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