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Effects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay-Based Networks

2010-11-14Journal article Open access
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datacite.subject.fosCiências Naturais::Ciências da Computação e da Informação
datacite.subject.sdg03:Saúde de Qualidade
datacite.subject.sdg10:Reduzir as Desigualdades
datacite.subject.sdg11:Cidades e Comunidades Sustentáveis
dc.contributor.authorJiménez, Víctor P. Gil
dc.contributor.authorRibeiro, Carlos
dc.contributor.authorGameiro, Atilio
dc.contributor.authorArmada, Ana García
dc.date.accessioned2025-10-31T13:19:38Z
dc.date.available2025-10-31T13:19:38Z
dc.date.issued2010-11-14
dc.description.abstractA practical multiuser cooperative transmission scheme denoted as Virtual Maximum Ratio Transmission (VMRT) for multiple-input multiple-output-orthogonal frequency division multiple access (MIMO-OFDMA) relay-based networks is proposed and evaluated in the presence of a realistic channel estimation algorithm and using low-density parity-check (LDPC) codes. It is shown that this scheme is robust against channel estimation errors. It offers diversity and array gain, keeping the complexity low with a multiuser and multiantenna channel estimation algorithm that is simple and efficient. In addition, the combination with LDPC codes provides improved gains; diversity gains larger than 6dB can be easily obtained with a reduced number of relays. Thus, this scheme can be used to extend coverage or increase system throughput by using simple cooperative OFDMA-based relays.eng
dc.description.sponsorshipThe authors would like to thank Jae-Yun Ko for his valuable help at the beginning of our work. This work has been partly funded by the projects MULTIADAPTIVE (TEC2008-06327-C03-02), COMONSENS (CSD2008-00010) and CODIV (ICT-2007-215477).
dc.identifier.citationGil Jiménez, V.P., Ribeiro, C., Gameiro, A. et al. Effects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay-Based Networks. J Wireless Com Network 2010, 764784 (2010). https://doi.org/10.1155/2010/764784.
dc.identifier.doi10.1155/2010/764784
dc.identifier.eissn1687-1499
dc.identifier.issn1687-1472
dc.identifier.urihttp://hdl.handle.net/10400.8/14445
dc.language.isoeng
dc.peerreviewedyes
dc.publisherSpringer Nature
dc.relation.hasversionhttps://jwcn-eurasipjournals.springeropen.com/articles/10.1155/2010/764784
dc.relation.ispartofEURASIP Journal on Wireless Communications and Networking
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectOrthogonal Frequency Division Multiplex
dc.subjectChannel Estimation
dc.subjectChannel State Information
dc.subjectOrthogonal Frequency Division Multiple Access
dc.subjectLDPC Code
dc.titleEffects of Channel Estimation on Multiuser Virtual MIMO-OFDMA Relay-Based Networkseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage13
oaire.citation.startPage1
oaire.citation.titleEURASIP Journal on Wireless Communications and Networking
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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A practical multiuser cooperative transmission scheme denoted as Virtual Maximum Ratio Transmission (VMRT) for multiple-input multiple-output-orthogonal frequency division multiple access (MIMO-OFDMA) relay-based networks is proposed and evaluated in the presence of a realistic channel estimation algorithm and using low-density parity-check (LDPC) codes. It is shown that this scheme is robust against channel estimation errors. It offers diversity and array gain, keeping the complexity low with a multiuser and multiantenna channel estimation algorithm that is simple and efficient. In addition, the combination with LDPC codes provides improved gains; diversity gains larger than 6dB can be easily obtained with a reduced number of relays. Thus, this scheme can be used to extend coverage or increase system throughput by using simple cooperative OFDMA-based relays.
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