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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 194  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
SANE, SAT
(Joint)
2023-03-03
14:40
Okinawa
(Primary: On-site, Secondary: Online)
Development of 38GHz-band Wireless Communication System Using High Altitude Platform Station (HAPS) for 5G Network -- Basic evaluation of the lens antenna of 38GHz-band ground station antenna system for HAPS --
Takuya Okura, Hiroyuki Tsuji, Ryu Miura, Tomoshige Kan, Takashi Matsuda, Morio Toyoshima (NICT), Jun Suzuki (SKY Perfect JSAT), Yoshihisa Kishiyama (NTT DOCOMO)
 [more]
AP 2023-02-15
11:25
Miyagi Tohoku University, Aobayama Campus
(Primary: On-site, Secondary: Online)
[Invited Lecture] Research and Development of Antenna Device for HAPS Ground Station Composed of 2-Axis Mechanically Driven Gimbal and Lens Antenna
Go Otsuru, Hiroyuki Tsuji, Ryu Miura (NICT), Jun Suzuki (SKY Perfect JSAT), Yoshihisa Kishiyama (NTT DOCOMO)
(To be available after the conference date) [more]
RCS, AP, UWT
(Joint)
2022-11-17
13:05
Fukuoka Kyushu University, and Online
(Primary: On-site, Secondary: Online)
[Invited Lecture] Extreme coverage extension in 5G Evolution & 6G: Multi-layered non-terrestrial networks integrating terrestrial networks
Yuki Hokazono, Hinata Kohara, Yuto Muroki, Kenji Fukasawa, Yoshihisa Kishiyama, Satoshi Nagata (NTT DOCOMO, INC.) AP2022-167 RCS2022-178
Non-terrestrial networks (NTNs) are promising to actualize extreme coverage extension whereby mobile communications can ... [more] AP2022-167 RCS2022-178
p.115(AP), p.136(RCS)
RCS 2022-10-28
11:20
Ehime Ehime University, and online
(Primary: On-site, Secondary: Online)
Transmission experiment with delay generator for realization of HAPS network
Hinata Kohara, Yuki Hokazono, Yuto Muroki, Yoshihisa Kishiyama, Kenji Fukasawa (NTT DOCOMO), Jun Suzuki, Hiromu Kitanozono (SKY Perfect JSAT) RCS2022-146
We are focusing on the provision of communication areas from the sky by satellites and High-Altitude Platform Stations (... [more] RCS2022-146
pp.89-94
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
NS, SR, RCS, SeMI, RCC
(Joint)
2022-07-14
15:40
Ishikawa The Kanazawa Theatre + Online
(Primary: On-site, Secondary: Online)
Bit Error Rate Performance of OFDM Using Hierarchical Modulation in 3GPP TDL Channel Model
Daiki Mitamura, Mamoru Sawahashi (Tokyo City Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCS2022-90
 [more] RCS2022-90
pp.113-118
RCS 2022-06-15
13:10
Okinawa University of the Ryukyus, Senbaru Campus and online
(Primary: On-site, Secondary: Online)
Preamble Detection of PRACH with Short Sequence Considering Frequency Offset for NR Radio Interface
Takamichi Chiba, Mamoru Sawahashi (Tokyo City Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCS2022-30
 [more] RCS2022-30
pp.37-42
RCC, WBS, SAT, MICT 2022-05-26
13:00
Online Online Development of 38GHz-band Wireless Communication System Using High Altitude Platform Station (HAPS) for 5G Network -- Examination of the lens antenna of 38GHz-band ground station antenna system for HAPS --
Takuya Okura, Hiroyuki Tsuji, Ryu Miura, Tomoshige Kan, Takashi Matsuda, Morio Toyoshima (NICT), Jun Suzuki (SKY Perfect JSAT), Yoshihisa Kishiyama (NTT DOCOMO) WBS2022-6 RCC2022-6 SAT2022-6 MICT2022-6
 [more] WBS2022-6 RCC2022-6 SAT2022-6 MICT2022-6
pp.22-27
RCC, WBS, SAT, MICT 2022-05-26
15:00
Online Online Development of 38GHz-band Wireless Communication System Using High Altitude Platform Station (HAPS) for 5G Network -- Fundamental Experiment on Tracking System for HAPS Ground Station in Millimeter-Wave --
Go Otsuru, Hiroyuki Tsuji, Yuma Abe, Mariko Sekiguchi, Ryu Miura, Takuya Okura, Tomoshige Kan, Takashi Matsuda (NICT), Jun Suzuki (SKY Perfect JSAT), Yoshihisa Kishiyama (NTT DOCOMO) WBS2022-9 RCC2022-9 SAT2022-9 MICT2022-9
In this paper, we propose a tracking system for high-altitude platform station (HAPS) ground station in millimeter-wave ... [more] WBS2022-9 RCC2022-9 SAT2022-9 MICT2022-9
pp.40-45
RCS 2022-04-21
12:50
Osaka Osaka University, and online
(Primary: On-site, Secondary: Online)
[Invited Talk] DOCOMO's Recent Activities on 5G Evolution & 6G
Satoshi Suyama, Yoshihisa Kishiyama, Takahiro Asai (NTT DOCOMO) RCS2022-3
Towards further enhancement of 5G, so-called 5G evolution and Beyond 5G/6G that aims to be realized in almost 2030, a va... [more] RCS2022-3
p.11
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
RCS, NS
(Joint)
2021-12-16
13:50
Nara Nara-ken Bunka Kaikan and Online
(Primary: On-site, Secondary: Online)
Issues of Sub-Terahertz-Band Radio Access Technologies for 6G
Hayato Fukuzono (NTT), Satoshi Suyama (NTT DOCOMO), Doohwan Lee, Daisei Uchida (NTT), Tatsuki Okuyama (NTT DOCOMO), Masashi Iwabuchi, Jun Mashino (NTT), Yoshihisa Kishiyama (NTT DOCOMO) RCS2021-180
One of the requirements for the sixth generation mobile communication system (6G) is extreme high data rate and capacity... [more] RCS2021-180
pp.30-34
RCS, SAT
(Joint)
2021-08-26
15:15
Online Online [Invited Lecture] Development of HAPS Backhaul System using mmWave Frequency -- HAPS as a NTN System for 5G and Beyond --
Hiromu Kitanozoo, Jun Suzuki (SJC), Yoshihisa Kishiyama, Yuki Hokazono (NTT DOCOMO), Takayuki Sotoyama, Mikihiro Ouchi (Panasonic), Ryu Miura, Hiroyuki Tsuji (NICT) SAT2021-30 RCS2021-105
In order to support the mid-2020 and beyond, the development of high-speed, high-capacity wireless communication systems... [more] SAT2021-30 RCS2021-105
pp.14-19(SAT), pp.32-37(RCS)
RCS, SAT
(Joint)
2021-08-26
15:40
Online Online [Invited Lecture] Beyond 5G and 6G for extreme coverage extension: Non-Terrestrial Network trends and performance evaluation of HAPS
Yuki Hokazono, Yoshihisa Kishiyama, Takahiro Asai (NTT DOCOMO INC.) SAT2021-31 RCS2021-106
In Beyond 5G & 6G era, extreme coverage extension is being studied for use cases in all places including air, sea, and s... [more] SAT2021-31 RCS2021-106
p.20(SAT), p.38(RCS)
RCS, SAT
(Joint)
2021-08-26
16:40
Online Online BLER Performance of Circular 256QAM Schemes Considering Cubic Metric for DFT-Precoded OFDM
Yugo Sasaki, Mamoru Sawahashi (Tokyo City Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCS2021-108
This paper presents the average block error rate (BLER) performance of circular 256QAM schemes considering a peak-to-ave... [more] RCS2021-108
pp.45-50
RCS, SAT
(Joint)
2021-08-26
17:05
Online Online Round Trip Time for Control Channel Multiplexing Using In-Band Full Duplex with Synchronous Orthogonal Sequence Assignment
Mamoru Sawahashi, Fumiya Makishi (Tokyo City Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCS2021-109
 [more] RCS2021-109
pp.51-56
RCS, SAT
(Joint)
2021-08-27
18:00
Online Online Measurement on 39 GHz band radio propagation characteristics for coverage extension from the sky
Yuki Hokazono, Yoshihisa Kishiyama, Takahiro Asai (NTT DOCOMO INC.), Tetsumi Takamori, Jun Suzuki, Hiromu Kitanozono (SKY Perfect JSAT Corporation) SAT2021-41
While the 5G is expected to be an important technology for regional development and solving regional issues, a key issue... [more] SAT2021-41
pp.73-78
RCS, SR, NS, SeMI, RCC
(Joint)
2021-07-16
14:30
Online Online Considerations on Accuracy Improvement in Close DOA Estimation with Deep Learning
Yuya Kase, Toshihiko Nishimura, Takeo Ohgane, Yasutaka Ogawa, Takanori Sato (Hokkaido Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCC2021-39 NS2021-55 RCS2021-97 SR2021-39 SeMI2021-28
In addition to subspace methods such as MUSIC and ESPRIT, recently,
compressed sensing and deep learning have been appl... [more]
RCC2021-39 NS2021-55 RCS2021-97 SR2021-39 SeMI2021-28
pp.77-82(RCC), pp.118-123(NS), pp.98-103(RCS), pp.100-105(SR), pp.76-81(SeMI)
RCS, SR, SRW
(Joint)
2021-03-03
11:15
Online Online BLER of OFDM Using FTN Signaling with Turbo SIC Multiplying Symbol Estimate by Weighting Factor
Toshiharu Obara, Tsubasa Shobudani, Mamoru Sawahashi (Tokyo City Univ.), Yoshihisa Kishiyama (NTT DOCOMO) RCS2020-206
This paper proposes multiplying weighting factor of less than one to the interfering OFDM symbol estimate for turbo soft... [more] RCS2020-206
pp.19-24
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