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1、浙江工業(yè)大學(xué)碩士學(xué)位論文運(yùn)用數(shù)字中頻技術(shù)的TDSCDMA基帶信號(hào)源設(shè)計(jì)姓名:仝雷申請(qǐng)學(xué)位級(jí)別:碩士專(zhuān)業(yè):通信與信息系統(tǒng)指導(dǎo)教師:華驚宇20120405浙江工業(yè)大學(xué)碩士學(xué)位論文THEDESIGNoFTDSCDMABASEBANDSIGNALGENERATORUSINGTHEDIGITALINTERMEDIATEFREQUENCETECHNOLOGYABSTRACTAtpresent,TD—SCDMAhasbeenintothecommer
2、cializationmassivelyanditsevolutionversionTD—LTEhasbeeninvolvedintothetestingstageinsomecitiesTD—SCDMAandTDLTEbasestationprocessthebasebandsignaltransmittedfromtheremotemoduleMeanwhilealargenumberofsignalsourcesareneeded
3、forcommunicationequipmentindeveloping,researchandtestingprocessHoweverthepriceofbasebandsignalsourcesisexpensiveinthemarketandtheyalSOexhibitsomelimitationsSostudiesofTD—SCDMAbasebandsignalsourcedesignhavecertainpractica
4、lsignificanceFirst,anoisemodelisdesigned,thismodelcanavoidaddingnoiserepeatedlyWeadopttwowaystOverifythefeasibilityofthemodeldesignInviewofthedefectsofthe2一Dradiochannelmodel,byintroducinganonzeroelevationangleofthearriv
5、ingwaveonthebasisofplaneazimuthalangle,wemodel3一DwirelessdownlinkchannelusingtheautoregressivefiltertechnologyandstudythestatisticalpropertiesofthechannelThen,fadingchannelmodelisachievedinADSsoftwareanddownlinkchannelph
6、ysicalsignalisgeneratedAndthenanalysethegenerationmethodofintermediatefrequencyandgeneratefadingIFsignalMoreoverthisthesisgivestheframeworkoftheoveralldesignofdigitaldownconversionwithAD6654coresignalprocessorAndstudiest
7、hecircuitschematicdesignofthevarioushardwaremodulesindetail,includingclockcircuitdesign,analogtodigitalconverter(ADC)design,thedigitaldownconversion(DDC)design,thecontrolcircuitdesign,powercircuitdesignandSOon,thenanalys
8、essomecommonproblemsofsignalintegritysuchasreflection,crosstalk,andgivessomeimprovementsAndthen,designsthePCBwiththeuseofCadenceAllegro,laminateddesign,PCBlayoutdesign,power/gnddesignandlayoutdesignareincluded,amongthemw
9、eespeciallyfocusondifferencelinewiringAndthencarryoutadetailedanalysisanddiscussionoftheabovedesignFinallyweusesimulationsoftwareSigXplorerofCadenceandADSsoftwaretosimulatethekeyclocklineandthedatalineonthePCB,anduseSiwa
10、vesoftwaretosimulatethepowerintegrityofthePCBPCBlayoutismodifiedbytheresultofsimulation,ensuringthesignalintegrityandpowerintegrityofthekeynetworkKeyWords:Signalsource,3Ddownlinkchannelmodeling,ADS2005AsoftwareCadence,Si
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