Committee |
Date Time |
Place |
Paper Title / Authors |
Abstract |
Paper # |
AP, SANE, SAT (Joint) |
2024-07-25 11:50 |
Hokkaido |
Frontier Research in Applied Sciences Building, Hokkaido University (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Evaluating Inter and Intra-System Interference in HAPS and 5G Coexistence at 2 GHz using 3D Cell Control Technology Yuto Muroki, Yuki Hokazono, Hinata Kohara, Atsunori Shimamura, Ozono Suzuki, Hirofumi Nakajo, Kenji Fukasawa (NTT DOCOMO), Hiromu Kitanozono (SKY Perfect JSAT) SAT2024-23 |
We focus on the provision of communication areas from the sky by satellites and high-altitude platform stations (HAPSs) ... [more] |
SAT2024-23 pp.46-51 |
AP, SANE, SAT (Joint) |
2024-07-25 12:10 |
Hokkaido |
Frontier Research in Applied Sciences Building, Hokkaido University (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Evaluating Inter and Intra-System Interference in HAPS and 5G Coexistence at 38 GHz using 3D Cell Control Technology Yuki Hokazono, Yuto Muroki, Atsunori Shimamura, Hinata Kohara, Megumi Ozono, Hirofumi Nakajo, Kenji Fukasawa (NTT DOCOMO INC.), Hiromu Kitanozono (SKY Perfect JSAT) SAT2024-24 |
The utilization of the wideband 38 GHz frequencies, as allocated at the 2019 World Radiocommunication Conference(WRC–19)... [more] |
SAT2024-24 pp.52-57 |
NS, RCS (Joint) |
2023-12-15 14:25 |
Fukuoka |
Kyushu Institute of Technology Tobata campus, and Online (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
Terminal Scheduling Method for Spectrum Sharing between Non-Terrestrial Networks and Terrestrial Networks using Radio Map Shugo Hirano, Hirofumi Nakajo, Takeo Fujii (UEC) RCS2023-201 |
With the proliferation of the Internet-of-Things (IoT) and cell phones, there is a need to provide high-speed communicat... [more] |
RCS2023-201 pp.123-128 |
SR, UWT (Joint) |
2023-01-27 14:35 |
Tokyo |
Takanawa Campus, Tokai Univ. (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Experimental Evaluation of Spectrum Database for Non-Terrestrial Networks Yusuke Itayama, Hirofumi Nakajo, Shougo Matsuo, Takeo Fujii (The Univ. of Electro-Communications) SR2022-80 |
[more] |
SR2022-80 pp.48-53 |
SR |
2022-11-07 15:30 |
Fukuoka |
Fukuoka University (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
[Technology Exhibit]
5D spectrum database Hirofumi Nakajo, Yusuke Itayama, Shougo Matsuo, Takeo Fujii (UEC) SR2022-56 |
A key issue in the research and development of next-generation mobile communication systems (Beyond 5G/6G) is the availa... [more] |
SR2022-56 pp.58-63 |
SAT, RCS (Joint) |
2022-08-26 09:50 |
Hokkaido |
(Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Beam Pattern Estimation Based on Radio Map and Multi-beam Antenna Model for 5G Transmitter at 28GHz Shougo Matsuo, Hirofumi Nakajo, Sunao Miyamoto, Fujii Takeo (UEC), Kenji Wakafuji, Ryota Nihei, Kohei Yoshida (NEC) RCS2022-120 |
Radio map attracts attention as a low computation cost and an accurate method for estimating radio propagation. Radio ma... [more] |
RCS2022-120 pp.132-137 |
NS, SR, RCS, SeMI, RCC (Joint) |
2022-07-15 14:30 |
Ishikawa |
The Kanazawa Theatre + Online (Ishikawa, Online) (Primary: On-site, Secondary: Online) |
Blockage prediction for millimeter-wave communications based on people flow data Hirofumi Nakajo, Takeo Fujii (UEC) SR2022-42 |
Thanks to the high bandwidth available at millimeter-wave (mmWave), mmWave communications support high data rates and la... [more] |
SR2022-42 pp.96-103 |
SR |
2021-05-21 14:00 |
Online |
Online (Online) |
[Technology Exhibit]
5G experimental trial based on smart spectrum Kenta Umebayashi, Hiroki Iwata (TUAT), Hirofumi Nakajo (UEC), Hikaru Kawasaki (NICT), Yusaku Babazono, Yoshinori Yahiro (TUAT), Takeo Fujii, Koichi Adachi, Taiki Matsushima (UEC), Yusuke Shibata (ECATV), Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima (NICT) SR2021-18 |
[more] |
SR2021-18 pp.120-127 |
SR |
2019-11-04 11:00 |
Overseas |
Rutgers University Inn & Conference Center, NJ, USA (Overseas) |
[Poster Presentation]
Adaptive band and power control for spectrum shared mobile systems Hirofumi Nakajo, Takeo Fujii (UEC) SR2019-73 |
In the 5th generation mobile communication systems (5G), carrier independent operators such as micro operator and local ... [more] |
SR2019-73 pp.25-26 |
SR |
2019-01-25 14:50 |
Fukushima |
Corasse, Fukushima city (Fukushima prefecture) (Fukushima) |
High Density Spectrum Sharing Method among Micro Operators considering Mesurement-based Spectrum Database Hirofumi Nakajo, Yuya Aoki, Keita Katagiri, Takeo Fujii (UEC) SR2018-115 |
In 5G, micro operator and local 5G concepts that arrange small cells with high flexibility and scalability attract atten... [more] |
SR2018-115 pp.117-122 |
SR |
2018-10-31 10:25 |
Overseas |
Mandarin Hotel, Bangkok, Thailand (Overseas) |
[Poster Presentation]
Spatial Spectrum Sharing among Micro Operators considering Distribution on Measurement-based Spectrum Database Hirofumi Nakajo, Yuya Aoki, Keita Katagiri, Takeo Fujii (UEC) SR2018-78 |
This paper proposes probabilistic protection of micro cells using measurement-based spectrum database. In the 5th genera... [more] |
SR2018-78 pp.45-46 |
ISEC, WBS, IT |
2017-03-09 16:15 |
Tokyo |
TOKAI University (Tokyo) |
Different Orthogonal Code DS/CDMA with High Spectral Efficiency and Evaluations by Interference Cancellation Using Indoor Radio Wave Intensity Distriburtion Hirofumi Nakajo, Shin'ichi Tachikawa (NIT, Nagaoka) IT2016-116 ISEC2016-106 WBS2016-92 |
High data rate and high spectral efficiency more than LTE can be obtained by different orthogonal codes DS/CDMA communic... [more] |
IT2016-116 ISEC2016-106 WBS2016-92 pp.109-113 |