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单载频频域均衡的信道估计和频域均衡研究仿真20097287L0IDFT2.2.2CSICSI元(n),FFTCSIX(k),R(k)CS辅助数据信道捕获H(K)同步m)的TRA数据一跟踪CSI均衡F判决S重构X()FRC SIX1=(Xn…kXo=(Xn…NHo(k)=R(k)h=0,1,…;N-1(5)CSIUH re(le)Ul=2…,U-1;n=1,…,NCSI(7)(2)CSICSISG FDE率辅助数据块数据数据○ooo●○OOO●CP○oo●○●●0○o○●○o○○:(zero forcing, ZF)(m inimum mean square error, MMSE)ZEC(k)=;k=0,1,…,N-1(8)X(h)XHY= XH+ W=t wX(k)XuNH(b<1(6MMSEMMSENHhC(b=|H(b2+1SMPh=01..,N-1(9)HCS9U×N:H"(k)H()SNR19o1994-2012ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net2009728710MMSEMATLA B判决反馈MMSE均衡判决反馈ZF均衡ZF MMSE插值MMSE均衡U W插值ZF均衡UW+MMSE均衡W+ZF均衡61016SG FDEl . 8MHzSNR/dB(FT)—256CP(AWGN+A WGNawgn+SUL3[00.40.9]μs,SG FDE;[0-5-10dB0.5H:4AWGNAWGNMMSEZFMMSEZESGFDEZEMMSE ZFMMSE[1 ZENG YH, NGTSPilot cy clic prefix ed sin gle carrier co mmunication: channel est mation and equ aliz at ion[J]. Signal Processing Letters, IEEE, 2005, 12: 56-59[2ZESG FDE2003.12:3740.31 COLERI S, ERGEN M, PURI A, et al. Channel estimation techniques based on pilot arrangement in奇音OF DM systems[ J]. Broadcast ing, IEEE Trans actio nson.2002.48:223229[4 NEWMANN DJ AnLl external problem for polynomials[]. Proc. Amer. M ath. SoC, 1965, 16: 12871290[5 LI J F, DU Y Channel Estimation Schemes for SCFDE/FS System[ C]. ISCC 06, 2006[6 PROAKISJGM1.4号一判决反馈MMSE均衡判决反馈ZF均衡2003:4441468插值MMSE均衡[7 ERCEG V, GREENSTEIN L J An empirically bas ec插值ZF均衡UW+MMSE均衡path loss model for wireless channels in suburban err-eUW+ZF均衡68101a41618v ironments[J]. IEEE Journal on Selected Areas ofSNR/dBCommunications. 1999.17:12051211(AWGN20o1994-2012ChinaAcademicJournalElectronicPublishingHouseAllrightsreservedhttp://www.cnki.net
