Joint Channel Estimation Equalization and Data Detection for OFDM Systems in the Presence of Very High Mobility

dc.contributor.authorŞenol, Habib
dc.contributor.authorPanayırcı, Erdal
dc.contributor.authorPoor, H. Vincent
dc.date.accessioned2019-06-27T08:05:11Z
dc.date.available2019-06-27T08:05:11Z
dc.date.issued2010
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 the challenging and timely problem of joint channel estimation equalization and data detection for uplink orthogonal frequency division multiplexing (OFDM) systems in the presence of frequency selective and very rapidly time varying channels. The resulting algorithm is based on the space alternating generalized expectation maximization (SAGE) technique which is particularly well suited to multicarrier signal formats leading to a receiver structure that also incorporates interchannel interference (ICI) cancelation. In order to reduce the computational complexity of the algorithm band-limited discrete cosine orthogonal basis functions are employed to represent the rapidly time-varying fading channel by the discrete cosine serial expansion coefficients. It is shown that depending on the normalized Doppler frequency only a small number of expansion coefficients is sufficient to approximate the channel perfectly and there is no need to know the correlation function of the input signal. In this way the resulting reduced dimensional channel coefficients are estimated and the data symbols detected iteratively with tractable complexity. The proposed SAGE joint detection algorithm updates the data sequences serially and the channel parameters are updated in parallel leading to a receiver structure that also incorporates ICI cancelation. Computer simulations show that the cosine transformation represents the time-varying channel very effectively and the proposed algorithm has excellent symbol error rate and channel estimation performance even with a very small number of channel expansion coefficients employed in the algorithm resulting in substantial reduction of the computational complexity.en_US]
dc.identifier.citation76
dc.identifier.doi10.1109/TSP.2010.2048317en_US
dc.identifier.endpage4238
dc.identifier.issn1053-587Xen_US
dc.identifier.issn1053-587X
dc.identifier.issue8
dc.identifier.scopus2-s2.0-77954596177en_US
dc.identifier.scopusqualityN/A
dc.identifier.startpage4225en_US
dc.identifier.urihttps://hdl.handle.net/20.500.12469/1041
dc.identifier.urihttps://doi.org/10.1109/TSP.2010.2048317
dc.identifier.volume58en_US
dc.identifier.wosWOS:000282087000021en_US
dc.identifier.wosqualityQ1
dc.institutionauthorPanayırcı, Erdalen_US
dc.institutionauthorŞenol, Habiben_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.subjectIntercarrier interference suppressionen_US
dc.subjectJoint data detection and channel estimationen_US
dc.subjectOrthogonal frequency-division multiplexing (OFDM)en_US
dc.subjectRapidly varying wireless channelsen_US
dc.subjectSpace alternating generalized expectation maximization (SAGE) algorithmen_US
dc.titleJoint Channel Estimation Equalization and Data Detection for OFDM Systems in the Presence of Very High Mobilityen_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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