[高频电路相关资料].Cmos.Radio.Receiver.pdf

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1、ADirect-ConversionCMOSRadioReceiverforHighSpeedPagingAthesissubmittedtoTheHongKongUniversityofScienceandTechnologyinpartialfulfillmentoftherequirementsfortheDegreeofDoctorofPhilosophyinElectricalandElectronicEngineeringbyZhihengChenDepartmentofElectricalandElectronicEngineeringBachelorofEn

2、gineeringinRadioEngineeringSoutheastUniversity,Nanjing,China,1992MasterofEngineeringinRadioEngineeringSoutheastUniversity,Nanjing,China,1995November2000ADirect-ConversionCMOSRadioReceiverforHighSpeedPagingbyZhihengChenApprovedby:Dr.JackLauThesisSupervisorProf.JohnWeiThesisExaminationCommit

3、teeMember(Chairman)Prof.PhilipC.H.ChanThesisExaminationCommitteeMemberDr.RogerChengThesisExaminationCommitteeMemberProf.RolandChinThesisExaminationCommitteeMemberProf.PhilipC.H.ChanHeadofDepartmentDepartmentofElectricalandElectronicEngineeringTheHongKongUniversityofScienceandTechnologyNove

4、mber2000ADirect-ConversionCMOSRadioReceiverforHighSpeedPagingbyZhihengChenfortheDegreeofDoctorofPhilosophyinElectricalandElectronicEngineeringatTheHongKongUniversityofScienceandTechnologyinNovember2000ABSTRACTAstheradiopagingsystemisupgradedfromPOCSAGtothehighspeedFLEXorERMESprotocol,botht

5、hemodulationlevelandthebaudrateareincreased.Whatisunchangedistheavailablebandwidth.Consequently,themodulationindexisdecreasedandadditionaldifficul-tiesareimposedonthedesignofadirect-conversionreceiver.Themainproblemsare(1)therearenomaturedemodulationtechniquesavailableforzero-IFM-aryFSKsig

6、nals,and(2)thesignalcontainsstrongDC/low-frequencyenergyandhenceDCoffsetcancellationisnolongeraneasytask.Inthisdissertation,adirect-conversionreceiverisdesignedforhighspeed4FSKradiopag-ingapplications.Variousdesignconsiderationsarediscussedandanalyzed.Azero-crossingbasedcounting/comparings

7、chemeischosenforthedemodulation.TheBERisimprovedbyanovelzero-crossinginterpolationtechnique.Followingofficialspecificationsonradiopagingreceivers,ahighlevelsimulationiscarriedouttoverifythedemodulatorperformanceandderivecircuitrequirements.Theself-mixing-relat