Papers - OKAMOTO Eiji

Comparative study of channel coding methods for performance improvement in next-generation optical satellite data relay system Invited

IEICE Tech. Rep.   123 ( 171 )   SAT2023-42, 41 - 45   2023.08

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Authorship：Lead author,　Corresponding author   Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230831zCWS/

Demonstration of chaos-based radio encryption modulation scheme through wired transmission experiments Reviewed

K. Tomita, M. Okumura, E. Okamoto

IEICE Transactions on Communications   E106-B ( 8 )   686 - 695   2023.08

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Institute of Electronics, Information and Communication Engineers  

DOI： 10.1587/transcom.2022EBT0005

Other Link： https://doi.org/10.1587/transcom.2022EBT0005

Improvement of key generation efficiency of free-space optical physical layer cryptography using polar code

IEICE Tech. Rep.   123 ( 105 )   SAT2023-12, 13 - 17   2023.07

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230712kCvc/

A Study on Complexity Reduction of Bit Assignment and Performance Improvement by Channel Code Concatenation in Chaos Modulation

IEICE Tech. Rep.   123 ( 108 )   RCS2023-86, 33 - 38   2023.07

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230713fCVO/

A study on the application of Raptor codes in a relay transmission model for large-capacity data utilizing V2X

IEICE Tech. Rep.   123 ( 108 )   CS2023-81, 13 - 18   2023.07

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230712ICVg/

A Study of High Efficiency of Information Reconciliation in Continuous Quantum Key Distribution with Fixed Bit Polar Codes

IEICE Tech. Rep.   123 ( 105 )   SAT2023-11, 7 - 12   2023.07

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230712jCvC/

Advantages and Challenges of Applying Nonlinear Optimization Techniques in 6G Systems Invited

IEICE ESS Fundamentals Review   17 ( 1 )   26 - 35   2023.07

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：IEICE  

DOI： 10.1587/essfr.17.1_26

Other Link： https://doi.org/10.1587/essfr.17.1_26

A Study on performance improvement of uplink multi-user radio-encypted MIMO transmission scheme using accurate probability calculation

IEICE Tech. Rep.   123 ( 76 )   RCS2023-32, 25 - 30   2023.06

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/202306144Cu5/

A Study on Accurate Beam Tracking Method Using Vehicle Location Information in 5G Millimeter Wave Vehicle Communication System

IEICE Tech. Rep.   123 ( 76 )   RCS2023-41, 75 - 80   2023.06

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230614tCu6/

Fast secret key-sharing method based on channel information and chaos randomization Reviewed

T. Abe, K. Asano, K. Kato, E. Okamoto, T. Yamamoto

IEICE Communications Express   12 ( 5 )   188 - 193   2023.05

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.1587/comex.2023XBL0007

Other Link： https://www.jstage.jst.go.jp/article/comex/11/5/11_2022XBL0007/_article

Polar-coded transmission over 7.8-km terrestrial free-space optical links Reviewed International journal

S. Fujita, E. Okamoto, H. Takenaka, H. Endo, M. Fujiwara, M. Kitamura, R. Shimizu, M. Sasaki, and M. Toyoshima

Photonics   10 ( 4: 462 )   1 - 14   2023.04

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/photonics10040462

Other Link： https://www.mdpi.com/2304-6732/10/4/462

High-quality secure wireless transmission scheme using polar codes and radio-wave encrypted modulation Reviewed

K. Asano, M. Okumura, T. Abe, E. Okamoto, T. Yamamoto

IEICE Transactions on Communications   E106-B ( 4 )   374 - 383   2023.04

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：The Institute of Electronics, Information and Communication Engineers  

DOI： 10.1587/transcom.2022EBP3098

Other Link： https://search.ieice.org/bin/summary.php?id=e106-b_4_374&category=B&year=2023&lang=E&abst=

Study on 6G system modeling and performance improvement through nonlinear signal processing Invited

IEICE General Conf.   1 - 4   2023.03

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

A Study on Reducing Transmission Waiting Time Using Non-Orthogonal Multiple Access in UAV Uplink Communication System

IEICE Tech. Rep.   122 ( 426 )   ITS2022-80, 6 - 11   2023.03

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230313NCSG/

A Study on Coverage Extension Using Cooperative Relay Transmission in Uplink V2N Communication

IEICE Tech. Rep.   122 ( 426 )   ITS2022-81, 12 - 17   2023.03

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Authorship：Corresponding author   Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230313LCSH/

Adaptive transmission suspension of V2N uplink communication based on in-advanced quality of service notification Reviewed International journal

R. Hasegawa, E. Okamoto

Vehicles   5 ( 1 )   203 - 222   2023.02

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)  

DOI： 10.3390/vehicles5010012

Other Link： https://www.mdpi.com/2624-8921/5/1/12

A Study on Bit Error Rate Improvement of Chaos Modulation By Bit Assignment Using Nonlinear Optimization Algorithm

IEICE Tech. Rep.   122 ( 357 )   RCS2022-209, 7 - 12   2023.01

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20230124VCpX/

A Robust Indoor Localization Method for NLOS Environments Utilizing Sensor Subsets Reviewed International journal

K Ishida, E. Okamoto, H.-B. Li

IEEE Open Journal of Signal Processing   3   450 - 463   2022.12

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Authorship：Corresponding author   Language：English   Publishing type：Research paper (scientific journal)   Publisher：IEEE  

DOI： 10.1109/OJSP.2023.3235245

Other Link： https://ieeexplore.ieee.org/document/10011532

A Study on Performance Improvement of Uplink Multi-User Chaos MIMO Transmission Scheme

IEICE Tech. Rep.   122 ( 252 )   RCS2022-157, 13 - 17   2022.11

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20221115wCnC/

A Study on Performance Improvement of Chaos Modulation-Concatenated Polar Codes with Multi-purpose Frozen Bits by Turbo Decoding Invited

IEICE Tech. Rep.   122 ( 252 )   RCS2022-158, 19 - 24   2022.11

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Language：Japanese   Publishing type：Research paper (conference, symposium, etc.)  

Other Link： https://ken.ieice.org/ken/paper/20221115oCn1/