Papers - OKAMOTO Eiji

Novel wireless communication system realized by mobile terminal collaboration - Recent results and application to uplink transmission - Invited

IEICE Tech. Rep.   122 ( 235 )   RCS2022-149, 107 - 107   2022.10

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

Other Link： https://ken.ieice.org/ken/paper/20221028cCNA/

Performance Improvement of Radio-Wave Encrypted MIMO Communications Using Average LLR Clipping Reviewed

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

IEICE Transactions on Communications   E105-B ( 8 )   931 - 943   2022.08

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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.2021EBT0007

Other Link： https://search.ieice.org/bin/summary.php?id=e105-b_8_931&category=B&year=2022&lang=E&abst=

Study on efficient channel coding method for next-generation optical satellite data relay system

IEICE Tech. Rep.   122 ( 137 )   SAT2022-27, 57 - 62   2022.07

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

Other Link： https://ken.ieice.org/ken/paper/20220729fCLb/

Study on Extended Ranging and Improved Accuracy of Indoor Positioning Using 5G D2D Communications

IEICE Tech. Rep.   122 ( 108 )   SeMI2022-40, 87 - 92   2022.07

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

Other Link： https://www.ieice.org/ken/paper/20220715OCLy/

A Study on Secret Key Sharing and Randomizing Method Based on Channel State Information and Chaos Theory

IEICE Tech. Rep.   122 ( 73 )   RCS2022-66, 247 - 252   2022.06

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

Other Link： https://www.ieice.org/ken/paper/20220617RCKQ/

Study on Highly Accurate Beam Tracking Method Using Onboard Spherical Array Antenna for 5G Millimeter Wave Vehicle Communication Systems

IEICE Tech. Rep.   122 ( 73 )   RCS2022-46, 132 - 137   2022.06

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

Other Link： https://www.ieice.org/ken/paper/20220616fCKU/

Study on performance improvement of early hybrid automatic repeat request method on 5G URLLC using adaptive modulation and coding

IEICE Tech. Rep.   122 ( 73 )   RCS2022-45, 126 - 131   2022.06

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

Other Link： https://www.ieice.org/ken/paper/20220616OCKv/

Performance Evaluation of Radio-Wave Encrypted Modulation Method by Wireless Transmission Experiments

IEICE Tech. Rep.   122 ( 73 )   RCS2022-44, 120 - 125   2022.06

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

Other Link： https://www.ieice.org/ken/paper/20220616FCKW/

Construction of high-efficient information reconciliation method using polar codes and adaptive post selection for continuous-variable quantum key distribution

IEICE Tech. Rep.   122 ( 44 )   SAT2022-11, 42 - 57   2022.05

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

Other Link： https://www.ieice.org/ken/paper/20220526kCKB/

A Study on Performance Improvement in Mid-to-High Latitude Regions Using MIMO Transmission Method with LEO satellites and QZS

IEICE Tech. Rep.   122 ( 44 )   SAT2022-10, 46 - 51   2022.05

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

Other Link： https://www.ieice.org/ken/paper/20220526tC9Y/

Multi-level Encrypted Transmission Scheme Using Hybrid Chaos and Linear Modulation Reviewed

T. Kaga, M. Okumura, E. Okamoto, T. Yamamoto

IEICE Transactions on Communications   E105-B ( 5 )   638 - 647   2022.05

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：IEICE  

DOI： 10.1587/transcom.2021EBP3092

Other Link： https://search.ieice.org/bin/summary.php?id=e105-b_5_638&category=B&year=2022&lang=E&abst=

Accurate Beam Tracking Scheme for V2N Transmission Using Vehicle Logs Reviewed

R. Kato, M. Okumura, E. Okamoto

IEICE Communications Express   11 ( 5 )   189 - 194   2022.05

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：IEICE  

DOI： 10.1587/comex.2022XBL0007

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

Study on utilization of higher-frequency space communications for 6G Invited

IEICE Tech. Rep.   121 ( 391 )   RCS2021-283, 156 - 158   2022.02

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

Other Link： https://www.ieice.org/ken/paper/20220303vCj8/

A study on Complexity Reduction and Performance Improvement of Polar Coded Chaos Modulation Utilizing Multi-purpose Frozen Bits

IEICE Tech. Rep.   121 ( 329 )   RCS2021-197, 7 - 12   2022.01

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

Other Link： https://www.ieice.org/ken/paper/20220120bCHY/

A Study on Inter-Vehicle Cooperative Transmission Method Using Full-Duplex Communication

SIG Technical Reports   2021-ITS-87 ( 36 )   1 - 6   2021.11

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

Other Link： https://ipsj.ixsq.nii.ac.jp/ej/?action=pages_view_main&active_action=repository_view_main_item_detail&item_id=214296&item_no=1&page_id=13&block_id=8

A Study of Intelligent Lighting System to Complement the Estimated Location Error Using UWB in Open Plan Office

SIG Technical Reports   2021-ITS-87 ( 32 )   1 - 6   2021.11

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

Other Link： https://ipsj.ixsq.nii.ac.jp/ej/?action=pages_view_main&active_action=repository_view_main_item_detail&item_id=214292&item_no=1&page_id=13&block_id=8

Study on Performance Improvement of Radio-Wave Encrypted Modulation by LLR Clipping

IEICE Tech. Rep.   121 ( 210 )   RCS2021-137, 100 - 105   2021.10

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

Other Link： https://www.ieice.org/ken/paper/20211022gCfh/

Artificially Time-Varying Differential MIMO for Achieving Practical Physical Layer Security Reviewed International coauthorship International journal

N. Ishikawa, J. M. Hamamreh, E. Okamoto, C. Xu, L. Xiao

IEEE Open Journal of the Communications Society   ( 2 )   2180 - 2194   2021.09

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

DOI： 10.1109/OJCOMS.2021.3112486

Other Link： https://ieeexplore.ieee.org/document/9536954

Improvement of channel coding gain of chaos modulation using logistic maps Reviewed

M. Okumura, T. Kaga, E. Okamoto, T. Yamamoto

IEICE Communications Express   10 ( 9 )   744 - 750   2021.09

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Language：English   Publishing type：Research paper (scientific journal)   Publisher：IEICE  

DOI： 10.1587/comex.2021XBL0111

Other Link： https://www.jstage.jst.go.jp/article/comex/10/9/10_2021XBL0111/_article

Study on key-distillation system with adaptive polar codes in free-space quantum key distribution Invited

IEICE Tech. Rep.   121 ( 152 )   SAT2021-35, 37 - 42   2021.08

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

Other Link： https://www.ieice.org/ken/paper/20210827BCF1/