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1、High-SpeedDataConversionforDigitalUltra-WidebandRadioReceiversbyPuneetPrashantNewaskarSubmittedtotheDepartmentofElectricalEngineeringandComputerScienceinpartialful?llmentoftherequirementsforthedegreeofMasterofScienceinElectricalEngineeringandComputerScienceattheMASSACHUSETTSINSTI
2、TUTEOFTECHNOLOGYJune2003cMassachusettsInstituteofTechnology2003.Allrightsreserved.Author..............................................................DepartmentofElectricalEngineeringandComputerScienceMay23,2003Certi?edby..........................................................
3、AnanthaP.ChandrakasanProfessorofElectricalEngineeringandComputerScienceThesisSupervisorAcceptedby.........................................................ArthurC.SmithChairman,DepartmentCommitteeonGraduateTheses2High-SpeedDataConversionforDigitalUltra-WidebandRadioReceiversbyPune
4、etPrashantNewaskarSubmittedtotheDepartmentofElectricalEngineeringandComputerScienceonMay23,2003,inpartialful?llmentoftherequirementsforthedegreeofMasterofScienceinElectricalEngineeringandComputerScienceAbstractUltrawidebandradio(UWB)isanewhigh-speedwirelesstechnologythatusessub-n
5、anosecondpulsestotransmitinformation.Implementinganall-digitalUWBre-ceiverhasnumerousbene?tsrangingfromlowcostandeaseofdesignto?exibility.DigitizinganRFsignalneartheantenna,however,introducesitsownsetofchal-lengesandhastraditionallybeenconsideredinfeasible.Ahigh-speed,high-resolu
6、tionanalog-digitalconverter(ADC)isdi?culttodesign,andisextremelypower-hungry.However,duetotheuniquespectralcharacteristicsofUWBsignalsandtheirnoiseenviroment,itcanbeshownthatreliabledetectionofaUWBsignalisachievablewithveryfewbitsofresolutionintheADC.Inthisthesis,theroleofquantiz
7、ationnoiseinUWBsystemsisanalyzedandthesu?ciencyof4bitsofprecisionisdemonstrated.Dataconversionatseveralgigasamples/sec(GSPS)isneverthelesschallenging,evenatlowresolutions.Thefeasibilityofthisproblemhasbeeninvestigatedthroughthedesignandimplementationofa4-bit,4GSPSADCforaprototype
8、UWBsystem,usinga0.18μmCMOSprocess.Atime-
