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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS, SR, SRW (Joint) |
2025-03-05 10:20 |
Kyoto | Kyoto Institute of Technology (Kyoto, Online) (Primary: On-site, Secondary: Online) |
Performance evaluation of subarray-distributed MU-MIMO using null-space expansion
-- Effect of element space and scattering radius -- Masaharu Abiru, Makoto Taromaru (Fukuoka Univ.), Hidekazu Murata (Yamaguchi Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Takafumi Fujita (NTT) |
[more] | |
| RCS, SR, SRW (Joint) |
2025-03-06 15:40 |
Kyoto | Kyoto Institute of Technology (Kyoto, Online) (Primary: On-site, Secondary: Online) |
Transmission performance of MIMO linear signal separation scheme using null-space expansion technique in distributed MIMO system Yuki Ohi, Hidekazu Murata (Yamaguchi Univ.), Makoto Taromaru (Fukuoka Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Takafumi Fujita (NTT) |
[more] | |
| RCS, AP (Joint) |
2024-11-14 14:05 |
Ishikawa | (Ishikawa, Online) (Primary: On-site, Secondary: Online) |
Switching technology on ultra-high speed mobility environment between 60-GHz wireless LAN and 5G/LTE using distance estimation Tatsuhiko Iwakuni, Daisei Uchida, Tomohiro Sakata, Takafumi Fujita (NTT)  RCS2024-162 |
Combination of multiple wireless communication system is required in future wireless communication to satisfy diversifie... [more] | RCS2024-162 pp.51-56 |
| 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 |
| RCS | 2024-06-20 09:40 |
Okinawa | (Okinawa, Online) (Primary: On-site, Secondary: Online) |
Theoretical study on SINR performance of MIMO with null-space expansion
-- Relation between null space and conditional probability density of fluctuating channels -- Masaharu Abiru, Makoto Taromaru (Fukuoka Univ.), Hidekazu Murata (Yamaguchi Univ.), Tatsuhiko Iwakuni, Daisei Uchida, Toshifumi Miyagi (NTT) RCS2024-54 |
When a mobile terminal connected with MIMO moves in high speed, the channel capacity is degraded because the channel mat... [more] | RCS2024-54 pp.157-161 |
| IN, RCS, NV (Joint) |
2024-05-30 11:15 |
Fukuoka | Fukuoka University (Fukuoka) | 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) RCS2024-17 |
When a mobile terminal connected with MIMO moves in high speed, the channel capacity is degraded because the channel mat... [more] | RCS2024-17 pp.19-23 |
| RCS, SR, SRW (Joint) |
2024-03-13 10:20 |
Tokyo | The University of Tokyo (Hongo Campus), and online (Tokyo, 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 |
| 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 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 |
| SIS, ITE-BCT | 2023-10-12 14:45 |
Yamaguchi | HISTORIA UBE (Yamaguchi, Online) (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] | |
| RCS, SR, SRW (Joint) |
2023-03-01 11:15 |
Tokyo | Tokyo Institute of Technology, and Online (Tokyo, 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 (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] | |
| AP | 2022-04-15 11:50 |
Yamagata | Yamagata Syokuryo Kaikan (Yamagata, Online) (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 |
| 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 |
| NS, RCS (Joint) |
2020-12-18 13:25 |
Online | 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 |
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