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
La perte sur le trajet du signal et l'étalement du délai de propagation ont été mesurés aux fréquences micro-ondes de 3.35, 8.45 et 15.75 GHz le long d'une rue droite quasiment en visibilité directe (LOS) dans un environnement urbain dans différentes conditions de circulation : de jour et de nuit. La comparaison entre les mesures diurnes et nocturnes révèle que les points d'arrêt se déplacent vers la station de base en raison de l'augmentation des hauteurs effectives de la route et du trottoir ; aucun point de rupture n'a été observé pendant la journée à la hauteur d'une antenne mobile (hm) de 1.6 m. Selon les probabilités cumulées d'étalement du retard pendant la nuit, la dépendance en fréquence n'est pas clairement observée et le retard s'étale pendant hm = 1.6 m étaient nettement plus grandes que celles de hm = 2.7 m. C'est parce qu'un niveau inférieur hm entraîne un blocage plus fort de l’onde LOS, comme cela a également été observé pendant la journée. Il est confirmé que le tracé des pertes de trajet en fonction des écarts de retard est représenté par une courbe exponentielle. Les coefficients exponentiels pendant la journée se sont avérés plus élevés que ceux pendant la nuit. Cela indique qu'une onde LOS est plus susceptible d'être bloquée pendant la journée.
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Hironari MASUI, Masanori ISHII, Satoshi TAKAHASHI, Hiroyuki SHIMIZU, Takehiko KOBAYASHI, Masami AKAIKE, "Microwave Propagation Characteristics in an Urban Quasi Line-of-Sight Environment under Different Traffic Conditions" in IEICE TRANSACTIONS on Communications,
vol. E84-B, no. 5, pp. 1431-1439, May 2001, doi: .
Abstract: Signal path loss and propagation delay spread were measured at microwave frequencies of 3.35, 8.45, and 15.75 GHz along a straight quasi line-of-sight (LOS) street in an urban environment under different traffic conditions: daytime and nighttime. Comparison between daytime and nighttime measurements reveals that the break points shift toward the base station because of the increase in the effective heights of the road and sidewalk; break points were not seen during the daytime at a mobile antenna height (hm) of 1.6 m. According to the cumulative probabilities of the delay spreads during the nighttime, frequency dependence is not clearly observed and the delay spreads for hm = 1.6 m were clearly larger than those for hm = 2.7 m. This is because a lower hm results in stronger blocking of the LOS wave, as was also observed during the daytime. The plot of path losses versus delay spreads is confirmed to be represented by an exponential curve. The exponential coefficients during the daytime were observed to be greater than those during the nighttime. This indicates that a LOS wave is more likely to be blocked during the daytime.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e84-b_5_1431/_p
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@ARTICLE{e84-b_5_1431,
author={Hironari MASUI, Masanori ISHII, Satoshi TAKAHASHI, Hiroyuki SHIMIZU, Takehiko KOBAYASHI, Masami AKAIKE, },
journal={IEICE TRANSACTIONS on Communications},
title={Microwave Propagation Characteristics in an Urban Quasi Line-of-Sight Environment under Different Traffic Conditions},
year={2001},
volume={E84-B},
number={5},
pages={1431-1439},
abstract={Signal path loss and propagation delay spread were measured at microwave frequencies of 3.35, 8.45, and 15.75 GHz along a straight quasi line-of-sight (LOS) street in an urban environment under different traffic conditions: daytime and nighttime. Comparison between daytime and nighttime measurements reveals that the break points shift toward the base station because of the increase in the effective heights of the road and sidewalk; break points were not seen during the daytime at a mobile antenna height (hm) of 1.6 m. According to the cumulative probabilities of the delay spreads during the nighttime, frequency dependence is not clearly observed and the delay spreads for hm = 1.6 m were clearly larger than those for hm = 2.7 m. This is because a lower hm results in stronger blocking of the LOS wave, as was also observed during the daytime. The plot of path losses versus delay spreads is confirmed to be represented by an exponential curve. The exponential coefficients during the daytime were observed to be greater than those during the nighttime. This indicates that a LOS wave is more likely to be blocked during the daytime.},
keywords={},
doi={},
ISSN={},
month={May},}
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TY - JOUR
TI - Microwave Propagation Characteristics in an Urban Quasi Line-of-Sight Environment under Different Traffic Conditions
T2 - IEICE TRANSACTIONS on Communications
SP - 1431
EP - 1439
AU - Hironari MASUI
AU - Masanori ISHII
AU - Satoshi TAKAHASHI
AU - Hiroyuki SHIMIZU
AU - Takehiko KOBAYASHI
AU - Masami AKAIKE
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E84-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2001
AB - Signal path loss and propagation delay spread were measured at microwave frequencies of 3.35, 8.45, and 15.75 GHz along a straight quasi line-of-sight (LOS) street in an urban environment under different traffic conditions: daytime and nighttime. Comparison between daytime and nighttime measurements reveals that the break points shift toward the base station because of the increase in the effective heights of the road and sidewalk; break points were not seen during the daytime at a mobile antenna height (hm) of 1.6 m. According to the cumulative probabilities of the delay spreads during the nighttime, frequency dependence is not clearly observed and the delay spreads for hm = 1.6 m were clearly larger than those for hm = 2.7 m. This is because a lower hm results in stronger blocking of the LOS wave, as was also observed during the daytime. The plot of path losses versus delay spreads is confirmed to be represented by an exponential curve. The exponential coefficients during the daytime were observed to be greater than those during the nighttime. This indicates that a LOS wave is more likely to be blocked during the daytime.
ER -