(shè)計(jì)方案畢業(yè)設(shè)計(jì)(已修改)
2024-09-12 14:36 本頁(yè)面
【正文】 . I 畢業(yè)設(shè)計(jì) . II 摘 要 提出一種基于大功率白光 LED 的可見(jiàn)光雙路通信系統(tǒng)設(shè)計(jì)方案，詳細(xì)給出了該設(shè)計(jì)方案可見(jiàn)光發(fā)射端與接收端 A、 B 兩路系統(tǒng)設(shè)計(jì)的原理與組成。發(fā)射端 A 路傳輸語(yǔ)音信號(hào)， B 路傳輸高頻信號(hào)。發(fā)射端 A 路采用基帶傳輸，發(fā)射端 B 路采用調(diào)制傳輸，同時(shí)通過(guò)白光 LED 發(fā)送；接收端 A 路通過(guò)帶通濾波器電路、放大電路， B 路通過(guò)高通濾波器電路、解調(diào)電路、放大電路，分別將信號(hào)傳遞給喇叭，從而分別還原出 A、 B 路信號(hào)，如此實(shí)現(xiàn)了可見(jiàn)光雙路通信。測(cè)試結(jié)果表明該系統(tǒng)具有通信距離遠(yuǎn)、可靠性高及穩(wěn)定性好等優(yōu)點(diǎn)。 關(guān)鍵詞 ： 白光 LED，可見(jiàn)光通信，調(diào)制解調(diào) . III Abstract A visible light munication system with two channels is proposed in this paper. The principle and position of the system is described in detail. The system is divided into two parts, namely transmitting and receiving subsystems. High power white LED is used as the transmission medium, with the function of signal transmission. The voice signal can be transmitted from the transmission subsystem in two channels, correspondingly received at the receiving subsystem with two channels. It can realize munication requirement and experimental results of the proposed system performs better with further munication range, more robust and stable pared with other similar single channel munication methods. Keywords: White LED, Visible light munication system, Modulation and demodulation . IV 目 錄 前 言 ........................................................................................................................................ 1 1 緒論 ................................................................................................................................ 2 課題研究的背景及意義 ............................................................................................. 2 白光 LED 通信系統(tǒng)性 能的相關(guān)技術(shù) ........................................................................ 2 陣列光源的布局設(shè)計(jì) ...................................................................................... 2 驅(qū)動(dòng)電路優(yōu)化設(shè)計(jì) .......................................................................................... 3 均衡技術(shù) .......................................................................................................... 4 正交頻分復(fù)用技術(shù) .......................................................................................... 4 信道編碼技術(shù) .................................................................................................. 4 分集接收技術(shù) .................................................................................................. 5 自適應(yīng)傳輸技術(shù) .............................................................................................. 6 白光 LED 通信的展望 ............................................................................................... 6 2 系統(tǒng)方案 ........................................................................................................................ 8 電源方案選擇與論證 ................................................................................................. 8 LED 驅(qū)動(dòng)電路方案的選擇與論證 ............................................................................. 9 3 理論分析與計(jì)算 .......................................................................................................... 11 電路結(jié)構(gòu)分析 ........................................................................................................... 11 電路參數(shù)分析 ........................................................................................................... 11 555 方波發(fā)生器參數(shù)分析 .............................................................................. 11 調(diào)制解調(diào)電路參數(shù)分析 ................................................................................ 12 大功率 LED 驅(qū)動(dòng)電路參數(shù)分析 .................................................................. 12 帶通濾波電路參數(shù)分析 ................................................................................ 13 放大電路參數(shù)分析 ........................................................................................ 13 元器件的選擇 ........................................................................................................... 14 4 電路設(shè)計(jì) ...................................................................................................................... 16 系統(tǒng)總體框圖 ........................................................................................................... 16 發(fā)送端電路設(shè)計(jì) ....................................................................................................... 16 . V A 路電路設(shè)計(jì) .................................
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