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
Struktur perambatan berbilang laluan dalam persekitaran komunikasi mudah alih bandar jalur 25 GHz telah diukur melalui "peralatan pengukuran parameter perambatan berbilang laluan" yang baru dibangunkan, yang mampu menganggarkan DOA (Arah Ketibaan) berganding, TOA (Time Of Ketibaan) dan kekuatan medan relatif dengan teknik resolusi super. Sebelum pengukuran, prestasi asas peralatan telah dinilai dalam ruang anechoic untuk memastikan had pada pengukuran. Untuk amalan dan pengesahan ciri penyebaran luar, data asas telah dikumpul dalam kerja di mana bangunan yang tepat dan susun atur jalan diketahui. Selepas itu, data telah dikumpul dalam persekitaran komunikasi mudah alih bandar dan ciri-ciri berikut telah disahkan. 1) DOA dan TOA gelombang yang dipantulkan oleh sisi bangunan hampir mengikut jejak sinar. 2) Pokok jalanan menjadikan gelombang jalur 25 GHz melemahkan. 3) Terdapat kes-kes luar biasa yang mungkin untuk berkomunikasi walaupun di luar penglihatan melalui penyebaran berbilang laluan. 4) Jalan sempit mempunyai struktur penyebaran yang sangat rumit. Akhir sekali, teknologi yang perlu dibangunkan untuk komunikasi mudah alih digital berkelajuan tinggi dicadangkan berdasarkan hasil pengukuran.
Yoshihiko KUWAHARA
Yoshimitsu IKI
Kazuo NAGAO
Shuichi OBAYASHI
Keishi MURAKAMI
Akio SATO
Shoichiro KAWAMURA
Masaharu HATA
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Salinan
Yoshihiko KUWAHARA, Yoshimitsu IKI, Kazuo NAGAO, Shuichi OBAYASHI, Keishi MURAKAMI, Akio SATO, Shoichiro KAWAMURA, Masaharu HATA, "DOA/TOA Measurement of 25 GHz Band for Urban Mobile Radio" in IEICE TRANSACTIONS on Communications,
vol. E82-B, no. 12, pp. 1974-1986, December 1999, doi: .
Abstract: Multi-path propagation structure in the urban mobile communication environment of 25 GHz band has been measured by means of newly developed "multi-path propagation parameter measurement equipment," which is capable of estimating coupled DOA (Direction Of Arrival), TOA (Time Of Arrival) and relative field strength by super resolution techniques. Before measurement, basic performance of the equipment has been evaluated in the anechoic chamber in order to ascertain limitation on measurement. For practice and verification of outdoor propagation characteristics, basic data have been collected in a works where accurate buildings and road layout is known. Sub-sequently, data have been collected in the urban mobile communication environment and following characteristics have been confirmed. 1) DOA and TOA of wave reflected by the side of building almost follow the ray-trace. 2) Street trees make 25 GHz band wave attenuate. 3) There are such unusual cases that it is possible to communicate in spite of out of line-of-sight by multi-path propagation. 4) Narrow streets have very complicated propagation structures. Finally, technologies that should be developed for the high-speed digital mobile communication are proposed based on the measurement results.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e82-b_12_1974/_p
Salinan
@ARTICLE{e82-b_12_1974,
author={Yoshihiko KUWAHARA, Yoshimitsu IKI, Kazuo NAGAO, Shuichi OBAYASHI, Keishi MURAKAMI, Akio SATO, Shoichiro KAWAMURA, Masaharu HATA, },
journal={IEICE TRANSACTIONS on Communications},
title={DOA/TOA Measurement of 25 GHz Band for Urban Mobile Radio},
year={1999},
volume={E82-B},
number={12},
pages={1974-1986},
abstract={Multi-path propagation structure in the urban mobile communication environment of 25 GHz band has been measured by means of newly developed "multi-path propagation parameter measurement equipment," which is capable of estimating coupled DOA (Direction Of Arrival), TOA (Time Of Arrival) and relative field strength by super resolution techniques. Before measurement, basic performance of the equipment has been evaluated in the anechoic chamber in order to ascertain limitation on measurement. For practice and verification of outdoor propagation characteristics, basic data have been collected in a works where accurate buildings and road layout is known. Sub-sequently, data have been collected in the urban mobile communication environment and following characteristics have been confirmed. 1) DOA and TOA of wave reflected by the side of building almost follow the ray-trace. 2) Street trees make 25 GHz band wave attenuate. 3) There are such unusual cases that it is possible to communicate in spite of out of line-of-sight by multi-path propagation. 4) Narrow streets have very complicated propagation structures. Finally, technologies that should be developed for the high-speed digital mobile communication are proposed based on the measurement results.},
keywords={},
doi={},
ISSN={},
month={December},}
Salinan
TY - JOUR
TI - DOA/TOA Measurement of 25 GHz Band for Urban Mobile Radio
T2 - IEICE TRANSACTIONS on Communications
SP - 1974
EP - 1986
AU - Yoshihiko KUWAHARA
AU - Yoshimitsu IKI
AU - Kazuo NAGAO
AU - Shuichi OBAYASHI
AU - Keishi MURAKAMI
AU - Akio SATO
AU - Shoichiro KAWAMURA
AU - Masaharu HATA
PY - 1999
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E82-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 1999
AB - Multi-path propagation structure in the urban mobile communication environment of 25 GHz band has been measured by means of newly developed "multi-path propagation parameter measurement equipment," which is capable of estimating coupled DOA (Direction Of Arrival), TOA (Time Of Arrival) and relative field strength by super resolution techniques. Before measurement, basic performance of the equipment has been evaluated in the anechoic chamber in order to ascertain limitation on measurement. For practice and verification of outdoor propagation characteristics, basic data have been collected in a works where accurate buildings and road layout is known. Sub-sequently, data have been collected in the urban mobile communication environment and following characteristics have been confirmed. 1) DOA and TOA of wave reflected by the side of building almost follow the ray-trace. 2) Street trees make 25 GHz band wave attenuate. 3) There are such unusual cases that it is possible to communicate in spite of out of line-of-sight by multi-path propagation. 4) Narrow streets have very complicated propagation structures. Finally, technologies that should be developed for the high-speed digital mobile communication are proposed based on the measurement results.
ER -