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
Os sistemas LAN sem fio de banda de 2.4 GHz e velocidade média (1 a 2 Mbit/s) estão sendo amplamente utilizados em escritórios e fábricas. Pode ocorrer interferência eletromagnética entre esses sistemas porque eles usam a mesma faixa de frequência. Neste artigo, investigamos as características da interferência entre sistemas LAN sem fio que utilizam sistemas de sequência direta (DS) e sistemas de salto de frequência (FH). As características de interferência foram medidas para três sistemas DS e um sistema FH que atendem aos padrões IEEE 802.11 e RCR e que utilizam diferentes métodos de modulação. Nossos resultados indicam que o rendimento depende do sistema e do método de modulação. Também desenvolvemos um modelo que pode ser usado para calcular as características de interferência entre sistemas DS e FH considerando a largura de banda de seus sinais de transmissão, o tempo de permanência do sistema FH e o tempo que o sistema DS precisa para transmitir um quadro de dados. . Utilizamos este modelo para calcular as características da taxa de erro de bit (BER) dos sistemas utilizados em nosso experimento, e os resultados indicam que as características do BER dependem do método de modulação. As características de rendimento dos sistemas utilizados em nosso experimento também foram calculadas e concordaram com os resultados do experimento dentro de +/- 5 dB. As características de rendimento dos sistemas LAN sem fio baseados em IEEE 802.11 também foram calculadas quando o nível do sinal era superior ao nível de ruído do receptor. Os resultados mostram que os sistemas FH requerem uma relação D/U cerca de 7 ou 8 dB superior à relação exigida nos sistemas DS porque os parâmetros da norma diferem entre os sistemas FH e 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},}
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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 -