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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 22  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
SAT, MICT, WBS, RCC
(Joint) [detail]
2024-05-16
16:10
Miyazaki KITEN Convention hall (Miyazaki)
(Primary: On-site, Secondary: Online)
A Study on Frequency Scaling of Rain Attenuation by Simultaneous Measurement of Ka-band and Ku-band Satellite Beacon Signals
Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT)
 [more]
SAT, SANE
(Joint)
2024-02-08
14:40
Kagoshima AmaHome PLAZA (Amami City Shimin Koryu Center)
(Primary: On-site, Secondary: Online)
MEC content exchange control to reduce traffic on feeder link in non-terrestrial networks.
Munehiro Matsui, Kano Hisayoshi, Junichi Abe (NTT), Yuki Hokazono, Atsushi Minokuchi, Kenji Fukasawa (NTT docomo), Fumihiro Yamashita (NTT) SAT2023-64
This paper presents a study of reducing traffic flowing on a feeder link in NTN using multi-access edge computing (MEC).... [more] SAT2023-64
pp.27-32
SAT, SANE
(Joint)
2024-02-09
10:45
Kagoshima AmaHome PLAZA (Amami City Shimin Koryu Center)
(Primary: On-site, Secondary: Online)
A study on the rain attenuation statistics using the different Ku-band satellite signals measured at multiple locations
Yasuyuki Maekawa (Osaka Electro-Commun. Univ.), Koichi Harada, Junichi Abe, Fumihiro Yamashita (NTT) SAT2023-71
The signal levels of Ku-band BS broadcast radio wave and JCSAT-5A beacon radio wave have been simultaneously measured at... [more] SAT2023-71
pp.63-68
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
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
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
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, 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
RCS 2019-10-25
10:20
Kanagawa Yokosuka Research Park 28-GHz Band 5G Downlink Throughput Enhancement Using Reflectarray with Variable Phase Shifter
Yuta Takahashi (NTT Docomo Inc.), Yuta Takahashi (Iwate Univ.), Junichi Abe, Kazushi Muraoka, Satoshi Suyama, Yuji Aburakawa (NTT Docomo Inc.) RCS2019-194
SHF band (3 to 30 GHz) radio waves, used for fifth-generation (5G) mobile communication systems, has an issue to establi... [more] RCS2019-194
pp.89-94
SAT 2017-10-27
12:50
Okinawa Okinawa Cellular Telephone Company Frequency segment selection algorithm in autonomous bandwidth allocation FDMA for high frequency efficient satellite systems
Daisuke Goto, Junichi Abe, Fumihiro Yamashita (NTT) SAT2017-52
Frequency segment selection algorithm in autonomous bandwidth allocation FDMA for high frequency efficient satellite sys... [more] SAT2017-52
pp.95-100
SAT 2017-10-27
14:15
Okinawa Okinawa Cellular Telephone Company Direct Spectrum Division Transmission adapter for Cognitive multiple system overlay on satellite transponders
Fumihiro Yamashita, Junichi Abe, Daisuke Goto, Koichi Harada (NTT) SAT2017-54
 [more] SAT2017-54
pp.115-120
AP, SAT, SANE
(Joint)
2017-07-28
15:40
Aichi Nagoya Institute of Technology Development of Satellite Network Common Unit of High-Efficiency Satellite Communication System for Disaster Restoration
Hisayoshi Kano, Hiroki Shibayama, Izumi Urata, Keishin Yano, Junichi Abe, Akira Matsushita, Daisuke Goto, Katsuhiko Yamanaka, Yoshinori Suzuki, Yuichi Sagawa, Naoki Kita (NTT) SAT2017-18
NTT Access Network Service Systems Laboratories have been working on the research and development of the new satellite c... [more] SAT2017-18
pp.63-68
SRW 2016-12-19
12:55
Tokyo Tokyo City Univ., Setagaya Campus Impact of quantization level of A/D conversion on transmission performance of ultra-multi-level-modulation SSB-DFTs-OFDM
Hirokazu Fusayasu, Masahiro Umehira (Ibaraki Univ.), Junichi Abe (NTT) SRW2016-61
We have been proposing SSB-DFTs-OFDM (Single Side Band DFT spreading OFDM) scheme to achieve higher spectrum efficiency.... [more] SRW2016-61
pp.25-30
SAT 2016-10-14
13:10
Overseas Incheon Univ. Songdo R104, Auditorium & Performing Place Experimental verifications on the performance of Direct Spectrum Division Transmission adapter for satellite communications/broadcasting
Fumihiro Yamashita, Goto Daisuke, Junichi Abe, Naoki Kita (NTT) SAT2016-59
 [more] SAT2016-59
pp.91-96
SAT, RCS
(Joint)
2016-08-19
13:55
Miyagi Tohoku Gakuin University Performance comparison of SSB-DFTs-OFDM and DFTs-OFDM for ultra multi-level modulation in frequency-selective fading
Hirokazu Fusayasu, Tomoya Suzuki, Masahiro Umehira (Ibaraki Univ.), Junichi Abe (NTT) RCS2016-145
We have been proposing SSB-DFTs-OFDM (Single Side Band DFT spreading OFDM) scheme for ultra-multi-level modulation to ac... [more] RCS2016-145
pp.89-94
RCS, CCS, SR, SRW
(Joint)
2016-03-02
16:20
Tokyo Tokyo Institute of Technology BER Performance Degradation due to Hardware Implementation Errors in Ultra Multi-level SSB-DFTs-OFDM
Hirokazu Fusayasu, Shigeki Nihei, Masahiro Umehira (Ibaraki Univ.), Junichi Abe, Jun Mashino (NTT) RCS2015-347
We have proposed SSB-DFTs-OFDM using ultra multi-level BPSK modulation to further improve spectral efficiency. In the pr... [more] RCS2015-347
pp.85-90
NS, RCS
(Joint)
2015-12-18
11:00
Ehime Matsuyama Community Center A Consideration on Impact of DC Offset Error in Frequency Domain Equalization of DFTs-OFDM and SSB-DFTs-OFDM
Shigeki Nihei, Hirokazu Fusayasu, Masahiro Umehira (Ibaraki Univ.), Junichi Abe, Jun Mashino (NTT) RCS2015-264
DFTs-OFDM (DFT spread OFDM) and SSB-DFTs-OFDM (Single Side Band DFTs-OFDM) have lower PAPR than OFDM while maintaining t... [more] RCS2015-264
pp.121-126
NS, RCS
(Joint)
2015-12-18
11:25
Ehime Matsuyama Community Center Feasibility Study of Ultra Multi-level Modulation and Demodulation based on SSB-DFTs-OFDM
Hirokazu Fusayasu, Shigeki Nihei, Masahiro Umehira (Ibaraki Univ.), Junichi Abe, Jun Mashino (NTT) RCS2015-265
This report describes feasibility of ultra multi-level modulation based on SSB-DFTs-OFDM. This report reveals that SSB-D... [more] RCS2015-265
pp.127-132
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