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Estimation of CFO and Channels in Phase-Shift Orthogonal Pilot-Aided OFDM Systems with Transmitter Diversity

2009-03-03Journal article Open access
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dc.contributor.authorRibeiro, Carlos
dc.contributor.authorGameiro, Atílio
dc.contributor.authorRibeiro, Carlos
dc.date.accessioned2025-04-23T11:43:39Z
dc.date.available2025-04-23T11:43:39Z
dc.date.issued2009-03-03
dc.descriptionArticle number 436756
dc.description.abstractWe present a CFO estimation algorithm and an associated channel estimation method for broadband OFDM systems with transmitter diversity. The CFO estimation algorithm explores the TD structure of the transmitted symbols carrying pilots and data, relying solely on the data component present on the symbols to estimate the CFO, thus avoiding additional overhead like training symbols or null subcarriers. An intermediate output of the CFO algorithm provides an easy-to-get initial CIR estimate that will be improved with the utilization of a TD LMMSE filter. The feasibility of the investigated methods is substantiated by system simulation using indoor and outdoor broadband wireless channel models. Simulation results show that the joint algorithms provide a near optimal system’s performance.eng
dc.description.sponsorshipThe authors wish to thank Fundação para a Ciência e a Tecnologia that partially supported this work through the project “PHOTON—Distributed and Extendible Heterogeneous Radio Architectures using Fibre Optic Networks” (PTDC/EEA-TEL/72890/2006).
dc.identifier.citationRibeiro, C., Gameiro, A. Estimation of CFO and Channels in Phase-Shift Orthogonal Pilot-Aided OFDM Systems with Transmitter Diversity. J Wireless Com Network 2009, 436756 (2009). https://doi.org/10.1155/2009/436756.
dc.identifier.doi10.1155/2009/436756
dc.identifier.eissn1687-1499
dc.identifier.issn1687-1472
dc.identifier.urihttp://hdl.handle.net/10400.8/12831
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer Nature
dc.relationPTDC/EEA-TEL/72890/2006
dc.relation.hasversionhttps://jwcn-eurasipjournals.springeropen.com/articles/10.1155/2009/436756
dc.relation.ispartofEURASIP Journal on Wireless Communications and Networking
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectChannel Estimation
dc.subjectCarrier Frequency Offset
dc.subjectCyclic Prefix
dc.subjectChannel Impulse Response
dc.subjectOFDM System
dc.titleEstimation of CFO and Channels in Phase-Shift Orthogonal Pilot-Aided OFDM Systems with Transmitter Diversityeng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage10
oaire.citation.issue1
oaire.citation.startPage1
oaire.citation.titleEURASIP Journal on Wireless Communications and Networking
oaire.citation.volume2009
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameRibeiro
person.givenNameCarlos
person.identifier.orcid0000-0001-7484-6779
relation.isAuthorOfPublicationa388f639-664e-435c-8e1a-d6aee9213f70
relation.isAuthorOfPublication.latestForDiscoverya388f639-664e-435c-8e1a-d6aee9213f70

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We present a CFO estimation algorithm and an associated channel estimation method for broadband OFDM systems with transmitter diversity. The CFO estimation algorithm explores the TD structure of the transmitted symbols carrying pilots and data, relying solely on the data component present on the symbols to estimate the CFO, thus avoiding additional overhead like training symbols or null subcarriers. An intermediate output of the CFO algorithm provides an easy-to-get initial CIR estimate that will be improved with the utilization of a TD LMMSE filter. The feasibility of the investigated methods is substantiated by system simulation using indoor and outdoor broadband wireless channel models. Simulation results show that the joint algorithms provide a near optimal system’s performance.
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