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1、原文：ChannelCapacityofSpace-TimeBlockCodingHéctorCarrascoEspinosa,JavierR.FonollosaandJ.A.DelgadoPenínDepartmentofSignalTheoryandCommunicationsAbstract:Multiple-elementtransmitandreceiveantennashaveshownverypromisingresultsforimprovedbiterrorrateandspect

2、ralefficiency.Space-TimeBlockCoding(STBC)isoneoftheremarkablemodulationschemesproposedformultiple-antennawirelesssystemsprovidingfulldiversitygains.STBCrequiresimpleencodinganddecodingatlowcomputationalost.Ontheotherhand,however,thedatarateiswellbelowt

3、hetheoreticcapacitylimitoftheMultiple-InputMultiple-Output(MIMO)channel,becauseSTBCperformanceisequcivalenttoacombinedtransmitandreceivemaximalratiocombiner.Inthiswork,wepresentresultsofchannelcapacityassociatedtotheuseoftheSTBCmatricesproposedintherel

4、atedpublications.ThechannelisassumedtobeRayleighorRice,quasi-staticandflat,uncorrelatedandpartiallycorrelatedaccordingtoarealisticchannelmodel.CapacityiscomputedbyMonte-Carlosimulationsforahorizontaluniformlineararrayatthebasestation,inamacrocellularur

5、banenvironment.I.IntroductionInformationtheoryresearchhasshownthattherich-scatteringwirelesschanneliscapableofenormoustheoreticalcapacityifthemultipathisproperlyexploited[Foschini98].Multiple-elementtransmitandreceiveantennashaveshownverypromisingresul

6、tsforimprovedbiterrorrateandspectralefficiency.Transmitdiversityhasbeenstudiedextensivelyasamethodtocombatfadinginwirelesschannelsbecauseofitsrelativesimplicityofimplementationandfeasibilityofexploitingmultipleantennasatthebasestation.Space-TimeBlockCo

7、ding(STBC)isoneoftheremarkablemodulationschemesproposedformultiple-antennawirelesssystems.STBC,developedonthebaseofasimpleschemefortransmissionusingtwotransmitantennas,generalizethetransmissionschemetoanarbitrarynumberoftransmitandreceiveantennasandare

8、abletoprovidefulldiversitygainovercoherentflat-fadingchannels.STBCrequiresimpleencodinganddecodingatlowcomputationalcost.Ontheotherhand,however,theachieveddatarateiswellbelowthetheoreticcapacitylimitoftheMultiple-InputMultiple-Output(MI