| Maximum Likelihood Estimation of Clock Synchronization Error in OFDM System |
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| 作者姓名： | 崔小准 胡光锐 陈豪 |
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| 作者单位： | Department of Electronic Engineering，Shanghai Jiaotong University，Shanghai，200030，Dr，Department of Electronic Engineering，Shanghai Jiaotong University，Shanghai，200030，Xi'an Institute of Space Radio，Xi'an，710000 |
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| 摘 要： | IntroductionForhigh ratedatatransmission ,robustnessofimpulsenoise,andfastfrequencyselectivefading ,orthogonalfrequencydivisionmultiplexingmodulationhasbeenadoptedfordigitalvideobroadcastingforterrestrial1] andintegratedservicedigitalbroadcastingforterrestrial2 ] ,respectively .However,ascomparedtosingle carriersystems,OFDMsystemsaremoresensitivetocarrierfrequencyoffsetandclocksynchronizationerror,onlytheperfectsynchronizationbetweenthetransmitterandreceivercanassuretheindependencybetweenea…
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Maximum Likelihood Estimation of Clock Synchronization Error in OFDM System |
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| CUI Xiao-zhun,HU Guang-rui.Maximum Likelihood Estimation of Clock Synchronization Error in OFDM System[J].Journal of Donghua University,2004,21(4). |
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| Authors: | CUI Xiao-zhun HU Guang-rui |
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| Institution: | 1. Department of Electronic Engineering,Shanghai Jiaotong University,Shenghai ,200030
2. Xi'an Institute of Space Radio,Xi'an,710000 |
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| Abstract: | The performance degradation of an orthogonal frequency division multiplexing (OFDM) systems due to clock synchronization error is analyzed and a pilot-aided maximum likelihood (ML) estimating method is proposed to correct it. The proposed algorithm enables clock synchronization error estimation from a pilot whose duration is only two symbol periods. The study shows that this method is simple and exact. The clock synchronization error can be corrected almost entirely. |
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| Keywords: | Orthogonal frequency-division multiplexing clock synchronization error maximum likelihood estimator |
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