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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS | 2023-10-19 14:05 |
Kagawa | Kagawa University (Saiwai-cho Campus), and online (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Research for Wide-Area Expansion of User-Centric RAN Using Cell-Free Massive MIMO Takahide Murakami, Yu Tsukamoto, Reo Kohinata, Naoki Aihara, Akio Ikami, Hiroyuki Shinbo, Yoshiaki Amano (KDDI Research)  RCS2023-133 |
Cell-Free massive MIMO (cell-free) is attracting attention as a technology that can ensure wireless quality regardless o... [more] | RCS2023-133 p.26 |
| RCS, SR, SRW (Joint) |
2023-03-01 16:05 |
Tokyo | Tokyo Institute of Technology, and Online (Primary: On-site, Secondary: Online) |
Neural Network Based Wideband Digtial Post-distortion for Virtualized Terminal Taishi Watanabe, Takeo Ohseki, Yoshiaki Amano (KDDI Research, Inc.) RCS2022-262 |
A virtualised terminal consisting of a normal user terminal and multiple RF relay devices that perform frequency conver... [more] |
RCS2022-262 pp.88-93 |
| RCS, SR, SRW (Joint) |
2023-03-03 16:40 |
Tokyo | Tokyo Institute of Technology, and Online (Primary: On-site, Secondary: Online) |
A Study on Analog Beam Selection and Digital Beam Design for Millimeter-wave Cell-Free Massive MIMO Shunsuke Kamiwatari, Issei Kanno, Yoshiaki Amano (KDDI Research), Kengo Ando, Shuto Fukue, Koji Ishibashi (UEC) RCS2022-297 |
Cell-Free Massive MIMO (CF mMIMO) has gained much attention as one of potential technologies for Beyond 5G (B5G) whereas... [more] | RCS2022-297 pp.261-266 |
| AP | 2023-02-17 09:30 |
Miyagi | Tohoku University, Aobayama Campus (Primary: On-site, Secondary: Online) |
AP2022-220 |
(To be available after the conference date) [more] | AP2022-220 pp.127-132 |
| RCS, NS (Joint) |
2022-12-16 15:50 |
Aichi | Nagoya Institute of Technology, and Online (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Standardization of NR network-controlled repeater in 3GPP and research on coverage expansion techniques in millimeter-wave bands Takeo Ohseki, Ryochi Kataoka, Masahiro Takigawa, Taishi Watanabe, Yoshiaki Amano (KDDI Research) NS2022-149 RCS2022-207 |
In the access links of mobile communications system, RF repeaters and relaying nodes have been considered as a means to ... [more] | NS2022-149 RCS2022-207 p.87(NS), p.98(RCS) |
| RCS, AP, UWT (Joint) |
2022-11-17 10:20 |
Fukuoka | Kyushu University, and Online (Primary: On-site, Secondary: Online) |
A study on relaying achieving low latency and high capacity in the millimeter wave bands Masahiro Takigawa, Ryochi Kataoka, Takeo Ohseki, Taishi Watanabe, Yoshiaki Amano (KDDI Research, Inc.) RCS2022-176 |
This paper evaluates the link-level throughput characteristics when Line-of-Sight MIMO(LoS-MIMO) is applied between a re... [more] | RCS2022-176 pp.124-129 |
| RCS | 2022-10-27 12:30 |
Ehime | Ehime University, and online (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Research Activities for Deploying Cell-Free Massive MIMO Systems Masaaki Ito (KDDI Research/USC), Shunsuke Kamiwatari, Noboru Osawa, Issei Kanno, Yoshiaki Amano (KDDI Research) RCS2022-132 |
In cell-free massive MIMO systems, a massive number of distributed antennas cooperate with each other and communicate wi... [more] | RCS2022-132 p.25 |
| MIKA (3rd) |
2022-10-13 11:10 |
Niigata | Niigata Citizens Plaza (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Basic Performance Evaluation of Low Latency and High Capacity Relay Technology in the Millimeter Wave Band Ryochi Kataoka, Masahiro Takigawa, Takeo Ohseki, Taishi Watanabe, Yoshiaki Amano (KDDI Research) |
[more] | |
| AP | 2022-06-16 14:25 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Primary: On-site, Secondary: Online) |
Development of automotive 5G throughput simulator Kazumasa Sakurai (SOKEN), Takuya Sawaya (TMC), Yoshiaki Amano (KDDI Research), Yuki Shida (KDDI) AP2022-32 |
(To be available after the conference date) [more] | AP2022-32 pp.17-21 |
| 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 |
| AP | 2022-03-10 10:55 |
Online | Online | AP2021-183 |
From microwaves to terahertz waves, the directivity and gain were investigated by electromagnetic field simulation when ... [more] | AP2021-183 pp.12-16 |
| SAT | 2021-10-07 14:20 |
Online | Online | PROPOSAL FOR A USER-CENTRIC RAN ARCHITECTURE TOWARDS BEYOND 5G Kosuke Yamazaki, Takeo Ohseki, Yoshiaki Amano, Takahide Murakami, Hiroyuki Shinbo, Yoji Kishi (KDDI Research, Inc.) SAT2021-43 |
In this paper, we present a novel RAN architecture for Beyond 5G called “user-centric (UC) RAN architecture,” which prov... [more] | SAT2021-43 pp.4-10 |
| AP | 2021-06-17 13:50 |
Online | Online | Prototype of Multi band orthogonal polarization and Angle MIMO antenna in cellular system Masayuki Nakano, Yoshiaki Amano (KDDI Research, Inc) AP2021-21 |
We devised a small, low-profile multi-band MIMO antenna for cellular band such as indoor base stations that supports m... [more] |
AP2021-21 pp.13-18 |
| EID, ITE-IDY, IEIJ-SSL, SID-JC, IEE-EDD [detail] | 2021-01-29 10:10 |
Online | Online | Effect of Doping Self-assembled Dendrimer to Thick Liquid Crystal for Microwave-band Phase Shifters Yoichi Murakami, Yosei Shibata, Hiroyasu Sato, Takahiro Ishinabe (Tohoku Univ.), Hiromi Matsuno, Yoshiaki Amano (KDDI), Qiang Chen, Hideo Fujikake (Tohoku Univ.) |
[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 |
| 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) |
| AP, WPT (Joint) |
2014-10-16 12:55 |
Hokkaido | Hokkaido University, Clark Memorial Student Center | Frequency Characteristics of Path Loss in Street Cell Environment Toru Kitayabu, Hiromi Matsuno, Yoshiaki Amano, Masayuki Nakano, Akira Yamaguchi (KDDI Labs.) AP2014-116 |
In this paper, path losses are measured in 3.5 GHz, 870 MHz and 2115 MHz, respectively. The measurement results are comp... [more] | AP2014-116 pp.43-47 |
| AP, WPT (Joint) |
2014-10-17 13:55 |
Hokkaido | Hokkaido University, Clark Memorial Student Center | Experimental Investigation of Glass Loss for Indoor-to-outdoor Propagation Hiromi Matsuno, Toru Kitayabu, Yoshiaki Amano, Masayuki Nakano, Akira Yamaguchi (KDDI R&D Labs) AP2014-125 |
In this paper, the experimental evaluation of indoor-to-outdoor propagation in 3.5GHz, 2.115GHz, and 870MHz is employed.... [more] | AP2014-125 pp.93-97 |
| AP, WPT (Joint) |
2014-10-17 14:20 |
Hokkaido | Hokkaido University, Clark Memorial Student Center | Field Experiments on MIMO Antennas for Small Cell Base Stations in 3.5GHz Band Yoshiaki Amano, Toru Kitayabu, Hiromi Matsuno, Masayuki Nakano, Akira Yamaguchi (KDDI R&D) AP2014-126 |
Small cells have attracted a lot of attention to improve data throughput and frequency utilization efficiency for the 4t... [more] | AP2014-126 pp.99-103 |
| RCS, AP (Joint) |
2013-11-22 11:35 |
Shimane | Matsue Terrsa | Performance Evaluation of Distributed MIMO Antenna for Mobile Terminals Tomohiro Sato, Masaharu Takahashi, Koichi Ito (Chiba Univ.), Yoshiaki Amano, Masayuki Nakano, Akira Yamaguchi (KDDI Labs) AP2013-121 |
Recently, MIMO transmission systems are in practical use for realizing high speed and reliable wireless communications. ... [more] | AP2013-121 pp.123-126 |
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