The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Para melhorar o desempenho das sequências piloto ideais em vários símbolos OFDM em canais rápidos e variáveis no tempo, esta carta propõe um novo método de estimativa de canal usando tons piloto virtuais em sistemas de multiplexação por divisão de frequência ortogonal (OFDM) de múltiplas entradas e múltiplas saídas (MIMO). . Assumindo que os tons piloto virtuais sobrepostos nos locais de dados sobre as subportadoras específicas são transmitidos de todas as antenas de transmissão, os sinais piloto virtuais recebidos correspondentes nos mesmos locais são obtidos a partir dos sinais piloto reais vizinhos recebidos através das mesmas subportadoras por Filtro de salsicha. Com base na estimativa de canal de mínimos quadrados (LS), os parâmetros de canal podem ser obtidos a partir da combinação dos sinais piloto recebidos virtuais e reais sobre um símbolo OFDM. Os resultados da simulação mostram que o método de estimativa de canal proposto supera muito o método anterior para as sequências piloto ideais em vários símbolos OFDM em canais rápidos e variáveis no tempo, bem como se aproxima do método para as sequências piloto ideais do tipo pente em termos de desempenho.
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Copiar
Chengyu LIN, Wenjun ZHANG, Feng YANG, Youyun XU, "A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems" in IEICE TRANSACTIONS on Communications,
vol. E91-B, no. 11, pp. 3764-3767, November 2008, doi: 10.1093/ietcom/e91-b.11.3764.
Abstract: To improve the performance of the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, this letter proposes a novel channel estimation method using virtual pilot tones in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Assuming that the superimposed virtual pilot tones at the data locations over the specific sub-carriers are transmitted from all transmit antennas, the corresponding virtual received pilot signals at the same locations are obtained from the neighboring real received pilot signals over the same sub-carriers by Wiener filter. Based on the least squares (LS) channel estimation, the channel parameters can be obtained from the combination of the virtual and real received pilot signals over one OFDM symbol. Simulation results show that the proposed channel estimation method greatly outperforms the previous method for the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, as well as approaches the method for the comb-type optimal pilot sequences in performance.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.11.3764/_p
Copiar
@ARTICLE{e91-b_11_3764,
author={Chengyu LIN, Wenjun ZHANG, Feng YANG, Youyun XU, },
journal={IEICE TRANSACTIONS on Communications},
title={A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems},
year={2008},
volume={E91-B},
number={11},
pages={3764-3767},
abstract={To improve the performance of the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, this letter proposes a novel channel estimation method using virtual pilot tones in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Assuming that the superimposed virtual pilot tones at the data locations over the specific sub-carriers are transmitted from all transmit antennas, the corresponding virtual received pilot signals at the same locations are obtained from the neighboring real received pilot signals over the same sub-carriers by Wiener filter. Based on the least squares (LS) channel estimation, the channel parameters can be obtained from the combination of the virtual and real received pilot signals over one OFDM symbol. Simulation results show that the proposed channel estimation method greatly outperforms the previous method for the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, as well as approaches the method for the comb-type optimal pilot sequences in performance.},
keywords={},
doi={10.1093/ietcom/e91-b.11.3764},
ISSN={1745-1345},
month={November},}
Copiar
TY - JOUR
TI - A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 3764
EP - 3767
AU - Chengyu LIN
AU - Wenjun ZHANG
AU - Feng YANG
AU - Youyun XU
PY - 2008
DO - 10.1093/ietcom/e91-b.11.3764
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2008
AB - To improve the performance of the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, this letter proposes a novel channel estimation method using virtual pilot tones in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Assuming that the superimposed virtual pilot tones at the data locations over the specific sub-carriers are transmitted from all transmit antennas, the corresponding virtual received pilot signals at the same locations are obtained from the neighboring real received pilot signals over the same sub-carriers by Wiener filter. Based on the least squares (LS) channel estimation, the channel parameters can be obtained from the combination of the virtual and real received pilot signals over one OFDM symbol. Simulation results show that the proposed channel estimation method greatly outperforms the previous method for the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, as well as approaches the method for the comb-type optimal pilot sequences in performance.
ER -