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dc.contributor.authorÇırpan, Hakan Alitr_TR
dc.contributor.authorPanayırcı, Erdaltr_TR
dc.contributor.authorDoğan, Hakantr_TR
dc.date.accessioned2015-01-15T23:00:08Z
dc.date.available2015-01-15T23:00:08Z
dc.date.issued2004-06
dc.identifier.citationÇırpan, H. A., Panayırcı, E., & Doğan, H. (2004). Iterative channel estimation approach for space‐time/frequency coded OFDM systems with transmitter diversity. European Transactions on Telecommunications, 15(3), 235-248. doi:10.1002/ett.969en_US
dc.identifier.issn1120-3862
dc.identifier.otherWOS:000222397300009
dc.identifier.urihttp://hdl.handle.net/11729/156
dc.identifier.urihttp://dx.doi.org/10.1002/ett.969
dc.description.abstractFocusing on transmit diversity orthogonal frequency division multiplexing (OFDM) transmission through frequency selective channels, this paper pursues novel iterative channel estimation approaches for both space-frequency OFDM (SF-OFDM) and space-time OFDM (ST-OFDM) systems. Relying on the unifying signal model for SF-OFDM and ST-OFDM transmitter diversity systems, we develop computationally efficient, maximum a posteriori (MAP) channel estimation algorithms according to the MAP criterion. The algorithms require a convenient representation of the discrete multipath fading channel based on the Karhunen-Loeve (KL) orthogonal expansion and estimates the complex channel parameters of each subcarriers iteratively using the expectation-maximisation (EM) method. In order to explore the performance, the closed-form expression for the average symbol error rate (SER) probability is derived for the maximum ratio combiner (MRC). Furthermore, to benchmark performance of the MAP channel estimator, the modified Cramer-Rao bound of channel estimates is also derived. Finally, we provide simulation results studying the influence of delay spread, propagation parameters and modelling mismatch on the performance of channel estimation techniques. Simulation results confirm our theoretical analysis and illustrate that the proposed algorithms are capable of tracking fast fading and improving overall performance.en_US
dc.language.isoen
dc.publisherAssoc Elettrotecnica Ed Elettronica Italianaen_US
dc.relation.isversionof10.1002/ett.969
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.sourceEuropean Transactions on Telecommunicationsen_US
dc.subjectMaximum-likelihooden_US
dc.subjectFading channelsen_US
dc.subjectExpansionen_US
dc.titleIterative channel estimation approach for space-time/frequency coded OFDM systems with transmitter diversityen_US
dc.typearticleen_US
dc.description.versionPublisher's Versionen_US
dc.contributor.departmentIşık Üniversitesi, Mühendislik Fakültesi, Elektrik-Elektronik Mühendisliği Bölümütr_TR
dc.contributor.departmentIsik University, Faculty of Engineering, Department of Electrical-Electronics Engineeringen_US
dc.contributor.authorIDTR10331
dc.contributor.authorIDTR115037
dc.contributor.authorIDTR36844
dc.identifier.volume15
dc.identifier.issue3
dc.identifier.startpage235
dc.identifier.endpage248
dc.peerreviewedYesen_US
dc.publicationstatusPublisheden_US


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