Utilize este identificador para referenciar este registo:
http://hdl.handle.net/11144/3670
Título: | Efficient Uniform Channel Quantization of Sparse CIR for Downlink OFDM Systems |
Autor: | Dinis, Rui Teodoro, Sara Silva, Adão Gameiro, Atílio |
Palavras-chave: | Channel state information Limited feedback Random vector quantization Sparse channels Uniform quantization |
Data: | 2017 |
Editora: | Springer |
Citação: | Teodoro, S., Silva, A., Dinis, R. et al. Wireless Pers Commun (2017) 96: 799 |
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. |
Revisão por Pares: | yes |
URI: | http://hdl.handle.net/11144/3670 |
metadata.dc.identifier.doi: | 10.1007/s11277-017-4201-8 |
ISSN: | 0929-6212 |
Versão do editor: | https://link.springer.com/article/10.1007/s11277-017-4201-8 |
Aparece nas colecções: | DCT - Artigos/Papers |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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EFFICIENT.pdf | 939,85 kB | Adobe PDF | Ver/Abrir |
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