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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS, SR, SRW (Joint) |
2024-03-13 13:10 |
Tokyo | The University of Tokyo (Hongo Campus), and online (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Beamforming/Null-steering for Millimeter-wave Transmission in High Mobility Environment Kazuki Maruta, Yuki Sasaki, Sojin Ozawa (Tokyo Univ. of Science), Kazuto Arai (The Univ. of Electro-Communications), Jin Nakazato, Manabu Tsukada (UTokyo)  SRW2023-52 |
Spatial multiplexing performance of the multi-user MIMO is deteriorated in the mobility environment, especially using th... [more] | SRW2023-52 p.39 |
| AP, RCS (Joint) |
2023-11-17 09:30 |
Kumamoto | Kumamoto Prefectural Workers' Welfare Hall (Primary: On-site, Secondary: Online) |
A Study on Null Depth Control using Multiple Null Constrained transmission directivity control for Microwave Wireless Power Transmission Katsutoshi Kawai, Tomoyuki Nakasha, Yuuya Tanaka (Kyocera) AP2023-147 |
In adaptive array transmission, beamforming performance can be improved by controlling the null depth. In microwave wire... [more] | AP2023-147 pp.86-91 |
| CQ, MIKA (Joint) (2nd) |
2023-08-31 10:50 |
Fukushima | Tenjin-Misaki Sports Park | [Poster Presentation]
Coexistence of Wireless Power Transfer and Communication by Null-Space Expansion Shuma Okita, Yuki Sasaki, Kazuki Maruta (Tokyo Univ. of Science), Takahiro Matuda (Tokyo Metropolitan Univ.), Takefumi Hiraguri (NIT), Tomotaka Kimura (Doshisha Univ.) |
Wireless power transfer (WPT) is a promising technology to effectively supply energy to a large number of IoT devices. ... [more] |
|
| SANE | 2023-05-23 10:40 |
Kanagawa | Information Technology R & D Center, MITSUBISHI Electric Corp. (Primary: On-site, Secondary: Online) |
A Study of Wide-null Forming in Near Field Region by a Phased Array Antenna Takashi Uno, Narihiro Nakamoto, Toru Fukasawa, Toru Takahashi, Yoshio Inasawa (Mitsubishi Electric Corp.) SANE2023-4 |
In combining multiple radars and receiving reflected waves from targets of other radars, direct waves from other radars ... [more] | SANE2023-4 pp.18-23 |
| SR | 2023-05-11 15:25 |
Hokkaido | Center of lifelong learning Kiran (Higashi Muroran) (Primary: On-site, Secondary: Online) |
[Short Paper]
Secure SWIPT with path isolation of information signals using nulling Kazuki Fujii, Katsuya Suto (UEC) SR2023-12 |
SWIPT (Simultaneous Wireless Information and Power Transfer) provides data communication to sensors while supplying powe... [more] | SR2023-12 pp.61-63 |
| AP | 2023-03-17 09:30 |
Toyama | Toyama Prefectural Civic Hall (Primary: On-site, Secondary: Online) |
A Study on the Transmission Directivity Control using wide-angle nulling for the Wireless Power Transmission Katsutoshi Kawai, Tomoyuki Nakasha, Yuuya Tanaka (Kyocera), Mitoshi Fujimoto (Univ. of Fukui) AP2022-241 |
When the beam wireless power transmission is used in an indoor manned environment, the power transmission efficiency and... [more] | AP2022-241 pp.43-48 |
| RCS, AP, UWT (Joint) |
2022-11-17 15:25 |
Fukuoka | Kyushu University, and Online (Primary: On-site, Secondary: Online) |
Subarray Optimization for Inter-HAPS Interference Mitigation in Massive MIMO Systems Koji Tashiro, Kenji Hoshino, Atsushi Nagate (SoftBank) RCS2022-183 |
High-altitude platform stations (HAPSs) have attracted much attention as a leading technology for coverage extension in ... [more] | RCS2022-183 pp.161-166 |
| AP | 2022-10-20 16:25 |
Gifu | GIFU CITY CULTURE CENTER (Primary: On-site, Secondary: Online) |
A Study on the Transmission Directivity Control for the Wireless Power Transmission
-- Linearly Constrained Retrodirective Method -- Katsutoshi Kawai, Tomoyuki Nakasha, Yuuya Tanaka (Kyocera Corp.), Mitoshi Fujimoto (Univ. of Fukui) AP2022-146 |
When the beam wireless power transmission, which can supply power to devices at a distance using microwaves, is used in ... [more] | AP2022-146 pp.239-244 |
| RCS | 2022-06-15 11:25 |
Okinawa | University of the Ryukyus, Senbaru Campus and online (Primary: On-site, Secondary: Online) |
Inter-HAPS Interference Reduction Technique Using Subarrayed Cylindrical Antenna with Nullforming Koji Tashiro, Kenji Hoshino, Atsushi Nagate (SoftBank) RCS2022-28 |
High-altitude platform stations (HAPS) have attracted much attention as a leading technology for coverage extension in t... [more] | RCS2022-28 pp.25-30 |
| CQ, MIKA (Joint) |
2021-09-09 14:40 |
Online | Online | [Invited Talk]
Advancement of Multiuser Massive MIMO Null-Space Expansion Kazuki Maruta (Tokyo Tech) CQ2021-46 |
Massive multiple-input multiple-output (MIMO) technology with base stations having more than a hundred antennas has been... [more] | CQ2021-46 p.46 |
| RCS, SAT (Joint) |
2021-08-26 11:50 |
Online | Online | Two-Stage Precoding with Null-Steering for Spectrum Sharing between HAPS and Terrestrial Systems Koji Tashiro, Kenji Hoshino, Atsushi Nagate (SoftBank) RCS2021-101 |
Coverage extension to the sky, seas, and mountains is one of the important concepts of the sixth generation (6G) mobile ... [more] | RCS2021-101 pp.13-18 |
| RCS | 2021-06-23 13:20 |
Online | Online | Investigation on Complexity Reduction in Peak Cancellation Signal-Based PAPR Reduction Method Using Null Space in MIMO Channel Kenta Hosoi (Tokyo Univ. of Science), Nobuhide Nonaka (NTT DOCOMO), Kenichi Higuchi (Tokyo Univ. of Science) RCS2021-38 |
In this paper, we propose an algorithm to further reduce the computational complexity of the peak-to-average power ratio... [more] | RCS2021-38 pp.56-61 |
| RCS | 2021-06-25 15:00 |
Online | Online | Null-Steering Technique in HAPS Systems for Spectrum Sharing with Terrestrial Mobile Networks Koji Tashiro, Kenji Hoshino, Atsushi Nagate (SoftBank) RCS2021-75 |
Coverage extension to the sky, seas, and mountains is one of the important concepts of the sixth generation (6G) mobile ... [more] | RCS2021-75 pp.267-272 |
| EA, SIP, SP | 2019-03-14 13:30 |
Nagasaki | i+Land nagasaki (Nagasaki-shi) | Beamforming for Brain-Activity Reconstruction under Time-Correlated Interference Takehiro Kono (Keio Univ.), Masahiro Yukawa (Keio Univ./Riken), Tomasz Piotrowski (Nicolaus Copernicus Univ./Interdisciplinary Center for Modern Te) EA2018-116 SIP2018-122 SP2018-78 |
We consider the problem of reconstruction of brain activity from non-invasive electroencephalography (EEG) signals using... [more] | EA2018-116 SIP2018-122 SP2018-78 pp.99-104 |
| AP | 2017-04-21 15:00 |
Osaka | Osaka university | A Study of Gain reduction with Restricted Amplitude Control Range for Active Phased Array Antennas Takayuki Nakanishi, Kazunari Kihira, Toru Takahashi, Yoshio Inasawa, Hiroaki Miyashita (Mitsubishi Electric Corp.) AP2017-19 |
An active phased array antenna is capable of controlling not only the phase of each element but also the amplitude, and ... [more] | AP2017-19 pp.95-100 |
| RCS | 2015-06-24 16:10 |
Hokkaido | Hokkaido Univ. | Effective Use of Spatial Dimension for Inter-user Interference suppression on Multiuser Massive MIMO under Time Varying Channel Environment Atsushi Ohta, Tatsuhiko Iwakuni, Kazuki Maruta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2015-54 |
The authors have proposed the Inter-user Interference (IUI) suppression scheme on Multiuser Massive MIMO which utilizes ... [more] | RCS2015-54 pp.49-54 |
| RCS | 2015-04-17 13:00 |
Oita | Yufuin, Yufugoukan | Inter-user Interference Suppression with Null-Space Extension in Multiuser Massive MIMO for Time Varying Channel Tatsuhiko Iwakuni, Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2015-17 |
This paper proposes a new IUI suppression technique named “Null-Space Extension” with Massive MIMO in time varying chann... [more] | RCS2015-17 pp.89-94 |
| AP, RCS (Joint) |
2011-11-17 09:10 |
Aichi | Nagoya Congress Center | On Blind Post-FFT Beamforming for Inter-Block Interference Suppression in OFDM Systems Daisuke Haseno (Ibraki Univ.), Kazuhiko Nakamura (Yamanashi Univ.), Teruyuki Miyajima (Ibaraki Univ.) AP2011-102 |
In orthogonal frequency division multiplex (OFDM) systems that are suitable for high-speed wireless transmissions, perfo... [more] | AP2011-102 pp.73-78 |
| SANE | 2011-06-23 10:10 |
Ibaraki | Tsukuba Space Center (JAXA) | Null Beam Forming by Amplitude and Phase Control for Multiple-Beam Phased Array Antennas Takayuki Nakanishi, Kazunari Kihira, Toru Takahashi, Toshihiko Aoki, Ichiro Inamori, Yoshihiko Konishi (Mitsubishi Electric Corp.), Masanobu Yajima, Toshihiro Sezai, Johta Awano (JAXA) SANE2011-19 |
Multiple access technologies have been required for intersatellite communications between low earth orbit (LEO) satellit... [more] | SANE2011-19 pp.11-16 |
| SANE | 2010-06-25 13:40 |
Ibaraki | Tsukuba Space Center (JAXA) | Null Beam Forming for Multiple-Beam Phased Array Antennas on GEO Satellites Toru Takahashi, Narihiro Nakamoto, Tamotsu Nishino, Toshihiko Aoki, Yoshihiko Konishi, Isamu Chiba (Mitsubishi Electric), Masanobu Yajima, Johta Awano, Ichirou Inamori (JAXA) SANE2010-42 |
Multiple access technologies have been required for intersatellite communications between low earth orbit (LEO) satellit... [more] | SANE2010-42 pp.151-156 |
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