Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
SAT, SANE (Joint) |
2024-02-09 10:45 |
Kagoshima |
AmaHome PLAZA (Amami City Shimin Koryu Center) (Primary: On-site, Secondary: Online) |
A study on the rain attenuation statistics using the different Ku-band satellite signals measured at multiple locations Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), Koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT) SAT2023-71 |
The signal levels of Ku-band BS broadcast radio wave and JCSAT-5A beacon radio wave have been simultaneously measured at... [more] |
SAT2023-71 pp.63-68 |
MICT, WBS, RCC, SAT (Joint) [detail] |
2023-05-26 09:25 |
Tokyo |
TOKYO BIG SIGHT (Primary: On-site, Secondary: Online) |
A study on the rain attenuation duration characteristics using the different Ku-band satellite signals measured at multiple locations Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), Koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT Corporation) SAT2023-5 MICT2023-5 |
The signal levels of Ku-band BS broadcast radio waves and JCSAT-5A beacon radio waves have been simultaneously measured ... [more] |
SAT2023-5 MICT2023-5 pp.20-25 |
SAT, KOSST |
2022-10-06 16:55 |
Fukuoka |
(Primary: On-site, Secondary: Online) |
A study on Site Diversity Effect between Different Satellites using Rain Attenuation Characteristics of Ku-band Satellite Communication Links Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), Koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT) SAT2022-48 |
The signal levels of Ku-band BS broadcast radio waves and JCSAT-5A beacon radio waves have been simultaneously measured ... [more] |
SAT2022-48 pp.20-24 |
RCS, SR, SRW (Joint) |
2022-03-03 14:55 |
Online |
Online |
[Invited Lecture]
Expectations for Terahertz Radio Iwao Hosako (NICT) RCS2021-281 SR2021-108 SRW2021-81 |
Beyond 5G/6G discussions have begun, and various white papers have expressed expectations for the utilization of the ter... [more] |
RCS2021-281 SR2021-108 SRW2021-81 pp.143-154(RCS), pp.101-112(SR), pp.49-60(SRW) |
WBS, RCC, ITS |
2021-12-13 13:30 |
Online |
Online |
LoRa Radio Propagation Characteristics over Pseudo-sea Path and their Measurement Systems Yusuke Kakimoto, Shinji Tsuzuki, Masashi Sugimoto (Ehime Univ.), Huan-Bang Li (NICT), Kazuhiko Nagao (National Institute of Technology, Yuge College) WBS2021-46 ITS2021-20 RCC2021-53 |
A wireless system using LoRa (Long Range; 920 MHz band; less than 20 mW), which is a kind of LPWA (Low Power Wide Area) ... [more] |
WBS2021-46 ITS2021-20 RCC2021-53 pp.71-75 |
AP |
2021-10-07 09:00 |
Online |
Online |
[Tutorial Lecture]
A Study on the Measurement and Estimation Methods of Rain Attenuation Characteristics in Satellite Communications Links Yasuyuki Maekawa (Osaka Electro-Commun. Univ.) AP2021-68 |
Rain attenuation characteristics of Ka and Ku band satellite communication links are presented using the domestic CS (19... [more] |
AP2021-68 pp.1-6 |
AP |
2021-03-26 14:00 |
Online |
Online |
[Tutorial Lecture]
International standardization status of HAPS propagation model Hideki Omote, Shoma Tanaka, Sho Kimura, Hoyu Lin, Akihiro Sato (Softbank) AP2020-140 |
HAPS (High-Altitude Platform Station) is a radio station installed on an Unmanned Aerial Vehicle (UAV), such as a balloo... [more] |
AP2020-140 pp.48-53 |
SR |
2020-11-20 10:00 |
Online |
Online |
Compensation of Clutter Loss Considering Antenna Height Difference and Dominant Path for Spectrum Sharing Sunao Miyamoto, Keita Katagiri (UEC), Koya Sato (TUS), Koichi Adachi, Takeo Fujii (UEC) SR2020-39 |
In recent years, spectrum sharing technology is attracting attention to solve the problem of spectrum shortage. In order... [more] |
SR2020-39 pp.108-113 |
SAT |
2019-10-11 09:50 |
Fukuoka |
JR HAKATA CITY {10F RoomA+B} |
A Comparison between Long-term Rain Attenuation Statistics and ITU-R Prediction Methods in Ku-Band Satellite Links Kosuke Yamasaki, Yasuyuki Maekawa (Osaka Electro-Comm. Univ.) SAT2019-57 |
A remarkable increasing tendency of yearly rain attenuation statistics of cumulative time percentages is obtained from l... [more] |
SAT2019-57 pp.61-64 |
MW (2nd) |
2019-06-26 - 2019-06-28 |
Overseas |
RUS, Bangkok, Thailand |
[Invited Talk]
[Invited] Study on Spectrum in the Frequency Range 100-450 GHz at ITU-R Hiroyo Ogawa (NICT) |
The activities on spectrum studies in the frequency range 100-450GHz at ITU-R are overviewed including the agenda items ... [more] |
|
MW, ICD |
2019-03-14 16:15 |
Okinawa |
|
[Invited Talk]
Work on spectrum in the frequency range 100-450 GHz at ITU-R Hiroyo Ogawa (NICT) MW2018-167 ICD2018-111 |
The activities in the frequency range 100-450GHz at ITU-R is overviewed and the agenda items above 100 GHz to be discuss... [more] |
MW2018-167 ICD2018-111 pp.61-66 |
AP |
2018-05-17 13:05 |
Kumamoto |
Kumamoto Univ. |
Antenna Height Dependency of Clutter Loss for An Isolated Building by Measurement in Multi-Frequency Bands using A Drone Motoharu Sasaki, Mitsuki Nakamura, Nobuaki Kuno, Yasushi Takatori (NTT) AP2018-18 |
In the three frequency bands of 2.2 GHz, 4.7 GHz, and 26.4 GHz, the clutter loss caused by an isolated building was meas... [more] |
AP2018-18 pp.29-33 |
RCS, NS (Joint) |
2017-12-14 14:20 |
Hiroshima |
Aster Plaza |
[Invited Lecture]
Overview on 5G Requirements and Potential Evolution Directions Toward B5G Anass Benjebbour, Yoshihisa Kishiyama (NTT DOCOMO) NS2017-129 RCS2017-255 |
Standardization of the new radio interface for fifth generation mobile communications systems (5G) is advancing at the 3... [more] |
NS2017-129 RCS2017-255 pp.19-24(NS), pp.31-36(RCS) |
SAT |
2017-10-26 11:25 |
Okinawa |
Okinawa Cellular Telephone Company |
Interference monitoring scheme using feature detection between satellite and cellular systems (28 GHz) Kanshiro Kashiki, Tomoki Sada (KDDI Research), Akihide Nagamine, Fumio Watanabe (Titec) SAT2017-42 |
This manuscript presents study results for an interference monitoring scheme between satellite and cellular systems in t... [more] |
SAT2017-42 pp.23-28 |
RCS |
2017-10-20 15:50 |
Miyagi |
Tohoku Institute of Technology |
Radio regulations and provisions in the 90-GHz band spectrum Hiroyo Ogawa, Tetsuya Kawanishi, Atsushi Kanno, Naokatsu Yamamoto (NICT) RCS2017-199 |
Frequency usage of 90-GHz band is proposed as new spectrum for the mobile services which mitigates congestion of radio f... [more] |
RCS2017-199 pp.173-175 |
SRW |
2016-12-19 14:25 |
Tokyo |
Tokyo City Univ., Setagaya Campus |
[Invited Talk]
An Activity of ITU-R SG3 for Millimeter-wave usage in Fifth-Generation Mobile Communication Systems Motoharu Sasaki, Minoru Inomata, Wataru Yamada, Yasushi Takatori (NTT) SRW2016-64 |
To discuss a frequency allocation for new wireless communication systems, a study of the frequency sharing and interfere... [more] |
SRW2016-64 pp.43-47 |
SRW |
2016-12-19 15:15 |
Tokyo |
Tokyo City Univ., Setagaya Campus |
[Invited Talk]
* Iwao Hosako (NICT) SRW2016-65 |
We report the background, standardization trends, the situation of R & D program being promoted in each country, etc. ab... [more] |
SRW2016-65 pp.49-50 |
MW |
2014-11-21 13:30 |
Nagasaki |
Nagasaki Univ. |
[Invited Lecture]
Development and Field Trial Result of VHF Wireless System for Network Business Operation Kiyohiko Itokawa, Fusao Nuno, Nobuhiko Tachikawa, Fumiaki Nagase, Junichi Iwatani, Teruyoshi Shinagawa, Hiroki Yoshioka, Takahiro Tsuchiya, Toshiyuki Shintaku (NTT) MW2014-142 |
NTT has utilized various wireless systems to resume network facilities rapidly in a wide area of disaster and we have de... [more] |
MW2014-142 pp.101-106 |
SR |
2014-10-30 15:00 |
Overseas |
I2R, Singapore |
[Requested Talk] Challenges towards 100Gbit/s wireless using THz bands
-- Progresses on device technology, standardization at IEEE802.15, and regulatory issues related to ITU-R -- Iwao Hosako, Akifumi Kasamatsu, Norihiko Sekine, Hiroyo Ogawa (NICT) SR2014-74 |
This presentation overviews technical challenges towards 100Gbit/s wireless using THz bands, including progresses on dev... [more] |
SR2014-74 pp.81-88 |
MW (Workshop) |
2012-08-08 - 2012-08-10 |
Overseas |
Chulalongkorn University, Bangkok, Thailand |
[Invited Talk]
Standardization activities on microwave and millimeter-wave related issues within APT and ITU-R Hiroyo Ogawa (ARIB) |
APT and ITU-R are working on standardization of microwave and millimeter-wave related systems from terrestrial to satell... [more] |
|