文档介绍：成都理工大学硕士学位论文TheDesignofDDSBasedonFPGAIntroductionoftheanthor:rtlanwei,male,wasborninOctober,1984whosetutorwasProfessorChertJinying,HegraduatedfromChengduUniversityofTechnologyinSignalandinformationprocessingmajorandwasgrantedtheMasterDegreeinJune,,Phase—lockedSynthesisandDirectDi#munication,radar,onfrontation,aeronautics,instrumentandsoOil.‘Thedirectdistalfrequencysynthesizerisakindoffullydigitizedfequeneysynthesizer,umulator,ROMlook·uptable,digitaltoanalogconverter,,fastfrequeneyswitchingspeed,theabilitytomaintainingconstantphasewhileswishfrequency,,thedesignuse32-umulator,pressionalgorithm,,thedissertationreviewsthehistoryoffrequeneysynthesistechniques,andsummarizedthecharacteristicsofthedirectdigitalfi-equeneysynthesistechniquesandapplicationina11fields,andanalysisthefeasibilityandsignificanceofrealizingthedirectdigitalfrequeneyttechniquebasedonFieldProgrammableGateArray(FPGA);Secondly,itanalysisthestructureofthedirectdigitalfrequencyanalysisandtherelationshipbetweeninputandoutput,thenanalysisthespectrumcharacteristiesoftheoutputsignalindetail,meanwhileitdiscussesthesourceofthestrayandthemethodtOinhibitthestray;,Thirdly,panyandthedevelopmentsoftwareanddesignprocess;Then,itdesigneseachmoduleofDDSsystembyVeriloglanguageandintegratessimulation,andproducessinewave,cosinewave,squarewave,sawtoothwave;Finally,itbrieflyanalysistheresultsoftheoutput。Keywords:DirectDigitalFrequencySynthesis,FieldProgrammableGateArray,SpectrumAnalysis,Low-、数字电视、***系统、航空航天以及遥控遥测技术的不断发展,对频率源性能的要求越来越高,包括对频率的稳定度、频谱纯度、频率范围和输出频率数量的要求不断提高,一般的电子振荡器已经满足不了要求,为了提高频率源输出频率的性能以满足实际应用中的需求,经常采用高稳定性和高准确性的晶体振荡器。但是晶体振荡器产生的频率信号过于单一或者只能在很小范围内可微调。然而,在各种通信领域中往往需要在一定频率范围内提供一系列稳定和准确的频率,为了解决这些问题,于是产生了频率合成技二十世纪三十年代产生的频率合成技术,距今已经有八十多年的历史。早期的频率合成技术采取的