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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 66  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
AP 2024-03-14
10:00
Fukui UNIVERSITY OF FUKUI
(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
(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
(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)
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
(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
NS, SR, RCS, SeMI, RCC
(Joint)
2022-07-14
11:45
Ishikawa The Kanazawa Theatre + Online
(Primary: On-site, Secondary: Online)
An Experimental Study on Automatic Gain Control in HAPS Repeater System
Takuya Hasegawa, Mitsukuni Konishi, Yoshichika Ohta, Atsushi Nagate (SoftBank) SR2022-29
High-Altitude Platform Station (HAPS) is a new mobile communication platform which enables to directly provide mobile co... [more] SR2022-29
pp.41-47
AP 2022-02-17
10:25
Online Online [Invited Lecture] A Study on HAPS Feeder Link System
Yoshichika Ohta, Kazuki Matsuura, Bing Han (Softbank) AP2021-160
HAPS (High-Altitude Platform Stations), which provide mobile communication services by installing base station equipment... [more] AP2021-160
pp.11-15
AP, RCS
(Joint)
2021-11-10
13:30
Nagasaki NBC-Bekkan (Nagasaki)
(Primary: On-site, Secondary: Online)
[Invited Lecture] A Study on Interference Canceller for HAPS Feeder Links with Multi-Gateways under Multiple-Path Environment
Takafumi Fujii, Yoshichika ohta (Softbank.corp) AP2021-101 RCS2021-148
HAPS (High Altitude Platform Station), which is a stratosphere platform around 20Km altitude, cellular communication ser... [more] AP2021-101 RCS2021-148
pp.3-9(AP), pp.21-27(RCS)
WPT 2021-03-05
11:35
Online Online Small-Size Rectenna Drone and Magnetron Transmitter
Naoki Hasegawa (SB), Teruo Fujiwara (Sho-Engineering), Yuta Nakamoto, Yoshichika Ohta (SB) WPT2020-46
This work discusses the microwave-power transfer (MPT) to a small done for the first step of research program on
wirele... [more]
WPT2020-46
pp.62-66
AP 2021-02-19
14:25
Online Online [Invited Lecture] A study on multi-beam conformal array antenna for UAV platforms (1)
Yoshichika Ohta (Softbank) AP2020-128
HAPS (High-Altitude Platform Stations), which provide mobile communication services by installing base station equipment... [more] AP2020-128
pp.68-72
MW, AP
(Joint)
2020-09-25
11:40
Online Online A Study on Antenna Configuration and Beam Control for Feeder Link in HAPS System
Kazuki Matsuura, Yoshichika Ohta (SoftBank) AP2020-65
High-Altitude Platform Station (HAPS), which provides communications services from the altitude of 20km by utilizing bal... [more] AP2020-65
pp.150-155
 Results 1 - 20 of 66  /  [Next]  
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