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
Des mesures de propagation du retard ont été effectuées aux fréquences micro-ondes de 3.35, 8.45 et 15.75 GHz le long des rues quasiment en visibilité directe de la zone métropolitaine de Tokyo. On constate que les écarts de retard augmentent avec la distance de mesure et atteignent environ 600 ns jusqu'à 1 km. Il est également confirmé qu'une probabilité cumulée d'étalement des retards suit une distribution log-normale. Les gradients d'étalement des retards en fonction de la distance sont plus grands pour une hauteur d'antenne mobile inférieure. hm = 1.6 m que pour hm = 2.7 m dans ces mesures en raison de l'effet de blocage de la circulation des véhicules et des piétons sur la route. Lorsque la hauteur de l'antenne mobile est de 2.7 m, le retard s'étend dans la plage avant que les points de rupture soient observés relativement faibles : 90 ns (3.35 GHz), 140 ns (8.45 GHz) et 150 ns (15.75 GHz) avec une probabilité cumulée de 90 %. Les gradients des écarts de retard en fonction de la distance sont plus grands pour les rues plus larges dans nos mesures.
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Hironari MASUI, Koichi TAKAHASHI, Satoshi TAKAHASHI, Kouzou KAGE, Takehiko KOBAYASHI, "Distance Dependence of Microwave Delay Spreads Measured in Urban Quasi Line-of-Sight Environments" in IEICE TRANSACTIONS on Communications,
vol. E82-B, no. 12, pp. 1997-2003, December 1999, doi: .
Abstract: Measurements of delay spread were performed at microwave frequencies of 3.35, 8.45 and 15.75 GHz along quasi line-of-sight streets in metropolitan Tokyo. It is found that the delay spreads increase with the measurement distance and reach around 600 ns up to 1 km. It is also confirmed that a cumulative probability of the delay spreads follows a log-normal distribution. The gradients of delay spreads against the distance are greater for a lower mobile antenna height hm = 1.6 m than for hm = 2.7 m in these measurements because of blocking effect by the traffic of vehicles and pedestrians on the road. When the mobile antenna height is 2.7 m, the delay spreads within the range before the break points are observed relatively small: 90 ns (3.35 GHz), 140 ns (8.45 GHz) and 150 ns (15.75 GHz) at the cumulative probability of 90%. The gradients of delay spreads against the distance are greater for wider streets in our measurements.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e82-b_12_1997/_p
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@ARTICLE{e82-b_12_1997,
author={Hironari MASUI, Koichi TAKAHASHI, Satoshi TAKAHASHI, Kouzou KAGE, Takehiko KOBAYASHI, },
journal={IEICE TRANSACTIONS on Communications},
title={Distance Dependence of Microwave Delay Spreads Measured in Urban Quasi Line-of-Sight Environments},
year={1999},
volume={E82-B},
number={12},
pages={1997-2003},
abstract={Measurements of delay spread were performed at microwave frequencies of 3.35, 8.45 and 15.75 GHz along quasi line-of-sight streets in metropolitan Tokyo. It is found that the delay spreads increase with the measurement distance and reach around 600 ns up to 1 km. It is also confirmed that a cumulative probability of the delay spreads follows a log-normal distribution. The gradients of delay spreads against the distance are greater for a lower mobile antenna height hm = 1.6 m than for hm = 2.7 m in these measurements because of blocking effect by the traffic of vehicles and pedestrians on the road. When the mobile antenna height is 2.7 m, the delay spreads within the range before the break points are observed relatively small: 90 ns (3.35 GHz), 140 ns (8.45 GHz) and 150 ns (15.75 GHz) at the cumulative probability of 90%. The gradients of delay spreads against the distance are greater for wider streets in our measurements.},
keywords={},
doi={},
ISSN={},
month={December},}
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TY - JOUR
TI - Distance Dependence of Microwave Delay Spreads Measured in Urban Quasi Line-of-Sight Environments
T2 - IEICE TRANSACTIONS on Communications
SP - 1997
EP - 2003
AU - Hironari MASUI
AU - Koichi TAKAHASHI
AU - Satoshi TAKAHASHI
AU - Kouzou KAGE
AU - Takehiko KOBAYASHI
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E82-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 1999
AB - Measurements of delay spread were performed at microwave frequencies of 3.35, 8.45 and 15.75 GHz along quasi line-of-sight streets in metropolitan Tokyo. It is found that the delay spreads increase with the measurement distance and reach around 600 ns up to 1 km. It is also confirmed that a cumulative probability of the delay spreads follows a log-normal distribution. The gradients of delay spreads against the distance are greater for a lower mobile antenna height hm = 1.6 m than for hm = 2.7 m in these measurements because of blocking effect by the traffic of vehicles and pedestrians on the road. When the mobile antenna height is 2.7 m, the delay spreads within the range before the break points are observed relatively small: 90 ns (3.35 GHz), 140 ns (8.45 GHz) and 150 ns (15.75 GHz) at the cumulative probability of 90%. The gradients of delay spreads against the distance are greater for wider streets in our measurements.
ER -