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http://hdl.handle.net/11144/3670
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Campo DC | Valor | Idioma |
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dc.contributor.author | Dinis, Rui | - |
dc.contributor.author | Teodoro, Sara | - |
dc.contributor.author | Silva, Adão | - |
dc.contributor.author | Gameiro, Atílio | - |
dc.date.accessioned | 2018-04-12T15:59:20Z | - |
dc.date.available | 2018-04-12T15:59:20Z | - |
dc.date.issued | 2017 | - |
dc.identifier.citation | Teodoro, S., Silva, A., Dinis, R. et al. Wireless Pers Commun (2017) 96: 799 | por |
dc.identifier.issn | 0929-6212 | - |
dc.identifier.uri | http://hdl.handle.net/11144/3670 | - |
dc.description.abstract | 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. | por |
dc.language.iso | eng | por |
dc.publisher | Springer | por |
dc.rights | openAccess | por |
dc.subject | Channel state information | por |
dc.subject | Limited feedback | por |
dc.subject | Random vector quantization | por |
dc.subject | Sparse channels | por |
dc.subject | Uniform quantization | por |
dc.title | Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems | por |
dc.type | article | por |
degois.publication.firstPage | 799 | por |
degois.publication.lastPage | 812 | por |
degois.publication.title | Wireless Personal Communications | por |
degois.publication.volume | 96, nº 1 | por |
dc.peerreviewed | yes | por |
dc.relation.publisherversion | https://link.springer.com/article/10.1007/s11277-017-4201-8 | por |
dc.identifier.doi | 10.1007/s11277-017-4201-8 | por |
Aparece nas colecções: | DCT - Artigos/Papers |
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EFFICIENT.pdf | 939,85 kB | Adobe PDF | Ver/Abrir |
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