抽取因子可變的數(shù)字下變頻實(shí)現(xiàn).pdf

1、學(xué)號(hào)：201100357024分類號(hào)：TN911碩士學(xué)位論文抽取因子可變的數(shù)字下變頻實(shí)現(xiàn)研究生姓名：張昆昆指導(dǎo)教師：范文強(qiáng)副教授、劉云學(xué)副教授學(xué)科門類：工學(xué)專業(yè)名稱：電子與通信工程論文提交日期：2013年04月煙臺(tái)大學(xué)碩士學(xué)位論文IIAbstractDDCisatechnologytointermediatefrequencydigitalsignaltothezerointermediatefrequencydownconversio

2、nsignalratepedtoatechnologysuitablefgeneralpurposedigitalsignalprocessingdevicesprocessingrate.themarketinDDCextractinghighmultiples、stableperfmancebutitsflexibilityispodoesntbringtheadvantagesofsoftradioiswellrepresente

3、d.FPGArapiddevelopmentinrecentyearsthepowerfulprocessingcapability、shtdevelopmentcyclecannowlinerefactingmakeitplayanincreasinglyimptantroleintheresearchdevelopmentofsoftwareradio.Microwavetestsystemreceivingthesignalsof

4、differentfrequenciessuchas0.8MHz、30MHz50MHz.Thesereceivedsignalsneeddesignmultipledigitaldownconverterresourceswillgreatlyoccupied.Tosolvethisproblemwehaveadepthresearchmakeafactvariabledownconversionrealization.Inthisde

5、signeachdecimationfactdigitaldownconversionistimesharing.Toensurethecrectnesspracticalityofthewholesystem.ThispaperstudiesanalyzethemainmodulesofDDC:NCOmoduleCICfiltermoduletheHBfiltermoduleFIRfiltermoduleachievethemaina

6、lgithmanalysistoeverymodule.Usingmatlabftheallocationofthedifferentdecimationfactofeachfilterdecimationmultiples.determinethevariousparametersofthefiltersuchasthederoffilter.theIPCEoftheNCO、theCICfilter、HBfilterFIRfilter

7、arecalledtheparametersareed.Thedigitaldownconversionsystemusingveriloglanguagetobuildinrealtimesignalobservedinsignaltaposcilloscopespectrumanalysisinmatlabfmultipledecimationfacts.Theresultsshowthatfdifferentdecimationf