《RF校准软件设计》PPT课件

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1、手机射频校准什么是射频校准？TheprocessofobtainingRFparametricdatatobeusedbythephoneforthepurposeofcompensatingfornon-lineardevices,frequencyvariations,andtemperaturevariationsOutputfromthecalibrationprocessisstoredinnon-volatile(NV)memoryDMSSusesRFNVitemsduringnormalopera

2、tiontoensuresystemperformanceismet.射频校准的意义?(1)SubscriberunitshavedifferingRFcharacteristics.-Somecharacteristicsvaryfromoneunittothenext-Othercharacteristicsvaryfromonedesigntothenext射频校准的意义?(2)ThesubscriberunitmustestimatetheRxpowerproperlytomaximizesignalt

3、onoiseratiosandtoprovideabasisforTxpoweroutput.ThesubscriberunitmusttransmitatcorrectTxpowerleveloveritslargedynamicrange.射频校准的意义?(3)TheMSMdeviceandsystemsoftwarecombinationmust“know”theRFcharacteristicsoftheparticularunit.ThisinformationisknownasRFcalibrati

4、ondata.FailuretocompensatefordifferingRFcharacteristicsmaycausetheunittofailminimumperformancespecifications.射频校准的意义?(4)CalibrationConsideration:-SomeNVItemswillbestaticperphonedesign»Ex:NV_CDMA_ENC_BTF-OtherNVitemswillvaryfromonephonetothenextandneedtobecal

5、ibrated»Ex:NV_CDMA_TX_LIN_MASTER_1射频校准的信号流图射频校准工位搭建NV项Calibrationcompensatesfornonlinearcharacteristics,andtemperatureandfrequencyvariationsintheperformanceoftheTxandRxpathcomponentsinasubscriberunitOutputfromthecalibrationprocessarestoredinnonvolatile(NV)me

6、moryitemsinAMSSsoftwareDMSSsoftwareloadscalibrationvaluesintoMSMregistersorusesthemforsoftwareprocessingduringnormalDMSSoperationNVitemscanbeaccessedusingrawDIAGcommandsorusingDIAG-basedtools,suchastheQPSTRFCalibrationTool•SomeNVitemswillbestaticperthehardwa

7、redesignOtherNVitemswillvaryfromoneunittothenextSomeelementswithinanNVitemcanbeextrapolatedNV项类型StaticRFNVItems:Valueisdeterminedbydesignanddoesnotchangeforthesamedesign.Ex:NV_CDMA_NONBYPASS_TIMER_ICalculatedRFNVItems:Valueiscalculatedbasedonotherparameterso

8、fthedesignconfigurationandvaluedoesnotchangeforagivenconfiguration.Ex:NV_CDMA_LNA_RANGE_RISE_IMeasuredRFNVItems:ValueisdefinedbyRFcalibrationprocessandeachdevicemayhaveadifferentvalue.Ex:NV_CDMA