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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 76  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS 2023-10-20
11:50
Kagawa Kagawa University (Saiwai-cho Campus), and online
(Primary: On-site, Secondary: Online)
Development of Extreme Coverage Communication System Extended by Non-Terrestrial Network (NTN) -- Evaluation of 2-GHz Band Interference between HAPS and Ground Systems in Several Frequency Modes --
Yuto Muroki, Yuki Hokazono, Hinata Kohara, Atsunori Shimamura, Kenji Fukasawa (NTT DOCOMO), Hisayoshi Kano, Munehiro Matsui, Junichi Abe, Fumihiro Yamashita (NTT) RCS2023-144
We are focusing on the provision of communication areas from the sky by satellites and High-Altitude Platform Stations (... [more] RCS2023-144
pp.79-84
SAT, KOSST 2023-10-11
11:15
Overseas Central Hotel Marianne(Korea, Busan)
(Primary: On-site, Secondary: Online)
An Advanced Proposal for the On-orbit Practical Experiment of LEO Satellite MIMO for 920MHz band IoT Sensing Platform
Kiyohiko Itokawa, Daisuke Goto, Yasuyoshi Kojima, Kouhei Suzaki, Kazumitsu Sakamoto, Yousuke Fujino, Fumihiro Yamashita (NTT), Chihaya Kato, Mitsuhiro Nakadai, Masanobu Yajima (JAXA) SAT2023-55
 [more] SAT2023-55
pp.39-44
RCS, SAT
(Joint)
2023-08-31
09:00
Nagano Naganoken Nokyo Building, and online
(Primary: On-site, Secondary: Online)
CRDSA/IRSA Based Transmission Control Considering Available Channels Difference and Fairness among Terminals in Satellite IoT Systems
Kansuke Kumazawa, Hiraku Okada (Nagoya Univ.), Munehiro Matsui, Koyo Tategami, Daisuke Goto, Kiyohiko Itokawa, Fumihiro Yamashita (NTT), Masaaki Katayama (Nagoya Univ.) SAT2023-33
(To be available after the conference date) [more] SAT2023-33
pp.1-6
RCS, SAT
(Joint)
2023-08-31
09:25
Nagano Naganoken Nokyo Building, and online
(Primary: On-site, Secondary: Online)
Capacity Evaluation for IoT Terminals in LEO Satellite IoT Platform Using Receiver Beamforming with Doppler Rate Compensation
Kazumitsu Sakamoto, Masaki Takahashi, Kouhei Suzaki, Yosuke Fujino, Kenji Suzuki, Yasuyoshi Kojima, Kiyohiko Itokawa, Fumihiro Yamashita (NTT) SAT2023-34
 [more] SAT2023-34
pp.7-12
CCS, IN
(Joint)
2023-08-03
15:25
Hokkaido Banya-no-yu [Invited Talk] Road to R&D towards non-terrestrial network evolving remote island/disaster-relief/maritime satellite communications
Fumihiro Yamashita (NTT) IN2023-22
 [more] IN2023-22
pp.29-34
AP, SANE, SAT
(Joint)
2023-07-13
11:40
Hokkaido The Citizen Activity Center
(Primary: On-site, Secondary: Online)
Development of Extreme Coverage Communication System Extended by Non-Terrestrial Network (NTN) -- Evaluation of 2GHz-Band Interference Avoidance and Rain Attenuation Compensation Technology Actualizing HAPS Communication System --
Yuto Muroki, Yuki Hokazono, Hinata Kohara, Kenji Fukasawa (NTT DOCOMO), Hisayoshi Kano, Munehiro Matsui, Junichi Abe, Fumihiro Yamashita (NTT) SAT2023-19
We are focusing on the provision of communication areas from the sky by satellites and High-Altitude Platform Stations (... [more] SAT2023-19
pp.53-58
AP, SANE, SAT
(Joint)
2023-07-13
12:00
Hokkaido The Citizen Activity Center
(Primary: On-site, Secondary: Online)
Development of extreme coverage communication system extended by Non-Terrestrial Network (NTN) -- Evaluation of routing method in transparent relay --
Hisayoshi Kano, Munehiro Matsui, Jun-ichi Abe, Fumihiro Yamashita (NTT), Yuki Hokazono, Hinata Kohara, Kenji Fukasawa (NTT DOCOMO) SAT2023-20
NTT has been proposing an IOWN space integrated computing network concept. We focus on coverage extension using non-terr... [more] SAT2023-20
pp.59-64
AP, SANE, SAT
(Joint)
2023-07-14
13:40
Hokkaido The Citizen Activity Center
(Primary: On-site, Secondary: Online)
Subarray Configuration Decision Method Based on Transmission Weights for Variable Subarray Beamforming in LEO-MIMO
Koyo Tategami, Daisuke Goto, Kiyohiko Itokawa, Fumihiro Yamashita (NTT) AP2023-59 SANE2023-31 SAT2023-30
 [more] AP2023-59 SANE2023-31 SAT2023-30
pp.156-161(AP), pp.54-59(SANE), pp.112-117(SAT)
MICT, WBS, RCC, SAT
(Joint) [detail]
2023-05-26
09:25
Tokyo TOKYO BIG SIGHT
(Primary: On-site, Secondary: Online)
A study on the rain attenuation duration characteristics using the different Ku-band satellite signals measured at multiple locations
Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), Koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT Corporation) SAT2023-5 MICT2023-5
The signal levels of Ku-band BS broadcast radio waves and JCSAT-5A beacon radio waves have been simultaneously measured ... [more] SAT2023-5 MICT2023-5
pp.20-25
MICT, WBS, RCC, SAT
(Joint) [detail]
2023-05-26
09:50
Tokyo TOKYO BIG SIGHT
(Primary: On-site, Secondary: Online)
LEO-MIMO Antenna Configuration of Satellite/Gateway for High Channel Capacity
Daisuke Goto, Koyo Tategami, Kiyohiko Itokawa, Fumihiro Yamashita (NTT) SAT2023-6 MICT2023-6
In this paper, we propose low earth orbit satellite (LEO) communications using Muti-input / Multi-output (MIMO), called ... [more] SAT2023-6 MICT2023-6
pp.26-31
CS, CQ
(Joint)
2023-05-19
14:55
Kagawa Rexxam Hall (Kagawa Kenmin Hall)
(Primary: On-site, Secondary: Online)
[Special Invited Talk] Recent research and development of wireless techniques for realizing 6G/IOWN concept
Takeshi Onizawa, Naoki Kita, Toshifumi Miyagi, Fumihiro Yamashita (NTT) CS2023-14
In this report, we describe recent research and development of wireless techniques for realizing 6G/IOWN concepts. We co... [more] CS2023-14
pp.34-40
SANE, SAT
(Joint)
2023-03-02
15:50
Okinawa
(Primary: On-site, Secondary: Online)
Study on Receiver Beamforming with Doppler Rate Compensation for IoT Platform via LEO Satellite
Kazumitsu Sakamoto, Kouhei Suzaki, Yohei Katayama, Yosuke Fujino, Kenji Suzuki, Yasuyoshi Kojima, Kiyohiko Itokawa, Fumihiro Yamashita (NTT) SAT2022-64
 [more] SAT2022-64
pp.51-56
SAT, KOSST 2022-10-06
13:15
Fukuoka
(Primary: On-site, Secondary: Online)
[Special Talk] R&D on wireless technologies in NTT Lab. for space integrated computing network
Fumihiro Yamashita, Junichi Abe, Kiyohiko Itokawa (NTT) SAT2022-44
 [more] SAT2022-44
pp.1-5
SAT, KOSST 2022-10-06
16:55
Fukuoka
(Primary: On-site, Secondary: Online)
A study on Site Diversity Effect between Different Satellites using Rain Attenuation Characteristics of Ku-band Satellite Communication Links
Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), Koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT) SAT2022-48
The signal levels of Ku-band BS broadcast radio waves and JCSAT-5A beacon radio waves have been simultaneously measured ... [more] SAT2022-48
pp.20-24
SAT, KOSST 2022-10-07
15:05
Fukuoka
(Primary: On-site, Secondary: Online)
Development of extreme coverage communication system extended by non-terrestrial network -- End-to-end route management based on QoS of user equipment --
Munehiro Matsui, Hisayoshi Kano, Junichi Abe (NTT), Yuki Hokazono, Atsushi Minokuchi, Yoshihisa Kishiyama (NTT DOCOMO), Fumihiro Yamashita (NTT) SAT2022-54
This report presents a routing management scheme, which manages the end-to-end route on the basis of the QoS of UE, to m... [more] SAT2022-54
pp.50-54
SAT, RCS
(Joint)
2022-08-25
16:40
Hokkaido
(Primary: On-site, Secondary: Online)
[Encouragement Talk] Development of extreme coverage communication system extended by Non-Terrestrial Network(NTN) -- UE availability evaluation during rainfall --
Hisayoshi Kano, Munehiro Matsui, Jun-ichi Abe (NTT), Yuki Hokazono, Hinata Kohara, Yoshihisa Kishiyama (NTTdocomo), Fumihiro Yamashita (NTT) SAT2022-37
NTT has been proposing an IOWN space integrated computing network concept. We focus on coverage extension using non-terr... [more] SAT2022-37
pp.48-53
SAT, SANE
(Joint)
2022-02-24
10:55
Online Online Development of extreme coverage communication system extended by Non-Terrestrial Network(NTN) -- A proposal on a routing algorithm that determines the optimal data transfer route by calculating the congestion degree and delay time --
Hisayoshi kano, Munehiro Matsui, Jun-ichi Abe (NTT), Yuki Hokazono, Hinata Kohara, Yoshihisa Kishiyama (NTTドコモ), Fumihiro Yamashita (NTT) SAT2021-56
NTT has been proposing an IOWN space integrated computing network concept. Extreme coverage communication systems consis... [more] SAT2021-56
pp.19-24
SAT, SANE
(Joint)
2022-02-24
15:50
Online Online Evaluation of antenna pointing control performance onboard fixed-wing UAV in HAPS wireless relay system
Koki Hamajima, Kei Yasukawa, Masazumi Ueba (Muroran IT), Hisayoshi Kanou, Munehiro Matusi, Junicho Abe, Kiyohiko Itokawa, Fumihiro Yamashita (NTT) SAT2021-58
Among the several uses of unmanned aerial vehicles (UAV), wireless relay systems for high altitudes using fixed-wing UAV... [more] SAT2021-58
pp.31-38
SAT, SANE
(Joint)
2022-02-24
16:40
Online Online Spectrum division technique of burst signal for satellite communications
Fumihiro Yamashita, Junichi Abe (NTT) SAT2021-60
 [more] SAT2021-60
pp.45-50
SAT 2021-10-08
08:30
Online Online R&D for IOWN space integrated computing network
Fumihiro Yamashita, Satoshi Ozeki, Shigehiro Hori (NTT) SAT2021-47
 [more] SAT2021-47
pp.23-27
 Results 1 - 20 of 76  /  [Next]  
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