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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 18 of 18  /   
Committee Date Time Place Paper Title / Authors Abstract Paper #
RCS, AP, UWT
(Joint)
2022-11-16
16:25
Fukuoka Kyushu University, and Online
(Primary: On-site, Secondary: Online)
[Invited Lecture] Analog-RoF and Distributed Antenna Techniques in Higher Frequency Bands toward 6G/IOWN
Naoki Kita, Yushi Shirato, Daisei Uchida, Hideki Toshinaga (NTT)
 [more]
RCS 2022-10-28
12:10
Ehime Ehime University, and online
(Primary: On-site, Secondary: Online)
Concept and Issues of New Radio Network Topology for 5G Evolution and 6G
Masashi Iwabuchi, Daisei Uchida, Takuto Arai (NTT), Satoshi Suyama, Takayuki Yamada, Mitsuki Nakamura (NTT DOCOMO)
 [more]
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
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 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
AP 2019-08-21
13:30
Hokkaido Hokkai-Gakuen Univ. A Study on Beamwidth Narrowing and Gain Enhancement of a Patch Array Antenna by Loading Dielectric Superstrate
Tatsuro Shigihara, Takashi Hikage, Manabu Yamamoto (Hokkaido Univ.), Daisei Uchida (NTT) AP2019-47
 [more] AP2019-47
pp.1-6
MoNA, AN, USN
(Joint)
2013-01-25
15:00
Miyagi ICHINOBO (Sendai-city) A Study of Accommodation Design for Sensor Divices in User-centric Wireless Networks
Daisei Uchida, Mamoru Kobayashi, Yushi Shirato, Hideki Toshinaga, Hiroyuki Shiba, Shuichi Yoshino (NTT) USN2012-75
In recent years, wireless networks are rapidly diffused in home networks with widespread use of smartphones and tablets.... [more] USN2012-75
pp.85-90
IN 2011-04-21
15:30
Kagawa Kagawa University [Invited Talk] Wide Area Ubiquitous Network -- Implementation for Ubiquitous Sensor Network --
Daisei Uchida (NTT) IN2011-7
One of key techniques to realize ubiquitous network is ubiquitous sensor network (USN) to support machine-to-machine (M2... [more] IN2011-7
pp.35-40
RCS 2009-08-03
11:45
Miyagi Tohoku Univ. A Study on Space Diversity for Direction of Arrival Estimation Method
Seiji Ohmori, Daisei Uchida, Takafumi Fujita, Yosuke Fujino (NTT) RCS2009-84
Many high-resolution direction-of-arrival(DoA) estimation methods using array antenna have been proposed and they have b... [more] RCS2009-84
pp.37-42
RCS 2006-04-21
09:20
Osaka Osaka Univ. Nakanoshima Center A Burst Synchronization Method of Uplink Preamble-less Demodulators for Wide-area Ubiquitous Network
Takafumi Fujita, Daisei Uchida, Yosuke Fujino, Osamu Kagami, Kazuji Watanabe (NTT) RCS2006-2
This paper proposes a new burst synchronization method of Uplink Preamble-less demodulators for the wide-area ubiquitous... [more] RCS2006-2
pp.7-12
RCS 2006-04-21
09:40
Osaka Osaka Univ. Nakanoshima Center A Precise Estimation of Unknown Weight Vector Subspace for for Multi-target Constant Modulus Algorithm
Yosuke Fujino, Daisei Uchida, Osamu Kagami, Kazuji Watanabe (NTT) RCS2006-3
Multi-target Constant Modulus Algorithm has been known as a method for blindly separating multiple co-channel signals by... [more] RCS2006-3
pp.13-18
RCS, CS 2005-01-28
09:00
Okinawa University of the Ryukyus Simplified Blind Channel Tracking Scheme for MIMO-OFDM systems
Yusuke Asai, Daisei Uchida, Wenjie Jiang, Takeshi Onizawa, Atsushi Ohta, Satoru Aikawa (NTT Corporation)
A MIMO-OFDM system is well-known as the most promising technique for PHY (physical) layer scheme for the next high-speed... [more] CS2004-183 RCS2004-290
pp.1-6
 Results 1 - 18 of 18  /   
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