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
Model yang menggabungkan kehilangan ruang bebas (berkadar dengan kuasa dua jarak d) dan lebihan kehilangan telah diketahui untuk menilai kehilangan laluan garis penglihatan gelombang mikro (LOS) dalam persekitaran mikrosel jalanan. Kehilangan berlebihan mewakili kesan halangan yang membayangi. Kami mengukur kehilangan laluan pada frekuensi 3.35, 8.45 dan 15.75 GHz dalam persekitaran bandar dan menganalisis ciri jarak kehilangan pas untuk ketinggian antena mudah alih 2.7, 1.6 dan 0.5 m. Keputusan menunjukkan bahawa menggunakan model baharu yang berasaskan a dα formula bukannya d2 dalam model konvensional menghasilkan kesesuaian yang lebih baik dengan data yang diukur. Mereka juga menunjukkan bahawa menurunkan antena mudah alih kepada ketinggian 0. 5 m memungkinkan untuk hampir mengabaikan faktor kehilangan yang berlebihan dan, sebaliknya, menggunakan dα formula untuk menilai ciri kehilangan laluan.
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Salinan
Koichi TAKAHASHI, Hironari MASUI, Satoshi TAKAHASHI, Kouzou KAGE, Takehiko KOBAYASHI, "Path Loss Modeling of Line-of-Sight Microwave Urban Propagation with Low-Height Antenna Mobile Stations" in IEICE TRANSACTIONS on Electronics,
vol. E82-C, no. 7, pp. 1330-1333, July 1999, doi: .
Abstract: A model that combines free-space loss (proportional to the square of distance d) and excess loss has been known to assess the microwave line-of-sight (LOS) path loss in street microcell environments. The excess loss represents the effects of shadowing obstacles. We measure the path loss at the 3.35, 8.45, and 15.75 GHz frequencies in an urban environment, and analyze the distance characteristics of the pass loss for mobile antenna heights of 2.7, 1.6, and 0.5 m. Results show that using a new model that bases on a dα formula instead of d2 in the conventional model produced a better fit to the measured data. They also show that lowering the mobile antenna to a height of 0. 5 m made it possible to virtually ignore the excess loss factor and, instead, use the dα formula to assess the path loss characteristics.
URL: https://global.ieice.org/en_transactions/electronics/10.1587/e82-c_7_1330/_p
Salinan
@ARTICLE{e82-c_7_1330,
author={Koichi TAKAHASHI, Hironari MASUI, Satoshi TAKAHASHI, Kouzou KAGE, Takehiko KOBAYASHI, },
journal={IEICE TRANSACTIONS on Electronics},
title={Path Loss Modeling of Line-of-Sight Microwave Urban Propagation with Low-Height Antenna Mobile Stations},
year={1999},
volume={E82-C},
number={7},
pages={1330-1333},
abstract={A model that combines free-space loss (proportional to the square of distance d) and excess loss has been known to assess the microwave line-of-sight (LOS) path loss in street microcell environments. The excess loss represents the effects of shadowing obstacles. We measure the path loss at the 3.35, 8.45, and 15.75 GHz frequencies in an urban environment, and analyze the distance characteristics of the pass loss for mobile antenna heights of 2.7, 1.6, and 0.5 m. Results show that using a new model that bases on a dα formula instead of d2 in the conventional model produced a better fit to the measured data. They also show that lowering the mobile antenna to a height of 0. 5 m made it possible to virtually ignore the excess loss factor and, instead, use the dα formula to assess the path loss characteristics.},
keywords={},
doi={},
ISSN={},
month={July},}
Salinan
TY - JOUR
TI - Path Loss Modeling of Line-of-Sight Microwave Urban Propagation with Low-Height Antenna Mobile Stations
T2 - IEICE TRANSACTIONS on Electronics
SP - 1330
EP - 1333
AU - Koichi TAKAHASHI
AU - Hironari MASUI
AU - Satoshi TAKAHASHI
AU - Kouzou KAGE
AU - Takehiko KOBAYASHI
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Electronics
SN -
VL - E82-C
IS - 7
JA - IEICE TRANSACTIONS on Electronics
Y1 - July 1999
AB - A model that combines free-space loss (proportional to the square of distance d) and excess loss has been known to assess the microwave line-of-sight (LOS) path loss in street microcell environments. The excess loss represents the effects of shadowing obstacles. We measure the path loss at the 3.35, 8.45, and 15.75 GHz frequencies in an urban environment, and analyze the distance characteristics of the pass loss for mobile antenna heights of 2.7, 1.6, and 0.5 m. Results show that using a new model that bases on a dα formula instead of d2 in the conventional model produced a better fit to the measured data. They also show that lowering the mobile antenna to a height of 0. 5 m made it possible to virtually ignore the excess loss factor and, instead, use the dα formula to assess the path loss characteristics.
ER -