| Accurate and Simple Time Synchronization and Frequency Offset Correction in OFDM System |
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| 作者姓名： | LIU Xiao-ming JIANG Wei-yu LIU Yuan-an Wireless Communication Center Beijing University of Posts and Telecommunications Beijing P.R. China |
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| 作者单位： | LIU Xiao-ming，JIANG Wei-yu，LIU Yuan-an Wireless Communication Center，Beijing University of Posts and Telecommunications，Beijing 100876，P.R. China |
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| 摘 要： | 1 Introduction OFDMisaneffectivetransmissionschemetocopewithmultipathfading1] .Byinsertingaguardintervalbetweensymbolsblockscalledcyclicprefix ,theInterSymbolInterference (ISI)canbemitigated .OFDMwasadoptedasthemodulationschemeforaDigitalAu dioBroadcasting (DAB)system2 ] andisalsoproposedastheterrestrialHDTVtransportinEurope3] . SymboltimingoffsetsinOFDMreceiversnotonlyin troduceISIbutalsocauselinearphaserotationsofthesignalconstellationofthereceiverFastFourierTrans form (F…
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Accurate and Simple Time Synchronization and Frequency Offset Correction in OFDM System |
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| LIU Xiao-ming,JIANG Wei-yu,LIU Yuan-an Wireless Communication Center,Beijing University of Posts and Telecommunications,Beijing ,P.R. China.Accurate and Simple Time Synchronization and Frequency Offset Correction in OFDM System[J].The Journal of China Universities of Posts and Telecommunications,2004,11(3). |
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| Authors: | LIU Xiao-ming JIANG Wei-yu LIU Yuan-an |
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| Abstract: | We present a new synchronization scheme for Orthogonal Frequency-Division Multiplexing (OFDM) systems. In this scheme, time synchronization and carrier frequency offset correction can be performed in one identical training symbol. Time synchronization algorithm is robust and simple operated, and its performance is independent of the carrier frequency offset. We derive the theoretical variance error for our time synchronization algorithm in AWGN channel. We also derive the performance lower bound of our frequency offset correction algorithm. The frequency offset correction algorithm is high accuracy and its performance will degrade very little under multipath fading environment. |
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| Keywords: | synchronization frequency offset estimation |
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