CMA盲均衡在MIMO MC DS-CDMA系统中的应用研究.pdf

CMA盲均衡在MIMOMCDS-CDMA系统中的

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应用研究

居美艳,李黎,殷兴辉

(河海大学计算机及信息工程学院,南京210098)

:本文首先建立了采TR-STBC发送分集的MIMOMCDS-CDMA系统模型,然后

在此基础上,研究了SDCMA盲均衡在该系统中的应,最后进行了仿真和分析结论是对采

TR-STBC方案的MIMOMCDS-CDMA系统进行常模盲均衡,算法简单,较易实现,但当

多址干扰较大时,仅采此均衡方法不能较好地改善系统性能,还需要进一步采其他方法来

减小或消除多址干扰

:多载波直扩码分多址;多输入多输出;时间反转空时分组编码;常模算法

:TN911.5:A:2010)

TheStudofCMABlindEqualization

AppliedinMIMOMCDS-CDMASstems

JUMeian,LILi,YINXinghui

(CollegeofComputerandInformationEngineering,HohaiUniversit,Nanjing210098,China)

Abstract:Thispaperfirstbuildsupthemodelofthemultipleinputmultipleoutput(MIMO)multi

carrierdirectsequence-codedivisionmultipleaccess(MCDS-CDMA)sstemwithtmiereversal

space-tmieblockcoding(TR-STBC)transmitdiversit,basedonwhichtheapplicationofstee

pestdecreasingconstantmodulusalgorithm(SDCMA)forblindequalizationisstudied.Finallsmi

ulationsareperformedandtheconclusionsaregiven.Theconclusionsarethatblindequalizationof

constantmodulusalgorithm(CMA)haslowcomplexitandissmiplrealizedintheMIMOMCDS

-CDMAsstemwithTR-STBC,andhoweverCMAblindequalizationcantmiprovesstemper

formancewellwhenmultipleaccessinterference(MAI)isfairlsevere,soothermethodswhich

mitigateorelmiinateMAImustbeadopted.

Keywords:MCDS-CDMA;MIMO;TR-STBC;CMA

CDMAOFDMCDMA,

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