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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS, SIP, IT | 2025-01-30 11:45 |
Yamaguchi | Kaikyou-messe (Yamaguchi, Online) (Primary: On-site, Secondary: Online) |
Double Selectivity Evaluation of Underwater Acoustic Communications in Shallow Sea Environments:Comparison between Simple Shaollw Sea Model Analysis and Shallow Sea Experimental Results Eiji Arita, Takaaki Shimomura (Ritsumeikan Univ), Mitsuyasu Deguchi, Yukihiro Kida, Takuya Shimura (JAMSTEC), Hiroshi Kubo (Ritsumeikan Univ) |
(To be available after the conference date) [more] | |
| UWT (2nd) |
2024-11-19 12:20 |
Kagoshima | (Kagoshima) | Double Selectivity Evaluation of Underwater Acoustic Communications in Shallow Sea Environments: Comparison between Simple Shallow Sea Model Analysis and Shallow Sea Experimental Results Eiji Arita, Takaaki Shimomura (Ritsumeikan Univ), Mitsuyasu Deguchi, Yukihiro Kida, Takuya Shimura (JAMSTEC), Hiroshi Kubo (Ritsumeikan Univ) |
This paper evaluates double selectivity for underwater acoustic communications (UWAC) in shallow sea environments assumi... [more] | |
| UWT (2nd) |
2024-11-19 16:25 |
Kagoshima | (Kagoshima) | Measurement of low-frequency EM wave propagation characteristics in three-layer structure of sea, sea ice and air in Arctic region Shinnosuke Sakaya (Chiba Univ.), Hiroshi Yoshida, Makoto Sugesawa (JAMSTEC), Masaharu Takahashi (Chiba Univ.) |
In recent years, various applications of EM waves in seawater have been investigated, and the authors have also investig... [more] | |
| UWT (2nd) |
2024-11-19 16:50 |
Kagoshima | (Kagoshima) | VLF dielectric constant measurement method for seawater and sea-ice Hiroshi Yoshida (JAMSTEC) |
[more] | |
| RCS, AP (Joint) |
2024-11-15 14:05 |
Ishikawa | (Ishikawa, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Suppression of Changes in Signal Length with Adaptive Digital Down-conversion Mitsuyasu Deguchi, Yukihiro Kida, Yoshitaka Watanabe, Takuya Shimura (JAMSTEC)  AP2024-155 RCS2024-171 |
Underwater acoustic communications are characterized by fast time-varying channel responses; therefore, equalization in ... [more] | AP2024-155 RCS2024-171 p.106(AP), p.99(RCS) |
| RCS, AP (Joint) |
2024-11-15 14:30 |
Ishikawa | (Ishikawa, Online) (Primary: On-site, Secondary: Online) |
[Invited Lecture]
A Sparse Constraint Adaptive Equalization Approach for High Rate Underwater Acoustic Communication with Deep-Sea Instruments. Yukihiro Kida, Mitsuyasu Deguchi, Takuya Shimura (JAMSTEC) AP2024-156 RCS2024-172 |
Underwater acoustic communication technology is the only practical wireless communication technology that connects deep ... [more] | AP2024-156 RCS2024-172 p.107(AP), p.100(RCS) |
| RCS | 2024-10-18 15:35 |
Tokyo | (Tokyo, Online) (Primary: On-site, Secondary: Online) |
A Double Selectivity Evaluation Scheme Using a Simple Shallow Sea Model for Underwater Acoustic Communications Hiroshi Kubo (Ritsumeikan Univ.), Mitsuyasu Deguchi, Yukihiro Kida, Takuya Shimura (JAMSTEC) RCS2024-150 |
This paper discusses a simple double selectivity evaluation scheme for underwater acoustic communications (UWAC) in shal... [more] | RCS2024-150 pp.71-76 |
| AP | 2024-10-17 12:50 |
Fukuoka | ACROS Fukuoka (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
[Poster Presentation]
Experimental Estimation of Phase and Attenuation Constants for Transmission between Dipole Antennas in Proximity to Vinyl Chloride Tubes in Simulated Submarine Salt Water Naoki Kuzu, Nozomu Ishii (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Qiaowei Yuan (Tohoku Institute of Tech.), Qiang Chen (Tohoku Univ.), Hiroshi Yoshida (JAMSTEC) AP2024-96 |
The authors have been studying the feasibility of building an undersea electromagnetic wave communication system for mai... [more] | AP2024-96 pp.107-112 |
| AP | 2024-10-17 12:50 |
Fukuoka | ACROS Fukuoka (Fukuoka, Online) (Primary: On-site, Secondary: Online) |
[Poster Presentation]
STUDY of UNDERSEA DRONE-MOUNTED ANTENNAS and PROPAGATION for MAINTENANCE and INSPECTION of WIND POWER GENERATION FACILITIES Sota Mutsuna, Hiroyasu Sato, Qiang Chen (Tohoku Univ.), Nozomu Ishii (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Qiaowei Yuan (Tohoku Inst. Tech.), Hiroshi Yoshida (JAMSTEC) AP2024-109 |
We propose a drone-mounted antenna that is excited by a low-loss transmission line made of cylindrical concrete, which i... [more] | AP2024-109 p.146 |
| US | 2024-08-27 14:40 |
Tokyo | Tokyo Tech Front, Tokyo Tech (Ookayama Campus) (Tokyo) | Evaluation of acoustic signal characteristics for GNSS-A observations using tank experiments Yuto Yoshizumi (UTokyo), Koya Nagae (JCG), Yusuke Yokota (UTokyo), Tadashi Ishikawa, Shun-ichi Watanabe, Yuto Nakamura (JCG), Tomohiro Inoue, Kenji Kouno (UTokyo), Takeshi Iinuma (JAMSTEC) US2024-38 |
Japan Coast Guard (JCG) operates SGO-A, which is a seafloor crustal deformation observation network using GNSS-A. GNSS-A... [more] | US2024-38 pp.21-26 |
| US | 2024-08-27 15:05 |
Tokyo | Tokyo Tech Front, Tokyo Tech (Ookayama Campus) (Tokyo) | Characteristics of acoustic ranging waveforms in SGO-A revealed by water tank experiments Koya Nagae (JCG), Yusuke Yokota (IIS,UT), Tadashi Ishikawa, Shun-ichi Watanabe, Yuto Nakamura (JCG), Yuto Yoshizumi (GSFS, UT), Tomohiro Inoue, Kenji Kouno (ISS,UT), Takeshi Iinuma (JAMSTEC) US2024-39 |
In the Seafloor Geodetic Observation Array (SGO-A) operated by the Japan Coast Guard using the GNSS-A, distortion of aco... [more] | US2024-39 pp.27-31 |
| US | 2024-08-27 15:45 |
Tokyo | Tokyo Tech Front, Tokyo Tech (Ookayama Campus) (Tokyo) | Observation of long-range propagating underwater acoustic waves using cabled ocean bottom seismometers Ryoichi Iwase (JAMSTEC) US2024-40 |
In addition to seismic waves such as P waves and S waves that propagate on the seafloor or under the seafloor, it is kno... [more] | US2024-40 pp.32-35 |
| AP | 2024-03-15 14:00 |
Fukui | UNIVERSITY OF FUKUI (Fukui, Online) (Primary: On-site, Secondary: Online) |
Eigenvalue Analysis of Radio Propagation Utilizing Hollow Cylindrical Concrete Structures in Sea Water Nozomu Ishii, Naoki Kuzuu (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Qiaowei Yuan (Tohoku Inst. Tech.), Qiang Chen (Tohoku Univ.), Hiroshi Yoshida (JAMSTEC) AP2023-217 |
This paper reports the results of an eigenmode analysis of radio propagation using a hollow cylindrical concrete structu... [more] | AP2023-217 pp.91-96 |
| AP | 2024-03-15 14:25 |
Fukui | UNIVERSITY OF FUKUI (Fukui, Online) (Primary: On-site, Secondary: Online) |
Distribution of Electromagnetic Fields of Radio Propagation Utilizing Hollow Cylindrical Concrete Qiaowei Yuan, Norihito Yamato (Tohoku Inst. Tech), Nozomu Ishii (Niigata Univ.), Masaharu Takahashi (Chiba Univ.), Qiang Chen (Tohoku Univ.), Hiroshi Yoshida (JAMSTEC) AP2023-218 |
[more] | AP2023-218 pp.97-101 |
| AP | 2024-03-15 15:25 |
Fukui | UNIVERSITY OF FUKUI (Fukui, Online) (Primary: On-site, Secondary: Online) |
Frequency Analysis of Radio Propagation Utilizing Hollow Cylindrical Concrete Structures in Sea Water Kaito Ishikawa, Masaharu Takahashi (Chiba Univ.), Nozomu Ishii (Niigata Univ.), Qiaowei Yuan (Tohoku Inst. Tech.), Qiang Chen (Tohoku Univ.), Hiroshi Yoshida (JAMSTEC) AP2023-220 |
As one of the applications of electromagnetic waves in the ocean, we conducted a basic study of a system for communicati... [more] | AP2023-220 pp.105-108 |
| RCS, SR, SRW (Joint) |
2024-03-13 13:00 |
Tokyo | The University of Tokyo (Hongo Campus), and online (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Effects of the Doppler shift on synchronization in underwater acoustic communication Mitsuyasu Deguchi, Yukihiro Kida, Yoshitaka Watanabe, Takuya Shimura (JAMSTEC) RCS2023-259 |
In underwater acoustic communication, the Doppler shifts can degrade demodulation performance more severely than that in... [more] | RCS2023-259 pp.30-35 |
| RCS, SR, SRW (Joint) |
2024-03-13 13:25 |
Tokyo | The University of Tokyo (Hongo Campus), and online (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Underwater Acoustic Communication Between Autonomous Surface Vehicle and Autonomous Underwater Vehicle in Shallow Sea Channel
-- Experimental Demonstration of the Mobile Communication Between High Speed Vehicles Using a Multi-channel Decision Feedback Equalizer Approach -- Yukihiro Kida, Mitsuyasu Deguchi, Takuya Shimura (JAMSTEC), Narihiro Iwama (ATLA) RCS2023-260 |
Underwater acoustic communication is known for one of the most severe doubly selective propagation environment with sign... [more] | RCS2023-260 pp.36-41 |
| UWT (2nd) |
2024-01-29 15:15 |
Tokyo | Tokai University Shinagawa Campus (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Influence of electric double layer on low-frequency complex permittivity measurements in sea Hiroshi Yoshida (JAMSTEC) |
[more] | |
| UWT (2nd) |
2024-01-29 16:05 |
Tokyo | Tokai University Shinagawa Campus (Tokyo, Online) (Primary: On-site, Secondary: Online) |
Measurement of Lateral Waves Along Seabed Using Spherical-Electrode Half Sheath Antennas Takashi Kawamura, Takuma Matsushita, Yukio Kaneko, Nobuaki Kawai, Yasuhiro Matsui, Akihiro Horii (Sony Group), Hiroshi Yoshida (JAMSTEC) |
[more] | |
| UWT (2nd) |
2023-11-27 15:50 |
Shiga | Ritsumeikan University Biwako-Kusatsu Campus (BKC) (Shiga) | [Invited Lecture]
utilization of Zadoff-Chu signals on underwater acoustic communication
-- improving efficiecy of MIMO communication -- Mitsuyasu Deguchi, Yukihiro Kida, Yoshitaka Watanabe, Takuya Shimura (JAMSTEC) |
[more] | |
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