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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 63件中 1~20件目  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
SIP, IT, RCS 2018-01-22
14:55
Kagawa Sunport Hall Takamatsu A Study on Multi-beam Stadium Wi-Fi with Massive MIMO
Atsushi Ohta, Ken Tanaka, Kazuto Goto, Naoki Kita (NTT) IT2017-79 SIP2017-87 RCS2017-293
 [more] IT2017-79 SIP2017-87 RCS2017-293
pp.143-148
AP, RCS
(Joint)
2017-11-08
16:45
Fukuoka Fukuoka University Low latency ARQ scheme for Wireless entrance systems for 5G small cell base stations
Atsushi Ohta, Satoshi Kurosaki, Kazuto Goto, Yutaka Imaizumi, Naoki Kita (NTT) RCS2017-218
Toward 5th generation mobile communications system, various researches for small cells with massive MIMO, which are effe... [more] RCS2017-218
pp.75-80
NS, ASN, RCC, RCS, SR
(Joint)
2017-07-21
11:30
Hokkaido Hokkaido Univ. Antenna Design for Low Correlation Directional Beam-forming on Wireless Entrance Systems with High Frequency Band
Atsushi Ohta, Ken Tanaka, Yushi Shirato, Mizuki Suga, Kazuto Goto, Masataka Iizuka (NTT) RCS2017-136
 [more] RCS2017-136
pp.221-226
RCS 2017-06-22
15:35
Okinawa Ishigaki Shoukou Kaikan Experimental Evaluation for Wireless Entrance to Street Small Cell with 75 GHz Channel Measurement
Takahiro Tsuchiya, Kazuto Goto, Mizuki Suga, Chunhsiang Huang, Hideyuki Tsuboi, Satoshi Kurosaki, Atsushi Ohta, Masataka Iizuka (NTT) RCS2017-74
Toward realization of 5th Generation Mobile Communications (5G), we have proposed 1-tap time-domain beamforming (TDBF) a... [more] RCS2017-74
pp.143-148
RCS 2017-06-22
16:00
Okinawa Ishigaki Shoukou Kaikan Beam Forming Schemes on Wireless Entrance Systems for Street Small Cells -- Performance Evaluation with 75GHz Outdoor/Indoor Propagation Measurement --
Kazuto Goto, Takahiro Tsuchiya, Mizuki Suga, Atsushi Ohta, Masataka Iizuka (NTT) RCS2017-75
Toward the 5th Generation Mobile Communications (5G), by using massive MIMO, small cell constructing technologies for of... [more] RCS2017-75
pp.149-154
NS, CQ, ICM, NV
(Joint)
2016-11-24
17:05
Yamaguchi Shimonoseki Chember of Commerce and Industry [Invited Talk] The state of art of SD-WAN solution and evaluation results
Atsushi Ohta (BOSCO), Koichi Nakajima (NISSHO), Tsunemasa Hayashi, Hiroki Nakayama (BOSCO) NS2016-110 CQ2016-82 ICM2016-28
 [more] NS2016-110 CQ2016-82 ICM2016-28
pp.49-54(NS), pp.47-52(CQ), pp.19-24(ICM)
RCS 2016-04-22
14:10
Aomori Romantopia, A Landscape of Forest and Stars, Hirosaki City Multiuser Parallel Transmission by Sub Array Time Domain Beamforming on Massive MIMO using Higher Frequency Bands
Kazuki Maruta, Atsushi Ohta, Takuto Arai, Yushi Shirato, Satoshi Kurosaki, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) RCS2016-20
Drastic improvements of transmission rate and system capacity are required towards 5th generation mobile communications ... [more] RCS2016-20
pp.111-116
RCS 2016-04-22
14:35
Aomori Romantopia, A Landscape of Forest and Stars, Hirosaki City Experimental Verification of Multiuser Massive MIMO Null-Space Expansion using Measured Channel State Information
Tatsuhiko Iwakuni, Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2016-21
Transmission capacity of multiuser MIMO systems is degraded by inter-user interference (IUI) caused due to channel time ... [more] RCS2016-21
pp.117-122
NS, RCS
(Joint)
2015-12-18
13:30
Ehime Matsuyama Community Center Wireless Backhaul for Train-type Moving Cell with Time-domain Beam-forming
Atsushi Ohta, Yushi Shirato, Satoshi Kurosaki, Kazuki Maruta, Takuto Arai, Tatsuhiko Iwakuni, Ken Tanaka, Masataka Iizuka (NTT) RCS2015-272
 [more] RCS2015-272
pp.169-174
AP, RCS, WPT, SAT
(Joint)
2015-11-04
12:15
Okinawa Okinawa Prefectural Museum & Art Museum Transmission Performance Evaluation of Multiuser Massive MIMO Null-Space Expansion for Time Varying Channel
Tatsuhiko Iwakuni, Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2015-198
Inter-user interference (IUI) caused by channel time variation reduces multiuser MIMO transmission capacity. Massive MIM... [more] RCS2015-198
pp.49-54
AP, RCS, WPT, SAT
(Joint)
2015-11-05
09:30
Okinawa Okinawa Prefectural Museum & Art Museum Multiuser Massive MIMO Exploiting First Eigenmode Transmission in Higher Frequency Bands
Kazuki Maruta, Tatsuhiko Iwakuni, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2015-205
Drastic improvements of transmission rate and system capacity are required towards 5th generation mobile communications ... [more] RCS2015-205
pp.91-96
AP, RCS, WPT, SAT
(Joint)
2015-11-06
14:00
Okinawa Okinawa Prefectural Museum & Art Museum [Invited Lecture] Effective use of the First Eigen-modes on Massive MIMO communication in LOS environment
Atsushi Ohta, Yushi Shirato, Kazuki Maruta, Takuto Arai, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) AP2015-150 RCS2015-239
 [more] AP2015-150 RCS2015-239
pp.231-236(AP), pp.293-298(RCS)
RCS, SAT
(Joint)
2015-08-18
09:30
Fukuoka Fukuoka Univ. High Efficient Spatial Division Multiplexing Technique with the First Eigen-mode Parallel Transmission on Millimeter Wave Band in LOS Environment -- Basic Concept and Its Performance Evaluation --
Atsushi Ohta, Takuto Arai, Yushi Shirato, Kazuki Maruta, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) RCS2015-144
 [more] RCS2015-144
pp.73-78
RCS, SAT
(Joint)
2015-08-18
09:55
Fukuoka Fukuoka Univ. High Efficient Spatial Division Multiplexing Technique with the First Eigen-mode parallel transmission on millimeter wave band in LOS environment -- Effective channel feedback scheme --
Takuto Arai, Atsushi Ohta, Yushi Shirato, Kazuki Maruta, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) RCS2015-145
In the previous paper, the authors have discussed the practical Massive MIMO system in LOS environment where the base st... [more] RCS2015-145
pp.79-84
RCS, SAT
(Joint)
2015-08-18
15:30
Fukuoka Fukuoka Univ. Uplink Interference Suppression by MMSE-CMA Adaptive Array on Multicell Massive MIMO Systems
Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Satoshi Kurosaki, Takuto Arai, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) RCS2015-154
This paper proposes uplink interference suppression scheme for multicell massive MIMO systems. Single frequency reuse is... [more] RCS2015-154
pp.129-134
RCS 2015-06-24
15:45
Hokkaido Hokkaido Univ. Massive Antenna Periodical Offset Arrangement to Achieve Spatial Correlation Reduction
Takuto Arai, Atsushi Ohta, Yushi Shirato, Kazuki Maruta, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) RCS2015-53
As key technologies for Massive Antenna Systems for Wireless Entrance (MAS-WE) exploiting line of sight channel characte... [more] RCS2015-53
pp.43-48
RCS 2015-06-24
16:10
Hokkaido Hokkaido Univ. Effective Use of Spatial Dimension for Inter-user Interference suppression on Multiuser Massive MIMO under Time Varying Channel Environment
Atsushi Ohta, Tatsuhiko Iwakuni, Kazuki Maruta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2015-54
The authors have proposed the Inter-user Interference (IUI) suppression scheme on Multiuser Massive MIMO which utilizes ... [more] RCS2015-54
pp.49-54
RCS 2015-04-17
12:35
Oita Yufuin, Yufugoukan Continuous Beamforming Space Division Multiple Access and Frequency Domain Backoff Scheme on Massive Antenna Systems for Wireless Entrance
Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Satoshi Kurosaki, Takuto Arai, Tatsuhiko Iwakuni, Masataka Iizuka (NTT) RCS2015-16
This paper newly proposes Continuous Beamforming Space Division Multiple Access (CB-SDMA) on Massive Antenna Systems for... [more] RCS2015-16
pp.83-88
RCS 2015-04-17
13:00
Oita Yufuin, Yufugoukan Inter-user Interference Suppression with Null-Space Extension in Multiuser Massive MIMO for Time Varying Channel
Tatsuhiko Iwakuni, Kazuki Maruta, Atsushi Ohta, Yushi Shirato, Takuto Arai, Masataka Iizuka (NTT) RCS2015-17
This paper proposes a new IUI suppression technique named “Null-Space Extension” with Massive MIMO in time varying chann... [more] RCS2015-17
pp.89-94
RCS 2014-06-18
16:10
Okinawa Okinawa-ken Seinenkaikan (Naha) Multi-planar parallelogram array antennas and simplified user scheduling for Massive Antenna Systems for wireless entrance (MAS-WE)
Takuto Arai, Atsushi Ohta, Kazuki Maruta, Masataka Iizuka (NTT) RCS2014-78
The authors have proposed Massive Antenna Systems for Wireless Entrance (MAS-WE) and effectiveness of the proposed syste... [more] RCS2014-78
pp.269-274
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