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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 75  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
AP 2022-05-20
13:50
Hyogo Kobe Port Oasis
(Primary: On-site, Secondary: Online)
Radio propagation studies for 5G Evolution & 6G
Koshiro Kitao, Satoshi Suyama, Mitsuki Nakamura, Takahiro Tomie, Takahiro Asai (NTT DOCOMO) AP2022-28
 [more] AP2022-28
pp.95-100
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
RCS, SR, SRW
(Joint)
2022-03-03
09:30
Online Online Channel Estimation Scheme Robust against Pilot Contamination for Hybrid Beamforming Massive MIMO Systems
Yuki Ono, Yuyuan Chang, Kazuhiko Fukawa (Tokyo Tech), Satoshi Suyama, Takahiro Asai (NTT DOCOMO) RCS2021-270
In 5G massive MIMO systems, hybrid beamforming (HB), which is composed of the analog beamforming (AB) and the digital be... [more] RCS2021-270
pp.102-107
RCS, SR, SRW
(Joint)
2022-03-03
10:45
Online Online Radio Video Transmission Experiments Using Shinkansen Test Train Running at 360 km/h toward 5G Evolution
Nobuhide Nonaka, Satoshi Suyama, Tatsuki Okuyama, Hama yuto, Daisuke Kitayama, Takahiro Asai (NTT DOCOMO), Kenichiro Kamohara, Fumitoshi Abe, Reiji Ishima (JR East) RCS2021-273
 [more] RCS2021-273
pp.120-125
RCS, SIP, IT 2022-01-20
10:20
Online Online Influence of Design-SNR on Error Rate Performance Employing BP Decoder
Kohei Ueda (Kagawa Univ.), Satoshi Suyama, Takahiro Asai (NTT DOCOMO), Miki Nobuhiko (Kagawa Univ.) IT2021-30 SIP2021-38 RCS2021-198
Belief Propagation (BP) decoding, which is commonly used to decode Low Density Parity Check (LDPC) codes, is an effectiv... [more] IT2021-30 SIP2021-38 RCS2021-198
pp.13-17
RCS, NS
(Joint)
2021-12-16
13:25
Nara Nara-ken Bunka Kaikan and Online
(Primary: On-site, Secondary: Online)
Performance Evaluations of Transmitter and Receiver Hybrid Beamforming in Massive MIMO at 100 GHz-band
Nobuhide Nonaka, Satoshi Suyama, Tatsuki Okuyama, Takahiro Asai (NTT DOCOMO) RCS2021-179
 [more] RCS2021-179
pp.24-29
RCS, NS
(Joint)
2021-12-17
10:35
Nara Nara-ken Bunka Kaikan and Online
(Primary: On-site, Secondary: Online)
Evaluation of the Effectiveness of Metasurface, FSS, and Relay Station Technologies for Improving Indoor Areas in the High Frequency Band
Jun Tsuboi (DOCOMO), Takeshi Motegi, Osamu Kagaya (AGC), Daisuke Kitayama (NTT), Kensuke Miyachi, Takahiro Asai (DOCOMO) RCS2021-187
In order to further utilize the high frequency band represented by millimeter wave, it is one of the issues to construct... [more] RCS2021-187
pp.63-68
AP, RCS
(Joint)
2021-11-12
09:30
Nagasaki NBC-Bekkan (Nagasaki)
(Primary: On-site, Secondary: Online)
Experimental Trials Using Shinkansen Test Train Running at 360 km/h toward 5G Evolution
Nobuhide Nonaka, Satoshi Suyama, Tatsuki Okuyama, Yuto Hama, Daisuke Kitayama, Takahiro Asai (NTT DOCOMO), Shoji Itoh (Ericsson Japan), Anders Carlsson, Johan Furuskog, Magnus Wikstrom, Qiang Zhang (Ericsson), Kenichiro Kamohara, Fumitoshi Abe, Reiji Ishima (JR EAST) RCS2021-166
 [more] RCS2021-166
pp.118-123
RCS 2021-10-22
11:15
Online Online Performance Evaluation of Two Directions in Base Station Antennas by 28 GHz-Band Outdoor Experiments of Base Station Cooperation Technology in High-Mobility Environments
Tatsuki Okuyama, Satoshi Suyama, Nobuhide Nonaka, Takahiro Asai (NTT DOCOMO) RCS2021-134
 [more] RCS2021-134
pp.82-87
RCS 2021-10-22
15:00
Online Online [Poster Presentation] NTT DOCOMO's Activities for 5G Evolution & 6G
Satoshi Suyama, Tatsuki Okuyama, Nobuhide Nonakaka, Takahiro Asai (NTT DOCOMO) RCS2021-142
 [more] RCS2021-142
p.126
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)
2021-08-27
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 2021-06-24
13:50
Online Online A Study on How to Optimize the Transmission Power of pico-eNB in Multiband HetNets
Ayumi Yoneyama (Kogakuin Univ.), Satoshi Suyama, Takahiro Asai (NTT DOCOMO), Hiroyuki Otsuka (Kogakuin Univ.) RCS2021-58
Two types of fifth-generation (5G) mobile systems have been diffused worldwide. One is called as 5G New Radio (NR) SA (S... [more] RCS2021-58
pp.175-179
RCS 2021-06-25
14:35
Online Online Outdoor Experimental Trials of 28 GHz-Band Base Station Cooperation Technologies in High-Mobility Environments with Mobile Stations
Tatsuki Okuyama, Satoshi Suyama, Nobuhide Nonaka, Takahiro Asai (NTT DOCOMO) RCS2021-74
 [more] RCS2021-74
pp.261-266
RCS, IN, NV
(Joint)
2021-05-27
16:00
Online Online 6G System-Level Simulators in 100 GHz Band
Tatsuki Okuyama, Satoshi Suyama, Nobuhide Nonaka, Takahiro Asai (NTT DOCOMO) RCS2021-22
 [more] RCS2021-22
pp.35-40
RCS, SR, SRW
(Joint)
2021-03-05
10:30
Online Online Performance Evaluation of Base Station Cooperation Technologies in Millimeter-Wave Bands at Variable Base Station Deployments under High-Mobility Environments
Tatsuki Okuyama, Satoshi Suyama, Nobuhide Nonaka, Takahiro Asai (NTT DOCOMO) RCS2020-249
Commercial services of 5th generation mobile communication system (5G) are expanding. In 5G, Massive MIMO -based beamfor... [more] RCS2020-249
pp.207-211
RCS, SR, SRW
(Joint)
2021-03-05
09:00
Online Online Adaptive Channel Prediction over Multi-Cluster and Time-Varying Channels for Analog-Digital-Hybrid Massive MIMO Systems
Kenta Tsuge, Yuyuan Chang, Kazuhiko Fukawa (Tokyo Tech), Satoshi Suyama, Takahiro Asai (NTT DOCOMO) RCS2020-252
For 5G massive MIMO systems, hybrid beamforming (HB), which is composed of the analog beamforming (AB) and the digital b... [more] RCS2020-252
pp.222-227
SIP, IT, RCS 2021-01-21
10:55
Online Online Performance Evaluation of Convolutional Poalr Code with Neural Network Decoder
Riko Maeda (Kagawa Univ.), Satoshi Suyama, Takahiro Asai (NTT DOCOMO), Nobuhiko Miki (Kagawa Univ.) IT2020-67 SIP2020-45 RCS2020-158
The Polar code proposed by Arıkan is a code that can achieve a property approaching the Shannon limit under successive c... [more] IT2020-67 SIP2020-45 RCS2020-158
pp.23-27
SIP, IT, RCS 2021-01-22
17:10
Online Online [Encouragement Talk] Feasibility Study on Applicability of Non-linear Precoding Based on Outdoor Measurement for High SHF Wide-band Massive MIMO in 5G
Manabu Sakai, Hiroki Iura, Kenji Nakagawa, Hiroshi Nishimoto (Mitsubishi Electric), Nobuhide Nonaka, Satoshi Suyama, Takahiro Asai (DOCOMO) IT2020-101 SIP2020-79 RCS2020-192
 [more] IT2020-101 SIP2020-79 RCS2020-192
pp.212-217
NS, RCS
(Joint)
2020-12-18
11:15
Online Online A Study of 6G Radio Access Technologies for Achieving 100 Gbps Data Rate by Extreme Wideband Transmission Using Higher Frequency Bands
Satoshi Suyama, Tatsuki Okuyama, Yoshihisa Kishiyama, Nobuhide Nonaka, Takahiro Asai (NTT DOCOMO) RCS2020-146
In sixth-generation (6G) mobile communication system, it is expected that a extreme hgih data rate coomunication with a ... [more] RCS2020-146
pp.66-71
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