運用數(shù)字中頻技術(shù)的TD-SCDMA基帶信號源設(shè)計.pdf

1、浙江工業(yè)大學碩士學位論文運用數(shù)字中頻技術(shù)的TDSCDMA基帶信號源設(shè)計姓名：仝雷申請學位級別：碩士專業(yè)：通信與信息系統(tǒng)指導(dǎo)教師：華驚宇20120405浙江工業(yè)大學碩士學位論文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