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All Technical Committee Conferences (Searched in: All Years)
| Committee | Date Time | Place | Paper Title / Authors | Abstract | Paper # | |
| RCS, SAT (Joint) |
2023-08-31 16:20 |
Nagano | Naganoken Nokyo Building, and online (Primary: On-site, Secondary: Online) |
[Encouragement Talk]
Comparative study of channel coding methods for performance improvement in next-generation optical satellite data relay system Eiji Okamoto, Yuma Yamashita (NITech), Yohei Satoh, Mitsuhiro Nakadai, Takamasa Itahashi, Shiro Yamakawa (JAXA)  SAT2023-42 |
Optical satellite data relay systems which send high-capacity data observed by low-orbit user satellites to geostationar... [more] | SAT2023-42 pp.41-45 |
| SeMI, RCS, RCC, NS, SR (Joint) |
2023-07-12 10:50 |
Osaka | Osaka University Nakanoshima Center + Online (Primary: On-site, Secondary: Online) |
A study on the application of Raptor codes in a relay transmission model for large-capacity data utilizing V2X Haruki Shimizu (NITech), Keitarou Kondou, Yozo Shoji (NICT), Eiji Okamoto (NITech) RCS2023-81 |
High-frequency radio waves, such as millimeter waves, which enable high-speed, large-capacity communications between rad... [more] | RCS2023-81 pp.13-18 |
| AP, SANE, SAT (Joint) |
2023-07-12 14:20 |
Hokkaido | The Citizen Activity Center (Primary: On-site, Secondary: Online) |
Construction of high-efficient information reconciliation method using fixed bit polar codes for continuous-variable quantum key distribution Kensuke Yamaura (Nitech), Hiroyuki Endo (NICT), Eiji Okamoto (Nitech), Morio Toyoshima, Mikio Fujiwara, Masahide Sasaki (NICT) SAT2023-11 |
Continuous Variable Quantum Key Distribution (CV-QKD) is being studied for various applications, including satellite-to-... [more] | SAT2023-11 pp.7-12 |
| AP, SANE, SAT (Joint) |
2023-07-12 14:40 |
Hokkaido | The Citizen Activity Center (Primary: On-site, Secondary: Online) |
Improvement of key generation efficiency of free-space optical physical layer cryptography using polar code Ryuto Terada (Nitech), Hiroyuki Endo (NICT), Kensuke Yamaura, Eiji Okamoto (Nitech), Mitsuo Kitamura (NICT), Ryosuke Shimizu (UEC), Morio Toyoshima, Mikio Hujiwara, Masahide Sasaki (NICT) SAT2023-12 |
Quantum key distribution is known as a secure key sharing technology against all physically possible attacks. However, t... [more] | SAT2023-12 pp.13-18 |
| SeMI, RCS, RCC, NS, SR (Joint) |
2023-07-13 09:25 |
Osaka | Osaka University Nakanoshima Center + Online (Primary: On-site, Secondary: Online) |
A Study on Complexity Reduction of Bit Assignment and Performance Improvement by Channel Code Concatenation in Chaos Modulation Ryo Tozawa, Yuuki Mori, Seiya Yamashita, Eiji Okamoto (NITech), Tetsuya Yamamoto (Panasonic) RCS2023-86 |
In recent years, with the rapid increase of Internet of Things (IoT) devices in industries, healthcare, and other fields... [more] | RCS2023-86 pp.33-38 |
| RCS | 2023-06-14 10:10 |
Hokkaido | Hokkaido University, and online (Primary: On-site, Secondary: Online) |
A Study on performance improvement of uplink multi user radio encypted MIMO transmission scheme using accurate probability calculation Seiya Yamashita, Yuki Mori, Ryo Tozawa, Eiji Okamoto (NITech), Tetsuya Yamamoto (Panasonic) RCS2023-32 |
Multi-user MIMO (MU-MIMO) is known as an effective multiple access method, and we have previously proposed a multi-user ... [more] | RCS2023-32 pp.25-30 |
| RCS | 2023-06-14 15:35 |
Hokkaido | Hokkaido University, and online (Primary: On-site, Secondary: Online) |
A Study on Accurate Beam Tracking Method Using Vehicle Location Information in 5G Millimeter Wave Vehicle Communication System Takumi Eboshita, Eiji Okamoto (NIT) RCS2023-41 |
Millimeter-wave band having a wide bandwidth is being used in 5G, and is expected to be an important means of communicat... [more] | RCS2023-41 pp.75-80 |
| ITS, IEE-ITS | 2023-03-13 15:05 |
Chiba | Nihon Univ., Funabashi Campus (Primary: On-site, Secondary: Online) |
A Study on Reducing Transmission Waiting Time Using Non-Orthogonal Multiple Access in UAV Uplink Communication System Daiki Ikeda, Eiji Okamoto (NITech) ITS2022-80 |
Recently, a multi-stage relay transmission system using unmanned aerial vehicles (UAV) has been proposed to efficiently ... [more] | ITS2022-80 pp.6-11 |
| ITS, IEE-ITS | 2023-03-13 15:30 |
Chiba | Nihon Univ., Funabashi Campus (Primary: On-site, Secondary: Online) |
A Study on Coverage Extension Using Cooperative Relay Transmission in Uplink V2N Communication Akihiro Sonoda, Eiji Okamoto (NITech) ITS2022-81 |
Recently, cooperative relay transmission has been considered as a technology to extend the coverage of vehicular to netw... [more] | ITS2022-81 pp.12-17 |
| IT, RCS, SIP | 2023-01-24 10:25 |
Gunma | Maebashi Terrsa (Primary: On-site, Secondary: Online) |
A Study on Bit Error Rate Improvement of Chaos Modulation By Bit Assignment Using Nonlinear Optimization Algorithm Ryo Tozawa, Keisuke Asano, Takumi Abe, Kenta Kato, Eiji Okamoto (NIT) IT2022-30 SIP2022-81 RCS2022-209 |
In recent years, the number of Internet of things (IoT) devices has increased and they are used in industrial and medica... [more] | IT2022-30 SIP2022-81 RCS2022-209 pp.7-12 |
| RCS, AP, UWT (Joint) |
2022-11-15 10:20 |
Fukuoka | Kyushu University, and Online (Primary: On-site, Secondary: Online) |
A Study on Performance Improvement of Uplink Multi-User Chaos MIMO Transmission Scheme Kenta Kato, Keisuke Asano, Takumi Abe, Yuki Mori, Eiji Okamoto (NIT), Tetsuya Yamamoto (Panasonic) RCS2022-157 |
Internet of things (IoT) terminals have spread rapidly in recent years, and multi-user multiple-input multiple-output (M... [more] | RCS2022-157 pp.13-18 |
| RCS, AP, UWT (Joint) |
2022-11-15 11:00 |
Fukuoka | Kyushu University, and Online (Primary: On-site, Secondary: Online) |
[Encouragement Talk]
A Study on Performance Improvement of Chaos Modulation-Concatenated Polar Codes with Multi-purpose Frozen Bits by Turbo Decoding Keisuke Asano, Takumi Abe, Kenta Kato, Yuki Mori, Eiji Okamoto (NIT), Tetsuya Yamamoto (Panasonic) RCS2022-158 |
The number of Internet of things (IoT) has been rapidly increasing and is expected to revolutionize industries and peopl... [more] | RCS2022-158 pp.19-24 |
| RCS | 2022-10-28 13:50 |
Ehime | Ehime University, and online (Primary: On-site, Secondary: Online) |
[Invited Lecture]
Novel wireless communication system realized by mobile terminal collaboration
-- Recent results and application to uplink transmission -- Hidekazu Murata, Yuta Ida (Yamaguchi Univ.), Kazuki Maruta (Tokyo Univ. of Science), Yutaka Jitsumatsu (Tokyo Tech), Osamu Muta (Kyushu Univ.), Hiraku Okada (Nagoya Univ.), Eiji Okamoto (NITech), Yukitoshi Sanada (Keio Univ.), Toshihiko Nishimura (Hakkaido Univ.), Satoshi Denno (Okayama Univ.) RCS2022-149 |
If nearby wireless terminals cooperate using high-frequency bands, a large number of antennas can be used at the termina... [more] | RCS2022-149 p.107 |
| AP, SANE, SAT (Joint) |
2022-07-29 14:30 |
Hokkaido | Asahikawa Taisetsu Crystal Hall (Primary: On-site, Secondary: Online) |
Study on efficient channel coding method for next-generation optical satellite data relay system Eiji Okamoto, Yuma Yamashita (NITech), Yohei Satoh, Mitsuhiro Nakadai, Takamasa Itahashi, Shiro Yamakawa (JAXA) SAT2022-27 |
High-capacity satellite communications are continuously demanded, and one of the challenges is to realize a high-capacit... [more] | SAT2022-27 pp.57-62 |
| NS, SR, RCS, SeMI, RCC (Joint) |
2022-07-15 11:05 |
Ishikawa | The Kanazawa Theatre + Online (Primary: On-site, Secondary: Online) |
Study on Extended Ranging and Improved Accuracy of Indoor Positioning Using 5G D2D Communications Takeshi Yamamoto, Eiji Okamoto (NITech) SeMI2022-40 |
In indoor locations where the global navigation satellite system (GNSS) cannot be used, alternative positioning methods ... [more] | SeMI2022-40 pp.87-92 |
| RCS | 2022-06-16 10:35 |
Okinawa | University of the Ryukyus, Senbaru Campus and online (Primary: On-site, Secondary: Online) |
Performance Evaluation of Radio-Wave Encrypted Modulation Method by Wireless Transmission Experiments Yuki Mori, Keisuke Asano, Eiji Okamoto (NITech) RCS2022-44 |
In recent years, it has become important to enhance the confidentiality of communications, and we have proposed a chaos ... [more] | RCS2022-44 pp.120-125 |
| RCS | 2022-06-16 10:45 |
Okinawa | University of the Ryukyus, Senbaru Campus and online (Primary: On-site, Secondary: Online) |
Study on performance improvement of early hybrid automatic repeat request method on 5G URLLC using adaptive modulation and coding Kyosuke Sano, Akira Hasegawa, Eiji Okamoto (NITech), Manabu Mikami, Hitoshi Yoshino (SoftBank) RCS2022-45 |
Ultra-reliable and low latency communications (URLLC) is one of the key scenarios for the 5th generation mobile communic... [more] | RCS2022-45 pp.126-131 |
| RCS | 2022-06-16 10:55 |
Okinawa | University of the Ryukyus, Senbaru Campus and online (Primary: On-site, Secondary: Online) |
Study on Highly Accurate Beam Tracking Method Using Onboard Spherical Array Antenna for 5G Millimeter Wave Vehicle Communication Systems Taisei Kurahashi, Ryo Kato, Eiji Okamoto (NITech) RCS2022-46 |
In vehicle-to-network (V2N) communications in the fifth-generation mobile communication system (5G), the use of millimet... [more] | RCS2022-46 pp.132-137 |
| RCS | 2022-06-17 15:20 |
Okinawa | University of the Ryukyus, Senbaru Campus and online (Primary: On-site, Secondary: Online) |
A Study on Secret Key Sharing and Randomizing Method Based on Channel State Information and Chaos Theory Takumi Abe, Keisuke Asano, Kenta Kato, Eiji Okamoto (Nagoya Institute of Technology), Tetsuya Yamamoto (Panasonic) RCS2022-66 |
In recent years, with the commercialization of the fifth generation mobile communications system (5G), there has been a ... [more] | RCS2022-66 pp.247-252 |
| RCC, WBS, SAT, MICT | 2022-05-26 15:25 |
Online | Online | A Study on Performance Improvement in Mid-to-High Latitude Regions Using MIMO Transmission Method with LEO satellites and QZS Takeshi Shimizu, Mamoru Okumura, Eiji Okamoto (NITech), Amane Miura, Hiroyuki Tsuji (NICT) WBS2022-10 RCC2022-10 SAT2022-10 MICT2022-10 |
In recent years, the demand for satellite communications has been increasing, and further capacity enhancement has been ... [more] | WBS2022-10 RCC2022-10 SAT2022-10 MICT2022-10 pp.46-51 |
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