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dc.contributor.authorŞenol, H.
dc.contributor.authorPanayırcı, E.
dc.contributor.authorErdoğan, M.
dc.contributor.authorUysal, Murat
dc.date.accessioned2016-02-15T13:38:37Z
dc.date.available2016-02-15T13:38:37Z
dc.date.issued2012
dc.identifier.isbn978-1-4673-0920-2
dc.identifier.urihttp://hdl.handle.net/10679/2411
dc.identifier.urihttp://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=6503696
dc.descriptionDue to copyright restrictions, the access to the full text of this article is only available via subscription.
dc.description.abstractThis paper is concerned with a challenging problem of channel estimation for amplify-and-forward cooperative relay based orthogonal frequency division multiplexing (OFDM) systems in the resence of sparse underwater acoustic channels and of the correlative non-Gaussian noise. We exploit the sparse structure of the channel impulse response to improve the performance of the channel estimation algorithm, due to the reduced number of taps to be estimated. The resulting novel algorithm initially estimates the overall sparse channel taps from the source to the destination as well as their locations using the matching pursuit (MP) approach. The correlated non-Gaussian effective noise is modeled as a Gaussian mixture. Based on the aussian mixture model, an efficient and low complexity algorithm is developed based on the combinations of the MP and the space-alternating generalized improve the estimates of the channel taps and their location as well as the noise distribution parameters in an iterative way. The proposed SAGE algorithm is designed in such a way that, by choosing the admissible hidden data properly on which the SAGE algorithm relies, a subset of parameters is updated for analytical tractability and the remaining parameters for faster convergence Computer simulations show that underwater acoustic (UWA) channel is estimated very effectively and the proposed algorithm has excellent symbol error rate and channel estimation performance.
dc.description.sponsorshipTÜBİTAK
dc.language.isoengen_US
dc.publisherIEEE
dc.relationinfo:turkey/grantAgreement/TUBITAK/110E092
dc.relation.ispartofGlobal Communications Conference (GLOBECOM), 2012 IEEE
dc.rightsrestrictedAccess
dc.titleChannel estimation in underwater cooperative OFDM system with amplify-and-forward relayingen_US
dc.typeConference paperen_US
dc.peerreviewedyes
dc.publicationstatuspublisheden_US
dc.contributor.departmentÖzyeğin University
dc.contributor.authorID124615
dc.contributor.ozuauthorUysal, Murat
dc.identifier.startpage3725
dc.identifier.endpage3730
dc.identifier.wosWOS:000322375104014
dc.identifier.doi10.1109/GLOCOM.2012.6503696
dc.subject.keywordsAcoustic channels
dc.subject.keywordsCommunication
dc.subject.keywordsEqualization
dc.subject.keywordsDiversity
dc.identifier.scopusSCOPUS:2-s2.0-84877679185


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