| Fast Frequency Offset Acquisition and Accurate Tracking in OFDM Systems |
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| 作者姓名： | ZHANG Zhong-shan ZHAO Ming LIU Yuan-an |
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| 作者单位： | Wireless Communication Center，Beijing University of Posts and Telecommunications，Beijing 100876，P.R. China |
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| 基金项目： | ThisworkissupportedbytheResearchofWirelessTransportationTechniquesintheNextGenerationMobileCommunication (No.2 0 0 1AA1 2 1 0 31 ) . |
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| 摘 要： | 1 IntroductionOrthogonalFrequencyDivisionMultiplexing(OFDM )isaneffectivetransmissionschemetocombatmultipathfading1～ 2 ,1 7] .Byinsertingaguardintervalbetweensymbolblockscalledcyclicprefix,theInter SymbolInterference (ISI)canbemitigated .OFDMisadoptedasthemodulationschemeforaDigitalAudioBroadcasting (DAB)sys tem3] andAsymmetryDigitalSubscriberLoop(ADSL) 4] andisalso proposedastheterrestrialHDTVtransportinEurope5] .OFDMsystemisverysensitivetocarrierfre quencyoffset.Manymet…
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Fast Frequency Offset Acquisition and Accurate Tracking in OFDM Systems |
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| ZHANG Zhong-shan,ZHAO Ming,LIU Yuan-an.Fast Frequency Offset Acquisition and Accurate Tracking in OFDM Systems[J].The Journal of China Universities of Posts and Telecommunications,2004,11(1). |
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| Authors: | ZHANG Zhong-shan ZHAO Ming LIU Yuan-an |
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| Abstract: | A new carrier frequency offset estimation scheme for Orthogonal Frequency-Division Multiplexing (OFDM) systems is proposed. The carrier frequency offset estimation includes acquisition and tracking. The acquisition range of the proposed algorithm is as large as one half of the overall signal bandwidth. Comparison of the proposed scheme with Schmidl's algorithm by computer simulation illustrates the superior performance of the proposed scheme with regard to estimation accuracy in both AWGN channel and multipath channels. |
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| Keywords: | synchronization frequency offset estimation OFDM |
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