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1、EUROPEANCOOPERATIONCOST2100TD(09)950INTHEFIELDOFSCIENTIFICVienna,AustriaANDTECHNICALRESEARCHSep28-30,2009EURO-COSTSOURCE:Eurecom,ForschungszentrumTelekommunikationWienExploitationofReciprocityinMeasuredMIMOChannelsFlorianKaltenbergerEurecom2229,RoutedesCre
2、tes-B.P.19306904SophiaAntipolis,FranceMaximeGuillaudftw.ForschungszentrumTelekommunikationWienDonau-City-Strasse11220Wien,AustriaPhone:+33493008186Fax:+33493008200Email:florian.kaltenberger@eurecom.frExploitationofReciprocityinMeasuredMIMOChannelsFlorianKal
3、tenbergerMaximeGuillaudEurecomFTWForschungszentrumTelekommunikationWienSophiaAntipolis,FranceVienna,AustriaEmail:florian.kaltenberger@eurecom.frEmail:maxime.guillaud@ftw.atAbstractInthisworkwestudythefeasibilityofrelative[5],[6],[7].Inthiscontext,thecalibra
4、tionreliesonthecalibrationtoexploitchannelreciprocityinamultiple-devicesexchangingchannelmeasurements,ratherthaninputmultiple-output(MIMO)timedivisionduplex(TDD)onextracalibrationhardware.Westudythefeasibilitysystem.AsanextensiontotheworkofGuillaudetal.ofr
5、elativecalibrationusingrealtwo-directionalchannel(2005),wherethemethodwasonlyappliedtoSISOandSIMOchannels,realtwo-directionalchannelmeasure-measurements,whichweretakenwiththeEurecommentswereperformedusingtheEurecomMIMOOpenairMIMOOpenairSounder(EMOS).Thiswo
6、rkcanbeSounder(EMOS).Thesetupconsideredhereismoreseenasacontinuationof[6],wherethemethodwasrealistic,sinceafasterrepetitionrate,synchronizationofonlyappliedtoSISOandSIMOchannels.Furthermoretransmitterandreceiverovertheair,andfrequencyoffset,thenewmeasureme
7、ntsaremorerealistic,sincetheyuseareaccountedfor.Oneofthemajorfindingsinthepaperisamodificationtothesystemmodelthatcorrectlydescribesafasterrepetitionrateandsynchronizationoftransmitterthenon-negligiblephasedriftpresentinthemeasurements.andreceiverisdoneovert
8、heairasinarealsystem.Wedemonstratethatinasingle-userMIMOchannelandContributions.Inthisarticle,wepresentanoverviewforlowsignal-to-noise(SNR)ratios,therelativecalibrationofthenumericalmethodsapplicabletoexploit
