電力線載波調(diào)制解調(diào)器畢業(yè)設(shè)計(jì)論文

電子機(jī)電論文編號(hào):JD114    字?jǐn)?shù):18247,頁數(shù):49

目  錄
第1章  緒  論........................................................ 1
1.1  課題背景 ....................................................... 1
1.1.1  電力線通信概述 ............................................... 1
1.1.2  電力線通信在國內(nèi)外的應(yīng)用研究現(xiàn)狀...............................1
1.1.3  電力線通信前景展望............................................ 2
1.2  論文內(nèi)容及主要工作...............................................3
1.3  論文結(jié)構(gòu)安排 ................................................. ..4
第2章  電力線信道分析及調(diào)制解調(diào)器方案設(shè)計(jì)............................ 5
2.1  電力線信道噪聲分析.............................................. 5
2.2  電力線信道衰減分析 ..............................................6
2.3  系統(tǒng)方案的論證設(shè)計(jì) ..............................................7
2.3.1  電力線信道結(jié)果分析 ............................................7
2.3.2  調(diào)制方式的選擇 ............................................... 8
2.3.3實(shí)現(xiàn)調(diào)制的方案選擇...............................................9
第3章  電力線調(diào)制解調(diào)電路設(shè)計(jì) ........................................13
3.1  FSK介紹 ........................................................ 13
3.2  FSK調(diào)制電力線通信系統(tǒng)性能分析 ...................................15
3.2.1  電力線通信系統(tǒng)模型............................................ 15
3.2.2  FSK調(diào)制電力線通信系統(tǒng)性能分析 .................................19
3.3  調(diào)制解調(diào)器電路設(shè)計(jì) ............................................. 21
3.3.1  調(diào)制解調(diào)器核心器件AM7910介紹 ..................................21
3.3.2  Modem的工作機(jī)理 ...............................................22
3.3.3  由AM7910為主體組成1200 bit／s的Modem...........................23
3.4 耦合電路設(shè)計(jì) .....................................................24
3.5  調(diào)制解調(diào)器的串口電路設(shè)計(jì) ........................................25
3.5.1  使用串口通信的原因 ............................................25
3.5.2  RS-232的電器特性 ..............................................26
3.5.3  調(diào)制解調(diào)器的串行接口電路的設(shè)計(jì)實(shí)現(xiàn) ............................27
3.6  電源模塊電路設(shè)計(jì) ................................................27
3.7  晶體振蕩器電路設(shè)計(jì) ..............................................28
3.8  控制電路設(shè)計(jì) ....................................................29
第4章  調(diào)試報(bào)告 ......................................................31
4.1  調(diào)試步驟 ........................................................31
4.2  PCB設(shè)計(jì)缺陷 .....................................................32
4.3  測(cè)試結(jié)果 ........................................................33
4.3.1  測(cè)試晶體波形 ..................................................33
4.3.2  AM7910的各點(diǎn)電位測(cè)試結(jié)果 ......................................35
4.3.3  功能測(cè)試結(jié)果 ................................................. 35
4.4  調(diào)試中出現(xiàn)的異�，F(xiàn)象及分析 ......................................36
4.5  調(diào)試結(jié)論和設(shè)計(jì)優(yōu)化 ..............................................37
總  結(jié) .............................................................. 39
致  謝 ...............................................................40
參考文獻(xiàn) ............................................................ 41
附錄1  Modem設(shè)計(jì)原理圖 ...............................................42
附錄2  Modem設(shè)計(jì)PCB圖 ................................................43
附錄3  Modem設(shè)計(jì)實(shí)物圖 ...............................................44

摘   要

     電力線網(wǎng)絡(luò)的特點(diǎn)是它覆蓋的范圍非常廣，各種建筑物內(nèi)都有接入。與常見的 Internet不同，電力線通信（Power-line communication）由于通信線路的特點(diǎn)，是一種近距離的通信方式，它適合“最后一英里”（last mile）的通信接入。而調(diào)制解調(diào)技術(shù)決定了電力線通信的傳輸速率、傳輸距離和抗干擾能力，它是電力線通信實(shí)現(xiàn)的關(guān)鍵。
本次設(shè)計(jì)主要涉及電力線載波調(diào)制解調(diào)器的相關(guān)內(nèi)容，本文通過對(duì)電力線信道的初步分析，提出了適合電力線通信的具體實(shí)現(xiàn)方案。文章詳細(xì)介紹了基于FSK調(diào)制方式的電力線載波調(diào)制解調(diào)器的硬件設(shè)計(jì)，設(shè)計(jì)內(nèi)容包括電力線耦合接口的設(shè)計(jì)、調(diào)制解調(diào)器的設(shè)計(jì)和控制器的相關(guān)設(shè)計(jì)等。
通過分析和調(diào)試，設(shè)計(jì)實(shí)現(xiàn)了電力線調(diào)制解調(diào)器（Modem）的相關(guān)功能，各項(xiàng)技術(shù)指標(biāo)也達(dá)到最初設(shè)計(jì)任務(wù)要求。

關(guān)鍵詞：電力線通信；FSK；調(diào)制；解調(diào)；Modem

The Design of Power Line Carrier Modulator and Demodulator
Abstract: The greatest advantage of the power-line network is that it covers a very wide range. Various buildings have power lines access. Different from the common Internet,because of its communication character, the PLC (Power-line communication)is a short-distance correspondence, it suits to the “l(fā)ast mile” communications access. The technology of modulation and demodulation have an effect on the PLC’s transmission speeds, transmission distance and anti-jamming capabilities, The technique is the key to realize Power-line communication.
The design mainly concerns on the content of power line carrier modulator and demodulator, the paper through primarily analyzing the power line channel, puts forward the specific implement proposal which suits to the power-line communication. The article introduces the hardware design of power line carrier modulator and demodulator in detail which is based on FSK modulator mode, the design content including the design of  power-line coupling interface ,modem and the controller. 
     Through analyzing and debugging, the design realizes the related function of power-line Modem, Various technical indicators have reached the initial design tasks .

Keywords: Power-line communication（PLC），F(xiàn)requency Shift Keying (FSK)，Modulation，Demodulation,  Modem