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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| AP, MW (Joint) |
2022-09-15 15:05 |
Ehime | The Museum of Art, EHIME (Primary: On-site, Secondary: Online) |
Radio Propagation Prediction using Fine-Tuning method with Few Data 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 |
| 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) |
| AP | 2013-06-13 13:00 |
Tokyo | Kikai-Shinko-Kaikan Bldg. | A Study of Experiment for 2D-DOA Estimation under LOS Environment by Using Pyramid Shaped Array Antenna Yusuke Hori, Yuki Doi, Hiroki Moriya, Koichi Ichige, Hiroyuki Arai (YNU), Hiromi Matsuno, Takahiro Hayashi, Masayuki Nakano (KDDI R&D LABS) AP2013-35 |
[more] | AP2013-35 pp.1-6 |
| RCS | 2013-04-18 15:15 |
Okinawa | Ishigaki City Hall | JT-CoMP performance evaluation in different cell densities Takahiro Hayashi, Toru Kitayabu, Shinobu Nanba (KDDI R&D Labs) RCS2013-10 |
[more] | RCS2013-10 pp.55-59 |
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