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".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
A propagação de erros é uma questão importante e deve ser cuidadosamente tratada nos equalizadores de feedback de decisão (DFE). Ignorar o impacto da propagação de erros muitas vezes leva a resultados laboratoriais impraticáveis. Neste artigo, investigamos dois novos equalizadores de frequência espacial em camadas (LSFE) para sistemas de portadora única, múltiplas entradas e múltiplas saídas (MIMO), onde o recentemente proposto equalizador de domínio de frequência com preditor de ruído no domínio de tempo (FDE-NP) é adotado em cada etapa do LSFE. Primeiro derivamos o LSFE parcialmente conectado com preditor de ruído (PC-LSFE-NP) que tem exatamente o mesmo erro quadrático médio (MSE) que o LSFE convencional sob a suposição de feedback perfeito. No entanto, se a propagação de erros for considerada, o PC-LSFE-NP proposto pode alcançar melhor desempenho do que o LSFE convencional devido à saída de feedback mais confiável dos decodificadores. Para reduzir a interferência das camadas ainda não detectadas na seção de feedback, introduzimos então o LSFE totalmente conectado com preditor de ruído (FC-LSFE-NP), no qual todas as camadas são equalizadas implicitamente dentro de cada estágio e suas decisões realimentadas internamente. . O poderoso filtro de feedback do FC-LSFE-NP traz uma superioridade significativa de desempenho em relação ao LSFE convencional e ao PC-LSFE-NP com feedback perfeito ou imperfeito. Além disso, propomos um desmapeador suave simples para os equalizadores para evitar perda de informações durante a decodificação e, assim, melhorar ainda mais o desempenho. Finalmente, comparamos o desempenho do (PC/FC)-LSFE-NP com os esquemas existentes por meio de simulações computacionais.
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Ang FENG, Qinye YIN, Le DING, "Single-Carrier Layered Space-Frequency Equalization with Time Domain Noise-Prediction for MIMO Systems" in IEICE TRANSACTIONS on Communications,
vol. E93-B, no. 7, pp. 1897-1905, July 2010, doi: 10.1587/transcom.E93.B.1897.
Abstract: Error-propagation is an important issue and should be carefully coped with in the decision-feedback equalizers (DFE). Ignoring the impact of error-propagation often leads to impractical laboratory results. In this paper, we investigate two novel layered space-frequency equalizers (LSFE) for single-carrier multiple-input multiple-output (MIMO) systems, where the recently proposed frequency-domain equalizer with time domain noise-predictor (FDE-NP) is adopted at each stage of the LSFE. We first derive the partially-connected LSFE with noise predictor (PC-LSFE-NP) which has exactly the same mean square error (MSE) as the conventional LSFE under the assumption of perfect feedback. However, if error-propagation is considered, the proposed PC-LSFE-NP can achieve better performance than the conventional LSFE due to the more reliable feedback output by the decoders. To reduce the interference from the not yet detected layers in the feedback section, we then introduce the fully-connected LSFE with noise predictor (FC-LSFE-NP), in which all layers are implicitly equalized within each stage and their decisions fed back internally. The powerful feedback filter of FC-LSFE-NP brings significant performance superiority over the conventional LSFE and PC-LSFE-NP with either perfect or imperfect feedback. Moreover, we propose a simple soft-demapper for the equalizers to avoid information loss during decoding, and thus, further improve the performance. Finally, we compare the performance of (PC/FC)-LSFE-NP with the existing schemes by computer simulations.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.1897/_p
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@ARTICLE{e93-b_7_1897,
author={Ang FENG, Qinye YIN, Le DING, },
journal={IEICE TRANSACTIONS on Communications},
title={Single-Carrier Layered Space-Frequency Equalization with Time Domain Noise-Prediction for MIMO Systems},
year={2010},
volume={E93-B},
number={7},
pages={1897-1905},
abstract={Error-propagation is an important issue and should be carefully coped with in the decision-feedback equalizers (DFE). Ignoring the impact of error-propagation often leads to impractical laboratory results. In this paper, we investigate two novel layered space-frequency equalizers (LSFE) for single-carrier multiple-input multiple-output (MIMO) systems, where the recently proposed frequency-domain equalizer with time domain noise-predictor (FDE-NP) is adopted at each stage of the LSFE. We first derive the partially-connected LSFE with noise predictor (PC-LSFE-NP) which has exactly the same mean square error (MSE) as the conventional LSFE under the assumption of perfect feedback. However, if error-propagation is considered, the proposed PC-LSFE-NP can achieve better performance than the conventional LSFE due to the more reliable feedback output by the decoders. To reduce the interference from the not yet detected layers in the feedback section, we then introduce the fully-connected LSFE with noise predictor (FC-LSFE-NP), in which all layers are implicitly equalized within each stage and their decisions fed back internally. The powerful feedback filter of FC-LSFE-NP brings significant performance superiority over the conventional LSFE and PC-LSFE-NP with either perfect or imperfect feedback. Moreover, we propose a simple soft-demapper for the equalizers to avoid information loss during decoding, and thus, further improve the performance. Finally, we compare the performance of (PC/FC)-LSFE-NP with the existing schemes by computer simulations.},
keywords={},
doi={10.1587/transcom.E93.B.1897},
ISSN={1745-1345},
month={July},}
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TY - JOUR
TI - Single-Carrier Layered Space-Frequency Equalization with Time Domain Noise-Prediction for MIMO Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 1897
EP - 1905
AU - Ang FENG
AU - Qinye YIN
AU - Le DING
PY - 2010
DO - 10.1587/transcom.E93.B.1897
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2010
AB - Error-propagation is an important issue and should be carefully coped with in the decision-feedback equalizers (DFE). Ignoring the impact of error-propagation often leads to impractical laboratory results. In this paper, we investigate two novel layered space-frequency equalizers (LSFE) for single-carrier multiple-input multiple-output (MIMO) systems, where the recently proposed frequency-domain equalizer with time domain noise-predictor (FDE-NP) is adopted at each stage of the LSFE. We first derive the partially-connected LSFE with noise predictor (PC-LSFE-NP) which has exactly the same mean square error (MSE) as the conventional LSFE under the assumption of perfect feedback. However, if error-propagation is considered, the proposed PC-LSFE-NP can achieve better performance than the conventional LSFE due to the more reliable feedback output by the decoders. To reduce the interference from the not yet detected layers in the feedback section, we then introduce the fully-connected LSFE with noise predictor (FC-LSFE-NP), in which all layers are implicitly equalized within each stage and their decisions fed back internally. The powerful feedback filter of FC-LSFE-NP brings significant performance superiority over the conventional LSFE and PC-LSFE-NP with either perfect or imperfect feedback. Moreover, we propose a simple soft-demapper for the equalizers to avoid information loss during decoding, and thus, further improve the performance. Finally, we compare the performance of (PC/FC)-LSFE-NP with the existing schemes by computer simulations.
ER -