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ASimple TransmitDiversity Technique forWireless Communications
SiavashM.Alamouti
Abstract—Thispaperpresentsasimpletwo-branchtransmit
diversityscheme.Usingtwotransmitantennasandone
receiveantennatheschemeprovidesthesamediversityorder
asmaximal-ratioreceivercombining(MRRC)withonetransmit
antenna,andtworeceiveantennas.Itisalsoshownthatthe
schememayeasilybegeneralizedtotwotransmitantennasand
Mreceiveantennastoprovideadiversityorderof2M.The
newschemedoesnotrequireanybandwidthexpansionany
feedbackfromthereceivertothetransmitteranditscomputation
complexityissimilartoMRRC.
IndexTerms—Antennaarrayprocessing,basebandprocessing,
diversity,estimationanddetection,fademitigation,maximalratio
combining,Rayleighfading,smartantennas,spaceblock
coding,space–timecoding,transmitdiversity,wirelesscommunications. |
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