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
A perda do caminho do sinal e a propagação do atraso de propagação foram medidas em frequências de micro-ondas de 3.35, 8.45 e 15.75 GHz ao longo de uma rua reta quase com linha de visão (LOS) em um ambiente urbano sob diferentes condições de tráfego: diurno e noturno. A comparação entre as medições diurnas e noturnas revela que os pontos de interrupção se deslocam em direção à estação base devido ao aumento nas alturas efetivas da estrada e da calçada; pontos de quebra não foram vistos durante o dia na altura da antena móvel (hm) de 1.6 m. De acordo com as probabilidades cumulativas dos spreads de atraso durante o período noturno, a dependência da frequência não é claramente observada e os spreads de atraso para hm = 1.6 m eram claramente maiores do que aqueles para hm = 2.7m. Isso ocorre porque um menor hm resulta em um bloqueio mais forte da onda LOS, como também foi observado durante o dia. O gráfico de perdas de caminho versus spreads de atraso é representado por uma curva exponencial. Observou-se que os coeficientes exponenciais durante o dia foram maiores do que durante a noite. Isso indica que é mais provável que uma onda LOS seja bloqueada durante o dia.
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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 -