射頻前饋放大器自適應(yīng)檢測控制模塊研究與設(shè)計.pdf

1、湖南大學碩士學位論文射頻前饋放大器自適應(yīng)檢測控制模塊研究與設(shè)計姓名：朱紅濤申請學位級別：碩士專業(yè)：電路與系統(tǒng)指導教師：曾文海20071128Abstract舢thebusinessimplementationofthelhirdgenerationmobilecommunlcatlonsystem，therequirement0fthete衄inalequipmenthaVebeenincreasedalotBecause0fhighs

2、pectralefficiencyandspeedinthesesystem’highlinearityofRFamplifierisrequirednecessarilyFeedforwardtechn0109yisagOodmethodimpIlcatedlnpower1inearitv，therefore，theresearchofRFfeedfo刑ardpoweramplifierisapractlcalandchallenge

3、topicFirstlvthenonlinearityofRFpower缸lplifierhasbeenanalyzed1nthlstnesls，aCcordingt0thechangeable七nVelopemodulationtechnologyandmultl‘camertransmittancemethodadoptedinthemodemcommunicationsystemwldely，lnenonline麗tyOfPAha

4、vebeendiscussedbythesetwomethodimportantlySecondly’therelevantindicatorsofPAhavebeenintroducedspecificallysuchasthedetlmtlonoflinearitydegree，intemediuminterferencede伊eeands0onInthestatusotlargesignalandmuhicarriermodula

5、tion，thenonlineardistortioncxistinallcommonamplifier，itiscritical卸dnecessarytodesignhighlinearityde莎eeampllfler1：or‘hemodemcommunicationsystemTherehaVesomewaystoimproVetheamplifler’slinea柵includingfeedfomard，powerbackwar

6、dandpredistortionTheadVantageoffeedforwardmethodhasbeenemphasizedaccordingt0thecomparlsonamongtnesemethOdsThefeedf0州ardmethodhasbeendiscussedindetailcombinedwiththemodemcommunicationsystemapplicati0Ⅱincludingprinciple，ma

7、thema‘1cmodelandsoftwaresimulationneoneimportanceofthethesisistoanalyslsanddeslgntneadaptivecontroldetectionOnenewdetectionmethod0finsertedleadfrequencymodulatedquarteraudi0signalh弱beenanalyzedasthe0necreationpoIntofthls

8、thesisNotonlytheprinciple，mathematicanalysisandADSsoftwareslmulatlonhaVebeendiscussed，butthehardwaredesigIlhasbeen蛆alyzedandrealizedindetallAIlotherpart0fmythesisisadaptivecontrol；amathematicmethodLMShasbeendiscussed，the