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通信专业英语8.ppt

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munication-3GPartOneITU-RRA-municationtechnologyspecificationsincludingthoseofTD--ess,orTD-SCDMA,municationsstandard,beingpursuedinthePeople'municationsTechnology(CATT),DatangandSiemensAG,inanattemptnottobe"dependentonWesterntechnology".Thisislikelyprimarilyforpracticalreasons,-pletelythepaymentoflicensefeestowesternpatentholders.①ThelaunchofanationalTD-workwasinitiallyprojectedby2005buthasstillnotbeenachieved;mercialtrials"acrosseightcitieswaslaunchedonApril1,2008andwilleventuallyinclude60,-1SimplifiedsketchoftheNodeBmeasurenents,andthesignallingflowfromtheRNCtotheNodeBandtheUEduringbeamswitching葫敏***欧赎拘仪橱炳穿畴锥违极裴勋卷貌牌仰婚疏迭昂甘煞耻滞指挡疑她通信专业英语8通信专业英语8ATD-SCDMAsystemhasthreeparts:RNC, direction-of-arrival(DoA)-to-interferenceratio(SIR)onthededicatedphysicalcontrolchannel(H),theRNCwilltypicallyinformtheNodeBtotransmitthedatatoaUEunderthebeam(cellportion)correspondingtothehighestuplinkmeasuredSIR,aswellasinformingtheUEwhichS-CPICHitshoulduseforphasereferenceviaaradioresourcecontrol(RRC)message,asillustratedinFigure8-,(munication) -SCDMA(TimeDivision--ess)(CATT)spectrumn.(频)谱RNC(workController) (Base) (UserEquipment)

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