About me

TOWARD HIGH-RATE & INTELLIGENT COMMUNICATIONS

Research Interests

mmWave/sub-THz Channel Measurement & Modeling & Channel Simulator Development

✔︎ Representative First-Authorized Works 

• [mmW1] Y. Koda, R. Ouyang, N. Ohmi, and H. Harada, "Survey, taxonomy, and unification of standard mmWave channel models for WPAN, WLAN, and cellular systems in 6G," IEEE Communications Standards Magazine.

• [mmW2] Y. Koda, R. Ouyang, N. Ohmi, and H. Harada, "3GPP-compatible channel generation framework for FR2-2 indoor short-range communication," IEEE Open Journal of Antennas and Propagation.

• [mmW3] Y. Koda, N. Ohmi, H. Endo, and H. Harada, “Comprehensive 3GPP-compatible channel model for FR2-2 short-range communications for various indoor environments,” accepted at IEEE PIMRC 2024. 

• [subTHz1] Y. Koda, N. Ohmi, H. Endo, and H. Harada, "95 GHz indoor propagation measurement and statistically enhanced 3GPP channel model for sub-THz indoor short-range communications," submitted to a possible publication in IEEE. DOI: 10.36227/techrxiv.171043245.55820651/v2

• [subTHz2] Y. Koda, N. Ohmi, H. Endo, and H. Harada, “105 GHz multipath propagation measurements and path loss model for sub-THz indoor short-range communications,” in Proc. IEEE VTC2023-Fall.

• [subTHz3] Y. Koda, N. Ohmi, H. Endo, and H. Harada, “95 GHz sub-THz multi-path propagation measurement for indoor conference room desktop,” in Proc. IEEE WCNC 2024.

• [sub-THz4] Y. Koda, M. Hashimoto, H. Endo, N. Ohmi, and H. Harada, “3D double-directional 105 GHz channel sounder for ultra-wideband low sub-THz propagation measurement,” accepted at IEEE CCNC 2025 poster session.

✔︎ Works with My Supervision

• M. Hashimoto, H. Endo, Y. Koda, N. Ohmi, and H. Harada, “Double-directional 105 GHz multipath propagation measurement in lecture hall environment,”  accepted at IEEE CCNC 2025.  

(34.8% acceptance rate.)

• M. Hashimoto, Y. Koda, and H. Harada, “Improved time cluster stochastic channel model for mmWave indoor short-range communications,” accepted at IEEE PIMRC 2024. 

(Received the international conference travel grant from the Hara Research Foundation.)

• M. Maeda, Y. Koda, N. Ohmi, and H. Harada, “105 GHz indoor omnidirectional power delay profile measurement in personal office desktop environment,” accepted at IEEE VTC2024-fall.

 (Awarded by the IEEE VTS Japan)

• H. Endo, Y. Koda, and H. Harada, “A time-alignment algorithm of multiple power delay profiles measured by antenna rotations towards flexible mmWave channel measurements,” in Proc. IEEE VTC2023-spring recent results. 

(Awarded by the IEEE VTS Japan)

• M. Maeda, Y. Koda, N. Ohmi, and H. Harada, “105 GHz multipath propagation measurement and comparison with 60 GHz in office desk environment for ultra-high speed sub-THz WPAN systems,” submitted to possible publication in IEEE. 

• H. Endo, Y. Koda, N. Ohmi, and H. Harada, "Post-processing time alignment method for 60 GHz power angular delay profile without hardware synchronization," submitted to possible publication in IEEE.

✔︎ Open sub-THz Channel Simulator (Kyoto University Channel Generator)

• https://www.dco.cce.i.kyoto-u.ac.jp/en/wp/ku-gen/kucg/

✔︎ Press Release 

• Sub-THz propagation channel simulator for 6th-gen mobile communication systems R&D

Next Generation NR-based mmWave/sub-THz Wireless Communication Systems & Testbed

✔︎ Representative First-Authorized Works 

• Y. Koda, R. Okura, and H. Harada, "Toward 3GPP sidelink-based millimeter wave wireless personal area network for out-of-coverage scenarios," accepted for IEEE Internet of Things Journal.

✔︎ Works with My Supervision (or Co-authorized Works)

• R. Okura, Y. Koda, and H. Harada, “Performance evaluation of low sub-THz 5G NR sidelink for ultra-wideband short-range communication,”  accepted at IEEE VTC2024-fall. 

(Awarded by the IEEE VTS Japan)

• S. Uemori, R. Okura, Y. Koda, and H. Harada, “Highly-efficient sidelink SSB format and synchronization algorithm for common-mode signaling in 5G NR sidelink-based mmWave WPAN systems,” submitted for IEEE conference. Preprint: DOI: 10.36227/techrxiv.173014573.35377964/v1

• H. Harada, S. Mori, N. Ohmi, Y. Koda, and K. Mizutani, “Design of 3GPP-based millimeter-wave band wireless virtual community network,” in Proc. IEEE VTC2023-Spring recent results, Florence, Italy, Jun. 2023, pp. 1–5. (paper)

• [In Japanese] 大倉諒吾，香田優介，原田博司，“ミリ波5Gサイドリンク通信における見通し外端末への報知信号中継アルゴリズム” SRW 研究会，東京工業大学，2023 年 3 月. 

（短距離無線通信研究会 研究奨励賞受賞）

• [In Japanese] 上森智史，大倉諒吾，香田優介，原田博司，“ミリ波サイドリンク通信システムにおける報知チャネルの同期手法”  SRW 研究会，東京大学本郷キャンパス，2024 年 3 月. 

（短距離無線通信研究会 優秀学生賞受賞）

✔︎ Contribution to Standardization 

• "Views on Additional RAN1-led Topics: Study Proposal of Sidelink Evolution above 30 GHz for Internet of Everything," RAN 102, RP-233177

Vision/Sensing data-Assisted MmWave/sub-THz communication systems

✔︎ Representative First-Authorized Works 

• Y. Koda, “Visual data-driven millimeter wave communication systems,” Ph.D. Dissertation

• Y. Koda, K. Nakashima, K. Yamamoto, T. Nishio, and M. Morikura, “Handover management for mmWave networks with proactive performance prediction using camera images and deep reinforcement learning,” IEEE Transactions on Cognitive Communications and Networking.  (80+ citations, Awarded by Telecommunications Advancement Foundation)

• Y. Koda, J. Park, M. Bennis, K. Yamamoto, T. Nishio, M. Morikura, and K. Nakashima, “Communication-efficient multimodal split learning for mmWave received power prediction,” IEEE Communications Letters  (60+ citations, Awarded by IEEE Kansai Chapter)

• Y. Koda, K. Yamamoto, T. Nishio, and M. Morikura, “Reinforcement learning based predictive handover for pedestrian-aware mmWave networks,” in Proc. IEEE INFOCOM Workshops (50+ citations). 

• Y. Koda, M. Shinzaki, K. Yamamoto, T. Nishio, et. al., “Millimeter wave communications on overhead messenger wire: Deep reinforcement learning-based predictive beam tracking,” IEEE Transactions on Cognitive Communications and Networking.

• Y. Koda, J. Park, M. Bennis, K. Yamamoto, T. Nishio, and M. Morikura, “One pixel image and RF signal based split learning for mmWave received power prediction,” in Proc. ACM CoNEXT2019 poster. 

✔︎ Works with My Supervision 

• M. Shinzaki, Y. Koda, K. Yamamoto, et.al., “Zero-shot adaptation for mmWave beam-tracking on overhead messenger wires through robust adversarial reinforcement learning,” IEEE Transactions on Cognitive Communications and Networking.

• K. Nakashima, Y. Koda, K. Yamamoto, et. al., “Impact of input data size on received power prediction using depth images for mmWave communications,” in Proc. IEEE VTC2018-Fall. (Awarded by the IEEE VTS Japan)

• M. Shinzaki, Y. Koda, K. Yamamoto, et. al., “Deep reinforcement learning-based beam tracking from mmWave antennas installed on overhead messenger wires,” in Proc. IEEE VTC2020-fall. (Awarded by the IEEE VTS Japan)