Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/11144/3670 |
Resumo: | Channel state information at the transmitter side is an important issue for wireless communications systems, namely when precoding techniques are employed. Recent works explored random vector quantization (RVQ) as a solution for limited feedback for multi-user systems equipped with multiple antennas. Despite of being a good option for narrowband channels, this method requires large complexity and is not efficient for sparse channels. To overcome these drawbacks we consider a strategy based on uniform quantization, denoted partial uniform quantization (P-UQ), where just part of channel frequency response is quantized. This allows an efficient feedback of channel frequency response from the receivers to the transmitter, by using a reduced number of quantization bits. The comparison between the proposed P-UQ-based method and RVQ performed in this paper leads to the conclusion that the most advantageous method for sparse channels is the P-UQ. |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM SystemsChannel state informationLimited feedbackRandom vector quantizationSparse channelsUniform quantizationChannel state information at the transmitter side is an important issue for wireless communications systems, namely when precoding techniques are employed. Recent works explored random vector quantization (RVQ) as a solution for limited feedback for multi-user systems equipped with multiple antennas. Despite of being a good option for narrowband channels, this method requires large complexity and is not efficient for sparse channels. To overcome these drawbacks we consider a strategy based on uniform quantization, denoted partial uniform quantization (P-UQ), where just part of channel frequency response is quantized. This allows an efficient feedback of channel frequency response from the receivers to the transmitter, by using a reduced number of quantization bits. The comparison between the proposed P-UQ-based method and RVQ performed in this paper leads to the conclusion that the most advantageous method for sparse channels is the P-UQ.Springer2018-04-12T15:59:20Z2017-01-01T00:00:00Z2017info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/11144/3670eng0929-621210.1007/s11277-017-4201-8Dinis, RuiTeodoro, SaraSilva, AdãoGameiro, Atílioinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-01-16T14:05:11ZPortal AgregadorONG |
dc.title.none.fl_str_mv |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
title |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
spellingShingle |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems Dinis, Rui Channel state information Limited feedback Random vector quantization Sparse channels Uniform quantization |
title_short |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
title_full |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
title_fullStr |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
title_full_unstemmed |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
title_sort |
Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
author |
Dinis, Rui |
author_facet |
Dinis, Rui Teodoro, Sara Silva, Adão Gameiro, Atílio |
author_role |
author |
author2 |
Teodoro, Sara Silva, Adão Gameiro, Atílio |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Dinis, Rui Teodoro, Sara Silva, Adão Gameiro, Atílio |
dc.subject.por.fl_str_mv |
Channel state information Limited feedback Random vector quantization Sparse channels Uniform quantization |
topic |
Channel state information Limited feedback Random vector quantization Sparse channels Uniform quantization |
description |
Channel state information at the transmitter side is an important issue for wireless communications systems, namely when precoding techniques are employed. Recent works explored random vector quantization (RVQ) as a solution for limited feedback for multi-user systems equipped with multiple antennas. Despite of being a good option for narrowband channels, this method requires large complexity and is not efficient for sparse channels. To overcome these drawbacks we consider a strategy based on uniform quantization, denoted partial uniform quantization (P-UQ), where just part of channel frequency response is quantized. This allows an efficient feedback of channel frequency response from the receivers to the transmitter, by using a reduced number of quantization bits. The comparison between the proposed P-UQ-based method and RVQ performed in this paper leads to the conclusion that the most advantageous method for sparse channels is the P-UQ. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01T00:00:00Z 2017 2018-04-12T15:59:20Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/11144/3670 |
url |
http://hdl.handle.net/11144/3670 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0929-6212 10.1007/s11277-017-4201-8 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Springer |
publisher.none.fl_str_mv |
Springer |
dc.source.none.fl_str_mv |
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instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
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1777301939738902528 |