Channel Estimation in Underwater Cooperative Ofdm System With Amplify-And Relaying

dc.contributor.authorŞenol, Habib
dc.contributor.authorPanayırcı, Erdal
dc.contributor.authorErdoğan, Mustafa
dc.contributor.authorUysal, Murat
dc.date.accessioned2019-06-27T08:04:10Z
dc.date.available2019-06-27T08:04:10Z
dc.date.issued2012
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Bilgisayar Mühendisliği Bölümüen_US
dc.departmentFakülteler, Mühendislik ve Doğa Bilimleri Fakültesi, Elektrik-Elektronik Mühendisliği Bölümüen_US
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 presence 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 Gaussian mixture model an efficient and low complexity algorithm is developed based on the combinations of the MP and the space-alternating generalized expectation-maximization (SAGE) technique to 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.en_US]
dc.identifier.citation1
dc.identifier.doi10.1109/GLOCOM.2012.6503696en_US
dc.identifier.endpage3730
dc.identifier.isbn9781467309219
dc.identifier.isbn9781467309202
dc.identifier.issn2334-0983en_US
dc.identifier.issn2334-0983
dc.identifier.scopus2-s2.0-84877679185en_US
dc.identifier.startpage3725en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/902
dc.identifier.urihttps://doi.org/10.1109/GLOCOM.2012.6503696
dc.identifier.wosWOS:000322375104014en_US
dc.institutionauthorŞenol, Habiben_US
dc.institutionauthorŞenol, Habib
dc.institutionauthorErdoğan, Mustafaen_US
dc.institutionauthorPanayırcı, Erdal
dc.language.isoenen_US
dc.publisherIEEEen_US
dc.relation.journal2012 IEEE Global Communications Conference (GLOBECOM)en_US
dc.relation.publicationcategoryKonferans Öğesi - Uluslararası - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.titleChannel Estimation in Underwater Cooperative Ofdm System With Amplify-And Relayingen_US
dc.typeConference Objecten_US
dspace.entity.typePublication
relation.isAuthorOfPublication2c09cda4-9d83-4836-8695-b36fc6c9c4ec
relation.isAuthorOfPublication5371ab5d-9cd9-4d1f-8681-a65b3d5d6add
relation.isAuthorOfPublication.latestForDiscovery2c09cda4-9d83-4836-8695-b36fc6c9c4ec

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