SUCCESSIVE BEAMFORMING, MULTIUSER DETECTION AND DIVERSITY RECEPTION FOR MULTICARRIER DS-CDMA SYSTEM WITH ANTENNA ARRAY-中国期刊网

摘要 Code-DivisionMultiple-Access(CDMA)systemsareinterferencelimited,andthereforeefficientinterferencemanagementisnecessarytoenhancetheperformanceofaCDMAsystem.Inthispaper,asuccessivebeamforming(spatialfiltering),lineardecorrelatingMultiUserDetection(MUD,temporalfiltering)anddiversityreceptionstructureforuplinkmulticarrierDirectSequenceCDMA(DS-CDMA)systemwithantennaarrayareproposed.Bybeamforming,theantennaarraysuppressesinterferenceaccordingtothedistinctarraysignature.Subsequently,lineardecorrelatingMUDisap-pliedtoseparatethesignalsofdifferentusersandeliminateMultipleAccessInterference(MAI).Finally,thedecorrelatedsignalsatdifferentsubcarriersthatbelongtothesameuserarecombinedtoachievefrequencydiversity.SimulationresultsshowthattheproposedstructureofferssignificantBitErrorRate(BER)performanceimprovementbysuccessivelyexploitingthespace-time-frequencyprocessing.

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SUCCESSIVE BEAMFORMING, MULTIUSER DETECTION AND DIVERSITY RECEPTION FOR MULTICARRIER DS-CDMA SYSTEM WITH ANTENNA ARRAY

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SUCCESSIVE BEAMFORMING, MULTIUSER DETECTION AND DIVERSITY RECEPTION FOR MULTICARRIER DS-CDMA SYSTEM WITH ANTENNA ARRAY

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