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HOME Researchers Zhao Ou

Zhao Ou

Ph.D.

Position

Researcher

Post

Wireless Systems Laboratory

Research Project

Wireless Emulator Device-to-Device (D2D)

Publications

Jan 2026 Fucheng Miao, Osamu Takyu, Lin Shan, Yue Yin, Ou Zhao, Tomoaki Ohtsuki, and Guan Gui, "MuECNet: A Lightweight Multiuser Enhanced Convolutional Architecture for Robust CSI-Based Human Activity Recognition in Real-World IoT Environments," IEEE Internet Things J., vol. 13, no. 6, pp. 12209–12219, Mar. 2026, doi: 10.1109/JIOT.2026.3654610.
[ DOI ]
Nov 2025 Ou Zhao, Lin Shan, Huan-Bang Li, Hirokazu Sawada, Daisuke Matsuo, Yasushi Fuwa, and Takeshi Matsumura, "Geographic Knowledge-Driven Transfer Learning for Enhanced Received Signal Strength Prediction," IEEE Trans. Cogn. Commun. Netw., vol. 12, pp. 4448–4462, 2026, doi: 10.1109/TCCN.2025.3633744.
[ DOI ]
Nov 2023 Wei-Shun Liao, Ou Zhao, Keren Li, Hikaru Kawasaki, and Takeshi Matsumura, "Implementation of In-Band Full-Duplex Using Software Defined Radio with Adaptive Filter-Based Self-Interference Cancellation," Future Internet, vol. 15, no. 11, p. 360, Nov. 2023, doi: 10.3390/fi15110360.
[ DOI ]
Aug 2022 Ou Zhao, Wei-Shun Liao, Keren Li, Takeshi Matsumura, Fumihide Kojima, and Hiroshi Harada, "A Lazy Learning-Based Self-Interference Cancellation Approach for In-Band Full-Duplex Wireless Communication Systems," Wireless Communications and Mobile Computing, vol. 2022, no. 1, p. 1154325, 2022, doi: https://doi.org/10.1155/2022/1154325.
[ DOI ]
Jan 2022 Lin Shan, Ou Zhao, Katsuhiro Temma, Fumihide Kojima, Fumiyuki Adachi, and Takeshi Matsumura, "Machine Learning-Aided Energy Efficiency Strategy for Multiuser Cooperative Networks," Wireless Communications and Mobile Computing, vol. 2022, 2022, doi: 10.1155/2022/3951376.
[ DOI ]
Jan 2020 Wei-Shun Liao, Ou Zhao, Golam Kibria Mirza, Gabriel Porto Villardi, Kentaro Ishizu, and Fumiyuki Kojima, "Machine Learning-Based Signal Detection for CoMP Downlink in Ultra-Dense Small Cell Networks," IEEE Access, vol. 8, pp. 17454–17463, 2020, doi: 10.1109/ACCESS.2020.2965631.
[ DOI ]
Dec 2019 Ou Zhao, Wei-Shun Liao, Kentaro Ishizu, and Fumihide Kojima, "Dynamic and Non-Centric Networking Approach Using Virtual Gateway Platforms for Low Power Wide Area Systems," IEEE Access, vol. 7, pp. 186078–186090, 2019, doi: 10.1109/ACCESS.2019.2961152.
[ DOI ]
Jul 2019 Lin Shan, Ou Zhao, Katsuhiro Temma, Kentaro Hattori, Fumihide Kojima, and Fumiyuki Adachi, "Evaluation of Machine Learnable Bandwidth Allocation Strategy for User Cooperative Traffic Forwarding," IEEE Access, vol. 7, pp. 85213–85225, 2019, doi: 10.1109/ACCESS.2019.2925431.
[ DOI ]
Feb 2019 Ou Zhao, Lin Shan, Wei-Shun Liao, Golam Kibria Mirza, Huan-Bang Li, Kentaro Ishizu, Fumihide Kojima, "A Device-Centric Clustering Approach for Large-Scale Distributed Antenna Systems Using User Cooperation," IEICE Trans. Commun., vol. E102.B, no. 2, pp. 359–372, Feb. 2019, doi: 10.1587/transcom.2017EBP3452.
[ DOI ]
Jan 2019 Wei-Shun Liao, Golam Kibria Mirza, Gabriel Porto Villardi, Ou Zhao, Kentaro Ishizu, and Fumiyuki Kojima, "Coordinated Multi-Point Downlink Transmission for Dense Small Cell Networks," IEEE Trans. Veh. Technol., vol. 68, no. 1, pp. 431–441, Jan. 2019, doi: 10.1109/TVT.2018.2880788.
[ DOI ]

Career

Apr 2012 - Mar 2014 M. Sc in Wireless Communication, Communications and Computer Engineering Department, Graduate School of Informatics, Kyoto University, Japan. M. Sc in Wireless Communication

Summary: The Wireless Communication programme focuses on the physical and lower layers of wireless communication. The programme features both theoretical and practical learning, as well as plenty of group assignments and presentations. During the final semester, I was involved in active research under the supervision of Associate Prof. Hidekazu MURATA for my Masters thesis work on sum rate analysis of multi-user multi-input multi-output (Μ-MIMO) in centralized and distributed antenna systems under the effects of spatial correlation.

Apr 2014 - Sep 2016 Ph. D in Informatics, Communications and Computer Engineering Department, Graduate School of Informatics, Kyoto University, Japan.

Summary: My doctoral research focused on the dynamic clustering (over transmit and receive antennas, carriers, power) problem in large-scale MU-MIMO distributed antenna systems. To solve the dynamic clustering optimization problem and reduce the precoding complexity in the considered systems, I proposed a simple and efficient clustering scheme based on multiple orthogonal carriers with maximizing the system sum rate. For the clustering problem in the systems, I have considered several design objectives and proposed other efficient and low-complexity clustering techniques. My doctoral research focused also on the user collaboration using the WLAN or milli-meter waves for future wireless communication systems.

Oct 2016 - Apr 2025 Information and Communications Technology, Yokosuka, Japan, Researcher.

Summary: Worked on wireless communication systems including cellular and IoT networks, artificial intelligence, and big data analysis. Responsibilities include: providing technical solutions to the clients; expert level fault handling; participate in projects and take charge from operation side; devising new solution and implement them to adapt new requirements; implementing access control and security process as part of network infrastructure.

May 2025 - Mar 2026 Organization for IT Initiatives, Shinshu University, Japan, Specially Appointed Associate Professor.

Summary: Worked on wireless communication systems, resilient IoT networks, AI, and big data-driven modeling in academic projects. Responsibilities include: proposing research themes and technical strategies; leading development of radio propagation prediction using transfer learning and geographical knowledge, achieving high-accuracy RSSI estimation and IEEE publication; proposing federated transfer learning with data security considerations, leading to grants and patents; driving DX projects from problem formulation to system design, field trials, and implementation for applications such as mobility tracking and disaster-resilient sensing; contributing to 3D point cloud and Gaussian Splatting-based digital infrastructure and simulation; publishing research and promoting industry-academia collaboration.

Apr 2026 -  Information and Communications Technology, Yokosuka, Japan, Researcher.

Summary: Worked on wireless communication systems, machine learning (ML)-driven optimization, semantic communication, and 3D Gaussian Splatting (3DGS)-based modeling in practical environments. Responsibilities include: delivering client-focused solutions using ML-based radio propagation prediction and data-driven optimization; developing ML-based semantic communication techniques to improve transmission efficiency and context-aware performance; handling complex network faults with expert analysis; supporting project deployment and continuous system improvement; designing solutions integrating ML, semantic communication, and 3D spatial modeling; and ensuring network security and access control.

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