burstmode是什么意思

IntheCommunicationsToolbox™SupportPackageforUSRP™EmbeddedSeriesRadio,ifareceiverblockorSystemobject™cannotkeepupwiththeradiohardware,themodelorcodeisnotprocessingdatainrealtime.Burstmodeenablesyoutobufferasetofcontiguoussampleswithoutlosingsamplesbysettingthenumberofframesinaburst.Thenumberyoucansetishardware-dependent.Theblockorobjectgrabsafreshsetofsamplesforeachburst.Thereforelostsamplescanhappenbetweenbursts,especiallywithlargeburstsizes.Ifyourmodelcankeepupinrealtime,donotuseburstmode.

mendedthatyouenableuaranteedcontiguoussamples.Toseeifthereceiveddataiscontiguous,enabletheoverflowindicatoronthereceiverblockorobject.Formoreinformation,seeDetectUnderrunsandOverruns.

TheE3xxReceiverblockhasanEnableburstmodeparameter.Whenyouselectthisparameter,theblockproducesasetofcontiguousframeswithoutanoverruntotheradiohardware.Enableburstmodetosimulatemodelsthatcannotruninrealtime.SpecifytheamountofcontiguousdatausingtheFramesinburstparameter.Thedefaultnumberofframesinaburstis1.

m.SDRRxE3xxSystemobjecthasanEnableBurstModeproperty.Whenyousetthispropertytotrue,theobjectproducesasetofcontiguousframeswithoutanoverruntotheradiohardware.Forexample:

Thissettingcanhelpsimulatemodelsthatcannotruninrealtime.YoucanspecifytheamountofcontiguousdatausingtheNumFramesInBurstproperty.Thedefaultnumberofframesinaburstis1.

Burstmoderequiresafreshsetofsamplesfromthehardware.Therefore,whenyoucallareceiverSystemobjectforthefirsttimewithburstmodeenabled,theoverflowoutputargumentis1.Likewise,thefirsttime-stepofablockwithburstmodeenabledassertstheoverflowport.

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