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时间:2020-04-21
《重叠保留最小均方误差块线性均衡和块噪声预测算法.pdf》由会员上传分享,免费在线阅读,更多相关内容在应用文档-天天文库。
1、!44"!8#!"#$%&&'Vol.44№82010$8%JOURNALOFXI′ANJIAOTONGUNIVERSITYAug.2010!"#$%&'()*+,-'./+012345-.,345,QR(STUVWFXYZ[Z[T]9IJ^N_`a,710049,ST)67:()*+,-./0123456789:2;<=,>?@789:AB.CDEFGH./IFJKLM2NO2.PQRGH./0S,TUVWXYZP[]^_,`a@Pb6789:2ScdTeJK,fghiDjklGPmnJop-qrstuv.PwxyMS,h6FJKLM*z{789:2,
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3、H./0,~789:256,iImH;7U.¡,2NO2;DjklGPmnJop-qr?¢£,}g¤qh6789:2;mO2o,w¥¦T%§1dBI0.3dB;nJo¨©.89::789:2;JKLM;GH./;<=>?:TN911.7@ABCD:A@EF?:0253?987X(2010)08?0068?04犗狏犲狉犾犪狆犛犪狏犲犕犻狀犻犿狌犿犕犲犪狀犛狇狌犪狉犲犈狉狉狅狉犅犾狅犮犽犔犻狀犲犪狉犈狇狌犪犾犻狕犪狋犻狅狀犪狀犱犅犾狅犮犽犖狅犻狊犲犘狉犲犱犻犮狋犻狅狀犃犾犵狅狉犻狋犺犿狊FENGAng,YINQinye,HANWei(MOEKeyLabforIntelligentNet
4、worksandNetworkSecurity,Xi′anJiaotongUniversity,Xi′an710049,China)犃犫狊狋狉犪犮狋:Focusingontheproblemthattheoverlapsavemethodcannotbedirectlyappliedintheconventionalfrequencydomainequalizations,twoschemesofblocklinearequalizationandblocknoisepredictiontooverlapsaveminimummeansquareerror(MMSE)arep
5、roposed.Inthedesignofthelinearequalizer,theeffectivetapsarerestrictedwithinapredefinedrangetoavoidinducingcolorednoiseswhenoverlapsavemethodisused.Asaresult,thedistortionofbiterrorratecurvewillnotappearinthehighsignaltonoiseratio(SNR)area.Theblocknoisepredictionisappliedinthelayereddetection
6、tocombinetheoverlapsavemethod.Therefore,thefeedforwardfilterandthefeedbackfiltercanbedividedintotwoindependentblocks,andthefeedforwardfilterisexactlythesameasthelinearequalizer.Then,theoverlapsaveisemployedbythefeedforwardfilter,achievingbothlowcomplexityandhighperformance.Simulationresults
7、showthatbiterrorratecurvesoftheproposedschemesdonotreboundinthehighSNRarea,theoverlapsaveMMSEblocklinearequalizationhasonlyaround1dBSNRlosscomparedwiththefastMMSEblocklinearequalization,andthattheoverlapsaveMMSEblocknoisepredictionhasonlyaround0.3dBSNRlosscomparedwiththefastMMSEblockdecisio
8、nfeedbackequalization.犓犲狔狑狅狉犱狊:overlapsave;noiseprediction;linearequalization[1?3]bcdefgh,cijcik(MIMO)lmK.[4]kc}&,nop(SCM)7qrstuvwxy(ISI)zc{MMSEe(FMMSEBLE)
9、y(MAI)}~,&}zMMSE(FMMSE&'(#:2010?01?13.)*+,:-.(1979-),/,012;3
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