SC-FDE系统的频域均衡器设计

346200711()JournalofZhejiangUniversity(ScienceEdition):2006207205.:(No.Y104008).:(1966-),,,.SC2FDE1,2,2,2(1.,321017;2.,310028):(SC2FDE),SC2FDE:2OFDM.SUI23SUI25Matlab,.:SC2FDE;;B3G/4G:TN914.3:A:1008-9497(2007)06-640-04TANGJin2hua1,CHENChen2,CHENWen2zheng2,CHENXie2xiong2(1.InformationEngineeringCollege,JinhuaCollegeofProfessionandTechnology,Jinhua321017China;2.DepartmentofInformationandElec2tronicEngineering,ZhejiangUniversity,Hangzhou310028,China)EqualizerdesigninfrequencydomainofSC2FDEsystem.JournalofZhejiangUniversity(ScienceEdition),2007,34(6):640643Abstract:Havingintroducedthedistinguishingfeatureandmechanismofsingle2carrierwithfrequencydomainequal2izer(SC2FDE)system,severalkindsofequalizerstructureinfrequencydomainwhicharesuitableforSC2FDEsys2temareproposed,suchaszeroforcingequalizer,minimummeansquareerrorequalizer,leastsquareequalizer,mini2mummeansquareerror2decisionfeedbackequalizer,adaptivefrequencydomainequalizerandadaptiveequalizerwiththesignalprocessingmethodbyOFDM.Furthermore,byusingperformancesimulationsonMatlabplatformunderSUI23andSUI25channelsrespectively,thoseequalizersarecomparedandsomemeaningfulconclusionshavebeenmade.Keywords:SC2FDE;equalizer;B3G/4G(B3G/4G)[1]:(1)20Mbps,2Mbps;(2)3G510,3G;(3)3G;(4),;(5)3G.B3G/4G3G,ISI.ISI,,,(OFDM).OFDM[2],,,.OFDM:(1),,1%30dB;(2)PAPR,,,.©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(SC2FDE:SingleCarrierModulationwithFrequen2cyDomainEqualization).SC2FDEOFDM,(OFDM),,3[2,46]:(1)OFDM,PAPR,,,;(2),,;(3)OFDM,OFDM.SC2FDEOFDM,,,IEEE802.16[2].SC2FDEB3G/4G,OFDM,.SC2FDE.1SC2FDESC2FDE,.SC2FDE1,FFTIFFT//.:N0,Ng,N;,,,,,..1SC2FDEFig.1TheblockdiagramofSC2FDEsystemNxn(),h(n),,yn=hnáxn+vn,n=0,1,,N-1.(1),vn(AWGN),2n,,á.FFT,Yk=XkHk+Vk,k=0,1,,N-1.(2),HkVk,,:Zk=WkYkHk+WkVk,(3)Wk,:zn=1NN-1k=0WkYkHkej2Nkn+1NN-1k=0WkVkej2Nkn.(4)2SC2FDE,,.SC2FDE.,[7],SC2FDE.2.1(ZF),2.2ZFFig.2ThestructureblockdiagramofZFequalizerWk=DkYk.,,.2.2(MMSE),MMSEWk=H3k|Hk|2+2n/P,(5),H3kHk,n2,P.,ZF.2.3(LS)MMSE,,LSn2P.LSWk=H3kUk,(6)1466,:SC2FDE©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.=EYkY3k|Dk|2,Hk=EYkDk.(7)E[.].2.4(MMSE2DFE)(3),.zn=1NN-1k=0WkYkej2Nkn-fkx^n-k.(8),,.2.5(LMS)(LS)(RLS).3Fig.3ThestructureblockdiagramofMMSE2DFESC2FDE(),,W(l+1)k=Wlk-2Elk(Ylk)3,(9),(l),Eken.,,.SC2FDE,UW(UniqueWord).UW,UW,,.LMS4.4LMSFig.4TheblockdiagramofadaptiveequalizerwithLMScriterionLMS,OFDM,,5.5OFDMFig.5TheblockdiagramofadaptiveequalizerwiththesamesignalprocessingasOFDM3Matlab.3.1UW,256,UW32,1000.,UW.:2.5MHz;0.4s;10Mbps;FFT256;7.875MHz;QPSK16QAM.SUI,IEEE802.16SUI6,6SUI21SUI26,SUI23SUI25,AWGN.3.2,67.67,SUI25SUI235dB.,,LSZF,,;DFE,.,:DFE%LS%ZF,.246()34©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.():,,.(References):[1]FALCONERD.Beyond3GChallenge[J/OL].[2004201211].onlineavailableat:[2]FALCONERD,ARIYAVISITAKULSL.Frequencydomainequalizationfor2211GHzbroadbandwirelesssystems[J/OL].[2001201218]IEEE802.16,Docu2mentNumber:IEEE80216t201/01,onlineavailableat:[3]NEERV,PRASADR.OFDMforWirelessMultime2diaCommunications[M].London:ArtechHouse,2000.[4]FALCONERD,ARIYAVISITAKULSL,BENY2AMINA,etal.Frequencydomainequalizationforsingle2carrierbroadbandwirelesssystems.WhitePa2per[J/OL].[2002202215].onlineavailableat:[5]HUEMERM,KOPPLERA,WEIGELR,etal.Areviewofcyclicallyextendedsinglecarriertransmissionwithfrequencydomainequalizationforbroadbandwirelesstransmission[J].EuroTransTelecomms,2003,(14):3292341.[6],,.OFDM[J].,2002,32(2):1512155.SONGTie2cheng,YOUXiao2hu,SHENGLian2feng.Highratesinglecarriersystembasedonthesignalpro2cessingmethodofOFDMsystem[J].JournalofSouth2eastUniversity,2002,32(2):1512155.[7]PROAKISJG.DigitalCommunication[M].ThirdE2dition.NewYork:McGraw2Hill,1995.()3466,:SC2FDE©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.