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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| EMCJ, MICT (Joint) |
2023-03-17 14:50 |
Tokyo | Kikai-Shinko-Kaikan Bldg (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Proposal and prototype of a varactor-loaded continuous variable phase shifter for noise reduction during phase switching Kazuaki Maruyama, Atsuhiro Nishikata (Titech), Yushi Shirato, Yasuyoshi Yamamoto, Yuta Takahashi, Naoki Kita (NTT)  EMCJ2022-92 |
[more] | EMCJ2022-92 pp.1-6 |
| AP | 2023-03-17 14:10 |
Toyama | Toyama Prefectural Civic Hall (Toyama, Online) (Primary: On-site, Secondary: Online) |
Experimental Evaluation of Staircase Array Antenna employing Butler Matrix Hideya So, Takana Kaho (SIT), Yasuyoshi Yamamoto, Mizuki Suga, Yuta Takahashi, Yushi Shirato, Naoki Kita (NTT) AP2022-249 |
The authors have proposed a staircase array antenna consisting of a one-dimensional butler matrix and patch array antenn... [more] | AP2022-249 pp.87-92 |
| RCS, AP, UWT (Joint) |
2022-11-16 16:25 |
Fukuoka | Kyushu University, and Online (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Study of Distributed Antenna System at Higher Frequency Band using Analog-RoF toward 6G Naoki Kita, Yushi Shirato, Yasuyoshi Yamamoto, Yuuta Takahashi, Kota Ito (NTT) AP2022-159 RCS2022-173 |
[more] | AP2022-159 RCS2022-173 pp.67-72(AP), pp.106-111(RCS) |
| CQ, CS (Joint) |
2022-05-13 13:50 |
Fukui | Fukui (Fuku Pref.) (Fukui, Online) (Primary: On-site, Secondary: Online) |
[Special Invited Talk]
Analog-RoF and Distributed MIMO Techniques in Higher Frequency Bands for 6G/IOWN Takeshi Onizawa, Naoki Kita, Yushi Shirato, Daisei Uchida, Hideki Toshinaga (NTT) CQ2022-15 |
In this report, we describe analog-radio over fiber (A-RoF) and distributed multiple-input multiple-output (MIMO) techni... [more] | CQ2022-15 pp.80-85 |
| AP, WPT (Joint) |
2022-01-21 13:30 |
Tottori | Kenmin-Fureai-Kaikan (Tottori, Online) (Primary: On-site, Secondary: Online) |
Proposal on Novel Staircase Array Antenna Configuration utilizing Stacked Butler Matrix Hideya So, Yoshitada Watanabe, Takana Kaho (SIT), Mizuki Suga, Takuto Arai, Yushi Shirato, Hideki Toshinaga, Daisei Uchida, Naoki Kita (NTT) AP2021-151 |
Massive Multiple-Input Multiple-Output (Massive MIMO), which uses a large number of antenna elements, has been investiga... [more] | AP2021-151 pp.92-97 |
| MWP | 2021-11-26 13:50 |
Online | Online (Online) | [Invited Talk]
R&D for Higher Frequency Bands Radio-over-Fiber Systems Yushi Shirato, Kota Ito, Mizuki Suga, Takuto Arai, Yuta Takahashi, Yasuyoshi Yamamoto, Naoki Kita (NTT) MWP2021-31 |
In order to enhance the transmission capacity, it is effective to use higher frequency band radio waves with abundant fr... [more] | MWP2021-31 pp.6-11 |
| AP, SANE, SAT (Joint) |
2021-07-30 14:30 |
Online | Online (Online) | [Invited Lecture]
Visibility Analysis in a Human Body Shadowing Environment and Distributed Antenna Installations for Millimeter and Terahelz Wave Mobile Communications Naoki Kita, Yushi Shirato, Daisei Uchida (NTT), Koji Yamamoto (Kyoto Univ.) AP2021-45 |
Development ofmmWave or higher frequency bands where rich frequency bandwidth resources are available is widely discusse... [more] | AP2021-45 pp.120-125 |
| RCS, AP, UWT (Joint) |
2020-11-26 15:15 |
Online | Online (Online) | Stochastic Geometry Analysis of Probability and Autocorrelation of Human Blockage in mmWave Communications Koji Yamamoto (Kyoto Univ.), Chun-hsiang Huang, Yushi Shirato, Daisei Uchida, Naoki Kita (NTT) RCS2020-128 |
This report provides the probabilities of human-body blockage and blockage avoidance, and autocorrelation function for h... [more] | RCS2020-128 pp.99-103 |
| MW, EST, EMCJ, PEM, IEE-EMC [detail] | 2020-10-22 12:15 |
Online | Online (Online) | An Investigation on Transmission Characteristics Improvement Method by Double-sided Impedance Matching Using Metal Patch Array on Reinforced Concrete Wall Takanobu Nakajyo, Atsuhiro Nishikata (Tokyo Tech), Kota Ito, Yushi Shirato, Naoki Kita (NTT Access Network Service Systems Laboratories) EMCJ2020-31 MW2020-45 EST2020-33 |
[more] | EMCJ2020-31 MW2020-45 EST2020-33 pp.36-41 |
| MWP | 2020-05-28 14:30 |
Online | Online (Online) | Experimental Evaluation of Remote Beamforming Scheme for Higher Frequency Band Radio-over-Fiber Systems Kota Ito, Mizuki Suga, Yushi Shirato, Naoki Kita (NTT) MWP2020-2 |
We have proposed remote beamforming scheme for higher frequency band, which can remotely control the beam direction of b... [more] | MWP2020-2 pp.7-12 |
| EMCJ, MICT (Joint) |
2020-03-13 16:05 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Tokyo) (Cancelled but technical report was issued) |
EMCJ2019-95 |
In recent years, radio resources such as allocated frequency, polarization, space, and time have been tightened due to t... [more] | EMCJ2019-95 pp.15-20 |
| MIKA (2nd) |
2019-10-03 11:15 |
Hokkaido | Hokkaido Univ. (Hokkaido) | [Poster Presentation]
ASK+BPSK Modulation Experiment for the Full-Duplex Communication by using 3×4 Element Van-Atta Array Yuki Mizukoshi, Atsuhiro Nishikata (Tokyo Tech), Kota Ito, Yushi Shirato, Naoki Kita (NTT) |
[more] | |
| EMCJ | 2019-07-18 16:20 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Tokyo) | Establishing transmission and scattering simulation model of building wall at 2.4GHz band with experimental evaluation of transmission characteristics Takanobu Nakajyo, Atsuhiro Nishikata (Tokyo Tech), Kota Ito, Yushi Shirato, Naoki Kita (NTT) EMCJ2019-29 |
[more] | EMCJ2019-29 pp.65-69 |
| WPT, AP (Joint) |
2019-01-18 12:30 |
Aichi | Toyota Automobile Museum (Aichi) | [Invited Lecture]
Study on Characteristics of Arrival Angular Spread at High Microwave-band Naoki Kita, Yushi Shirato, Hideki Toshinaga (NTT) AP2018-162 |
[more] | AP2018-162 pp.63-68 |
| NS, ASN, RCC, RCS, SR (Joint) |
2017-07-21 11:30 |
Hokkaido | Hokkaido Univ. (Hokkaido) | 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 |
| NS, RCS (Joint) |
2016-12-22 15:10 |
Ishikawa | (Ishikawa) | Digital Assisted Analog Beamforming (DAABF) on Millimeter Wave Massive Antenna Array
-- Basic Concept of DAABF -- Atsuhi Ohta, Kazuki Maruta, Yushi Shirato, Satoshi Kurosaki, Ken Tanaka, Masataka Iizuka (NTT) RCS2016-232 |
[more] | RCS2016-232 pp.135-140 |
| NS, RCS (Joint) |
2016-12-22 15:35 |
Ishikawa | (Ishikawa) | Digital Assisted Analog Beamforming (DAABF) on Millimeter Wave Massive Antenna Array
-- Performance Evaluation of DAABF via Computer Simulation -- Kazuki Maruta, Atsuhi Ohta, Yushi Shirato, Satoshi Kurosaki, Ken Tanaka, Masataka Iizuka (NTT) RCS2016-233 |
Toward the 5th Generation Mobile Communications (5G), a lot of wireless communication technologies such as massive MIMO ... [more] | RCS2016-233 pp.141-146 |
| RCS | 2016-04-22 14:10 |
Aomori | Romantopia, A Landscape of Forest and Stars, Hirosaki City (Aomori) | 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 (Aomori) | 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 (Ehime) | 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 |
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