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
Les systèmes LAN sans fil à vitesse moyenne (2.4 à 1 Mbit/s) dans la bande 2 GHz sont largement utilisés dans les bureaux et les usines. Des interférences électromagnétiques peuvent se produire entre ces systèmes car ils utilisent la même gamme de fréquences. Dans cet article, nous étudions les caractéristiques des interférences entre les systèmes LAN sans fil qui utilisent des systèmes à séquence directe (DS) et les systèmes à sauts de fréquence (FH). Les caractéristiques d'interférence ont été mesurées pour trois systèmes DS et un système FH répondant aux normes IEEE 802.11 et RCR et utilisant différentes méthodes de modulation. Nos résultats indiquent que le débit dépend du système et de la méthode de modulation. Nous avons également développé un modèle qui peut être utilisé pour calculer les caractéristiques d'interférence entre les systèmes DS et FH en considérant la bande passante de leurs signaux de transmission, le temps de séjour du système FH et le temps dont le système DS a besoin pour transmettre une trame de données. . Nous avons utilisé ce modèle pour calculer les caractéristiques du taux d'erreur sur les bits (BER) des systèmes utilisés dans notre expérience, et les résultats indiquent que les caractéristiques du BER dépendent de la méthode de modulation. Les caractéristiques de débit des systèmes utilisés dans notre expérience ont également été calculées et concordaient avec les résultats de l'expérience à +/- 5 dB. Les caractéristiques de débit des systèmes LAN sans fil basés sur la norme IEEE 802.11 ont également été calculées lorsque le niveau du signal était supérieur au niveau de bruit du récepteur. Les résultats montrent que les systèmes FH nécessitent un rapport D/U environ 7 ou 8 dB supérieur au rapport requis dans les systèmes DS car les paramètres de la norme diffèrent entre les systèmes FH et DS.
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Kazuhiro TAKAYA, Yuji MAEDA, Nobuo KUWABARA, "Characteristics of Interference between Direct-Sequence Systems and Frequency-Hopping Systems of 2.4-GHz-Band Mid-Speed Wireless LANs" in IEICE TRANSACTIONS on Communications,
vol. E84-B, no. 2, pp. 204-212, February 2001, doi: .
Abstract: 2.4-GHz-band mid-speed (1- to 2-Mbit/sec) wireless LAN systems are being widely used in offices and factories. Electromagnetic interference can occur between these systems because they use the same frequency range. In this paper, we investigate the characteristics of the interference between wireless LAN systems that use direct-sequence (DS) systems and frequency-hopping (FH) systems. The interference characteristics were measured for three DS systems and one FH system that meet the IEEE 802.11 and RCR standards and that use different modulation methods. Our results indicate that throughput depends on the system and the modulation method. We have also developed a model that can be used to calculate the interference characteristics between DS and FH systems by considering the bandwidth of their transmission signals, the dwell time of the FH system, and the time that the DS system needs to transmit a data frame. We used this model to calculate the bit error rate (BER) characteristics of the systems used in our experiment, and the results indicate that BER characteristics depend on the modulation method. The throughput characteristics of the systems used in our experiment were also calculated, and agreed with the experiment results within +/- 5 dB. The throughput characteristics of wireless LAN systems based on IEEE 802.11 were also calculated when the signal level was higher than the receiver noise level. The results show that FH systems require a D/U ratio about 7 or 8 dB higher than the ratio required in DS systems because the parameters in the standard differ between FH and DS systems.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e84-b_2_204/_p
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@ARTICLE{e84-b_2_204,
author={Kazuhiro TAKAYA, Yuji MAEDA, Nobuo KUWABARA, },
journal={IEICE TRANSACTIONS on Communications},
title={Characteristics of Interference between Direct-Sequence Systems and Frequency-Hopping Systems of 2.4-GHz-Band Mid-Speed Wireless LANs},
year={2001},
volume={E84-B},
number={2},
pages={204-212},
abstract={2.4-GHz-band mid-speed (1- to 2-Mbit/sec) wireless LAN systems are being widely used in offices and factories. Electromagnetic interference can occur between these systems because they use the same frequency range. In this paper, we investigate the characteristics of the interference between wireless LAN systems that use direct-sequence (DS) systems and frequency-hopping (FH) systems. The interference characteristics were measured for three DS systems and one FH system that meet the IEEE 802.11 and RCR standards and that use different modulation methods. Our results indicate that throughput depends on the system and the modulation method. We have also developed a model that can be used to calculate the interference characteristics between DS and FH systems by considering the bandwidth of their transmission signals, the dwell time of the FH system, and the time that the DS system needs to transmit a data frame. We used this model to calculate the bit error rate (BER) characteristics of the systems used in our experiment, and the results indicate that BER characteristics depend on the modulation method. The throughput characteristics of the systems used in our experiment were also calculated, and agreed with the experiment results within +/- 5 dB. The throughput characteristics of wireless LAN systems based on IEEE 802.11 were also calculated when the signal level was higher than the receiver noise level. The results show that FH systems require a D/U ratio about 7 or 8 dB higher than the ratio required in DS systems because the parameters in the standard differ between FH and DS systems.},
keywords={},
doi={},
ISSN={},
month={February},}
Copier
TY - JOUR
TI - Characteristics of Interference between Direct-Sequence Systems and Frequency-Hopping Systems of 2.4-GHz-Band Mid-Speed Wireless LANs
T2 - IEICE TRANSACTIONS on Communications
SP - 204
EP - 212
AU - Kazuhiro TAKAYA
AU - Yuji MAEDA
AU - Nobuo KUWABARA
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E84-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2001
AB - 2.4-GHz-band mid-speed (1- to 2-Mbit/sec) wireless LAN systems are being widely used in offices and factories. Electromagnetic interference can occur between these systems because they use the same frequency range. In this paper, we investigate the characteristics of the interference between wireless LAN systems that use direct-sequence (DS) systems and frequency-hopping (FH) systems. The interference characteristics were measured for three DS systems and one FH system that meet the IEEE 802.11 and RCR standards and that use different modulation methods. Our results indicate that throughput depends on the system and the modulation method. We have also developed a model that can be used to calculate the interference characteristics between DS and FH systems by considering the bandwidth of their transmission signals, the dwell time of the FH system, and the time that the DS system needs to transmit a data frame. We used this model to calculate the bit error rate (BER) characteristics of the systems used in our experiment, and the results indicate that BER characteristics depend on the modulation method. The throughput characteristics of the systems used in our experiment were also calculated, and agreed with the experiment results within +/- 5 dB. The throughput characteristics of wireless LAN systems based on IEEE 802.11 were also calculated when the signal level was higher than the receiver noise level. The results show that FH systems require a D/U ratio about 7 or 8 dB higher than the ratio required in DS systems because the parameters in the standard differ between FH and DS systems.
ER -