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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 21 - 40 of 54 [Previous]  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
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
AP 2015-02-20
14:30
Hyogo Chusho-kigyou center at Amagasaki-City [Invited Lecture] The evaluation on the outdoor-to-indoor propagation loss prediction method for a low height antenna -- The prediction method for indoor by the street micro cell propagation mechanism --
Yuki Hirota, Shinobu Nanba, Takahiro Hayashi (KDDI Lab) AP2014-207
 [more] AP2014-207
pp.113-118
RCS, NS
(Joint)
2014-12-18
16:20
Mie Iseshi-Kanko-Bunka-Kaikan (Mie) [Invited Lecture] Efficient Transmission Scheme for C-RAN Fronthaul link
Shinobu Nanba, Akira Agata, Takahiro Hayashi (KDDI labs) NS2014-154 RCS2014-239
Due to a rise of both smartphones and tablets, mobile data traffic has been increasing rapidly. It is required to pionee... [more] NS2014-154 RCS2014-239
pp.43-48(NS), pp.115-120(RCS)
MWP, EMT, PN, LQE, OPE, EST, IEE-EMT [detail] 2014-01-23
16:50
Kyoto Doshisha University Influence of Harmonic Distortions of Driving Signal on Chirp Parameter Measurement of Mach-Zehnder Modulator
Takahiro Hayashi, Hiroyuki Toda (Doshisha university), Tetsuya Kawanishi (NICT) PN2013-47 OPE2013-161 LQE2013-147 EST2013-96 MWP2013-67
In this paper, we describe the influence of harmonic distortions of RF driving signal on chirp parameter measurement of ... [more] PN2013-47 OPE2013-161 LQE2013-147 EST2013-96 MWP2013-67
pp.69-73
MW 2013-11-21
15:00
Kagoshima Kagoshima Prefectural Culture Center Measurements on Anomalous Skin Effect at Room Temperature in 1THz Band
Takahiro Hayashi, Shotaro Nagai, Atsushi Sanada (Yamaguchi Uni.) MW2013-139
The anomalous skin effect at room temperature (T = 300 K) is observed by measuring a frequency dependence of the surface... [more] MW2013-139
pp.47-50
 Results 21 - 40 of 54 [Previous]  /  [Next]  
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