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 Conference Papers (Available on Advance Programs)  (Sort by: Date Descending)
 Results 1 - 20 of 80  /  [Next]  
Committee Date Time Place Paper Title / Authors Abstract Paper #
IN, RCS, NV
(Joint)
2024-05-30
11:15
Fukuoka Fukuoka University Theoretical study on SINR performance of MIMO with null-space expansion -- Relation of null space to interference subspace in i.i.d. channels --
Makoto Taromaru, Masaharu Abiru (Fukuoka Univ.), Hidekazu Murata (Yamaguchi Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT), Masaharu Abiru (Fukuoka Univ.)
 [more]
RCS, SR, SRW
(Joint)
2024-03-13
10:20
Tokyo The University of Tokyo (Hongo Campus), and online
(Primary: On-site, Secondary: Online)
Study on Time-Varying Tolerance Enhancement Using Null-Space Expansion Technique for Linear MIMO Reception
Shohei Kobayashi, Yuki Ohi, Hidekazu Murata (Yamaguchi Univ.), Makoto Taromaru (Hukuoka Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) RCS2023-251
The transmission performance deteriorate if the combining weights for interference suppression are fixed within a packet... [more] RCS2023-251
pp.7-10
EMCJ 2024-01-19
13:50
Kumamoto   Investigation of the Improvement of Near-field Gain by Van Atta Array Retroreflector with Shift Distribution like Convex Lens
Daisuke Nishida, Atsuhiro Nishikata (Tokyo Tech), Yasuyoshi Yamamoto, Hideki Toshinaga, Naoki Kita (NTT) EMCJ2023-96
 [more] EMCJ2023-96
pp.49-54
COMP 2023-12-22
16:00
Miyazaki Miyazaki Univ. Machinaka Campus Uniform deployment of mobile robots with restricted views in path graphs
Kazuki Hasegawa, Naoki Kitamura, Taisuke Izumi, Toshimitsu Masuzawa (Osaka Univ.) COMP2023-26
We consider the uniform deployment of mobile robots on path graphs.The view each robot can observe is restricted in the ... [more] COMP2023-26
pp.61-67
NS, RCS
(Joint)
2023-12-14
10:35
Fukuoka Kyushu Institute of Technology Tobata campus, and Online
(Primary: On-site, Secondary: Online)
[Invited Lecture] Study of Transmit Timing Adjustment Function for Application of A-RoF System to TDD System
Yuta Takahashi, Yasuyoshi Yamamoto, Mizuki Suga, Hideki Toshinaga, Naoki Kita (NTT) NS2023-127 RCS2023-180
High-Speed and broadband network transformation is needed for 6G (sixth-generation wireless technology) era, it is neces... [more] NS2023-127 RCS2023-180
pp.21-25
AP, RCS
(Joint)
2023-11-15
13:00
Kumamoto Kumamoto Prefectural Workers' Welfare Hall
(Primary: On-site, Secondary: Online)
2D Pre-beamforming Control Method for Improving Performance of Fixed Wavelength Allocation Beamforming with Massive Planar Array Antenna
Mizuki Suga, Yuta Takahashi, Yasuyoshi Yamamoto, Hideki Toshinaga, Naoki Kita (NTT) RCS2023-155
Radio over fiber (RoF) is attracting much attention as one way to realize high frequency bands systems. A fixed waveleng... [more] RCS2023-155
pp.18-23
AP, RCS
(Joint)
2023-11-16
11:00
Kumamoto Kumamoto Prefectural Workers' Welfare Hall
(Primary: On-site, Secondary: Online)
[Invited Lecture] Fast Beam Search for Distributed Antenna Systems in High Frequency Bands
Shuki Wai, Takuto Arai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) AP2023-143 RCS2023-166
In order to further increase the capacity of wireless communications, attention is focused on the combination of high-fr... [more] AP2023-143 RCS2023-166
pp.67-72(AP), pp.71-76(RCS)
RISING
(3rd)
2023-10-31
09:45
Hokkaido Kaderu 2・7 (Sapporo) [Poster Presentation] Study of Localization Accuracy and Communication Performance of IRS-Assisted ISAC Systems
Mihiro Hashimoto, Koji Yamamoto, Itsuki Yonemura (Kyoto Univ.), Toshiro Nakahira, Daisuke Murayama, Takuto Arai, Daisei Uchida, Naoki Kita (NTT)
This study experimentally demonstrates a device-free localization in intelligent reflecting surface (IRS)-assisted milli... [more]
RISING
(3rd)
2023-10-31
13:00
Hokkaido Kaderu 2・7 (Sapporo) [Poster Presentation] Object Position Prediction Leveraging Both-side Angular Power Profiles in mmWave Communications
Itsuki Yonemura (Kyoto Univ.), Koji Yamamoto (KIT), Kazunori Hayashi (Kyoto Univ.), Takuto Arai, Shuki Wai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT)
This study experimentally demonstrates a novel position prediction leveraging both-side angular power profiles (APPs) sc... [more]
COMP 2023-10-24
16:20
Aichi Nagoya Univ. Venture Business Lab. Algorithm of uniform deployment for mobile robots in perfect bipartite graphs
Masahiro Shibata (Kyutech), Naoki Kitamura (Osaka Univ.), Ryota Eguchi (NAIST), Yuichi Sudo (Hosei Univ.), Junya Nakamura (Toyohashi Tech.), Yonghwan Kim, Yoshiaki Katayama (Nagoya Tech.), Toshimitsu Masuzawa (Osaka Univ.), Sebastien Tixeuil (Sorbonne Univ.) COMP2023-14
In this paper, we consider the uniform deployment problem of mobile robots in perfect bipartite graphs. Intuitively, whe... [more] COMP2023-14
pp.13-20
RCS 2023-10-19
16:40
Kagawa Kagawa University (Saiwai-cho Campus), and online
(Primary: On-site, Secondary: Online)
Transmission Performance and Handover Control Technique of 60-GHz Wireless LAN on Indoor Open Environment
Tatsuhiko Iwakuni, Daisei Uchida, Takuto Arai, Shuki Wai, Naoki Kita (NTT) RCS2023-137
Wireless communication system using high-frequency bands requires in-sight communication due to straightness of radio wa... [more] RCS2023-137
pp.39-44
SIS, ITE-BCT 2023-10-12
14:45
Yamaguchi HISTORIA UBE
(Primary: On-site, Secondary: Online)
Performance evaluation of null-space expanded linear reception technique over time-varying MIMO channels
Yuki Ohi, Hidekazu Murata (Yamaguchi Univ.), Makoto Taromaru (Fukuoka Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT)
This paper considers the improvement of multiple-input multiple-output signal separation performance using a linear spat... [more]
AP, SANE, SAT
(Joint)
2023-07-14
10:10
Hokkaido The Citizen Activity Center
(Primary: On-site, Secondary: Online)
Characteristics Evaluation of Wideband Slot Array Antenna with Slitted Reflector by Prototype Measurement
Yoshiki Ono, Takashi Hikage, Manabu Yamamoto (Hokkaido Univ.), Shuki Wai, Naoki Kita (NTT) AP2023-56
When the reflector is placed behind the broadband slot array antenna in order to make the radiation pattern of the anten... [more] AP2023-56
pp.139-144
EMCJ 2023-06-09
13:30
Hokkaido Otaru Chamber of Commerce & Industry
(Primary: On-site, Secondary: Online)
Circuit-theoretic calculation of scattering properties considering inter-element coupling in a two-dimensional Van Atta array
Daisuke Nishida, Atsuhiro Nishikata (Tokyo Tech), Yasuyoshi Yamamoto, Yuta Takahashi, Naoki Kita (NTT) EMCJ2023-21
 [more] EMCJ2023-21
pp.48-53
CS, CQ
(Joint)
2023-05-19
14:55
Kagawa Rexxam Hall (Kagawa Kenmin Hall)
(Primary: On-site, Secondary: Online)
[Special Invited Talk] Recent research and development of wireless techniques for realizing 6G/IOWN concept
Takeshi Onizawa, Naoki Kita, Toshifumi Miyagi, Fumihiro Yamashita (NTT) CS2023-14
In this report, we describe recent research and development of wireless techniques for realizing 6G/IOWN concepts. We co... [more] CS2023-14
pp.34-40
COMP, IPSJ-AL 2023-05-11
15:25
Hokkaido Hokkaido University Parameterized Complexity of Shortest Path Most Vital Edges Problem
Yuto Ashida, Naoki Kitamura, Taisuke Izumi, Toshimitsu Masuzawa (Osaka Univ.) COMP2023-6
Given an undirected graph $G$, vertices $s,t$ of $G$,and the number of removal edges $d$,the shortest paths most vital e... [more] COMP2023-6
pp.29-35
EMCJ, MICT
(Joint)
2023-03-17
14:50
Tokyo Kikai-Shinko-Kaikan Bldg
(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
(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, SR, SRW
(Joint)
2023-03-01
11:15
Tokyo Tokyo Institute of Technology, and Online
(Primary: On-site, Secondary: Online)
Performance Improvement of Linear MIMO Reception over Time-Variant Channels Using Null-Space Expansion
Yuki Ohi, Hidekazu Murata (Yamaguchi Univ.), Makoto Taromaru (Hukuoka Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) RCS2022-250
This paper considers the improvement of MIMO signal separation performance using a linear spatial filter in a time-varyi... [more] RCS2022-250
pp.21-24
RCS, SR, SRW
(Joint)
2023-03-03
15:50
Tokyo Tokyo Institute of Technology, and Online
(Primary: On-site, Secondary: Online)
Simultaneous Beam Search with Multiple Distributed Antennas for Distributed Antenna System
Shuki Wai, Takuto Arai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) RCS2022-295
Distributed antenna (DA) system using high-frequency bands such as millimeter-wave and sub-terahertz is expected to be o... [more] RCS2022-295
pp.249-254
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