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ID:24330379
大小:49.50 KB
页数:3页
时间:2018-11-13
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1、关于外文翻译关于外文翻译__基于MIMO_OFDM系统的正交空时分组码【导读:severalstreamsultaneouslytransmittedbyantennas.Soamaximum-likelihooddecodingalgorithmcanbeusedatthereceivertoachievethemaximumdiversityorderIntroductionMostunicationshadfocusedonhavinganantennaarrayatonlyoneendoftheeBlockCodesforMIMO-OFDMSystems
2、Space-timecodeinmobilemunicationsystem,andorthogonaldesinginmultiple-antennassemearedicsussed.Bythemethods,dataisencodedusingaspace-timeblockcodeandissplitintoseveralstreamsultaneouslytransmittedbyantennas.Soamaximum-likelihooddecodingalgorithmcanbeusedatthereceivertoachievethemaximu
3、mdiversityorderIntroductionMostunicationshadfocusedonhavinganantennaarrayatonlyoneendoftheinalpapersbyGerardJ.FoschiniandMichaelJ.Gans[1],Foschini[2]andEmreTelatar[3]enlargedthescopeofunicationpossibilitiesbyshoentsubstantialcapacitygainsareenabledultipleantennasreliesonhavingmultipl
4、etransmitantennasandonlyoptionallymultiplereceiveantennas.ProposedbyVahidTarokh,NambiSeshadriandRobertCalderbank,thesespace–timecodes(STCs)achievesignificanterrorrateimprovementsoversingle-antennasystems.Theiror关于外文翻译__基于MIMO_OFDM系统的正交空时分组码【导读:Foschini's1998paper.AnSTBCisusuallyrepre
5、sentedbyamatrix.Eachroeslotandeachcolumnrepresentsoneantenna'stransmissionsovertime.12iginalschemeplerblockcodesouti,andlaterVahidTarokh,HamidJafarkhaniandRobertCalderbanktodevelopspace–timeblock-codes(STBCs)[4].STCinvolvesthetransmissionofmultipleredundantcopiesofdatatopensateforfad
6、ingandthermalnoiseinthehopethatsomeofthemmayarriveatthereceiverinabetterstatethanothers.InthecaseofSTBCinparticular,thedatastreamtobetransmittedisencodedinblocks,ongspacedantennasandacrosstime.ultipletransmitantennas,itisnotnecessarytohavemultiplereceiveantennas,althoughtodosoimprove
7、sperformance.Thisprocessofreceivingdiversecopiesofthedataisknoatrix.Eachroeslotandeachcolumnrepresentsoneantenna'stransmissionsovertime.
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