Journal Paper

• Naoya Okubo, Keishi Tokugawa, Jin Nakazato, Suwen Ke, Yiming Chen, Gia Khanh Tran, Kei Sakaguchi, Mitsuhiro Kuchitsu, Tsuyoshi Itagaki. Field Evaluation of 5G mmWave Relays in Various Topologies: NLOS Coverage Enhancement and Tolerance against Blockage, IEEE Access, Apr. 2025.

International Conference (Reviewed)

• Gia Khanh Tran, Kei Sakaguchi. Digest of Beyond 5G White Paper on Repeater, Metasurface and RIS/IRS, ISAP 2025, IEEE AP-S, Oct. 2025.
• Suwen Ke, Kei Sakaguchi, Gia Khanh Tran. Resilient mmWave Multi-Hop Multi-User Massive Relay MIMO for 6G Networks, IEEE WCNC, Mar. 2025.

Other Publication

• Kei Sakaguchi, Gia Khanh Tran, Others. Repeater, metasurface, and RIS/IRS, Beyond 5G White Paper 6G Radio Technology Project, May 2025.

Patent

• Kei Sakaguchi, Suwen Ke. 複数のユーザ端末に対して通信を中継する方法、複数のユーザ端末に対する通信の中継を制御する装置、及びプログラム. Patent. Published. 国立大学法人東京科学大学, 日本電信電話株式会社. 2023/07/05. 特願2023-110884. 2025/01/20. 特開2025-008600. 2025.

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