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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| AP | 2025-03-18 14:20 |
Akita | ATORION AKITA (Akita, Online) (Primary: On-site, Secondary: Online) |
A Study on HAPS feeder link LoS-MIMO non-regenerative wireless relay system Yoshichika Ohta, Kazuki Matsuura, Yuki Takagi (SoftBank) |
[more] | |
| AP | 2025-03-19 10:20 |
Akita | ATORION AKITA (Akita, Online) (Primary: On-site, Secondary: Online) |
Experimental Study on Beam Control for HAPS Feeder Link Kazuki Matsuura, Yoshichika Ohta (SoftBank) |
[more] | |
| WPT | 2024-12-12 11:30 |
Ishikawa | Ohgigaoka Campus, Kanazawa Institute of Technology (Ishikawa, Online) (Primary: On-site, Secondary: Online) |
Integrated System of Millimeter Wave Communication and Wireless Power Transfer Using Image-Based Position Estimation Yuta Nakamoto, Naoki Hasegawa, Kosuke Takeda, Masaya Ogino, Kiyotaka Imai, Takashi Hirakawa, Yuki Takagi, Yoshichika Ohta (SoftBank)  WPT2024-28 |
In the Beyond 5G/6G era, various IoT sensors are expected to be connected to the network to realize a digital twin. How... [more] |
WPT2024-28 pp.22-26 |
| MW | 2024-11-15 11:25 |
Okinawa | JA Kume-jima Yuntaku house (Okinawa, Online) (Primary: On-site, Secondary: Online) |
Outphasing Power Amplifier with Switching Reactance Compensation Circuit Yuki Takagi, Takashi Hirakawa, Yoshichika Ohta, Naoki Hasegawa (SB) MW2024-137 |
In this paper, we propose a method to switch the reactance compensation circuit in the Chirex combiner, which is a part ... [more] | MW2024-137 pp.69-74 |
| AP, SANE, SAT (Joint) |
2024-07-24 14:40 |
Hokkaido | Frontier Research in Applied Sciences Building, Hokkaido University (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Stratospheric demonstration of HAPS wireless communication system Yoshichika Ohta, Mitsukuni Konishi, Kazuki Matsuura, Yuki Takagi, Takuya Hasegawa, Atsushi Nagate (Softbank) AP2024-25 |
HAPS (High-Altitude Platform Stations), which provide mobile communication services by installing base station equipment... [more] | AP2024-25 pp.19-24 |
| MW, EMT, OPE, MWPTHz, EST, IEE-EMT [detail] | 2024-07-12 11:05 |
Hokkaido | otaru-shimin-kaikan (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
Interference Canceler Circuit Configuration for Rx Caused by Tx Power Amplifier using Vector Modulator Yuki Takagi, Yoshichika Ohta (SB) EMT2024-38 MW2024-62 OPE2024-41 EST2024-39 MWPTHz2024-45 |
In this paper, we propose a circuit configuration that uses a vector modulator to cancel interference signals from the T... [more] | EMT2024-38 MW2024-62 OPE2024-41 EST2024-39 MWPTHz2024-45 pp.158-162 |
| AP | 2024-03-14 10:00 |
Fukui | UNIVERSITY OF FUKUI (Fukui, Online) (Primary: On-site, Secondary: Online) |
A Study on Antenna Configuration for LoS-MIMO in HAPS Feeder Link Kazuki Matsuura, Yoshichika Ohta (SoftBank) AP2023-201 |
High-Altitude Platform Station (HAPS) is a new mobile communications platform that enables ultrawide coverage and disast... [more] | AP2023-201 pp.1-6 |
| AP | 2024-03-14 10:25 |
Fukui | UNIVERSITY OF FUKUI (Fukui, Online) (Primary: On-site, Secondary: Online) |
Direction of arrival estimation using neural networks and Uniform Cross Array for LoS-MIMO transmission Motoshi Tawada, Yoshichika Ohta (SoftBank) AP2023-202 |
The feeder link between the fixed ground station and the HAPS requires high capacity to accommodate the traffic of termi... [more] | AP2023-202 pp.7-10 |
| AP, WPT (Joint) |
2024-01-17 14:25 |
Niigata | Tokimate, Niigata University (Niigata, Online) (Primary: On-site, Secondary: Online) |
2.45 GHz High-Efficiency Power Amplifier for Integration and Cooperation of Telecommunication and Wireless Power Transfer Yuki Takagi, Yuta Nakamoto, Takashi Hirakawa, Yoshichika Ohta, Naoki Hasegawa (SB) WPT2023-30 |
In this paper, we present a transmitter configuration of wireless devices that is optimized for both information transmi... [more] | WPT2023-30 pp.1-5 |
| MW | 2023-11-16 11:15 |
Okinawa | Nago City Industrial Support Center (Okinawa) (Okinawa, Online) (Primary: On-site, Secondary: Online) |
Dual-Band Asymmetric Doherty Amplifier with T-shaped Stubs Yuki Takagi, Yoshichika Ohta (SB) MW2023-127 |
In this paper, we propose a design method for a dual-band asymmetric Doherty amplifier at 1.8 GHz(Band3)/2.1 GHz (Band1)... [more] | MW2023-127 pp.7-12 |
| WPT | 2023-06-30 13:40 |
Tokyo | (Tokyo, Online) (Primary: On-site, Secondary: Online) |
[Invited Talk]
Study on Integration and Cooperation of Telecommunication and Wireless Power Transfer Yuta Nakamoto, Naoki Hasegawa, Takashi Hirakawa, Yoshichika Ohta (SoftBank Corp.) WPT2023-10 |
The IoT business has been developing rapidly in recent years, and IoT devices are expected to become more widespread in ... [more] | WPT2023-10 p.2 |
| RCS, IN, NV (Joint) |
2023-05-25 10:50 |
Kanagawa | Keio University (Hiyoshi Campus), and online (Kanagawa, Online) (Primary: On-site, Secondary: Online) |
Performance Evaluation of Digital Self-Interference Cancellers for In-Band Full-Duplex Systems with High-Power Amplifiers Motoshi Tawada, Yuki Takagi, Yoshichika Ohta (SoftBank) RCS2023-16 |
In-band full-duplex communication (IBFD), which performs transmission and reception in the same frequency band at the sa... [more] | RCS2023-16 pp.13-17 |
| AP | 2023-02-15 13:50 |
Miyagi | Tohoku University, Aobayama Campus (Miyagi, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Design and Analysis of LoS-MIMO System with Uniform Cross Array Composed of Dual-polarized Antennas Motoshi Tawada, Yoshichika Ohta, Atsushi Nagate (SoftBank) AP2022-204 |
Research and development of communication services using radios and antennas mounted on vehicles, unmanned aerial vehicl... [more] | AP2022-204 pp.40-45 |
| AP | 2023-02-16 15:20 |
Miyagi | Tohoku University, Aobayama Campus (Miyagi, Online) (Primary: On-site, Secondary: Online) |
[Tutorial Lecture]
Research and development of HAPS wireless relay system Yoshichika Ohta (Softbank) AP2022-219 |
HAPS (High-Altitude Platform Stations), which provide mobile communication services by installing base station equipment... [more] | AP2022-219 pp.121-126 |
| WPT (2nd) |
2022-12-05 - 2022-12-06 |
Kyoto | Uji Obaku Plaza Kihada Hall, Uji Campus, Kyoto University (Kyoto, Online) (Primary: On-site, Secondary: Online) |
Experiment of wireless power transmission using millimeter-wave rectenna with modulated signal input Yuta Nakamoto, Naoki Hasegawa, Takashi Hirakawa, Yoshichika Ohta (SoftBank Corp.), Naoki Sakai, Tsukasa Hirai, Kenji Itoh (KIT) |
This work focuses on the wireless power transfer (WPT) compatible base station for IoT sensors. A technique to add WPT ... [more] |
|
| RCS, AP, UWT (Joint) |
2022-11-16 14:55 |
Fukuoka | Kyushu University, and Online (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
LoS-MIMO Transmission Experiment Using Dual-polarized Antennas. Motoshi Tawada, Yoshichika Ohta, Atsushi Nagate (SoftBank) AP2022-163 |
Research and development of communication services using radios and antennas mounted on vehicles, UAVs, HAPS, and other ... [more] | AP2022-163 pp.91-96 |
| MW | 2022-11-15 13:50 |
Nagasaki | Fukue-Bunka-Kaikan (Nagasaki, Online) (Primary: On-site, Secondary: Online) |
Study on Power Consumption and Power Reduction of RF Power Amplifier in 5G Downlink System Yuki Takagi, Yoshichika Ohta (SB) MW2022-113 |
This paper proposes the estimation of power consumption of RF power amplifier in downlink (from base station to UE) comm... [more] | MW2022-113 pp.25-30 |
| EE, WPT (Joint) |
2022-10-06 13:55 |
Osaka | (Osaka, Online) (Primary: On-site, Secondary: Online) |
28 GHz band wireless power transfer experiments with a GaAs rectenna MMIC with an inductive high impedance patch antenna Tsukasa Hirai, Takumi Itoh, Yuya Hirose, Naoki Sakai, Keisuke Noguchi, Kenji Itoh (Kanazawa IT), Naoki Hasegawa, Takashi Hirakawa, Yuta Nakamoto, Yoshichika Ohta (SoftBank) WPT2022-22 |
As one of additional functions in the beyond-5th generation (B5G) mobile communication system, the wireless power transf... [more] | WPT2022-22 pp.7-10 |
| AP, MW (Joint) |
2022-09-15 13:50 |
Ehime | The Museum of Art, EHIME (Ehime, Online) (Primary: On-site, Secondary: Online) |
Prototype Development and Basic Experimental Evaluation of Feeder Link Transceiver in HAPS System Kazuki Matsuura, Yoshichika Ohta (SoftBank) AP2022-79 |
High-Altitude Platform Station (HAPS) is attracting much attention as a new mobile communications platform realizing ult... [more] | AP2022-79 pp.44-49 |
| AP | 2022-08-19 13:25 |
Tochigi | Tochigi Prefecture Industrial Center (Tochigi, Online) (Primary: On-site, Secondary: Online) |
A Study on Robust LoS-MIMO Transmission in HAPS Feeder Link Motoshi Tawada, Yoshichika Ohta, Atsushi Nagate (Softbank) AP2022-68 |
In line of sight multiple input multiple output (LoS-MIMO) transmission in a feeder link, which involves communication b... [more] | AP2022-68 pp.23-28 |
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