ISDB-Tmm 调制标准

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1、ISDB-Tmm调制标准  ISDB-TmmisanextensiontoISDB-Tforterrestrialmobilebroadcasting.Itallowsupto33segmentsconcatenatedwithoutguardband.Receiverstunetoasub-bandofthefullsignal.   ISDB-TMM标准是ISDB-T在地面移动广播的一个扩展。它允许多达33段串连无保护带。接收机调谐到全部信号的一个子波段 ISDB-Tmmisavailableasamodulationoptionforall

2、DekTecVHF/UHFmodulators.Themaximumbandwidthis8Mhz,exceptontheDTA-2111andthenewDTA-2115,whichsupportthefull14.5MHzbandwidthrequiredfor33-segmentISDB-Tmm. ISDB-TMM可作为DekTecVHF/UHF所有调制器的调制选项。最大带宽为8MHz，除此之外，DTA-2111和新的DTA-2115，它支持33段ISDB-TMM所需的完整14.5MHz带宽。33-segmentISDB-Tmmmodula

3、tionwiththeDTA-2111ISDB-Tmm (Terrestrialmobilemulti-media)isamobilebroadcastingsystembasedonISDB-Ttechnology.ISDB-Tmmallowsanycombinationof13-segment(TypeA,ISDB-Tcompliant)and1-segment(TypeB,ISDB-Tsbcompliant)signals,uptomaximumof33segments(bandwidth14.5MHz).Noguardbandisused

4、,foraveryefficientusageofthespectrum.ThefigurebelowshowsapossibleISDB-Tmmsegmentarrangement:The DTA-2111 VHF/UHFmodulatorcardsupportsamaximumbandiwdthof16MHz.WiththenewISDB-Tmmoption,thisenablesreal-timegenerationofISDB-Tmmsignalsupto14.5MHzbandwidth.Youcancreateyourownreal-t

5、imeISDB-TmmapplicationusingDekTec'sSDK(DTAPI):ThisallowsyoutoconfiguretheISDB-Tmmmodulationparametersinanywayyouwant.Inaddition,theISDB-Tmmoptionincludesalicenseforthe TmmXpress application,anISDB-Tmmtest-signalgenerator.Theintuitiveandeasytousegraphicaluserinterfaceletsyoucr

6、eateanycombinationof13-,3-and1-segmentsuptoatotalof33segments.Youcanalsoconfigurethesignalparameters,selectinputtransportstreamfiles,addnoise,addmultipathfadingandgenerateeitheranISDB-Tmm,-TSBor-Tsignal.TheTmmXpressisidealforuseasanISDB-TmmsignalgeneratorinyourR&Dlab,fordemon

7、strations,andforISDB-Tmmvalidationtestsofmobilephones,settopsandTVs.