多用户CDMA系统中Turbo-BLAST迭代检测算法.pdf

246Vol.24No.6

200911JournalofDataAcquisitionProcessingNov.2009

:1004-9037(2009)06-0754-03

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CDMATurboBLAST

陈小敏徐大专虞湘宾朱秋明

(,,210016)

:将V-BLAST结构和CDMA技术相结合,构造了多用户CDMA系统模型,提出了一种联合多用户检测和

Turbo迭代思想的多用户检测算法该方案首先利用解相关算法对接收信号进行空时多用户检测,以去除用户

间干扰,然后再对期望用户的接收信号进行软干扰抵消迭代检测,以去除天线间干扰解相关后数据检测仅和单

个用户的天线数目有关,算法复杂度较低仿真结果表明,构造的空时多用户模型可使各用户检测相对独立,有

利于已有单用户Turbo-BLAST方案的应用

:空时多用户检测;-;软干扰抵消迭代检测

TurboBLAST

:TN911.22:A

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TurboBLASTIterativeDetectionSchemeforMultiuserCDMASystem

ChenXiaomin,XuDazhuan,YuXiangbin,ZhuQiuming

(CollegeofInformationScienceandTechnology,NanjingUniversityofAeronauticsAstronautics,

Nanjing,210016,China)

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AbstractAmultiuserCDMAsystemisconstructedbasedonVBLASTstructureandCDMA

technique,andaspace-timemulti-userdetectionalgorithmformulti-userTurbo-BLASTsys-

temisproposedbasedonthemulti-userdetectionalgorithmandTurbo-BLASTscheme.The

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proposeddecorrelationalgorithmisusedtoremovetheinterferenceamongmultiusersand

thenthemodifiediterativeinterferencecancellationschemeisusedfortheexpectationuserto

removetheinterferenceamongantennas.Thecomplexityofthedetectionalgorithmafterde-

correlationonlycorrelatedwithantennasnumbersoftheexpectationuser.Simulationresults

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showthattheproposedspacetime