資源描述:
《基于fpga的fsk調(diào)制解調(diào)設(shè)計(jì)》由會(huì)員上傳分享,免費(fèi)在線閱讀,更多相關(guān)內(nèi)容在學(xué)術(shù)論文-天天文庫(kù)。
1、摘要FPGA是現(xiàn)場(chǎng)可編程門陣列(FieldProgrammableGateArray)的簡(jiǎn)稱。它具有可編程邏輯器件現(xiàn)場(chǎng)可編程的靈活性,又有門陳列器件功能強(qiáng)、高集成度和高速度的優(yōu)點(diǎn),因此已在現(xiàn)代通信系統(tǒng)設(shè)計(jì)中被越來(lái)越廣泛的應(yīng)用。VHDL語(yǔ)言具有很強(qiáng)的電路描述和建模能力,能從多個(gè)層次對(duì)數(shù)字系統(tǒng)進(jìn)行建模和描述,從而大大簡(jiǎn)化了硬件設(shè)計(jì)任務(wù),提高了設(shè)計(jì)效率和可靠性。論文著重使用VHDL語(yǔ)言對(duì)2FSK的調(diào)制與解調(diào)進(jìn)行編程。在系統(tǒng)仿真中,用MAX+PLUSⅡ作為仿真平臺(tái),對(duì)2FSK信號(hào)進(jìn)行了調(diào)制解調(diào)的仿真。調(diào)制方面用的鍵控法,解調(diào)方面用的相干解調(diào)進(jìn)行解調(diào)。
2、基于FPGA的2FSK調(diào)制與解調(diào)在MAX+PLUSII上實(shí)現(xiàn),通過(guò)VHDL語(yǔ)言的編程,生成調(diào)制解調(diào)所需要的幾個(gè)模塊,以實(shí)現(xiàn)整個(gè)2FSK的調(diào)制解調(diào)系統(tǒng)。本論文共分四章,第一章主要是介紹了FPGA的原理以及它的應(yīng)用、發(fā)展現(xiàn)狀,另外介紹了VHDL語(yǔ)言的特點(diǎn);第二章較為詳細(xì)的講述了FSK調(diào)制和解調(diào)的原理,其中包括FSK的多種調(diào)制和解調(diào),及功率譜密度的特點(diǎn)。第三章開(kāi)始對(duì)2FSK調(diào)制解調(diào)系統(tǒng)的各個(gè)單元器件進(jìn)行設(shè)計(jì)。第四章開(kāi)頭介紹了MAX+PLUSII這款軟件,接著使用這款軟件實(shí)現(xiàn)2FSK調(diào)制解調(diào)算法,其中包括對(duì)各個(gè)功能模塊的算法編程和時(shí)序仿真。本設(shè)計(jì)的目
3、的不是為了產(chǎn)生一種優(yōu)于前人算法的算法,而是部分使用前人的算法,在前人算法中加入自己對(duì)2FSK調(diào)制解調(diào)算法的理解,從而產(chǎn)生能用于本設(shè)計(jì)的非通用算法。關(guān)鍵詞:仿真,2FSK,VHDL,F(xiàn)PGA31AbstractFPGAistheabbreviationforFieldProgrammableGateArray.Ithastheflexibilityoffieldprogrammabletotheprogrammablelogicdevices,alsohavestrongfunction,highlevelofintegrationandthe
4、advantagesofhighspeed,theseadvantagesaresamewithGateArraydevices.Therefore,ithasbeenmoreandmorewidelyusedinthemoderncommunicationsystemdesign.VHDLlanguagehasstrongabilityofcircuitdescribedandmodeling,itcanmodelanddescribedigitalsysteminmultiplelevels,simplifiedthehardwarede
5、signtask,toimprovethedesignefficiencyandreliability.ThispapermainlyusethelanguageofVHDLonprogrammingmodulationanddemodulationof2FSK.Inthesystemsimulation,usingMAX+PLUSⅡ,tosimulatemodulationanddemodulationof2FSK.Modulationusekeyingmethod,demodulationusecoherentdemodulationme
6、thod.Basedon2FSKmodulationanddemodulationofFPGArealizingonMAX+PLUSⅡ,throughtheVHDLlanguageprogramming,producingsomeblocksofmodulationanddemodulation,realizingthewhole2FSKmodulationanddemodulationsystem.Thisthesisinchapter4,Thefirstchapterismainlyintroduceshebasicprincipleof
7、FPGAanditsapplication,developmentsituation,alsointroducesthecharacteristicsofthelanguageofVHDL;thesecondchaptertellsthedetailsofFSKmodulationanddemodulationbasicprinciple,includingvariousmodulationanddemodulationmethodofFSK,andpowerspectraldensitycharacteristics.Thethirdcha
8、pterbegantodesigneachunitdevicesofthe2FSKmodulationanddemodulation.Thefourthchapte