PAGEII基于FPGA的调制信号发生器设计研究摘要直接数字频率合成技术在通信系统中被广泛采用。在研究直接数字频率合成技术的基本原理的基础上，利用FPGA的DSP开发工具DSPBuilder对直接数字频率合成器进行了建模设计，仿真结果显示该DDS频率及相位可灵活调整，具有较高的频率分辨率，能够实现频率及相位的快速切换，并将其应用在模拟调制和数字调制系统中。通过仿真分析证明设计方法的正确性和实用性。本文对通信信号中的AM信号、FM信号、ASK信号、FSK信号、PSK信号等根据DDS的基本原理，利用Matlab/DSPBuilder进行建模,然后用Altera公司提供的SignalCompiler工具对其进行编译，产生QuartusII能够识别的VHDL源程序，并且给出了采用Altera公司的Cyclone系统的FGPA芯片EP1C3T144C8进行仿真，并用ModelSim进行功能仿真及用QuartusII进行时序仿真,以验证所设计的信号满足要求，通过仿真分析设计方法的正确性和实用性，并用EDA实验设备实现,在示波器上观测所设计的信号。文中还简单应用了DSPBuilder设计中的层次化设计来完成调制集成系统的研究，有助于设计复杂的DSPBuilder模型。关键字现场可编程门阵列，直接数字频率合成，模拟调制，数字调制，DSPBuilderPAGEIIABSTRACTDirectdigitalsynthesizertechnologyiswidelyappliedincommunicationsystem.Basedonstudyingthebasictheoryofdirectdigitalsynthesizertechnology,thispassagemakesmodeldesignofDDSwithDSPBuilderofFPGAandappliesDDStodigitalmodulationsystem.ThisDDS’sparameterscanbeadjustedflexibly,simulationresultshowsDDShashighresolutionandfastsettingtime.ThecorrectnessandfeasibilityofDDSwillbeprovedthroughsimulationanalysis.thisarticletosignalsinthesignalcorrespondswhichisAM、FM、ASK、FSK、PSKsignalisaccordingtotheDDSbasicprinciple,establishedtheDDSbasicmodelusingMatlab/DSPBuilder,thentheSignalCompilertoolwhichprovidedusingtheAlteraCorporationtoitcarriesonthetranslation,hasVHDLsourceprogramwhichQuartusIIcoulddistinguishandproduceusesAlteraCorporationcycloneseriesFPGAchipEP1C3T144C8carriesthesimulation.UsingModelSimmakesthesimulationoffunction,andusingQuartusIImakesthesimulationoforderwhencarriesonverifythesignaldesignmeettherequirement.CorrectnessandpracticalitytodesignmethodisanalyzedbythesimulationAndtestwithEDAtheequipmentrealizeandobserveandanalyzeontheoscilloscopesignaldesign.InthearticlealsosimplyappliedDSPBuilderdesignhierarchicaldesigntocompletethemodulationintegrativesystem'sresearch.itwashelpfulindesigncomplexDSPtheBuildermodel.KeywordsFPGA，DDS，AnalogModulation，DigitalModulation，DSPBuilder目录TOC\o"1-3"\h\z\uHYPERLINK"file:///C:\\Documents%20and%20Settings\