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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCC, RCS, SeMI, NS, SR, RISING (Joint) |
2024-07-18 16:45 |
Hokkaido | Hokkaido Citizens Activities Promotion Center (Hokkaido, Online) (Primary: On-site, Secondary: Online) |
A Study on Channel Environment Prediction Using Key-Value Vector Database Based on Angular Power Profile in Millimeter-wave Communications Kohei Mitani, Kazunori Hayashi (Kyoto Univ), Koji Yamamoto (KIT), Takuto Arai, Shuki Wai, Tatsuhiko Iwakuni, Daisei Uchida (NTT)  RCS2024-105 |
This study investigates prediction methods of obstacle positions and received signal power in millimeter-wave communicat... [more] | RCS2024-105 pp.107-112 |
| AP, RCS (Joint) |
2023-11-16 11:00 |
Kumamoto | Kumamoto Prefectural Workers' Welfare Hall (Kumamoto, Online) (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) (Hokkaido) | [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) (Hokkaido) | [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] | |
| RCS | 2023-10-19 16:40 |
Kagawa | Kagawa University (Saiwai-cho Campus), and online (Kagawa, 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 |
| RCS, SR, SRW (Joint) |
2023-03-03 15:50 |
Tokyo | Tokyo Institute of Technology, and Online (Tokyo, 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 |
| SeMI, SeMI (Joint) |
2023-01-19 15:35 |
Tokushima | Naruto grand hotel (Tokushima, Online) (Primary: On-site, Secondary: Online) |
[Short Paper]
Comparative Study of Object Localization by mmWave Sensing and Acoustic Wave Sensing Ryosuke Hanahara, Itsuki Yonemura, Koji Yamamoto (Kyoto Univ.), Takuto Arai, Shuki Hideki, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) SeMI2022-84 |
This paper compares sensing of indoor communication environments using the beam search method in millimeter-wave (mmWave... [more] | SeMI2022-84 pp.54-56 |
| SeMI, SeMI (Joint) |
2023-01-19 16:05 |
Tokushima | Naruto grand hotel (Tokushima, Online) (Primary: On-site, Secondary: Online) |
[Short Paper]
Received SNR Prediction Using Two-sided Beam Search in mmWave Communication: An Experimental Study Itsuki Yonemura, Ryosuke Hanahara, Takamochi Kanda, Koji Yamamoto (Kyoto Univ.), Takuto Arai, Syuki Wai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) SeMI2022-87 |
This paper experimentally demonstrates a novel received signal-to-noise ratio (SNR) prediction based on a two-sided beam... [more] | SeMI2022-87 pp.65-69 |
| RISING (3rd) |
2022-10-31 10:30 |
Kyoto | Kyoto Terrsa (Day 1), and Online (Day 2, 3) (Kyoto, Online) | [Poster Presentation]
Blockage Prediction Using Transmit/Receive Beam-pairs in mmWave Networks Itsuki Yonemura, Takamochi Kanda, Ryosuke Hanahara, Koji Yamamoto (Kyoto Univ.), Takuto Arai, Shuki Wai, Tatsuhiko Iwakuni, Daisei Uchida, Naoki Kita (NTT) |
This study experimentally demonstrates a novel blockage prediction based on exhaustive beam-pair scan in millimeter wav... [more] | |
| RCS | 2022-10-28 12:10 |
Ehime | Ehime University, and online (Ehime, Online) (Primary: On-site, Secondary: Online) |
Concept and Issues of New Radio Network Topology for 5G Evolution & 6G Masashi Iwabuchi (NTT), Satoshi Suyama (NTT DOCOMO), Takuto Arai (NTT), Mitsuki Nakamura, Kenta Goto (NTT DOCOMO), Riku Ohmiya, Daisei Uchida (NTT), Takayuki Yamada (NTT DOCOMO), Tomoaki Ogawa (NTT) RCS2022-148 |
[more] | RCS2022-148 pp.101-106 |
| 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 |
| RCS | 2021-10-21 13:00 |
Online | 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 (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 |
| RCS, RCC, ASN, NS, SR (Joint) |
2016-07-22 14:10 |
Aichi | (Aichi) | Proposal of Access Point (AP) location algorithm based on High Density User Areas in Adaptive Movable AP Systems Daisuke Goto, Takuto Arai, Masashi Iwabuchi, Tatsuhiko Iwakuni, Kazuki Maruta (NTT) RCS2016-125 |
We proposed Adaptive Movable Access Point System (AMAP) which controls APs locations for improvement of traffic offload ... [more] | RCS2016-125 pp.159-164 |
| IN, RCS (Joint) |
2016-05-20 15:15 |
Tokyo | Kikai-Shinko-Kaikan Bldg. (Tokyo) | AMAP: Adaptive Movable Access Point System for Offloading Efficiency Enhancement Takuto Arai, Daisuke Goto, Masashi Iwabuchi, Tatsuhiko Iwakuni, Kazuki Maruta (NTT) RCS2016-43 |
Offloading data traffic is one of the most important solutions for cellular system congestion. Congestion of the cellula... [more] | RCS2016-43 pp.107-112 |
| 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 |
| AP, RCS, WPT, SAT (Joint) |
2015-11-04 12:15 |
Okinawa | Okinawa Prefectural Museum & Art Museum (Okinawa) | 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 |
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