基于复FastICA算法的STBC-DS-CDMA系统盲检测法.pdf

:FastICASTBCDSCDMA

基于复FastICA算法的STBCDSCDMA

系统盲检测法

1213

金凤,马宝红,王吉富,田军

(1.710106;2.400035;

3.710065)

:采用空时分组码的MIMOCDMA系统可以通过最大似然法检测信号,但其所需要的信道状态信息难以在接

收端精确估计在此提基于复FastICA算法的STBCDSCDMA系统盲检测方法,在不需要进行信道估计的情况下即可

分离提取源信号通过仿真比较可知,采用这种算法的STBCDSCDMA系统的误码率性能与理想信道估计下的最大似然

检测算法性能相当,并且不需要进行信道估计,节省了系统开销

:盲检测方法;空时分组码;CDMA;独立分量分析

:TP274:A:1004373X(2009)2212604

BlindDetectionAlgorithmofSTBCDSCDMASystemBasedonComplexvaluedFastICA

1213

JIFeng,MABaohong,WAGJifu,TIAJun

(1.XianCommunicationsInstitute,Xian,710106,China;2.ChongqingCommunicationsInstitute,Chongqing,400035,China;

3.XianTransportationManagementDepartment,Xian,710065,China)

Abstract:TheMultipleInputMultipleOutput(MIMO)CDMAsystembasedonspacetimeblockcodescandetectthe

transmittedsignalsbythemostlikelihooddetector.Buttheneededchannelstateinformationishardtoestimateaccuratelyon

thereceiver.AblinddetectionalgorithmbasedonthefastfixedpointICAalgorithmtocomplexvaluedsignalsfortheSTBC

DSCDMAsystemisproposed.WithoutanyCSI,thesourcesignalscanbeseparatedandabstracted.Bysimulationandcompar

ison,thebiterrorrateperformanceofthismethodwithoutanyCSIapproximatetotheconditionsunderperfectchannelstate

informationandresourceofthesystemissaved.

Keywords:blinddetectionmethod;spacetimeblockcodes;CDMA;independentcomponentanalysis

(Blind

0

SourceSeparation,BSS)

,(MultipleInput