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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| AP | 2025-02-21 15:40 |
Aichi | Toyohashi Univ. of Technology (Aichi, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
A Study on Impact of Training Data Accuracy on Radio Propagation Models using Machine Learning Tatsuya Nagao, Takahiro Hayashi (KDDI Research, Inc.) |
[more] | |
| AP | 2024-12-12 13:00 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Human body loss characteristics of finite integral and ray trace methods in the 2GHz~300GHz band Masayuki Nakano, Kazuki Takezawa, Tatsuya Nagao, Takahiro Hayasyi (KDDI Research)  AP2024-160 |
The human body loss was calculated from 2 GHz to 300 GHz using the finite integral and ray trace methods, and the shie... [more] |
AP2024-160 pp.1-5 |
| RCS, AP (Joint) |
2024-11-13 15:35 |
Ishikawa | (Ishikawa, Online) (Primary: On-site, Secondary: Online) |
[Tutorial Lecture]
Research and development of user-centric networks for 6G Takahiro Hayashi, Yu Tsukamoto, Tatsuya Nagao, Issei Kanno, Yoshiaki Amano (KDDI Research, Inc) AP2024-143 |
With the launch of 5G services, characterized by high speed and capacity, high reliability with low latency, and massive... [more] | AP2024-143 pp.44-49 |
| AP | 2024-10-16 17:20 |
Fukuoka | ACROS Fukuoka (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
Experimental Validation of Liquid Crystal Metasurface Reflector in Indoor Millimeter-wave System Hiroki Aoki, Takuya Ohto, Tatsuya Nagao, Takahiro Hayashi (KDDI Research, Inc.), Kazuki Matsunaga, Masayuki ikari, Daijiro Takano, Mitsutaka Okita, Shinichiro Oka (JDI) AP2024-60 |
The liquid crystal metasurface reflector is a promising technology for overcoming the coverage hole problem in millimete... [more] | AP2024-60 pp.24-29 |
| AP | 2024-10-17 12:50 |
Fukuoka | ACROS Fukuoka (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Propagation loss estimation by machine learning using both simulated data by ray-trace method and measured data Kazuki Yuasa, Rento Hagiwara, Koichi Ichige (Yokohama National Univ.), Keiji Yoshikawa, Tatsuya Nagao, Takahiro Hayashi (KDDI) AP2024-124 |
[more] | AP2024-124 pp.191-196 |
| AP, SANE, SAT (Joint) |
2024-07-25 14:40 |
Hokkaido | Frontier Research in Applied Sciences Building, Hokkaido University (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
A Study on 300GHz Band Propagation Loss Modeling in the Vicinity of the Human Body Considering the Effect of Cloth Kazuki Takezawa, Satoshi Ito, Tatsuya Nagao (KDDI Research) AP2024-41 |
[more] | AP2024-41 pp.106-111 |
| AP | 2024-06-13 13:55 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Generation of Virtual City 3D Model and Analysis of Pathloss Distribution Rento Hagiwara, Koichi Ichige (Yokohama National Univ), Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2024-18 |
We propose a method of generating virtual city 3D model of which the building occupancy rate is adjustable, and analyze ... [more] | AP2024-18 pp.7-12 |
| MIKA (3rd) |
2024-06-11 14:40 |
Niigata | Niigata University Station South Campus Tokimeito Conference Room A (Niigata) | [Invited Talk]
Research and development for millimeter wave area improvement in the B5G/6G Ryochi Kataoka, Masahiro Takigawa, Takeshi Oomori, Issei Kanno, Takuya Ohto, Hiromi Matsuno, Tatsuya Nagao (KDDI Research) |
In Japan, the 5th generation mobile communication system (5G) became commercially available in March 2020. The use of mi... [more] | |
| RCS, SR, SRW (Joint) |
2024-03-15 13:50 |
Tokyo | The University of Tokyo (Hongo Campus), and online (Tokyo, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Radio Channel Emulation in Cyber-Physical Wireless Emulator Jun-ichi Takada, Nopphon Keerativoranan (Tokyo Tech), Tatsuya Nagao, Takahiro Hayashi (KDDI Research), Minseok Kim (Niigata Univ.), Yukiko Kishiki, Kenshi Horihata, Gilbert Sih Ching, Kento Sugiyama (KKE), Kentaro Saito (Tokyo Tech), Tetsuro Imai, Miyuki Hirose (TDU), Azril Haniz, Hirokazu Sawada, Takeshi Matsumura (NICT) SRW2023-74 |
This report presents a specific implementation of radio channel emulation techniques and data in the cyber-physical wire... [more] | SRW2023-74 pp.106-111 |
| AP | 2024-02-16 15:25 |
Mie | Sinfonia Technology Hibiki Hall Ise (Mie, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
A Beam Switching Algorithm Combining Terahertz Band Antennas and IMU Using Particle Filter Michihiro Harada, Tatsuya Nagao, Satoshi Ito, Takahiro Hayashi (KDDI Research) AP2023-198 |
(To be available after the conference date) [more] | AP2023-198 pp.56-61 |
| AP, WPT (Joint) |
2024-01-19 15:25 |
Niigata | Tokimate, Niigata University (Niigata, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Radio Propagation Modeling Using CNN with Rectangular Map Data Tatsuya Nagao, Takahiro Hayashi (KDDI Research, Inc.) AP2023-184 |
Recently, machine learning-based methods using environmental information as features have been proposed to model site-sp... [more] | AP2023-184 pp.126-130 |
| AP, WPT (Joint) |
2024-01-19 15:50 |
Niigata | Tokimate, Niigata University (Niigata, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Generation of Virtual City 3D Model for Pathloss Dataset Extension Rento Hagiwara, Koichi Ichige (Yokohama National Univ), Tatsuya Nagao, Takahiro Hyashi (KDDI Research Inc.) AP2023-185 |
In this paper, we propose a method to generate a 3D model of virtual cities for propagation data generation by ray traci... [more] | AP2023-185 pp.131-136 |
| AP | 2023-05-12 10:00 |
Okinawa | Okinawa Gender Equality Center (Okinawa, Online) (Primary: On-site, Secondary: Online) |
A Study on Radio Propagation Modeling using RNN-Encoder with Variable-Size Map Data Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2023-17 |
For efficient evaluation of the performance of wireless systems in physical space, wireless emulation techniques in virt... [more] | AP2023-17 pp.48-53 |
| RCC, ISEC, IT, WBS | 2023-03-15 11:00 |
Yamaguchi | (Yamaguchi, Online) (Primary: On-site, Secondary: Online) |
[Invited Talk]
Virtualized terminal utilizing the terahertz band for high-capacity communications toward Beyond 5G/6G Takahiro Hayashi, Yoshio Kunisawa, Tatsuya Nagao, Kazuki Takezawa, Satoshi Ito, Hiromi Matsuno, Yoji Kishi (KDDI Research, Inc) IT2022-110 ISEC2022-89 WBS2022-107 RCC2022-107 |
In the 2030s, when Beyond 5G/6G is expected to be realized, a cyber-physical system (CPS) that integrates physical and c... [more] | IT2022-110 ISEC2022-89 WBS2022-107 RCC2022-107 pp.263-268 |
| AP | 2023-02-15 14:15 |
Miyagi | Tohoku University, Aobayama Campus (Miyagi, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
A Study of Angle Estimation Algorithm Using Multibeam Antenna for THz Short-Range Mobile Communication
-- Evaluation of Estimation Accuracy Near the Antenna -- Hiromi Matsuno, Tatsuya Nagao, Takahiro Hayashi (KDDI Research) AP2022-205 |
[more] | AP2022-205 pp.46-51 |
| RCS, AP, UWT (Joint) |
2022-11-16 15:35 |
Fukuoka | Kyushu University, and Online (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Experimental Evaluation of Intelligent Reflecting Surface (IRS) for Beyond 5G /6G Mobile Communication Systems
-- Scattering Pattern and Path-Loss -- Hiromi Matsuno, Takuya Ohto, Michihiro Harada, Tatsuya Nagao, Takahiro Hayashi (KDDI Research, Inc.) AP2022-157 RCS2022-171 |
[more] | AP2022-157 RCS2022-171 pp.57-61(AP), pp.96-100(RCS) |
| AP, MW (Joint) |
2022-09-14 14:40 |
Ehime | The Museum of Art, EHIME (Ehime, Online) (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 (Ehime, Online) (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 (Ehime, Online) (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 |
| AP, SANE, SAT (Joint) |
2021-07-29 12:40 |
Online | 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 |
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