文档介绍：一种有效的OFDM载波频率偏移的盲估计2009年第03期~~,,Totally~?$,%0FDM??%??黄晓宇C??I?,????导出了具有循环前缀(CP)和虚子载波的正交频分复用(OFDM)通信系统信号的数学模型。提出了基于PM-[?]4111043ESPRIT算法的OFDM系统载波频率偏移(CFO)偏移不变性的估计算法。经过粗略估计,该算法可以同时获得频率偏移和包含信道信息的矩阵,它们均有利于接收信号的偏移补偿和解调。仿真结果说明了该方法是有效的。[}%?]载波频率偏移;盲估计;PM-ESPRIT算法;正交频分复用[$‰?,,,?][@??,,[@øщ?]1002-0802(2009)03-0051-03A?]AnEffectiveB1indE›timationof0FDMCarrierFrequency0ff›etHUANGXiao-yu(HunanIn›tituteofEngineering,×iangtanHunan411104,Ckina)[Ab›tract]Tkematkematicmode1oftke›igna1oftke0rtkogona1FrequencyDivi›ionMu1tip1e×munication›y›tem›witkcyc1icprefi×(CP)andvirtua1›ubcarrier›i››timationa1goritkmfor›kift–invarianceoftkecarrierfrequencyoff›et(CF0)in0FDM›y›temba›edonPM–ESPRITmetkodi›propo››timation,tki›a1goritkmcou1d›imu1taneou›1yacquiretkefrequencyoff›etandmatri×inc1udingckanne1information,wkickarefavorab1eforoff›pen›ationanddemodu1ationoftkereceived›igna1›.Simu1ationre›u1t›indicatetkattki›a1goritkmi›effectiveandpracticab1e.[Keyword›]carrierfrequencyoff›et;b1inde›timation;PM–ESPRITa1goritkm;0FDM0引言1信号模型‰?K???(CarrierFrequencyOffset,CFO)?Ç??TP???,,?/Q?}OFDM?????},f%,fi??G-IDFT?o%sk,,bk,bk,…,bk,,,,,,,01P1,??,,,%}%$oƒ,,(G>P)‰?,Gs,‰y%????}?yyÇ??o,,[1][2]MUSIC{?ESPRIT{?%OFDMfiCFO???k%,?%$,%CFO??%?o?f,?????G?Ç??$,%y???‰$P?Ç?G-P?Ç??,,??o??(EstimationofSignalParameter?%?$?ƒ,???:?%LRayleighFIR,‰???$?fi%Ø????Rotation