Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems

The orthogonality of the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) modulation is ensured as long as the channel can be assumed constant across the duration of one CP-OFDM symbol period. Unfortunately, this assumption may not hold anymore for a large variety of emerging scena...

Descripción completa

Detalles Bibliográficos
Autores: Rottenberg, F, Mestre, X, Horlin, F, Louveaux, J
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
Repositorio:r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
OAI Identifier:oai:cttc.fundanetsuite.com:p1435
Acceso en línea:https://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1435
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077808228&doi=10.1109%2fTSP.2019.2943257&partnerID=40&md5=c0cfa1493874179bb20b15fca8fb1a89
Access Level:acceso abierto
Palabra clave:Carrier communication
Equalizers
Frequency allocation
Mean square error
MIMO systems
Orthogonal frequency division multiplexing
Analytical formulas
equalization
Implementation complexity
Linear minimum mean-squared errors
Multiple carrier frequencies
multiple CFOs
Taylor approximation
Time varying channel
Time varying networks
id ES_5fe1b8ea060ebda8c6dd2cc598ea2a39
oai_identifier_str oai:cttc.fundanetsuite.com:p1435
network_acronym_str ES
network_name_str España
repository_id_str
spelling Efficient Equalization of Time-Varying Channels in MIMO OFDM SystemsRottenberg, FMestre, XHorlin, FLouveaux, JCarrier communicationEqualizersFrequency allocationMean square errorMIMO systemsOrthogonal frequency division multiplexingAnalytical formulasequalizationImplementation complexityLinear minimum mean-squared errorsMultiple carrier frequenciesmultiple CFOsTaylor approximationTime varying channelTime varying networksThe orthogonality of the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) modulation is ensured as long as the channel can be assumed constant across the duration of one CP-OFDM symbol period. Unfortunately, this assumption may not hold anymore for a large variety of emerging scenarios with mobility, high carrier frequency and multiple carrier frequency offsets. To tackle this issue, we propose a novel equalization structure. In contrast to existing works in the literature, the equalizer is obtained by considering a Taylor approximation of the ideal time-varying channel equalizer function. This results in an extremely simple implementation only consisting of per-subcarrier multiplications and FFT/IFFT operations. The general form of the equalizer is particularized to two specific cases: zero forcing and linear minimum mean squared error. Furthermore, the implementation complexity of the equalizers is computed and an analytical formula is proposed to efficiently evaluate their performance. Finally, numerical results demonstrate the efficiency of the proposed receivers as compared to the ideal one and previous works. © 1991-2012 IEEE.Institute of Electrical and Electronics Engineers Inc.2019info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1435https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077808228&doi=10.1109%2fTSP.2019.2943257&partnerID=40&md5=c0cfa1493874179bb20b15fca8fb1a89IEEE TRANSACTIONS ON SIGNAL PROCESSINGISSN: 19410476ISSNe: 1053587Xreponame:r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)instname:Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)Inglésinfo:eu-repo/semantics/openAccessoai:cttc.fundanetsuite.com:p14352026-06-17T11:44:47Z
dc.title.none.fl_str_mv Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
title Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
spellingShingle Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
Rottenberg, F
Carrier communication
Equalizers
Frequency allocation
Mean square error
MIMO systems
Orthogonal frequency division multiplexing
Analytical formulas
equalization
Implementation complexity
Linear minimum mean-squared errors
Multiple carrier frequencies
multiple CFOs
Taylor approximation
Time varying channel
Time varying networks
title_short Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
title_full Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
title_fullStr Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
title_full_unstemmed Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
title_sort Efficient Equalization of Time-Varying Channels in MIMO OFDM Systems
dc.creator.none.fl_str_mv Rottenberg, F
Mestre, X
Horlin, F
Louveaux, J
author Rottenberg, F
author_facet Rottenberg, F
Mestre, X
Horlin, F
Louveaux, J
author_role author
author2 Mestre, X
Horlin, F
Louveaux, J
author2_role author
author
author
dc.subject.none.fl_str_mv Carrier communication
Equalizers
Frequency allocation
Mean square error
MIMO systems
Orthogonal frequency division multiplexing
Analytical formulas
equalization
Implementation complexity
Linear minimum mean-squared errors
Multiple carrier frequencies
multiple CFOs
Taylor approximation
Time varying channel
Time varying networks
topic Carrier communication
Equalizers
Frequency allocation
Mean square error
MIMO systems
Orthogonal frequency division multiplexing
Analytical formulas
equalization
Implementation complexity
Linear minimum mean-squared errors
Multiple carrier frequencies
multiple CFOs
Taylor approximation
Time varying channel
Time varying networks
description The orthogonality of the cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) modulation is ensured as long as the channel can be assumed constant across the duration of one CP-OFDM symbol period. Unfortunately, this assumption may not hold anymore for a large variety of emerging scenarios with mobility, high carrier frequency and multiple carrier frequency offsets. To tackle this issue, we propose a novel equalization structure. In contrast to existing works in the literature, the equalizer is obtained by considering a Taylor approximation of the ideal time-varying channel equalizer function. This results in an extremely simple implementation only consisting of per-subcarrier multiplications and FFT/IFFT operations. The general form of the equalizer is particularized to two specific cases: zero forcing and linear minimum mean squared error. Furthermore, the implementation complexity of the equalizers is computed and an analytical formula is proposed to efficiently evaluate their performance. Finally, numerical results demonstrate the efficiency of the proposed receivers as compared to the ideal one and previous works. © 1991-2012 IEEE.
publishDate 2019
dc.date.none.fl_str_mv 2019
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1435
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077808228&doi=10.1109%2fTSP.2019.2943257&partnerID=40&md5=c0cfa1493874179bb20b15fca8fb1a89
url https://cttc.fundanetsuite.com/Publicaciones/ProdCientif/PublicacionFrw.aspx?id=1435
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85077808228&doi=10.1109%2fTSP.2019.2943257&partnerID=40&md5=c0cfa1493874179bb20b15fca8fb1a89
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers Inc.
publisher.none.fl_str_mv Institute of Electrical and Electronics Engineers Inc.
dc.source.none.fl_str_mv IEEE TRANSACTIONS ON SIGNAL PROCESSING
ISSN: 19410476
ISSNe: 1053587X
reponame:r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
instname:Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
instname_str Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
reponame_str r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
collection r-CTTC. Repositorio Institucional Producción Científica del Centre Tecnològic de Telecomunicacions de Catalunya (CTTC)
repository.name.fl_str_mv
repository.mail.fl_str_mv
_version_ 1869409250683387904
score 15,811543

Similares en LA Referencia