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1、Q260046902專業(yè)做論文IV基于FPGA的ASK載波傳輸系統(tǒng)設(shè)計(jì)摘要:現(xiàn)代通信系統(tǒng)的發(fā)展隨著VHDL等設(shè)計(jì)語(yǔ)言的出現(xiàn)和ASIC的應(yīng)用進(jìn)入了一個(gè)新的階段,普通的傳輸系統(tǒng)設(shè)計(jì)方法已經(jīng)不能滿足使用需求。由于大多數(shù)信號(hào)都是帶通型的,所以必須先用數(shù)字基帶信號(hào)對(duì)載波進(jìn)行調(diào)節(jié),形成數(shù)字調(diào)制信號(hào)再進(jìn)行傳輸。因而,調(diào)制技術(shù)是實(shí)現(xiàn)現(xiàn)代通信的重要手段。本文在研究ASK傳輸系統(tǒng)的基礎(chǔ)上,基于FPGA設(shè)計(jì)了它的調(diào)制解調(diào)仿真實(shí)現(xiàn)方案。首先確定了ASK傳輸系統(tǒng)的仿真方案。其次編寫了方案所需的程序,包括基帶信號(hào)的產(chǎn)生,調(diào)制及解調(diào)實(shí)
2、現(xiàn)功能。最后,對(duì)整個(gè)系統(tǒng)進(jìn)行仿真,對(duì)結(jié)果中的錯(cuò)誤進(jìn)行分析并改進(jìn)方案。結(jié)果表明用FPGA控制ASK傳輸系統(tǒng)的實(shí)現(xiàn)方法簡(jiǎn)單,誤碼率低。提高了數(shù)字通信系統(tǒng)的效率,降低了成本。關(guān)鍵詞:ASK技術(shù);調(diào)制;解調(diào);誤碼Q260046902專業(yè)做論文IVThedesignofASKcarriertransmissionsystembasedonFPGAAbstract:ThedevelopmentofmodernCommunicationsystementersonanewstagealongwiththeappeara
3、nceofVHDLandimplementofASIC.Themethodofordinarytransmissionsystemdesignalreadycouldnotmeettheoperationrequirements.Becausemostoftherealsignalarebandpasssignal,itisnecessarytousebasebandsignaltomodulatecarrierwaveandgeneratedigitalmodulationsignaltobetrans
4、ferred,thusthetechnologyofthemodulationanddemodulationistheimportantmethodsofthemoderncommunication.BasedonthestudyofASKcarriertransmissionsystem,thesimulationonASKmodulationanddemodulationhasbeendesignedbasedonFPGA.Firstly,thedesignofsimulationonASKcarri
5、ertransmissionsystemwaschosen.Secondly,therequiredprocedurehascompiled,includingbasebandsignalproducing,functionofmodulationanddemodulationrealizing.Finally,thesimulationontheoverallsystemwasconducted.Then,theresultmistakewasanalyzedandthedesignwasimprove
6、d.Theresultindicatesthemethodofdemodulation,whichcontroltheoutputofASKbyFPGA,issimple.Theerrorcoderateislow.Theefficiencyisimproved.Theefficiencyofdigitalcommunicationsystemisadvancedandthecostislowered.Keywords:Amplitude-shiftkeyingtechnology,Modulation,
7、Demodulation,ErrorcodeQ260046902專業(yè)做論文IV目錄第1章緒論11.1課題背景11.2課題目的和意義21.3論文內(nèi)容安排3第2章方案的設(shè)計(jì)42.1方案涉及的技術(shù)42.1.1通信系統(tǒng)的調(diào)制解調(diào)技術(shù)42.1.2ASK調(diào)制解調(diào)技術(shù)82.2整體方案設(shè)計(jì)132.3本章小結(jié)14第3章ASK調(diào)制系統(tǒng)軟件仿真153.1調(diào)制系統(tǒng)仿真建模153.2調(diào)制程序153.3ASK調(diào)制系統(tǒng)仿真173.4仿真結(jié)果調(diào)試183.5本章小結(jié)20第4章ASK解調(diào)系統(tǒng)軟件仿真214.1解調(diào)系統(tǒng)仿真建模214.2解調(diào)程
8、序214.3ASK解調(diào)系統(tǒng)仿真224.4仿真結(jié)果調(diào)試234.5本章小結(jié)25第5章ASK調(diào)制與解調(diào)系統(tǒng)綜合仿真265.1基帶信號(hào)的輸入265.1.1m序列簡(jiǎn)介265.1.2m序列的實(shí)現(xiàn)275.2綜合仿真29Q260046902專業(yè)做論文IV5.3仿真結(jié)果調(diào)試305.4本章小結(jié)33結(jié)論34致謝35參考文獻(xiàn)36附錄:源程序37西南科技大學(xué)本科生畢業(yè)論文第1章緒論1.1課題背景現(xiàn)代通信系統(tǒng)是時(shí)代生命線?,F(xiàn)代通信已經(jīng)不再是單一的電話網(wǎng)或