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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 55  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
COMP, IPSJ-AL 2022-05-20
14:10
Online Online Computational Power of A Memoryless Mobile Agent in Undirected Rings
Taichi Inoue, Naoki Kitamura, Taisuke Izumi, Toshimitsu Masuzawa (Osaka Univ.) COMP2022-8
We consider the system where a single mobile agent is deployed in an anonymous, oriented, and undirected ring of $n$ ver... [more] COMP2022-8
pp.46-53
CQ, CS
(Joint)
2022-05-13
13:50
Fukui Fukui (Fuku Pref.)
(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 2022-04-15
11:50
Yamagata Yamagata Syokuryo Kaikan
(Primary: On-site, Secondary: Online)
A study on gain reduction suppression in a wideband slot array antenna with a reflector
Naoya Yamamoto, Takashi Hikage, Manabu Yamamoto (Hokkaido Univ.), Shuki Wai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) AP2022-6
 [more] AP2022-6
pp.28-33
AP, WPT
(Joint)
2022-01-21
13:30
Tottori Kenmin-Fureai-Kaikan
(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 [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
RCS 2021-10-21
13:00
Online Online Initial access beam search method with variable beam width according to the area size
Takuto Arai, Tatsuhiko Iwakuni, Syuki Wai, Daisei Uchida, Naoki Kita (NTT) RCS2021-122
High gain antennas using narrow-beamforming are required to compensate for high propagation loss in high frequency bands... [more] RCS2021-122
pp.25-30
RCS 2021-10-21
13:25
Online Online A New Beam Search Based on Combination History of Selected Beams among Antennas for Distributed Antenna System
Shuki Wai, Tatsuhiko Iwakuni, Takuto Arai, Daisei Uchida, Naoki Kita (NTT) RCS2021-123
Distributed antenna system using high-frequency bands such as millimeter-wave and sub-terahertz is expected to be one of... [more] RCS2021-123
pp.31-36
AP, SANE, SAT
(Joint)
2021-07-30
14:30
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
NS, RCS
(Joint)
2020-12-18
13:25
Online Online [Invited Lecture] Distributed Antenna Systemes using High-Frequency-Band targeting 6G Wireless Networks
Daisei Uchida, Tatsuhiko Iwakuni, Naoki Kita, Takeshi Onizawa (NTT), Yoshihisa Kishiyama, Satoshi Suyama, Satoshi Nagata, Takahiro Asai (docomo) NS2020-101 RCS2020-148
High-Speed and broadband network transformation is needed for multi-points collecting sensing data and distributing movi... [more] NS2020-101 RCS2020-148
pp.73-78
RCS, AP, UWT
(Joint)
2020-11-26
15:15
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 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
AP, SANE, SAT
(Joint)
2020-07-16
14:00
Online Online [Tutorial Lecture] Radio Wave Propagation Model for Radiozone Design at High Frequency Band
Naoki Kita, Wataru Yamada, Motoharu Sasaki (NTT) AP2020-19
The term of “Radio zone” means the range where an electromagnetic wave can arrives with detective level. The evaluation ... [more] AP2020-19
pp.57-62
MWP 2020-05-28
14:30
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.
(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. [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]
AP 2019-08-21
16:05
Hokkaido Hokkai-Gakuen Univ. [Tutorial Lecture] International standardization activity of radio propagation and its recent topics
Wataru Yamada, Mitsuki Nakamura, Motoharu Sasaki, Naoki Kita, Nobuaki Kuno, Takatune Moriyama, Yasushi Takatori (NTT) AP2019-52
 [more] AP2019-52
pp.29-34
EMCJ 2019-07-18
16:20
Tokyo Kikai-Shinko-Kaikan Bldg. 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
RCS, IN, NV
(Joint)
2019-05-17
12:30
Kanagawa Keio University [Invited Lecture] Recent Research and Developments focusing on Fixed Wireless and Satellite Communication Systems
Takeshi Onizawa, Tsutomu Tatsuda, Naoki Kita, Fumihiro Yamashhita (NTT) IN2019-9 RCS2019-32
In this report, we describe recent research and developments focusing on fixed wireless and satellite communication syst... [more] IN2019-9 RCS2019-32
pp.31-36(IN), pp.53-58(RCS)
WPT, AP
(Joint)
2019-01-18
12:30
Aichi Toyota Automobile Museum [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
RCS, AP
(Joint)
2018-11-22
14:30
Okinawa Okinawa Industry Support Center [Invited Lecture] An Experimental Study on Delay Characteristics in VHF Band
Toshio Ito, Hayato Fukuzono, Masafumi Yoshioka, Tsutomu Tatsuta, Naoki Kita (NTT) AP2018-137 RCS2018-212
In the wireless communications using a VHF band, while the long distance transmission with low attenuation is expectable... [more] AP2018-137 RCS2018-212
pp.197-202(AP), pp.193-198(RCS)
 Results 1 - 20 of 55  /  [Next]  
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