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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 38  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS, AP, UWT
(Joint)
2022-11-16
15:35
Fukuoka Kyushu University, and Online
(Primary: On-site, Secondary: Online)
[Invited Lecture] Experimental study of intelligent reflecting surface for beyond 5G and 6G -- Evaluation of scattering pattern, propagation --
Hiromi Matsuno, Takuya Ohto, Michihiro Harada, Tatsuya Nagao, Takahiro Hayashi (KDDI Research, Inc.)
 [more]
AP, MW
(Joint)
2022-09-14
14:40
Ehime The Museum of Art, EHIME
(Primary: On-site, Secondary: Online)
A Study of Building Map Representation for Spatiotemporal Channel Parameters Estimation Model by Machine Learning
Keiji Yoshikawa, Tatsuya Nagao, Kazuki Takezawa, Takahiro Hayashi (KDDI Research, Inc) AP2022-78
Wireless emulators are being developed to design and evaluate wireless systems in virtual space. To emulate various envi... [more] AP2022-78
pp.38-43
AP, MW
(Joint)
2022-09-15
14:40
Ehime The Museum of Art, EHIME
(Primary: On-site, Secondary: Online)
A Study on Radio Propagation Characteristics at 100 GHz Band between the User Equipment and a Wearable Device
Kazuki Takezawa, Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2022-81
 [more] AP2022-81
pp.56-61
AP, MW
(Joint)
2022-09-15
15:05
Ehime The Museum of Art, EHIME
(Primary: On-site, Secondary: Online)
Radio Propagation Modeling with Few Data using Fine-Tuning
Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2022-82
Wireless communication systems, such as Beyond 5G, are expected to be essential social infrastructure, and numerous devi... [more] AP2022-82
pp.62-67
RCS 2022-06-15
09:55
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Simulation Evaluation of Millimeter Wave Cell Free massive MIMO for Realistic Deployment Environment
Shunsuke Kamiwatari, Issei Kanno, Takahiro Hayashi, Yoshiaki Amano (KDDI Research, Inc.) RCS2022-25
Cell-free massive MIMO (CF mMIMO) is a candidate elemental technology for Beyond 5G. In this paper, we report the result... [more] RCS2022-25
pp.7-12
SRW 2021-08-24
14:15
Online Online [Invited Lecture] On the Radio Propagation Modeling for Advanced Wireless Emulator Based on Cyber Physical Fusion
Jun-ichi Takada, Nopphon Keerativoranan (Tokyo Tech), Takahiro Hayashi (KDDI Research), Minseok Kim (Niigata Univ), Yukiko Kishiki, Wataru Okamura (KKE), Kentaro Saito (Tokyo Tech), Tetsuro Imai, Miyuki Hirose (TDU), Hirokazu Sawada, Takeshi Matsumura (NICT) SRW2021-23
This report presents the radio propagation modeling technology for the implementation of advanced wireless emulator base... [more] SRW2021-23
pp.21-26
SRW 2021-08-24
14:40
Online Online [Invited Lecture] Radio Propagation Prediction using a Machine Learning toward Advanced Radio Emulation
Takahiro Hayashi, Nagao Tasuya (KDDI Research Inc.) SRW2021-24
 [more] SRW2021-24
pp.27-32
AP, SANE, SAT
(Joint)
2021-07-29
12:40
Online Online [Invited Lecture] Radio Propagation Prediction using Geographical Classification by Clustering and Convolutional Neural Network
Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2021-36
Beyond 5G is expected to play an essential role in the future social infrastructure, and there is a need for a new syste... [more] AP2021-36
pp.70-75
AP 2021-02-19
13:50
Online Online [Invited Lecture] Development and evaluation of metasurface reflector for coverage holes in mmWave mobile area
Hiromi Matsuno, Takuya Ohto, Satoshi Ito, Akio Ikami, Takahiro Hayashi (KDDI Research, Inc.) AP2020-127
 [more] AP2020-127
pp.62-67
AP 2020-12-17
13:50
Online Online A Study on Urban Structure Map Extraction for Radio Propagation Prediction using XGBoost
Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2020-98
Recently, the rapid increase in mobile data traffic and the diversification of wireless communication services have led ... [more] AP2020-98
pp.13-17
AP
(2nd)
2020-12-10
09:35
Okinawa Nobumoto Ohama Memorial Hall
(Primary: On-site, Secondary: Online)
Bistatic RCS Measurement of Dual Band and Dual Polarized Reflectarray
Cong Oai Nguyen, Kazuya Matsubayashi, Naobumi Michishita, Hisashi Morishita (National Defense Academy), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano (KDDI Research)
In the fifth generation wireless communication systems, high frequency band such as the 28 GHz is used to high data rate... [more]
SR 2020-11-18
10:00
Online Online A Study on Forecasting of Available Spectrum Resources for Sharing using Envelope Extraction and Machine Learning
Tatsuya Nagao, Takahiro Hayashi, Yoshiaki Amano (KDDI Research) SR2020-22
In recent years, the demand for spectrum resources has been increasing, which has raised expectations for dynamic spectr... [more] SR2020-22
pp.1-4
AP 2020-08-21
09:00
Online Online Dual Frequency and Polarized Reflectarray Using Cross Dipole and Patch Elements
Cong Oai Nguyen, Naobumi Michishita, Hisashi Morishita (Natinal Defense Acad.), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano (KDDI Research) AP2020-23
 [more] AP2020-23
pp.1-4
AP 2020-05-21
13:00
Okinawa Tiruru Okinawa (Naha-city)
(Cancelled, technical report was not issued)
Dual Frequency and Polarized Reflectarray Using Cross Dipole and Patch Elements
Cong Oai Nguyen, Naobumi Michishita, Hisashi Morishita (National Defense Acad.), Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi, Masayuki Nakano (KDDI Research)
 [more]
AP 2020-04-23
14:35
Mie Jingu-kaikan (Ise)
(Cancelled but technical report was issued)
Visible Light Transfer Meta-Surface Reflectors
Hiromi Matsuno, Satoshi Itou, Takahiro Hayashi, Masayuki Nakano (KDDI Research), Lin Wang, Yuko Rikuta (NIHON DENGYO KOSAKU) AP2020-3
 [more] AP2020-3
pp.13-17
RCS, SR, SRW
(Joint)
2020-03-04
15:00
Tokyo Tokyo Institute of Technology
(Cancelled but technical report was issued)
[Invited Talk] A Proposal of Dynamic Spectrum Sharing Architecture between different radio services and 5G system
Kosuke Yamazaki, Takahiro Hayashii, Yoshiaki Amano, Yoji Kishi (KDDI Research), Takeo Fujii, Koichi Adachi (UEC), Hiroshi Harada, Kei-ichi Mizutani (Kyoto Univ.), Jun-ichi Takada, Kentaro Saito (TIoT), Yasushi Fuwa, Osamu Takyu (Shinshu Univ.), Ryo Sawai, Ryota Kimura (SONY), Satoshi Baba, Hironori Kakefuda (NDK), Hideki Kanemoto, Takeshi Yasunaga (Panasonic) RCS2019-345 SR2019-120 SRW2019-66
To achieve highly efficient spectrum usage, we propose a novel spectrum management scheme to realize Dynamic Spectrum Sh... [more] RCS2019-345 SR2019-120 SRW2019-66
pp.137-142(RCS), pp.41-46(SR), pp.35-40(SRW)
US 2020-02-28
14:40
Tokyo   Energy trapping at a circumferential groove in a pipe
Takahiro hayashi (Osaka Univ.) US2019-103
 [more] US2019-103
pp.25-27
AP 2019-10-18
10:20
Osaka Osaka Univ. A Study of Meta-surface for Direction Control of Reflection
Hiromi Matsuno, Satoshi Ito, Takahiro Hayashi (KDDI Research) AP2019-99
 [more] AP2019-99
pp.101-106
AP 2019-10-18
13:00
Osaka Osaka Univ. A study on variety and size of input data for radio propagation prediction using a deep neural network
Takahiro Hayashi, Tatsuya Nagao, Satoshi Ito (KDDI Research, Inc) AP2019-102
Not only has the volume of mobile traffic been increasing exponentially in recent years, making various services availab... [more] AP2019-102
pp.119-124
US 2019-02-22
11:20
Kanagawa   Non-contact imaging inspection for plate-like structures by irradiating modulated laser
Takahiro Hayashi, Nakao Syogo, Takao Tanahara (Kyoto Univ.) US2018-110
In laser ultrasonics, pulse laser equipment is generally used for generating elastic wave in a material and the material... [more] US2018-110
pp.11-14
 Results 1 - 20 of 38  /  [Next]  
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