A new algorithm for joint time and phase synchronization in OFDM systems

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dc.authorid0000-0001-7328-6626
dc.contributor.authorPanayırcı, Erdalen_US
dc.date.accessioned2015-07-14T23:48:29Z
dc.date.available2015-07-14T23:48:29Z
dc.date.issued2000
dc.departmentIşık Üniversitesi, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
dc.departmentIşık University, Faculty of Engineering, Department of Electrical-Electronics Engineeringen_US
dc.description.abstractIn this paper, a computationally efficient algorithm is presented for joint maximum likelihood (ML) timing and carrier phase synchronization of OFDM systems employing M-PSK modulation scheme with additive Gaussian noise, based on the Expectation-Maximization (EM) method. A nondata-aided(NDA) scheme is considered for the joint timing and phase synchronizer which maximizes the low SNR limit of the likelihood function averaged over the MPSK signal constellation. For this, an EM algorithm is derived which estimates the timing offset and the phase rotations of each subcarrier iteratively and which converges to the true ML estimation of the unknown timing and phase. It is shown that the algorithm becomes independent of the signal-to-noise ratio for both low and high SNR cases. The algorithm is applied to the QPSK modulated OFDM systems and-it is concluded that for SNR values greater than 10 dB the convergence is achieved in first iteration and for SNR values less than 10 dB, at most in three iterations. It is also concluded that the convergence is independent of the initial starting points.en_US
dc.description.sponsorshipIEEEen_US
dc.description.sponsorshipNokiaen_US
dc.description.sponsorshipToshibaen_US
dc.description.versionPublisher's Versionen_US
dc.identifier.citationPanayırcı, E. (2000). A new algorithm for joint time and phase synchronization in OFDM systems. Paper presented at the 11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525), 819-823. doi:10.1109/PIMRC.2000.881536en_US
dc.identifier.endpage823
dc.identifier.isbn0780364635
dc.identifier.scopus2-s2.0-0034444811
dc.identifier.scopusqualityN/A
dc.identifier.startpage819
dc.identifier.urihttps://hdl.handle.net/11729/691
dc.identifier.urihttp://dx.doi.org/10.1109/PIMRC.2000.881536
dc.identifier.volume2
dc.identifier.wosWOS:000168410200155
dc.identifier.wosqualityN/A
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakConference Proceedings Citation Index – Science (CPCI-S)en_US
dc.institutionauthorPanayırcı, Erdalen_US
dc.institutionauthorid0000-0001-7328-6626
dc.language.isoenen_US
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US
dc.publisherIEEEen_US
dc.relation.ispartof11th IEEE International Symposium on Personal Indoor and Mobile Radio Communications. PIMRC 2000. Proceedings (Cat. No.00TH8525)en_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAdditive noiseen_US
dc.subjectConvergenceen_US
dc.subjectGaussian noiseen_US
dc.subjectIterative algorithmsen_US
dc.subjectMaximum likelihood estimationen_US
dc.subjectOFDM modulationen_US
dc.subjectPhase estimationen_US
dc.subjectPhase modulationen_US
dc.subjectSignal to noise ratioen_US
dc.subjectTimingen_US
dc.subjectEM algorithmen_US
dc.subjectM-PSK modulationen_US
dc.subjectM-PSK signal constellationen_US
dc.subjectML estimationen_US
dc.subjectOFDM systemsen_US
dc.subjectQPSKen_US
dc.subjectSNR limiten_US
dc.subjectAdditive Gaussian noiseen_US
dc.subjectCarrier phase estimationen_US
dc.subjectCarrier phase synchronizationen_US
dc.subjectComputationally efficient algorithmen_US
dc.subjectExpectation-maximization methoden_US
dc.subjectFading channelen_US
dc.subjectJoint time/phase synchronizationen_US
dc.subjectLikelihood functionen_US
dc.subjectMaximum likelihood timing synchronisationen_US
dc.subjectMobile channelen_US
dc.subjectMultipathen_US
dc.subjectNondata-aided schemeen_US
dc.subjectPhase rotationsen_US
dc.subjectTiming offseten_US
dc.subjectConvergence of numerical methodsen_US
dc.subjectLand mobile radioen_US
dc.subjectMultipath channelsen_US
dc.subjectOptimisationen_US
dc.subjectPhase shift keyingen_US
dc.subjectSynchronisationen_US
dc.titleA new algorithm for joint time and phase synchronization in OFDM systemsen_US
dc.typeConference Objecten_US
dspace.entity.typePublication

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