關(guān)于外文翻譯

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1、關(guān)于外文翻譯關(guān)于外文翻譯__基于MIMO_OFDM系統(tǒng)的正交空時分組碼【導(dǎo)讀：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關(guān)于外文翻譯__基于MIMO_OFDM系統(tǒng)的正交空時分組碼【導(dǎo)讀：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.