TD-LTE-Advanced发射机中功率放大器和上混频器的设计-豆柴文库

您所在位置：网站首页 / TD-LTE-Advanced发射机中功率放大器和上混频器的设计.docx / 文档详情

在线预览结束，喜欢就下载吧，查找使用更方便

5 金币

下载文档

/ 2

下载提示

如果您无法下载资料，请参考说明：

1、部分资料下载需要金币，请确保您的账户上有足够的金币

2、已购买过的文档，再次下载不重复扣费

3、资料包下载后请先用软件解压，在使用对应软件打开

文本预览

TD-LTE-Advanced发射机中功率放大器和上混频器的设计
Introduction
LTE-Advanced(Long-termEvolution-Advanced)isastandardthathasbeendevelopedtofurtherenhancetheperformanceofLong-termEvolution(LTE)networks.Itintegratesseveralfeaturessuchascarrieraggregation,heterogeneousnetworks,andenhancedphysicallayercapabilities.TD-LTE-Advanced(TimeDivision-Long-termEvolutionAdvanced)isavariantofLTE-Advancedthatusestimedivisionduplexing(TDD)fordatatransmission.Thispaperdiscussesthedesignofthepoweramplifierandup-converterinTD-LTE-Advancedtransmitters.
PowerAmplifierDesigninTD-LTE-AdvancedTransmitters
Poweramplifiers(PAs)arecriticalcomponentsinRFtransmittersastheydeterminesignalstrength,spectralefficiency,andpowerconsumption.InTD-LTE-Advancedtransmitters,PAsmustbedesignedforhighefficiency,linearity,andreliability.
OneapproachtoachievehighefficiencyistouseClassDamplifiers,whichoperateinswitch-modeandprovidehighoutputpowerwhileminimizingheatdissipation.TheenvelopetrackingtechniquecanalsobeusedtoimprovePAefficiencybydynamicallyadjustingthevoltagesupplytotheamplifieraccordingtotheamplitudeofthesignal.Thistechniquereducespowerconsumptionandprovidesbetterlinearity.
Intermsoflinearity,PAsmustbedesignedtominimizedistortionandintermodulationproductsthatcandegradesignalquality.Linearizationtechniquessuchasdigitalpredistortion,analogpredistortion,andfeedforwardtechniquescanbeappliedtoimprovelinearity.
ReliabilityisanotherimportantconsiderationinPAdesign.PAsmustbeabletooperateconsistentlyindifferenttemperatureandloadconditionswhilemaintainingoptimalperformance.PAswithhighpowerhandlingcapabilitiesandruggedizedpackagescanbeusedtoachievereliability.
Up-converterDesigninTD-LTE-AdvancedTransmitters
Theup-converterisresponsibleforconvertingthebasebandsignalfromthedigitaldomaintotheRFdomainfortransmission.InTD-LTE-Advancedtransmitters,theup-convertermustbedesignedforhighspectralpurity,lownoise,andlowpowerconsumption.
Oneapproachtoachievehighspectralpurityistousemixerswithlowconversionlossandhighisolationproperties.Theconver