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Eiji Okamoto
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Publications
- 2023
- [j73]Keisuke Asano, Mamoru Okumura, Takumi Abe, Eiji Okamoto, Tetsuya Yamamoto:
High-Quality Secure Wireless Transmission Scheme Using Polar Codes and Radio-Wave Encrypted Modulation. IEICE Trans. Commun. 106(4): 374-383 (2023) - [j72]Kenya Tomita, Mamoru Okumura, Eiji Okamoto:
Demonstration of Chaos-Based Radio Encryption Modulation Scheme through Wired Transmission Experiments. IEICE Trans. Commun. 106(8): 686-695 (2023) - [j70]Keisuke Asano, Takumi Abe, Kenta Kato, Eiji Okamoto, Tetsuya Yamamoto:
High-Quality and Low-Complexity Polar-Coded Radio-Wave Encrypted Modulation Utilizing Multipurpose Frozen Bits. IEICE Trans. Commun. 106(10): 987-996 (2023) - 2022
- [j69]Kaga Tomoki, Mamoru Okumura, Eiji Okamoto, Tetsuya Yamamoto:
Multi-Level Encrypted Transmission Scheme Using Hybrid Chaos and Linear Modulation. IEICE Trans. Commun. 105-B(5): 638-647 (2022) - [j68]Mamoru Okumura, Keisuke Asano, Takumi Abe, Eiji Okamoto, Tetsuya Yamamoto:
Performance Improvement of Radio-Wave Encrypted MIMO Communications Using Average LLR Clipping. IEICE Trans. Commun. 105-B(8): 931-943 (2022) - 2021
- [c150]Mamoru Okumura, Kaga Tomoki, Eiji Okamoto, Tetsuya Yamamoto:
Chaos-Based Interleave Division Multiple Access Scheme with Physical Layer Security. CCNC 2021: 1-2 - 2020
- [c149]Hayato Ishikawa, Eiji Okamoto, Hiraku Okada, Satoshi Makido:
Performance improvement of V2I uplink transmission on far vehicles using frequency scheduling-based cooperative V2V relay transmission. CCNC 2020: 1-6 - [c148]Yoshihiro Masuda, Eiji Okamoto, Tetsuya Yamamoto:
Low Complexity Decoding of Downlink Chaos NOMA Scheme with Physical Layer Security. CCNC 2020: 1-6 - [c147]Yusaku Shiomitsu, Eiji Okamoto, Manabu Mikami, Hitoshi Yoshino:
Poster: Performance analysis of early HARQ retransmission scheme in highway environments. VNC 2020: 1-2 - 2019
- [j66]Eiji Okamoto, Manabu Mikami, Hitoshi Yoshino:
Performance Comparison of Multi-User Shared Multiple Access Scheme in Uplink Channels. IEICE Trans. Commun. 102-B(8): 1458-1466 (2019) - [c146]Hayato Ishikawa, Eiji Okamoto, Shouhei Okamoto, Hiraku Okada, Satoshi Makido:
Performance Analysis of Uplink V2I Cooperative Transmission Scheme in Practical Road Environments. ICOIN 2019: 98-102 - [c145]Ryo Hasegawa, Eiji Okamoto, Hiroyuki Tsuji, Amane Miura:
Performance Analysis of a Terrestrial/UAV Integrated Mobile Communications System Using Code Division Multiplexing in Natural Disasters. ICOIN 2019: 103-107 - [c144]Yoshihiro Masuda, Eiji Okamoto, Keita Ito, Tetsuya Yamamoto:
An Uplink Non-Orthogonal Multiple Access Scheme Having Physical Layer Security Based on Chaos Modulation. ICOIN 2019: 136-140 - [c143]Keita Ito, Yoshihiro Masuda, Eiji Okamoto:
A Chaos MIMO-Based Polar Concatenation Code for Secure Channel Coding. ICOIN 2019: 262-267 - [c142]Yusaku Shiomitsu, Eiji Okamoto, Manabu Mikami, Hitoshi Yoshino:
Poster: Effective frame configuration of 5G URLLC using open-loop HARQ for autonomous driving. VNC 2019: 1-2 - 2018
- [j65]Naoto Horiike, Eiji Okamoto, Tetsuya Yamamoto:
A downlink non-orthogonal multiple access scheme having physical layer security. EURASIP J. Wirel. Commun. Netw. 2018: 205 (2018) - [c141]Kengo Sasaki, Eiji Okamoto:
A Study on Indoor Dimming Method Utilizing Outside Light for Power Saving. APSIPA 2018: 1847-1852 - [c140]Naoto Horiike, Hiroki Kitagawa, Eiji Okamoto, Tetsuya Yamamoto:
Chaos MIMO-based downlink non-orthogonal multiple access scheme with physical layer security. CCNC 2018: 1-7 - [c139]Eiji Okamoto, Naoto Horiike, Tetsuya Yamamoto:
Large-Scale Grant-Free Sparse Chaos Code Multiple Access Scheme for 5G IoT. VTC Fall 2018: 1-5 - 2017
- [j60]Hiroki Kitagawa, Eiji Okamoto:
Performance improvement of non-orthogonal multiple access scheme using code division multiplexing. Int. J. Distributed Sens. Networks 13(11) (2017) - [c138]Naoto Horiike, Eiji Okamoto, Tetsuya Yamamoto:
Performance improvement of multi-user chaos MIMO transmission scheme using dirty paper coding. APCC 2017: 1-6 - [c136]Naoto Horiike, Eiji Okamoto, Tetsuya Yamamoto:
Performance improvement of chaos MIMO transmission scheme by LDPC code concatenation using symbol MAP detection and STBC. ICOIN 2017: 200-205 - [c135]Hiroki Kitagawa, Eiji Okamoto:
Performance improvement of non-orthogonal multiple access scheme using code division multiplexing. ICOIN 2017: 327-331 - [c134]Tomohiro Akiyoshi, Eiji Okamoto, Hiroyuki Tsuji, Amane Miura:
Performance improvement of satellite/terrestrial integrated mobile communication system using unmanned aerial vehicle cooperative communications. ICOIN 2017: 417-422 - [c133]Eiji Okamoto, Hiraku Okada, Yoshinao Ishii, Satoshi Makido:
Performance Improvement of Low-Latency V2I Uplink Using Superposed Cooperative V2V Transmission. VTC Fall 2017: 1-5 - [c132]Eiji Okamoto, Naoto Horiike, Tetsuya Yamamoto:
Sparse chaos code multiple access scheme achieving larger capacity and physical layer security. WPMC 2017: 604-610 - 2016
- [j57]Hidekazu Murata, Eiji Okamoto, Manabu Mikami, Akihiro Okazaki, Satoshi Suyama, Takamichi Inoue, Jun Mashino, Tetsuya Yamamoto, Makoto Taromaru:
Radio Access Technologies for Fifth Generation Mobile Communications System: Review of Recent Research and Developments in Japan. IEICE Trans. Commun. 99-B(8): 1638-1647 (2016) - [j56]Eiji Okamoto, Hiroyuki Tsuji:
Application of Non-Orthogonal Multiple Access Scheme for Satellite Downlink in Satellite/Terrestrial Integrated Mobile Communication System with Dual Satellites. IEICE Trans. Commun. 99-B(10): 2146-2155 (2016) - 2015
- [c127]Hidekazu Murata, Eiji Okamoto, Manabu Mikami, Akihiro Okazaki, Satoshi Suyama, Takamichi Inoue, Jun Mashino, Tetsuya Yamamoto, Makoto Taromaru:
R&D activities for 5G in IEICE technical committee on radio communication systems. APCC 2015: 250-256 - 2013
- [c107]Akihisa Tanaka, Eiji Okamoto, Hiroyuki Tsuji, Yoshiyuki Fujino:
Interference-aware weighting scheme for satellite/terrestrial integrated mobile communication system. IWCMC 2013: 1803-1808 - 2012
- [j39]Yoshitoshi Yamashita, Eiji Okamoto, Yasunori Iwanami, Yozo Shoji, Morio Toyoshima, Yoshihisa Takayama:
A Markov-Based Satellite-to-Ground Optical Channel Model and Its Effective Coding Scheme. IEICE Trans. Commun. 95-B(1): 254-262 (2012) - 2011
- [j32]Yasuhiro Fuwa, Eiji Okamoto, Yasunori Iwanami:
An Effective Downlink Resource Allocation Scheme Based on MIMO-OFDMA-CDM in Cellular System. IEICE Trans. Commun. 94-B(12): 3550-3558 (2011) - [c90]Eiji Okamoto, Hiroyuki Tsuji, Yoshiyuki Fujino:
Performance improvement of OFDMA cellular system using code division multiplexing in satellite/terrestrial integrated mobile communication system. WPMC 2011: 1-5 - [c89]Yuya Takahashi, Yasunori Iwanami, Eiji Okamoto:
A comparative study on MIMO MLSE turbo equalizer on frequency selective channels. WPMC 2011: 1-5 - 2010
- [j27]Takashi Kozawa, Yasunori Iwanami, Eiji Okamoto, Ryota Yamada, Naoki Okamoto:
An Evaluation on Throughput Performance for Type II Hybrid-ARQ Using Non-binary Rate-Compatible-Punctured LDPC Codes. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 93-A(11): 2089-2091 (2010) - [j26]Satoshi Nakanobu, Yasunori Iwanami, Eiji Okamoto:
A Comparative Study on Time Domain Sequential Equalizer with MLD and MLSE Equalizer on MIMO Frequency Selective Channels. IEICE Trans. Commun. 93-B(11): 3197-3202 (2010) - [c85]Yoshitoshi Yamashita, Eiji Okamoto, Yasunori Iwanami, Yozo Shoji, Morio Toyoshima, Yoshihisa Takayama:
An Efficient LDGM Coding Scheme for Optical Satellite-to-Ground Link Based on a New Channel Model. GLOBECOM 2010: 1-6 - [c82]Kenji Nakayama, Yasunori Iwanami, Eiji Okamoto:
MIMO MFSK receivers using FDE and MLD on quasi-static frequency selective fading channels. ISITA 2010: 31-36 - [c78]Azlan Abd Aziz, Yasunori Iwanami, Eiji Okamoto:
On the Improvement of Maximum Likelihood Detection in Multiple Relay Systems. WCNC 2010: 1-6 - 2007
- [c51]Yusuke Takahashi, Yasunori Iwanami, Eiji Okamoto:
A Comparison of Time Domain Equalizers by Block Processing in SISO Single Carrier Transmission. PIMRC 2007: 1-5 - 2006
- [c46]Eiji Okamoto, Yasunori Iwanami:
A trellis-coded chaotic modulation scheme. ICC 2006: 5010-5015 - 2002
- [j11]Eiji Okamoto, Huan-Bang Li, Tetsushi Ikegami:
A Pilot-Symbol-Assisted Fading and Frequency-Offset Compensation Method Using FFT. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. 85-A(7): 1656-1664 (2002) - [j10]Eiji Okamoto, Hiroyo Ogawa:
A block-coded modulation method for one-way multimode data transmission. IEEE Trans. Commun. 50(12): 2124-2135 (2002) - 2001
- [c25]Eiji Okamoto, Hiroyo Ogawa:
One-way multimode transmission using block-coded modulation for mobile communications. VTC Fall 2001: 136-140 - 1999
- [c15]Eiji Okamoto, Huan-Bang Li, Masato Tanaka, Hiromitsu Wakana:
A class-coded modulation method using orthogonal wavelets. WCNC 1999: 1158-1161 - 1996
- [c5]Eiji Okamoto, Huan-Bang Li, Tetsushi Ikegami:
Rayleigh fading compensation for QAM by using FFT. PIMRC 1996: 1079-1082
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