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dc.contributor.authorPanayırcı, Erdaltr_TR
dc.contributor.authorÇırpan, Hakan Alitr_TR
dc.date.accessioned2015-07-14T23:48:29Z
dc.date.available2015-07-14T23:48:29Z
dc.date.issued2002
dc.identifier.isbn0792376536
dc.identifier.otherWOS:000176017300032
dc.identifier.urihttp://hdl.handle.net/11729/680
dc.description.abstractIn this paper, a computationally efficient algorithm is presented for maximum a posteriori (MAP) channel estimation for OFDM systems employing M-PSK modulation scheme with additive Gaussian noise, based on the Expectation Maximization (EM) method. A non-data-aided scheme is considered for the estimation of a multipath time-varying channel by averaging over the M-PSK signal constellation. For this, an EM algorithm is derived which estimates the complex channel parameters of each subcarriers iteratively in frequency domain and which converges to the true MAP estimation of the Unknown channel, The algorithm requires a convenient representation of die discrete multipath fading channel based on the Karhumen-Loeve orthogonal expansion. The algorithm is applied to the QPSK modulated OFDM systems and efficiency of the method proposed is shown by the computer simulations.en_US
dc.language.isoenen_US
dc.publisherKLUWER ACADEMIC PUBLISHERSen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.source3rd International Workshop on Multi-Carrier Spread-Spectrum and Related Topicsen_US
dc.titleNon-data aided EM-based channel estimation for OFDM systems with time-varying fading channelsen_US
dc.typeconferenceObjecten_US
dc.description.versionPublisher's Versionen_US
dc.contributor.departmentIsik University, Faculty of Engineering, Department of Electrical-Electronics Engineeringen_US
dc.contributor.departmentIşık Üniversitesi, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümütr_TR
dc.contributor.authorIDTR10331
dc.contributor.authorIDTR36844
dc.identifier.startpage293
dc.identifier.endpage301
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US


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