A simplified MAP channel estimator for OFDM systems under Rayleigh fading

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dc.authoridCURUK, SELVA MURATOGLU/0000-0002-2195-7827
dc.contributor.authorCuruk, Selva Muratoglu
dc.contributor.authorTanik, Yalcin
dc.date.accessioned2024-09-18T21:01:56Z
dc.date.available2024-09-18T21:01:56Z
dc.date.issued2010
dc.departmentHatay Mustafa Kemal Üniversitesien_US
dc.description.abstractThis paper presents a simplified Maximum A Posteriori (SMAP) channel estimator to be used in orthogonal frequency division multiplexing (OFDM) systems under the Rayleigh fading assumption for the subchannels, using a parametric correlation model and assuming that the channel is frequency selective and slowly time varying. Expressions for the mean-square error (MSE) of estimations are derived to evaluate the performance of the estimator. The relation between the correlation of subchannels taps and error variance is investigated. Dependencies of the proposed estimator's performance on the correlation parameter estimation error and signal-to-noise ratios (SNR) estimation error are analysed. We provide approximations on the estimator algorithms in order to make the estimator practical. The simulations done using measured channel data show that the proposed estimator with approximations operates satisfactorily with negligible loss in performance. Finally, we investigate the symbol error rate (SER) performance of an OFDM system using quadrature phase-shift keying (QPSK) modulation, based on channel estimation modes (a) training sequence (b) decision feedback and (c) pilot subcarriers. The results have indicated that the proposed estimator performance is always better than maximum likelihood (ML) estimator, and as the subchannel correlation increases (large number of subcarriers) the performance comes very close to that of exactly known channel case. Copyright (C) 2010 John Wiley & Sons, Ltd.en_US
dc.identifier.doi10.1002/ett.1415
dc.identifier.endpage405en_US
dc.identifier.issn1124-318X
dc.identifier.issn1541-8251
dc.identifier.issue4en_US
dc.identifier.scopus2-s2.0-77953144624en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.startpage396en_US
dc.identifier.urihttps://doi.org/10.1002/ett.1415
dc.identifier.urihttps://hdl.handle.net/20.500.12483/13085
dc.identifier.volume21en_US
dc.identifier.wosWOS:000278761900009en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherWileyen_US
dc.relation.ispartofEuropean Transactions on Telecommunicationsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectDelay-Spreaden_US
dc.subjectErroren_US
dc.titleA simplified MAP channel estimator for OFDM systems under Rayleigh fadingen_US
dc.typeArticleen_US

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