Sparse Channel Estimation and Equalization for OFDM-Based Underwater Cooperative Systemsw with Amplify-and-Forward Relaying

dc.contributor.authorŞenol, Habib
dc.contributor.authorPanayırcı, Erdal
dc.contributor.authorUysal, Murat
dc.contributor.authorPoor, H. Vincent
dc.date.accessioned2019-06-27T08:02:07Z
dc.date.available2019-06-27T08:02:07Z
dc.date.issued2016
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 and equalization for amplify-and-forward cooperative relay based orthogonal frequency division multi-plexing (OFDM) systems in sparse underwater acoustic (UWA) channels. The sparseness of the channel impulse response and prior information for the non-Gaussian channel gains modeled by an exact continuous Gaussian mixture (CGM) are exploited to improve the performance of the channel estimation algorithm. The resulting novel algorithm initially estimates the overall sparse complex-valued channel taps from the source to the destination as well as their locations using the matching pursuit (MP) approach. The effective time-domain non-Gaussian noise is approximated well as a Gaussian noise in the frequency-domain where the estimation takes place. An efficient and low complexity algorithm is developed based on a combination of the MP and the maximum a posteriori probability (MAP) based space-alternating generalized expectation-maximization technique to improve the estimates of the channel taps and their locations in an iterative manner. Computer simulations show that the UWA channel is estimated very effectively and the proposed algorithm exhibits excellent symbol error rate and channel estimation performance.en_US]
dc.identifier.citation32
dc.identifier.doi10.1109/TSP.2015.2477807en_US
dc.identifier.endpage228
dc.identifier.issn1053-587Xen_US
dc.identifier.issn1941-0476en_US
dc.identifier.issn1053-587X
dc.identifier.issn1941-0476
dc.identifier.issue1
dc.identifier.scopus2-s2.0-85009351657en_US
dc.identifier.scopusqualityQ1
dc.identifier.startpage214en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/551
dc.identifier.urihttps://doi.org/10.1109/TSP.2015.2477807
dc.identifier.volume64en_US
dc.identifier.wosWOS:000366834300016en_US
dc.identifier.wosqualityQ1
dc.institutionauthorPanayırcı, Erdalen_US
dc.language.isoenen_US
dc.publisherIEEE-INST Electrical Electronics Engineers Incen_US
dc.relation.journalIEEE Transactions on Signal Processingen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectAF relayingen_US
dc.subjectContinuous Gaussian Mixtureen_US
dc.subjectMatching Pursuiten_US
dc.subjectOFDMen_US
dc.subjectSageen_US
dc.subjectUnderwater Acoustic Channel Estimationen_US
dc.titleSparse Channel Estimation and Equalization for OFDM-Based Underwater Cooperative Systemsw with Amplify-and-Forward Relayingen_US
dc.typeArticleen_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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