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
Dans un système de multiplexage par répartition orthogonale de la fréquence (OFDM), les performances en matière d'erreur sur les bits sont dégradées en présence de plusieurs chemins de propagation dont les retards excédentaires sont plus longs que l'intervalle de garde (GI), car l'orthogonalité entre les sous-porteuses ne peut pas être maintenue. Dans cet article, nous proposons une nouvelle méthode de démodulation OFDM avec un symbole effectif de longueur variable et un annuleur d'interférence inter-porteuses (ICI) à plusieurs étages, afin d'améliorer les performances d'erreur sur les bits en présence de trajets multiples dont les délais excédentaires sont plus longs. que le GI. L'influence de l'interférence inter-symboles (ISI) est éliminée par le symbole effectif de longueur variable, puis la composante ICI est réduite par l'annuleur ICI à plusieurs étages. Le principe de la méthode proposée est expliqué, et les performances de la méthode proposée sont ensuite évaluées par simulation informatique. Les résultats montrent que la méthode proposée améliore la disponibilité du système dans des environnements d'évanouissement par trajets multiples plus variés sans modifier les paramètres du système.
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.
Copier
Noriyoshi SUZUKI, Hideyuki UEHARA, Mitsuo YOKOYAMA, "A New OFDM Demodulation Method with Variable-Length Effective Symbol and ICI Canceller" in IEICE TRANSACTIONS on Fundamentals,
vol. E85-A, no. 12, pp. 2859-2867, December 2002, doi: .
Abstract: In an orthogonal frequency division multiplexing (OFDM) system, the bit error performance is degraded in the presence of multiple propagation paths whose excess delays are longer than the Guard Interval (GI), because the orthogonality between subcarriers cannot be maintained. In this paper, we propose a new OFDM demodulation method with a variable-length effective symbol and a multi-stage inter-carrier interference (ICI) canceller, in order to improve the bit error performance in the presence of multipaths whose excess delays are longer than the GI. The influence of the inter-symbol interference (ISI) is eliminated by the variable-length effective symbol, and then the ICI component is reduced by the multi-stage ICI canceller. The principle of the proposed method is explained, and the performance of the proposed method is then evaluated by computer simulation. The results show that the proposed method improves the system availability under more various multipath fading environments without changing the system parameters.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e85-a_12_2859/_p
Copier
@ARTICLE{e85-a_12_2859,
author={Noriyoshi SUZUKI, Hideyuki UEHARA, Mitsuo YOKOYAMA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A New OFDM Demodulation Method with Variable-Length Effective Symbol and ICI Canceller},
year={2002},
volume={E85-A},
number={12},
pages={2859-2867},
abstract={In an orthogonal frequency division multiplexing (OFDM) system, the bit error performance is degraded in the presence of multiple propagation paths whose excess delays are longer than the Guard Interval (GI), because the orthogonality between subcarriers cannot be maintained. In this paper, we propose a new OFDM demodulation method with a variable-length effective symbol and a multi-stage inter-carrier interference (ICI) canceller, in order to improve the bit error performance in the presence of multipaths whose excess delays are longer than the GI. The influence of the inter-symbol interference (ISI) is eliminated by the variable-length effective symbol, and then the ICI component is reduced by the multi-stage ICI canceller. The principle of the proposed method is explained, and the performance of the proposed method is then evaluated by computer simulation. The results show that the proposed method improves the system availability under more various multipath fading environments without changing the system parameters.},
keywords={},
doi={},
ISSN={},
month={December},}
Copier
TY - JOUR
TI - A New OFDM Demodulation Method with Variable-Length Effective Symbol and ICI Canceller
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2859
EP - 2867
AU - Noriyoshi SUZUKI
AU - Hideyuki UEHARA
AU - Mitsuo YOKOYAMA
PY - 2002
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E85-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 2002
AB - In an orthogonal frequency division multiplexing (OFDM) system, the bit error performance is degraded in the presence of multiple propagation paths whose excess delays are longer than the Guard Interval (GI), because the orthogonality between subcarriers cannot be maintained. In this paper, we propose a new OFDM demodulation method with a variable-length effective symbol and a multi-stage inter-carrier interference (ICI) canceller, in order to improve the bit error performance in the presence of multipaths whose excess delays are longer than the GI. The influence of the inter-symbol interference (ISI) is eliminated by the variable-length effective symbol, and then the ICI component is reduced by the multi-stage ICI canceller. The principle of the proposed method is explained, and the performance of the proposed method is then evaluated by computer simulation. The results show that the proposed method improves the system availability under more various multipath fading environments without changing the system parameters.
ER -