Mizutani, Keiichi(Graduate School of Informatics, Department of Informatics) | Activity Database on Education and Research, Kyoto University

Mizutani, Keiichi

Graduate School of Informatics, Department of Informatics

Last Updated :2025/05/13

Basic Information

Professional Memberships

IEEE (The Institute of Electrical and Electronics Engineers)

電子情報通信学会

Academic Degree

Ph.D. in Engineering(Tokyo Institute of Technology)

Ph.D. in Engineering(Tokyo Institute of Technology)

Academic Resume (Graduate Schools)

Tokyo Institute of Technology, 大学院理工学研究科電気電子工学専攻修士課程, 修了

Tokyo Institute of Technology, 大学院理工学研究科電気電子工学専攻博士後期課程, 修了

Academic Resume (Undergraduate School/Majors)

Osaka Prefecture University, 工学部電気電子システム工学科, 卒業

High School

High School
本郷高等学校

Research History

From Apr. 2025, To Present
Nagoya University, Graduate School of Engineering Information and Communication Engineering, Professor

From Apr. 2025, To Present
Kyoto University, Faculty of Engineering School of Electrical & Electronic Engineering, 非常勤講師

From Apr. 2025, To Present
Kyoto University, Graduate School of Informatics, Researcher

From Jun. 2024, To Sep. 2024
Tottori University, Faculty of Engineering, 非常勤講師

From Oct. 2022, To Mar. 2025
Kyoto University, Graduate School of Informatics, Associate Professor

From Apr. 2021, To Sep. 2022
Kyoto University, Graduate School of Informatics, 特定准教授

From Jan. 2021, To Sep. 2022
Kyoto University, School of Platforms, Program-Specific Associate Professor

From Oct. 2014, To Dec. 2020
Kyoto University, Graduate School of Informatics, Assistant Professor

From Apr. 2016, To Sep. 2017
Kyoto Institute of Technology, 工芸科学部, 非常勤講師

From Apr. 2012, To Sep. 2014
National Institute of Information and Communications Technology (NICT), Researcher

From Apr. 2009, To Mar. 2012
Japan Society for the Promotion of Science (JSPS), Research Fellow DC1

From Jun. 2010, To Sep. 2010
Fraunhofer Institute for Telecommunications, Heinrich-Hertz-Institute (Berlin, Germany), Invited Researcher

From Oct. 2008, To Mar. 2009
経済産業省特許庁, 特許審査調査員（国際・新技術担当）

Profile

Profile
Dr. Keiichi Mizutani is an associate professor of Kyoto University. He received a B.E. degree in electric, electrical and system engineering from the Osaka Prefecture University, Japan, in 2007, and an M.E. and Ph.D. degree in electric and electrical engineering from the Tokyo Institute of Technology, Japan, in 2009 and 2012 respectively. He was an invited researcher at Fraunhofer Heinrich Hertz Institute, Germany, in 2010. From 2009 to 2012, he was a Research Fellow DC1 at Japan Society for the Promotion of Science (JSPS). From April 2012 to Sept. 2014, he was a researcher at National Institute of Information and Communications Technology (NICT). From Oct. 2014 to Dec. 2020, he was an assistant professor of Kyoto University. He currently researches the topics of physical layer technologies in White Space Communications, Dynamic Spectrum Access, and Wireless Smart Utility Networks (Wi-SUN) including OFDM, OFDMA, MIMO, and multi-hop relay network systems. Since joining in NICT, he has been involved in IEEE 802 standardization activities, namely 802.11af, 802.15.4m and 802.22b. He received the Special Technological Award and Best Paper Award from IEICE SR technical committee in 2009 and 2010 respectively, the Young Researchers Award from IEICE SRW technical committee in 2016, Certificate of Appreciation for outstanding contributions to the development of IEEE 802.15.4m-2014 from IEEE Standards Association, and Best Paper Award from WPMC in 2014, 2017, and 2020, respectively.

Last Updated :2025/05/13

Research

Research Topics, Overview of the research

Research Topics

Research Interests

Software-Defined Radio

Cognitive Radio

Network Coding

Wireless System Emulation

Acoustic Communications

Terminal location estimation

Multi-hop Relay Systems

White Spaces

MIMO / Multiple Antenna Systems

OFDM Systems

Machine Learning

Dynamic Spectrum Access

Full-Duplex

Research Areas

Manufacturing technology (mechanical, electrical/electronic, chemical engineering), Communication and network engineering

Papers

Experimental Open-Source-based Evaluation Platform for Highly Spectral-efficient 5G with Simplified UTW-OFDM
Kazuki Takeda; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, May 2025, Peer-reviewed

Stabilized Multi-Hop Route Construction Using a Modified Link Metric for Wi-SUN FAN Systems
Ryuichi Nagao; Daiki Hotta; Hiroko Masaki; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Jan. 2025, Peer-reviewed

Link-Level Evaluation of 5G NR and Potential for Spectrum-Sharing in the FR3 Band
Keiichi Mizutani; Shota Mori; Naoki Yamamoto; Hiroshi Harada
Proc. IEEE WCNC 2025, Mar. 2025, Peer-reviewed, Lead author, Corresponding author

Multi-Cell Expansion of Dynamic Full-Duplex Cellular Systems with Distributed Directional Base Station Reception Functions
Yusei Yasuba; Keita Fukushima; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2025, Jan. 2025, Peer-reviewed

Open-Source Software-based gNB Prototype for Highly Spectral-Efficient Private 5G System
Kazuki takeda; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2025, Jan. 2025, Peer-reviewed

Development and Basic Evaluation of a 5G-Based Real-Time Full-Duplex Cellular Prototype
Shota Mori; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2025, Jan. 2025, Peer-reviewed

Nonlinear Digital Self-Interference Cancellation for 5G NR-Based In-Band Full-Duplex Systems
Shota Mori; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CSCN 2024, Nov. 2024, Peer-reviewed

Dynamic Full-Duplex Cellular System for Wide Area IoT Network Backbone
Keiichi Mizutani; Kazuki Nishikori; Kyoya Teramae; Hiroto Kuriki; Takeshi Matsumura; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Aug. 2024, Peer-reviewed, Lead author, Corresponding author

Open-Source Software-Based Beyond 5G Emulator for Evaluating Dynamic Full-Duplex Cellular System
Kazuki Takeda; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VTC2024-Fall, Oct. 2024, Peer-reviewed

Inter-User Interference Cancellation Scheme for 5G-Based Dynamic Full-Duplex Cellular System
Shota Mori; Keiichi MIzutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, May 2024, Peer-reviewed

A Study on Open-Loop Transmit Power Control for Scalable Cell-Free Networks
Keita Fukushima; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2024, Jan. 2024, Peer-reviewed

Open-Source Software-Based Full-Stack Evaluation Platform of Simplified UTW-OFDM for Beyond 5G
Kazuki Takeda; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VCC 2023, Nov. 2023, Peer-reviewed

High-Precision 5G-NR Downlink Signal Detection Sensor Developed Using Software-Defined Radio
Yuto Sasaki; Shota Mori; Riichi Yokoyama; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VCC 2023, Nov. 2023, Peer-reviewed

Specification and Performance Analysis of Wi-SUN FAN
Rei Hirakawa; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Oct. 2023, Peer-reviewed
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Heterogeneous In-Band Full-Duplex for Simultaneous SUN-OFDM Transmission and SUN-FSK Reception
Yudai Morikawa; Keiichi Mizutani; Hiroshi Harada
IEEE Internet of Things Journal, Sep. 2023, Peer-reviewed

Super-large-coverage Standardized Wireless Communication System and Its Implementation in VHF Band for IoT and V2X
Kiminobu Makino; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Sep. 2023, Peer-reviewed
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Mobility Enhancement for IEEE 802.15.4 SUN-OFDM Using Channel Estimation and Viterbi Decoder with Likelihood Ratio Adjustment Methods
Yudai Morikawa; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Aug. 2023, Peer-reviewed

Design of 3GPP-based Millimeter-Wave Band Wireless Virtual Community Network
Hiroshi Harada; Shota Mori; Norichika Ohmi; Yusuke Koda; Keiichi Mizutani
2023 IEEE 97th Vehicular Technology Conference (VTC2023-Spring), Jun. 2023, Peer-reviewed

Experimental Study of Simplified UTW-OFDM Receiver Technology for Application to 5G Using Software-Defined Radio Platform
Yuu Ichikawa; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Aug. 2023, Peer-reviewed
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Heterogeneous In-Band Full-Duplex System for Simultaneous SUN-FSK Transmission and SUN-OFDM Reception
Yudai Morikawa; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Jun. 2023, Peer-reviewed
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A Digital Self-Interference Cancellation Scheme for In-Band Full-Duplex-Applied 5G System and its Software-Defined Radio Implementation
Shota Mori; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, May 2023, Peer-reviewed
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An Enhanced Channel Estimation for IEEE 802.15.4 OFDM Receiver in High-speed Mobile IoT Communication Systems
Hidetomo Ochiai; Yudai Morikawa; Keiichi Mizutani; Hiroshi Harada
IEEE Internet of Things Journal, Feb. 2023, Peer-reviewed

Software-Defined Radio-Based 5G Physical Layer Experimental Platform for Highly Mobile Environments
Shota Mori; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Jan. 2023, Peer-reviewed
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Throughput Enhancement of Dynamic Full-Duplex Cellular System by Distributing Base Station Reception Function
Keita Fukushima; Shota Mori; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Dec. 2022, Peer-reviewed

Highly Efficient Relay Routing Method for 5G Cellular V2V Communications
Daiki Kawamatsu; Keiichi Mizutani; Hiroshi Harada
Proceedings of IEEE CSCN 2022, Nov. 2022, Peer-reviewed

Performance Evaluation of 5G in VHF Band for Super-large Coverage Communication Systems
Hiroshi Harada; Shota Mori; Keiichi Mizutani
Proceedings of IEEE CSCN 2022, Nov. 2022, Peer-reviewed

Power Amplifire Linearization Using orthogonal Polynomial Indentified in Frequency Domain
Michiharu Nakamura; Keiichi Mizutani; Hiroshi Harada; Takeshi Matsumura
Proc. WPMC2022, Oct. 2022, Peer-reviewed

Video Transmission Trial by Wireless Multi-hop Network based on Wi-SUN FAN
Reo Gakumi; Hiroko Masaki; Keiichi Mizutani; Hiroshi Harada
Proc. WPMC2022, Oct. 2022, Peer-reviewed

Radio-Protected Area Estimation Model Using Location-Dependent Gain for a Spectrum Sharing System in the VHF-Band
Keika Minaki; Sohei Yanase; Shingo Tomida; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Oct. 2022, Peer-reviewed
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Highly Efficient OFDM Applying Symbol-Edges Truncating Transmission Technique
Yuu Ichikawa; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VTC2022-Fall, Sep. 2022, Peer-reviewed

Digital Self-Interference Cancellation Scheme for Full-Duplex Cellular System in 5G
Shota Mori; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE PIMRC 2022, Sep. 2022, Peer-reviewed

Experimental Evaluation of IEEE 802.15.4 OFDM for Wireless IoT Communication Systems
Keito Nakura; Naoki Ishibashi; Hiroko Masaki; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE PIMRC 2022, Sep. 2022, Peer-reviewed

Development of Full-Duplex Cellular System for Beyond 5G and 6G Systems
Hiroshi Harada; Keiichi Mizutani; Takeshi Matsumura; Toyoyuki Kato; Ken Shioiri
Proc. IEEE PIMRC 2022, Sep. 2022, Peer-reviewed

Quantization Noise Reduction by Digital Signal Processing-Assisted Analog-to-Digital Converter for In-Band Full-Duplex Systems
Keiichi Mizutani; Hiroshi Harada
IEEE Transactions on Wireless Communications, Aug. 2022, Peer-reviewed, Lead author, Corresponding author

IEEE 802.15.4g/4x-Based Orthogonal Frequency-Division Multiplexing Transmission Scheme for Wide-Area and Mobile IoT Communication Systems
Shunsuke Kadoi; Hidetomo Ochiai; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEEE Internet of Things Journal, 15 Jul. 2022, Peer-reviewed

Single-cell Dynamic Duplex Cellular System Using Distributed Receive-only Base Stations
Keita Fukushima; Shota Mori; Keiichi Mizutani; Hiroshi Harada
2022 IEEE 95th Vehicular Technology Conference: (VTC2022-Spring), Jun. 2022, Peer-reviewed

Software-Defined Radio-Based Evaluation Platform for Highly Mobile IEEE 802.22 System
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
IEEE Open Journal of Vehicular Technology, Apr. 2022, Peer-reviewed

In-Band Full-Duplex-Applicable Area Expansion by Inter-User Interference Reduction Using Successive Interference Cancellation
Shota Mori; Keiichi Mizutani; Hiroshi Harada
IEICE Transactions on Communications, 01 Feb. 2022, Peer-reviewed

Wi-SUN FAN Multi-hop Network in Coexistence of IEEE 802.15.4 FSK and OFDM Transmission Schemes
Hidetomo Ochiai; Keiichi Mizutani; Hiroshi Harada
2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC), 14 Dec. 2021, Peer-reviewed

A Receiver for IEEE 802.15.4-based High-speed Mobile IoT Communication Systems
Hidetomo Ochiai; Keiichi Mizutani; Hiroshi Harada
2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC), 14 Dec. 2021, Peer-reviewed

Radio Sensor Development for Location Estimation Using Radio Big Data of ARIB STD-T103/119-compliant Wireless Communication Systems
Masayuki Ishizaki; Kiyoshi Yamamoto; Masahiro Asano; Keiichi Mizutani; Hiroshi Harada
2021 24th International Symposium on Wireless Personal Multimedia Communications (WPMC), 14 Dec. 2021, Peer-reviewed

Determining Memory Polynomial Model Parameters from Those of Complex p-th Order Inverse for Designing Predistorter
Michiharu Nakamura; Eisuke Fukuda; Yoshimasa Daido; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Transactions on Communications, 01 Nov. 2021, Peer-reviewed

Highly Efficient Sensing Methods of Primary Radio Transmission Systems toward Dynamic Spectrum Sharing-Based 5G Systems
Atomu SAKAI; Keiichi MIZUTANI; Takeshi MATSUMURA; Hiroshi HARADA
IEICE Transactions on Communications, 01 Oct. 2021, Peer-reviewed

Channel Measurement and Modeling Prototype for IEEE 802.22-Based Regional Area Networks
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
IEEE Access, Oct. 2021, Peer-reviewed

Feasibility Study of Wi-SUN JUTA Profile-Compliant F-RIT Protocol
Ryota OKUMURA; Keiichi MIZUTANI; Hiroshi HARADA
IEICE Transactions on Communications, Oct. 2021, Peer-reviewed

Inter-Carrier Interference Cancellation for 5G System Applying Simplified Universal Time-domain Windowed OFDM
Yuu Ichikawa; Keiichi Mizutani; Hiroshi Harada
2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall), Sep. 2021, Peer-reviewed

Highly Efficient Demodulation Scheme for In-band Full-duplex Using Heterogeneous Wireless Communication Schemes
Yudai Morikawa; Keiichi Mizutani; Hiroshi Harada
2021 IEEE 94th Vehicular Technology Conference (VTC2021-Fall), Sep. 2021, Peer-reviewed

A Novel Routing Method with Load-Balancing in Wi-SUN FAN Network
Rei Hirakawa; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
2021 IEEE 7th World Forum on Internet of Things (WF-IoT), 14 Jun. 2021, Peer-reviewed

Efficient Polling Communications for Multi-Hop Networks Based on Receiver-Initiated MAC Protocol
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Transactions on Communications, 01 May 2021, Peer-reviewed

Data Rate Enhancement of FSK Transmission Scheme for IEEE 802.15.4-Based Field Area Network
Yueying Xiang; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEEE Sensors Journal, 01 Apr. 2021, Peer-reviewed

Inter-User Interference Reduction Applying Successive Interference Cancellation for Dynamic-duplex Cellular System
Shota Mori; Keiichi Mizutani; Hiroshi Harada
2021 IEEE 93rd Vehicular Technology Conference (VTC2021-Spring), Apr. 2021, Peer-reviewed

An Initial Study of Dynamic-Duplex Cellular System on 5G NR Downlink in High SHF Band
Yuya Arakawa; Kazuki Nishikori; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), 09 Jan. 2021, Peer-reviewed

Radio Protection Area Estimation Methods for Spectrum Sharing-based 5G System
Shingo Tomida; Keiichi Mizutani; Hiroshi Harada
2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), 09 Jan. 2021, Peer-reviewed

A Routing Protocol toward Reliable Mobile Communication in Wi-SUN FAN
Robby Wayong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
2021 IEEE 18th Annual Consumer Communications & Networking Conference (CCNC), 09 Jan. 2021, Peer-reviewed

A High-speed Wi-SUN FAN Network by Highly-Dense Frequency Hopping
Hidetomo Ochiai; Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall), Nov. 2020, Peer-reviewed

Channel Modeling Algorithm for TVWS-based IEEE 802.22 WRAN System in Rural Areas
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
2020 IEEE 92nd Vehicular Technology Conference (VTC2020-Fall), Nov. 2020, Peer-reviewed

High-efficient Sensing Methods of Primary Wireless Transmission System for Dynamic Spectrum Sharing-based 5G System
Atomu Sakai; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2020, Oct. 2020, Peer-reviewed

Development of Evaluation Platform for IEEE 802.22-based Highly Mobile WRAN Communication System with an SDR-based Receiver
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
Proc. WPMC 2020, Oct. 2020, Peer-reviewed

Analytical Model of Quantization Noise for In-Band Full-duplex Wireless Communications
Keiichi Mizutani; Hiroshi Harada
Proc. WPMC 2020, Oct. 2020, Peer-reviewed, Lead author

Coexistence of Synchronous and Asynchronous MAC Protocols for Wireless IoT Systems in Sub-Gigaherz Band
Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE WF-IoT 2020, Jun. 2020, Peer-reviewed

Data Rate Enhancement for IEEE 802.15.4 Based FSK Transmission Scheme
Yueying Xiang; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE WF-IoT 2020, Jun. 2020, Peer-reviewed

A Scheduling Scheme for Channel Hopping in Wi-SUN FAN Systems toward Data Throughput Enhancement
Robby Wayong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VTC 2020-Spring, May 2020, Peer-reviewed

Self-interference Cancellation Utilizing Superposition Modulation Technique for Single Carrier Full-duplex System
Shuzhi Liu; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE VTC 2020-Spring, May 2020, Peer-reviewed

Enhanced Universal Filtered-DFTs-OFDM for Long-Delay Multipath Environment
Yuji MIZUTANI; Hiroto KURIKI; Yosuke KODAMA; Keiichi MIZUTANI; Takeshi MATSUMURA; Hiroshi HARADA
IEICE Transactions on Communications, 01 Apr. 2020, Peer-reviewed

Dependable Source Routing Scheme for Multi-Hop Networks Based on Receiver-Initiated MAC Protocol
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2020, Jan. 2020, Peer-reviewed

A Home Area Heterogeneous Wireless Management Scheme by Wi-SUN FAN and Wi-Fi Systems
Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2020, Jan. 2020, Peer-reviewed

Evaluation of CSL-based Low Power MAC Protocol for Wireless Smart Metering Networks
Kai Samejima; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2020, Jan. 2020, Peer-reviewed

Stabilization of Multi-Hop Routing Construction in Wi-SUN FAN Systems
Daiki Hotta; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2020, Jan. 2020, Peer-reviewed

Wireless Smart Ubiquitous Network by CSL-based Low Power MAC Protocol
Kai Samejima; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2020, Jan. 2020, Peer-reviewed

A Simplified Memory Polynomial Predistorter Using Restricted LTI Block Parameters
Michiharu NAKAMURA; Yasuyuki OHISHI; Eisuke FUKUDA; Yoshimasa DAIDO; Keiichi MIZUTANI; Takeshi MATSUMURA; Hiroshi HARADA
IEICE Trans. Electron., Dec. 2019, Peer-reviewed

A Reliable Channel Estimation Scheme Using Scattered Pilot Pattern for IEEE 802.22-Based Mobile Communication System
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
IEEE TRANSACTIONS ON COGNITIVE COMMUNICATIONS AND NETWORKING, Dec. 2019, Peer-reviewed

Possibility of Dynamic Spectrum Sharing System by VHF-band Radio Sensor and Machine Learning
Takayuki Hayashida; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE DySPAN 2019 Workshop on DD-DSS, Nov. 2019, Peer-reviewed

UTW-OFDM-based 5G New Radio with Low Out-of-band Emission
Riichi Yokoyama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
2019 22nd International Symposium on Wireless Personal Multimedia Communications (WPMC), Nov. 2019, Peer-reviewed

Enhancement of User Perceived Throughput in Sub-6 GHz Integrated Access and Backhaul with Dynamic Full-duplex
Kyoya Teramae; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE VTC 2019-Fall, Sep. 2019, Peer-reviewed

User Throughput Enhancement with Dynamic Full-Duplex Cellular System in Dense Urban Multi-cell Environment
Kazuki Nishikori; Kyoya Teramae; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE PIMRC 2019, Sep. 2019, Peer-reviewed

Comprehensive Performance Evaluation of Universal Time-Domain Windowed OFDM-Based LTE Downlink System
Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Transactions on Communications, Aug. 2019, Peer-reviewed, Lead author

Performance Evaluation of Multi-hop Network Configuration for Wi-SUN FAN Systems
Thidarut Junjalearnvong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2019, Jan. 2019, Peer-reviewed

A Low-pass Filtered Time-domain Window for DFTs-OFDM to Reduce Out-of-band Emission with Low Complexity
Yuji Mizutani; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE CCNC 2019, Jan. 2019, Peer-reviewed

Analysis and Experimental Verification of F-RIT Protocol for Wireless Smart Utility Network
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE CCNC 2019, Jan. 2019, Peer-reviewed

Enhanced F-RIT Protocol for Wireless Smart Utility Networks with High Traffic Bi-Directional Communications
Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada
IEICE TRANSACTIONS ON COMMUNICATIONS, Dec. 2018, Peer-reviewed

A TV White Space Wireless Broadband Prototype for Wireless Regional Area Network
Hiroshi Harada; Kiminobu Makino; Keiichi Mizutani; Takeshi Matsumura
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

Macro-Cell Capacity Enhancement with Dynamic Full-Duplex Cellular System
Takeshi Matsumura; Hiroto Kuriki; Keiichi Mizutani; Hiroshi Harada
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

Performance Evaluation of Universal Time-domain Windowed GFDM-based LTE Uplink
Keiichi Mizutani; Yosuke Kodama; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2018, Nov. 2018, Peer-reviewed, Lead author

A Low Pass Filtered-Raised-Cosine Window for UTW-DFTs-OFDM
Yuji Mizutani; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

A Robust Channel Estimation for IEEE 802.22 Enabling Wide Area Vehicular Communication
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

Practical Analysis of CSL Low Power MAC Protocol Based on IEEE 802.15.4e Frame Structure
Kai Samejima; Ryota Okumura; Takuya Habara; Keiichi Mizutani; Hiroshi Harada
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

An Effective Near-Field Measurement Using Multicarrier Modulation Signal
Riichi Yokoyama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada; Masaaki Fuse; Hanako Noda
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

A Frequency-domain ICI Cancellation Using Weight Matrix Based on Window Shape for Simplified UTW-OFDM
Akihito Yoshito; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2018, Nov. 2018, Peer-reviewed

A Load Balancing Algorithm for Layer 2 Routing in IEEE 802.15.10
Takuya Habara; Keiichi Mizutani; Hiroshi Harada
IEICE TRANSACTIONS ON COMMUNICATIONS, Oct. 2018, Peer-reviewed

A Dynamic Routing Protocol Supporting Mobile Nodes in Wi-SUN FAN Systems
Thidarut Junjalearnvong; Takuya Habara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed

LTE Uplink System Based on Universal Time-domain Windowed DFTs-OFDM
Yosuke Kodama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed

Time-domain Channel Equalization for Subcarrier Spacing Compressed FDM with SC-MMSE Turbo Equalization Receiver
Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed

A Transceiver Design of VHF Band Standardized Broadband Mobile Communications Systems
Kiminobu Makino; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed

Performance Evaluation of TD-LTE in VHF-band for Large Coverage Public Broadband Communications System
Keiichi Mizutani; Hiroto Kuriki; Yosuke Kodama; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed, Lead author

A Comprehensive Study of Universal Time-domain Windowed OFDM-based LTE Downlink System
Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed, Lead author

A UTW-OFDM Without Symbol Overlapping Process for Small Cell Networks
Akihito Yoshito; Yosuke Kodama; Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. WPMC 2017, Dec. 2017, Peer-reviewed

Feasibility Study of F-RIT Low-power Consumption MAC Protocol Complied with IEEE 802.15.4/4e for Wireless Smart Utility Networks
Fujiwara Jun; Okumura Ryota; Mizutani Keiichi; Harada Hiroshi
IEEJ Transactions on Electronics, Information and Systems, Nov. 2017, Peer-reviewed

Enhanced Universal Filtered-DFTs-OFDM for Long-delay Multi-path Environment
Yuji Mizutani; Hiroto Kuriki; Yosuke Kodama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE PIMRC 2017, Oct. 2017, Peer-reviewed

Experimental Evaluation of Universal Time-domain Windowed OFDM-based LTE Downlink System by Real-time Wave-shaping
Keiichi Mizutani; Akihito Yoshito; Hiroto Kuriki; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE PIMRC 2017, Oct. 2017, Peer-reviewed

IEEE 802.15.4g Based Wi-SUN Communication Systems
Hiroshi Harada; Keiichi Mizutani; Jun Fujiwara; Kentaro Mochizuki; Kentaro Obata; Ryota Okumura
IEICE TRANSACTIONS ON COMMUNICATIONS, Jul. 2017, Peer-reviewed

Compact IEEE 802.22-based Radio Equipment Enabling Easy Installation for Regional Area Network System using TV White-spaces
Takeshi Matsumura; Hiroki Ueno; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE LANMAN 2017, Jul. 2017, Peer-reviewed

A Load Balancing Algorithm for Layer 2 Routing based Wi-SUN Systems
Takuya Habara; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VTC 2017-Spring, Jun. 2017, Peer-reviewed

Enhanced UF-OFDM for Long-delay Multipath Fading Environment
Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEEE VTC 2017-Spring, Jun. 2017, Peer-reviewed

A Broadcast Protocol for IEEE 802.15.4e RIT Based Wi-SUN Systems
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE VTC 2017-Spring, Jun. 2017, Peer-reviewed

Experimental Evaluation and Analysis of F-RIT Low Power MAC Protocol Complied with IEEE 802.15.4e
Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE WCNC 2017, Mar. 2017, Peer-reviewed

An Implementable Channel and CFO Estimation Scheme for IEEE 802.22-based Radio Equipment
Hiroki Ueno; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEEE WCNC 2017 Workshop on Smart Spectrum, Mar. 2017, Peer-reviewed

Development and field experiment of wide area Wi-SUN system based on IEEE 802.15.4g
Kentaro Mochizuki; Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
2016 IEEE 3rd World Forum on Internet of Things (WF-IoT), Dec. 2016, Peer-reviewed

Ultra-low Power MAC Protocol Complied with RIT in IEEE 802.15.4e for Wireless Smart Utility Networks
Jun Fujiwara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada; Sota Tsuchiya; Takuya Kawata
2016 IEEE 27TH ANNUAL INTERNATIONAL SYMPOSIUM ON PERSONAL, INDOOR, AND MOBILE RADIO COMMUNICATIONS (PIMRC), Nov. 2016, Peer-reviewed, Last author

Ultra-low power MAC protocol complied with RIT in IEEE 802.15.4e for wireless smart utility networks
Jun Fujiwara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada; Sota Tsuchiya; Takuya Kawata
2016 IEEE 27th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications (PIMRC), Sep. 2016, Peer-reviewed

Carrier frequency offset estimation scheme for IEEE 802.15.4g based wide area Wi-SUN systems
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
2016 IEEE International Conference on Communications (ICC), May 2016, Peer-reviewed

Carrier frequency offset estimation scheme for IEEE 802.15.4g based wide area Wi-SUN systems
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
2016 IEEE International Conference on Communications (ICC), May 2016, Peer-reviewed

Some Initial Results and Observations from a Series of Trials within the Ofcom TV White Spaces Pilot
Oliver Holland; Shuyu Ping; Nishanth Sastry; Pravir Chawdhry; Jean-Marc Chareau; James Bishop; Hong Xing; Suleyman Taskafa; Adnan Aijaz; Michele Bavaro; Philippe Viaud; Tiziano Pinato; Emanuele Anguili; Mohammad Reza Akhavan; Julie McCann; Yue Gao; Zhijin Qin; Qianyun Zhang; Raymond Knopp; Florian Kaltenberger; Dominique Nussbaum; Rogerio Dionisio; Jose Ribeiro; Paulo Marques; Juhani Hallio; Mikko Jakobsson; Jani Auranen; Reijo Ekman; Heikki Kokkinen; Jarkko Paavola; Arto Kivinen; Tomaz Solc; Mihael Mohorcic; Ha-Nguyen Tran; Kentaro Ishizu; Takeshi Matsumura; Kazuo Ibuka; Hiroshi Harada; Keiichi Mizutani
2015 IEEE 81st Vehicular Technology Conference (VTC Spring), May 2015, Peer-reviewed

IEEE 802.11af Indoor Experiment in UK Ofcom TVWS Trial Pilot Program
Keiichi Mizutani; Kentaro Ishizu; Takeshi Matsumura; Ha Nguyen Tran; Hirokazu Sawada; Homare Murakami; Fumihide Kojima; Hiroshi Harada
2015 IEEE 81st Vehicular Technology Conference (VTC Spring), May 2015, Peer-reviewed

Path Loss and Throughput Estimation Models for an IEEE 802.11af Prototype
Hirokazu Sawada; Keiichi Mizutani; Kentaro Ishizu; Takeshi Matsumura; Ha-Nguyen Tran; Homare Murakami; Fumihide Kojima; Hiroshi Harada
2015 IEEE 81st Vehicular Technology Conference (VTC Spring), May 2015, Peer-reviewed

Propagation Measurement for TVWS interference Evaluation
Hirokazu Sawada; Tomoshige Kan; Keiichi Mizutani; Kentaro Ishizu; Homare Murakami; Hiroshi Harada
2014 Asia-Pacific Microwave Conference, Nov. 2014, Peer-reviewed

Building Penetration Loss Measurements for TVWS Systems
Hirokazu Sawada; Tomoshige Kan; Keiichi Mizutani; Kentaro Ishizu; Homare Murakami; Hiroshi Harada
2014 Asia-Pacific Microwave Conference, Nov. 2014, Peer-reviewed

Propagation Loss Model in Short Range LoS Environment for TV White Space Systems using Low Antenna Height Base Station
Kan Tomoshige; Sawada Hirokazu; Mizutani Keiichi; Ishizu Kentaro; Murakami Homare; Harada Hiroshi; Takada Jun-ichi
The Journal of The Institute of Image Information and Television Engineers, Oct. 2014, Peer-reviewed

Field experiment of long-distance broadband communications in TV white space using IEEE 802.22 and IEEE 802.11af
Kentaro Ishizu; Keigo Hasegawa; Keiichi Mizutani; Hirokazu Sawada; Kei Yanagisawa; Toh Keat-Beng; Takeshi Matsumura; Seishi Sasaki; Masahiro Asano; Homare Murakami; Hiroshi Harada
2014 International Symposium on Wireless Personal Multimedia Communications (WPMC), Sep. 2014, Peer-reviewed

IEEE 802.11af TVWS-WLAN with Partial Subcarrier System for Effective TVWS Utilization
Keiichi Mizutani; Zhou Lan; Hiroshi Harada
IEICE TRANSACTIONS ON COMMUNICATIONS, Apr. 2014, Peer-reviewed

Time-Domain Windowing Design for IEEE 802.11af Based TVWS-WLAN Systems to Suppress Out-of-Band Emission
Keiichi Mizutani; Zhou Lan; Hiroshi Harada
IEICE TRANSACTIONS ON COMMUNICATIONS, Apr. 2014, Peer-reviewed

Adaptive time-domain windowing based transmit power control for TVWS-WLAN systems
Keiichi Mizutani; Hiroshi Harada
2014 IEEE Wireless Communications and Networking Conference (WCNC), Apr. 2014, Peer-reviewed

IEEE 802.11af with Partial Subcarrier System for effective use of TV White Spaces
Keiichi Mizutani; Zhou Lan; Ryuhei Funada; Hiroshi Harada
Proc. IEEE ICC 2013 Workshop Telecom R2S, Jun. 2013, Peer-reviewed, Lead author

Design and implementation of a Wi-Fi prototype system in TVWS based on IEEE 802.11 af
Zhou Lan; Keiichi Mizutani; Gabriel Villardi; Hiroshi Harada
2013 IEEE Wireless Communications and Networking Conference (WCNC), Apr. 2013, Peer-reviewed

Experiment on MIMO two-way relaying using transmit beamforming
Vutha Va; Keiichi Mizutani; Yutaro Kida; Kei Sakaguchi; Kiyomichi Araki; Takehiro Miyamoto
2012 IEEE 23rd International Symposium on Personal, Indoor and Mobile Radio Communications - (PIMRC), Sep. 2012, Peer-reviewed

Experimental Study of Doppler Effect for Underwater Acoustic Communication Using Orthogonal Signal Division Multiplexing
Tadashi Ebihara; Keiichi Mizutani
JAPANESE JOURNAL OF APPLIED PHYSICS, Jul. 2012, Peer-reviewed

Network Synchronization Scheme for Scalable Two-Way Multi-Hop Network Employing MIMO Network Coding
Yutaro Kida; Keiichi Mizutani; Gia Khanh Tran; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
2012 IEEE 75th Vehicular Technology Conference (VTC Spring), May 2012, Peer-reviewed

Prototype Hardware for TDD Two-Way Multi-Hop Relay Network Using MIMO Network Coding
Keiichi Mizutani; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
IEICE TRANSACTIONS ON COMMUNICATIONS, May 2012, Peer-reviewed

Multi-user Data Sharing Using Coordinator with Network Coding and Layered Transmission
Keiichi Mizutani; Thomas Haustein; Kei Sakaguchi
Proc. EWC 2012, Apr. 2012, Peer-reviewed, Invited, Lead author

Performance Analysis of MIMO Relay Network via Propagation Measurement in L-Shaped Corridor Environment
Namzilp Lertwiram; Gia Khanh Tran; Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
IEICE TRANSACTIONS ON COMMUNICATIONS, Apr. 2012, Peer-reviewed

Study of Doppler Shift Correction for Underwater Acoustic Communication Using Orthogonal Signal Division Multiplexing
Tadashi Ebihara; Keiichi Mizutani
JAPANESE JOURNAL OF APPLIED PHYSICS, Jul. 2011, Peer-reviewed

Realization of TDD Two-way Multi-hop Relay Network with MIMO Network Coding
Keiichi Mizutani; Yutaro Kida; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
Proceedings of the 6th International ICST Conference on Cognitive Radio Oriented Wireless Networks and Communications, Jun. 2011, Peer-reviewed

Network throughput of TDD/TDMA two-way multi-hop relay network with MIMO network coding in indoor environment
Keiichi Mizutani; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
2010 IEEE 21st International Symposium on Personal, Indoor and Mobile Radio Communications Workshops, Sep. 2010, Peer-reviewed

Complexity Suppression of Neural Networks for PAPR Reduction of OFDM Signal
Masaya Ohta; Keiichi Mizutani; Katsumi Yamashita
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES, Sep. 2010, Peer-reviewed

Network Synchronization for Two-Way Multi-Hop Relay Networks with Block Modulation
Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
2010 IEEE 71st Vehicular Technology Conference, May 2010, Peer-reviewed

MIMO Radio Propagation Measurement for Two-Hop Relay Network on L-Shaped Corridor with Network Performance Analysis
Namzilp Lertwiram; Gia Khanh Tran; Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
2010 IEEE 71st Vehicular Technology Conference, May 2010, Peer-reviewed

Hardware Prototype for Two-Way Multi-Hop Relay Network with MIMO Network Coding
Keiichi Mizutani; Takehiro Miyamoto; Takamichi Kanno; Kei Sakaguchi; Kiyomichi Araki
2010 IEEE 71st Vehicular Technology Conference, 2010, Peer-reviewed

Phase Shift Keying Acoustic Communication in Air with Impulse Response
Tadashi Ebihara; Keiichi Mizutani; Takeshi Ohbuchi; Naoto Wakatsuki; Koichi Mizutani; Koichi Morikawa
JAPANESE JOURNAL OF APPLIED PHYSICS, Jul. 2009, Peer-reviewed

Locality of Area Coverage on Digital Acoustic Communication in Air using Differential Phase Shift Keying
Keiichi Mizutani; Tadashi Ebihara; Naoto Wakatsuki; Koichi Mizutani
JAPANESE JOURNAL OF APPLIED PHYSICS, Jul. 2009, Peer-reviewed

Differential Phase Shift Keying Acoustic Communication in Air for Low-Signal-to-Noise Ratio Environment
Keiichi Mizutani; Naoto Wakatsuki; Koichi Mizutani
JAPANESE JOURNAL OF APPLIED PHYSICS, Aug. 2008, Peer-reviewed

Complexity suppression of neural networks for PAPR reduction of OFDM signal and its FPGA implementation
Masaya Ohta; Keiichi Mizutani; Naoki Fujita; Katsumi Yamashita
2008 IEEE International Joint Conference on Neural Networks (IEEE World Congress on Computational Intelligence), Jun. 2008, Peer-reviewed

A PAPR reduction of OFDM signal using neural networks with tone injection scheme
Keiichi Mizutani; Masaya Ohta; Yasuo Ueda; Katsumi Yamashita
2007 6th International Conference on Information, Communications & Signal Processing, Dec. 2007, Peer-reviewed

Acoustic Communication in Air Using Differential Biphase Shift Keying with Influence of Impulse Response and Background Noise
Keiichi Mizutani; Naoto Wakatsuki; Koichi Mizutani
JAPANESE JOURNAL OF APPLIED PHYSICS, Jul. 2007, Peer-reviewed, Lead author

Relationship between Time of Flight (TOF) Measurement Error and Phase Characteristics of Sound Probe
Ikuo Odanaka; Keiichi Mizutani; Koichi Mizutani
Proc. ICSV13, Jul. 2006, Peer-reviewed

Differential Biphase Shift Keying (DBPSK) Using Airborne Sound for Data Communication
Keiichi Mizutani; Naoto Wakatsuki; Koichi Mizutani
Proc. ICSV13, Jul. 2006, Peer-reviewed, Lead author

Misc.

UL clustering method considering multi-user interference for cell-free wireless network
Yusei Yasuba; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Dec. 2024

疑似干渉生成機構を用いた5Gマルチセルエミュレーションシステム
鳴川偉仁; 武田和樹; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jul. 2024

ソフトウェア無線機を用いたオープンソース型5Gプラットフォームによる高能率OFDM方式に関する一検討
武田和樹; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2024, Invited

5Gアップリンクに重畳する受信機能分散型基地局によるDynamic Full-Duplexセルラシステムのマルチセル拡張技術
休場裕生; 福島慶大; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jan. 2024

Wi-SUN FANの概要，伝送特性，今後の展望
原田博司; 正木弘子; 水谷圭一
電子情報通信学会技術研究報告, Jan. 2024, Invited, Last author

帯域内全二重通信の段階的導入を実現するDynamic Full-Duplex Cellularシステム
水谷圭一; 原田博司
電子情報通信学会技術研究報告, Oct. 2023, Invited, Lead author, Corresponding author

オープンソース型5GプラットフォームへのSimplified UTW-OFDM方式の導入とその基礎特性
武田和樹; 水谷圭一; 原田博司
電子情報通信学会ソサイエティ大会講演予稿集, Sep. 2023

5G信号を用いたFull-Duplex Cellularシステムにおける端末間干渉低減手法の基礎特性評価
森聖太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jul. 2023

Cell-free wireless Networkのための送信電力制御に関する一検討
福島慶大; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jul. 2023

ソフトウェア無線機による5Gダウンリンク信号高精度検出電波センサの開発と基礎特性評価
佐々木祐斗; 森聖太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2023

オープンソース型プラットフォームによるSimplified UTW-OFDM方式を導入した5Gエミュレータの基礎伝送特性評価
武田和樹; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2023

オープンソース型5GプラットフォームへのSimplified UTW-OFDM方式実装に関する一検討
武田和樹; 水谷圭一; 原田博司
電子情報通信学会総合大会講演予稿集, Mar. 2023

異種無線システムを用いた周波数共用5Gシステムに関する研究開発
水谷圭一; 原田博司; 石﨑雅之; 山本清志; 浅野勝洋
電子情報通信学会技術研究報告, Mar. 2023, Invited, Lead author, Corresponding author

6G時代のミリ波無線通信システム
原田博司; 森聖太; 大見則親; 香田優介; 水谷圭一
電子情報通信学会技術研究報告, Mar. 2023, Invited

VHF帯電波受信電力遷移情報を用いたテンプレートマッチングによる高精度端末位置推定手法
皆木渓夏; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2023

VHF帯電波ビッグデータと機械学習による端末位置推定
水谷圭一
ITコンソーシアム京都 AI・IoT活用部会講演会, Jan. 2023, Invited, Lead author, Corresponding author

次世代公共用自営無線通信システムを志向した周波数共用および電波応用利用技術に関する検討
水谷圭一; 原田博司
令和4年度電気関係学会関西連合大会講演予稿集, Nov. 2022, Invited, Lead author, Corresponding author

VHF帯電波ビッグデータと機械学習を用いた端末位置推定手法
水谷圭一
日本学術会議電気電子工学委員会URSI分科会無線通信システム信号処理小委員会（URSI-C小委員会）第25期第4回公開研究会, Sep. 2022, Invited, Lead author, Corresponding author

送信シンボル時間短縮を用いた高能率STT-OFDM方式の基礎伝送特性
市川遊; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2022

SUN-FSK信号送信とSUN-OFDM信号受信を同時実現する異種無線通信方式全二重通信システム
森川雄大; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2022

VHF帯電波ビッグデータを用いた位置推定手法のための広域系WRANシステム電波モニタリング手法の屋外検証
山本清志; 石﨑雅之; 浅野勝洋; 水谷圭一; 原田博司
電子情報通信学会総合大会講演予稿集, Mar. 2022

5Gアップリンク信号検出のための電波センサに関する検討
水谷圭一; 速水誠太; 原田博司
電子情報通信学会総合大会講演予稿集, Mar. 2022, Lead author, Corresponding author

VHF帯における周波数共用のための高効率電波保護領域算出モデル
皆木渓夏; 富田晋伍; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2022

VHF帯電波センシング情報を活用したSub-6GHz帯周波数共用システムにおける電波保護領域推定法
富田晋伍; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2022

5G信号を用いたFull-Duplex Cellularシステム実現のためのディジタル自己干渉キャンセル方式
森聖太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2022

5G信号を用いたFull-Duplex Cellularシステムの物理層無線通信プロトタイプの基礎通信特性
森聖太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2022

受信機能分散型基地局によるシングルセルDynamic Duplex Cellularシステムの基本伝送特性
福島慶大; 森聖太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2022

Wi-SUN FAN ネットワークにおける上りリンク用環境適応送信電力制御法
石橋直樹; 平川怜; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jan. 2022

6Gを志向した波形整形OFDM方式
水谷圭一; 原田博司
令和3年度電気関係学会関西連合大会講演予稿集, Dec. 2021, Invited, Lead author, Corresponding author

階層的クラスタリング機械学習による遅延プロファイルを用いた端末位置推定
平田詢; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Nov. 2021

6Gを志向した短距離無線通信技術に関する検討
水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2021, Lead author, Corresponding author

IEEE 802.15.4 OFDM伝送方式を用いたWi-SUN FANシステムの伝送特性に関する研究
落合英智; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2021

ユニバーサル時間軸窓型OFDMを用いた5Gシステムにおける高能率受信技術
市川遊; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2021

異種無線通信方式を用いた全二重通信システムにおける高能率復調法
森川雄大; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2021

電波ビッグデータを用いた位置推定手法のための広域系WRANシステム電波モニタリングに関する一検討
石﨑雅之; 山本清志; 浅野勝洋; 水谷圭一; 原田博司
電子情報通信学会総合大会講演予稿集, Mar. 2021

IoT用環境適応型無線通信システムを志向したIEEE 802.15.4 OFDM伝送方式
門井駿介; 落合英智; 奥村亮太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2021

帯域内全二重通信における量子化雑音解析モデル
水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jan. 2021, Lead author, Corresponding author

逐次干渉キャンセラを用いたDynamic Duplex Cellularシステムにおける端末間干渉低減法
森聖太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jan. 2021

高SHF帯5G NRダウンリンクに重畳するDynamic-Duplexセルラシステムの基礎特性評価
荒川侑也; 錦織和樹; 水谷圭一; 松村武; 原田博司
電子情報通信学会技術研究報告, Nov. 2020

近距離無線通信技術を用いた接触可能性検知システムにおける障害物の影響
正木弘子; ワヨンロビー; 奥村亮太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Nov. 2020, Invited

Beyond 5G システムを志向したDynamic-Duplex セルラシステム
原田博司; 水谷圭一; 松村武
MWE2020, Nov. 2020

ダイナミック周波数共用 Beyond 5G システム実現のための電波センサ技術
原田博司; 水谷圭一; 松村武
電子情報通信学会ソサイエティ大会講演予稿集, Sep. 2020

周波数共用型5Gシステムにおける電波保護領域推定技術
富田晋伍; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2020

A Routing Protocol toward Seamless Handover for Mobile Nodes in Wi-SUN FAN
Robby Wayong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
電子情報通信学会技術研究報告, Aug. 2020

広域系WRANによる電波ビッグデータを用いた高能率周波数共用システムの研究開発概要
水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2020, Invited, Lead author, Corresponding author

無線フィールドエリアネットワークにおけるバッテリ駆動端末向けMACプロトコルの特性解析
奥村亮太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2020

近距離無線通信技術を用いた接触可能性検知システムの基礎特性
正木弘子; 奥村亮太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Aug. 2020

Channel Modeling Algorithm for Rural Area Communication System in TV White Spaces
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
電子情報通信学会技術研究報告, Jul. 2020

同期信号即時解析に向けたVHF帯ブロードバンド移動通信システムの高速受信ゲイン制御手法に関する一検討
石﨑雅之; 山本清志; 阿部達也; 浅野勝洋; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2020

PHY Performance Evaluation of IEEE 802.22-based Highly Mobile Wide Area Communication System with an SDR-based Prototype
欧陽睿婷; 松村武; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2020

VHF帯周波数共用のための保護領域算出モデル
柳瀬創平; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Jun. 2020

京都市街地環境で測定したVHF 帯遅延プロファイルを用いた機械学習による屋外位置推定
林田尚之; 水谷圭一; 原田博司
電子情報通信学会総合大会, Mar. 2020

周波数共用型5Gシステム実現のための高精度5G NRダウンリンク信号検出手法
横山梨一; 水谷圭一; 松村武; 原田博司
電子情報通信学会技術研究報告, Mar. 2020

［招待講演］ダイナミック周波数共用実現に向けた研究開発
山崎浩輔; 林高広; 天野良晃; 岸洋司; 藤井威生; 安達宏一; 原田博司; 水谷圭一; 高田潤一; 齋藤健太郎; 不破泰; 田久修; 澤井亮; 木村亮太; 馬場覚志; 掛札祐範; 金本英樹; 安永毅
電子情報通信学会技術研究報告, Mar. 2020, Invited

医療・介護での利用を志向したIEEE 802.15.4gシステムの屋内伝送実験
正木弘子; 奥村亮太; 水谷圭一; 原田博司
電子情報通信学会技術研究報告, Mar. 2020

Position Estimation of User Equipment Using VHF-band Delay Profiles in Urban Area and Machine Learning
Takayuki Hayashida; Keiichi MIzutani; Hiroshi Harada
IEICE Technical Report, Mar. 2020

A Routing Method for Improvement of Transmission Performance in Wi-SUN FAN Network
Rei Hirakawa; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Mar. 2020

Terminal Position Estimation Using Delay Profile and Machine Learning
Keiichi Mizutani; Hiroshi Harada
IEICE technical Report, Mar. 2020, Invited, Lead author, Corresponding author

A Highly Dense Frequency Hopping for High-speed Wi-SUN FAN Network
Hidetomo Ochiai; Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Jan. 2020

Field Experiment of IEEE 802.15.4 Based High-Speed FSK Transmission Scheme
Yueying Xiang; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Jan. 2020

Improvement of Uplink Delay for Polling-based Multi-Hop Networks with Receiver-Initiated MAC Protocols
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
Proc. IEICE 2019 Society Conference, Sep. 2019

Wave-shaped OFDM with Time Window for Beyond 5G
Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proc. IEICE 2019 Society Conference, Sep. 2019

Dependable Downlink Route Configuration Scheme for Multi-Hop Networks Based on Receiver-Initiated MAC Protocol
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Aug. 2019

Universal Time-domain Windowed-OFDM for 5G New Radio
Riichi Yokoyama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, Aug. 2019

Transmission Route Configuration and Access Schemes for Multi-Hop Networks based on Receiver-Initiated MAC Protocol
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Jun. 2019

Co-existence of Synchronous and Asynchronous Protocols for Wireless IoT Systems in 920 MHz-band
Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Jun. 2019

A Channel Hopping Scheduling toward Throughput Enhancement in Wi-SUN FAN Systems
Robby Wayong; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Jun. 2019

Frequency-domain ICI Cancellation for UTW-OFDM without Symbol Overlapping
Akihito Yoshito; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, Mar. 2019

Filtered Time Window to Reduce Implementation Complexity of UF-OFDM Transmitter
Yuji Mizutani; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, Mar. 2019

Routing Metric Calculation Schemes for Wireless Mesh Network Based on IEEE 802.15.10 L2R Protocol
Kai Samejima; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Mar. 2019

Experimental Evaluation of Co-existence for Wireless Communication Systems Using 920 MHz-band
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Nov. 2018

An Experimental Evaluation of Optimum Resource Allocation and Automatic Routing Algorithms for Multi-hop Wide Area Wireless RAN System
Kai Samejima; Keiichi Mizutani; Takuya Habara; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, Nov. 2018

A Home Area Network Integrated 920MHz-band and 2.4GHz-band Wireless Systems
Kiyoshi Mizutani; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Nov. 2018

Evaluation of Dynamic-duplex Cellular System on LTE Uplink under Micro-cell Environment
Kyoya Teramae; Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, Jun. 2018

Near-Field Measurement for Wideband Antenna with Multicarrier Modulation Signal
Riichi Yokoyama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada; Masaaki Fuse; Hanako Noda
IEICE Technical Report, Jun. 2018

Wi-SUN Field Area Network: Wi-SUN FUN
Hiroshi Harada; Keiichi Mizutani
Proceedings of IEICE General Conference 2018, Mar. 2018

Experimental Performance Evaluation of Multi-Hop Configuration and Transmission in Wi-SUN FAN Devices
Thidarut Junjalearnvong; Takuya Habara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, Feb. 2018

長遅延伝搬環境に対応した改良型UF-DFT拡散OFDM方式
水谷侑二; 栗木寛斗; 児玉洋介; 水谷圭一; 松村武; 原田博司
電子情報通信学会関西支部第22回学生会研究発表講演会発表要旨集, Feb. 2017

マルチパス低遅延環境における高能率UTW-OFDM方式の窓関数
吉戸章人; 児玉洋介; 栗木寛斗; 水谷圭一; 松村武; 原田博司
電子情報通信学会関西支部第22回学生会研究発表講演会発表要旨集, Feb. 2017

Multihop relay field experiment using the VHF band broadband mobile communication system in rural area
Kei Yanagisawa; Tasuya Abe; Yoshihiro Kawashima; Kiyoshi Yamamoto; Masayuki Takekawa; Masayuki Ishizaki; Tomohiro Nozaki; Junya Dosaka; Masahiro Asano; Kazue Kato; Hiroshi Harada; Keiichi Mizutani
IEICE Technical Report, Jun. 2015, Last author

High-efficiency Sensing Methods of Primary Wireless Transmission System for Spectrum Sharing-based 5G System
Atomu Sakai; Keiichi MIzutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 23 Jan. 2020

A Novel Channel Estimation and Phase Compensation Scheme for IEEE 802.22-based Mobile Communication Systems in TV White-Space
Ruiting Ouyang; Takeshi Matsumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, May 2018

Multihop relay field experiment using the VHF band broadband mobile communication system
石﨑雅之; 柳澤慶; 阿部達也; 山本清志; 池田克則; 髙橋勇佑; 富樫竜太郎; 堂坂淳也; 日向野貴光; 浅野勝洋; 加藤数衞; 原田博司; 松村武; 水谷圭一; 羽原拓哉
IEICE Technical Report, 28 Feb. 2018

Optimum Resource Allocation and Automatic Routing Algorithms for Multi-hop Wide Area Wireless RAN Systems
Takuya Habara; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 28 Feb. 2018

Evaluation of Dynamic-duplex Cellular System on LTE Downlink under Macro-cell Environment
Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 28 Feb. 2018

Evaluation of Dynamic-duplex Cellular System on LTE Downlink under Micro-cell Environment
Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 28 Feb. 2018

Analysis of CSL Low Power MAC Protocol for Wireless Smart Metering Networks
Kai Samejima; Ryota Okumura; Takuya Habara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 28 Feb. 2018

Field Experiment of IEEE 802.15.4g-based System in Open Space for Water Smart Metering Systems
Ryota Okumura; Takuya Habara; Kai Samejima; Akira Dan; Kiyoshi Mizutani; Keiichi MIzutani; Hiroshi Harada; Takuya Shiba
IEICE Technical Report, 18 Dec. 2017

Feasibility Study of JUTA Profile for Wi-SUN Compliant F-RIT Protocol
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 13 Nov. 2017

Field Experiment in Office Building Environment of IEEE 802.15.10 L2R Protocol-based Wireless Smart Utility Network
Takuya Habara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 13 Nov. 2017

A Dynamic Routing Protocol Supporting Mobile Nodes in Wi-SUN FAN Systems
Junjalearnvong Thidarut; Takuya Habara; Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 21 Aug. 2017

[Invited Talk] UTW-OFDM for the 5G Systems
Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 21 Aug. 2017, Invited, Lead author, Corresponding author

A UTW-DFTs-OFDM without Symbol Overlapping for Short Delay Multi-Path Environment
Naoki Izumi; Yosuke KodamalHiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 19 Jul. 2017

Channel and CFO Estimation Scheme for TV White-space Wide Area Mobile Communication Systems based on IEEE 802.22
Takeshi Matsumura; Hiroki Ukeno; Ruiting Ouyang; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 19 Jul. 2017

Propagation Loss Model in Short Range LoS Environment for TV White Space Systems using Low Antenna Height Base Station
菅智茂; 沢田浩和; 水谷圭一; 石津健太郎; 村上誉; 原田博司; 高田潤一
映像情報メディア学会誌 = The journal of the Institute of Image Information and Television Engineers, Jul. 2017

Feasibility Study of IEEE 802.15.10 L2R Protocol for Wireless Smart Utility Networks
Takuya Habara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 12 Jun. 2017

A UTW-OFDM without Symbol Overlapping for Short-delay Multipath Environment
Akihito Yoshito; Yosuke Kodama; Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 12 Jun. 2017

An Experimental Evaluation of UTW-OFDM on LTE Downlink System for 5G
Keiichi Mizutani; Akihito Yoshito; Hiroto Kuriki; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 25 May 2017, Lead author, Corresponding author

5th Generation M2M/IoT Wireless Network for Ultra-Big Data Creation
Hiroshi Harada; Keiichi Mizutani; Takeshi Matsumura
IEICE Technical Report, 25 May 2017

Time-domain Equalization Scheme for Subcarrier Interval Compressed FDM
Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 01 Mar. 2017

Many-to-one Transmission Characteristics of F-RIT Low Power MAC Protocol for Wireless Smart Utility Networks
Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 01 Mar. 2017

A Load Balancing Routing Algorithm for IEEE 802.15.10 L2R Based on Received Signal Weakness
Takuya Habara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 01 Mar. 2017

TD-LTE in VHF Band for Large Coverage Broadband Systems
Keiichi Mizutani; Hiroto Kuriki; Yosuke Kodama; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 01 Mar. 2017, Lead author, Corresponding author

UF-DFT spread OFDM scheme for Long Delay Multi-path Environment
Yuji Mizutani; Hiroto Kuriki; Yosuke Kodama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 01 Mar. 2017

High-efficiency UTW-OFDM for Short Delay Multi-path Environment
Akihito Yoshito; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proceedings of IEICE 2017 General Conference, Mar. 2017

High-efficiency UTW-SC-FDE for Short Delay Multi-path Environment
Naoki Izumi; Yosuke Kodama; Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
Proceedings of the 22nd Student Convention of Kansai-Section of the Institute of Electronics, Information and Communication Engineers, Japan, Feb. 2017

Universal Time-domain Windowed Single Carrier Frequency-domain Equalization
Yosuke Kodama; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada
IEICE Technical Report, 21 Dec. 2016

High-efficient Diversity Reception Scheme for IEEE 802.15.4g-based Systems
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 19 Dec. 2016

Implementation and Experimental Evaluation of F-RIT Low Power MAC Protocol for Wireless Smart Utility Networks : Improvement of Transmission Characteristics under High Traffic Environment
Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 19 Dec. 2016

[Requested Talk] Wave-shaped OFDM for 5G mobile communication systems
Keiichi Mizutani; Takeshi Matsumura; HIroshi Harada
IEICE Technical Report, 20 Oct. 2016, Invited, Lead author, Corresponding author

Implementation and Experimental Evaluation of F-RIT Low Power MAC Protocol for Wireless Smart Utility Networks : Bidirectional Transmission Characteristics under Interference Environments
Ryota Okumura; Jun Fujiwara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 17 Oct. 2016

Anti-multipath Transmission Schemes to UF-OFDM in Long Delay Spread Channel
Hiroto Kuriki; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 22 Jun. 2016

Transmission Characteristics of IEEE 802.15.4g Based Device-to-device Communication Systems in Smart Water-Metering Environments
Takuya Habara; Ryota Okumura; Kentaro Obata; Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada; Takuya Shiba
IEICE Technical Report, 13 Jun. 2016

Field Experiment of IEEE 802.15.4g Based System for Water Smart Metering Systems
Ryota Okumura; Takuya Habara; Kentaro Obata; Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada; Takuya Shiba
IEICE Technical Report, 19 May 2016

Requested Talk : Wide-area Wi-SUN System for IoT
Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 16 May 2016, Invited, Lead author

A Load Balancing Algorithm for Layer 2 Routing based Wireless Smart Utility Network
Takuya Habara; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 12 May 2016

Evaluation of LTE Based UTW-OFDM Waveform
Keiichi Mizutani; Hiroshi Harada
IEICE Technical Reprot, 02 Mar. 2016, Lead author, Corresponding author

Experimental Evaluation of ARIB STD-T103 VHF Broadband Mobile Communication Systems
Kiminobu Makino; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 02 Mar. 2016

UTW-OFDM Based White Space WLAN Systems
Keiichi Mizutani; Hiroshi Harada
IEICE Technical Reprot, 02 Mar. 2016, Lead author, Corresponding author

Development of IEEE 802.15.4g Compliant Software Receiver for Multi-vender Wireless Smart Utility Networks
Kentaro Obata; Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 02 Mar. 2016

Receiver design for IEEE 802.22 based TV white space mobile communication systems
Hiroki Ueno; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 02 Mar. 2016

Multi-channel Multi-waveform Operational Base Station Platform for 5th Generation Mobile Communication Systems
Hiroshi Harada; Keiichi Mizutani
IEICE Technical Reprot, 02 Mar. 2016

A broadcast protocol for IEEE 802.15.4e RIT based Wireless smart utility networks
Ryota Okumura; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 02 Mar. 2016

FFT based High-efficient Receiver for FSK Packet Transmission Systems
Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 02 Mar. 2016

Field Experiment of IEEE 802.15.4g Based System with Forward Error Correction
Yuuki Matsumura; Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 02 Mar. 2016

Enhanced UF-OFDM for Large Delay Spread Channel
Kuriki Hiroto; Mizutani Keiichi; Harada Hiroshi
Proceedings of the IEICE General Conference, 01 Mar. 2016

Evaluation of windowing functions for UTW-OFDM
Mizutani Keiichi; Harada Hiroshi
Proceedings of the IEICE General Conference, 01 Mar. 2016

A Low-power-consumed Load Balancing Algorithm for Hierarchical Mesh Tree Networks
Habara Takuya; Mizutani Keiichi; Harada Hiroshi
Proceedings of the IEICE General Conference, 01 Mar. 2016

Experimental Evaluations of Carrier Frequency Offset Estimation Scheme for IEEE 802.15.4g Based Systems
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Reprot, 21 Dec. 2015

Universal-Windowed Orthogonal Frequency Division Multiplexing
Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 21 Dec. 2015, Lead author, Corresponding author

<大学の研究・動向>第5世代ブロードバンド移動通信システムに関する研究
原田博司; 村田英一; 水谷圭一
Cue : 京都大学電気関係教室技術情報誌, Sep. 2015
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Field Experiment of the IEEE 802.15.4g Based System in the Tea Plantation
Mochizuki Kentaro; Obata Kentaro; Mizutani Keiichi; Harada Hiroshi
Proceedings of the Society Conference of IEICE, 25 Aug. 2015

Field Experiment of IEEE 802.15.4g Based System
Kentaro Mochizuki; Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 24 Aug. 2015

Symbol Synchronization Scheme for Wide Area M2M Wireless Communication Systems
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 24 Aug. 2015

Performance Evaluation of ARIB STD-T103 VHF Broadband Mobile Communication Systems
Kiminobu Makino; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 24 Jun. 2015

Carrier Frequency Offset Estimation Scheme for Wide Area M2M Wireless Communication Systems
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 15 Jun. 2015

Area Expansion Schemes for IEEE 802.15.4g based Systems
Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 15 Jun. 2015

Development of path loss and throughput estimation models using IEEE 802.11af Prototypes
Hirokazu Sawada; Keiichi Mizutani; Kentaro Ishizu; Takeshi Matsumura; Ha Nguyen Tran; Homare Murakami; Fumihide Kojima; Hiroshi Harada
IEICE Technical Report, 15 Jun. 2015

Prototype of IEEE 802.11af-based High Power Communication Devices and Field Experiment in London
Takeshi Matsumura; Kentaro Ishizu; Keiichi Mizutani; Homare Murakami; Fumihide Kojima; Hiroshi Harada
IEICE Technical Report, 28 May 2015

Field experiments of VHF-band broadband mobile communication system in rural area
Hiroshi Harada; Keiichi Mizutani; Masayuki Takekawa; Kei Yanagisawa
IEICE Technical Report, 21 May 2015

Receiver design for VHF broadband mobile communication systems
Kiminobu Makino; Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 04 Mar. 2015

IEEE 802.15.4g based wide area mobile Wi-SUN communication systems
Hiroshi Harada; Keiichi Mizutani; Kentaro Mochizuki; Kentaro Obata
IEICE Technical Report, 04 Mar. 2015

Carrier Frequency Offset Estimation Scheme for IEEE 802.15.4g System in 920 MHz Band
Kentaro Obata; Keiichi Mizutani; Hiroshi Harada
Proceedings of the IEICE General Conference, 24 Feb. 2015

Frame Synchronization Scheme for Wide Area M2M Wireless Communication System
Tatsuro Wada; Keiichi Mizutani; Hiroshi Harada
Proceedings of the IEICE General Conference, 24 Feb. 2015

Adaptive Decode Scheme for IEEE 802.15.4g Radio Communication System
Kentaro Mochizuki; Keiichi Mizutani; Hiroshi Harada
Proceedings of the IEICE General Conference, 24 Feb. 2015

Field Experiment in U.K. TV White-spaces with IEEE802.11af-based Communication System
Takeshi Matsumura; Kentaro Ishizu; Tran Ha Nguyen; Keiichi Mizutani; Homare Murakami; Fumihide Kojima; Hiroyuki Yano; Hiroshi Harada
Proceedings of the IEICE General Conference, 24 Feb. 2015

A Broadband Mobile Communication Prototype in VHF Band
Hiroshi Harada; Keiichi Mizutani
IEICE Technical report, 22 Jan. 2015

Overview of IEEE 802.11af Wireless Local Area Network Systems Operating in TV White Space
Keiichi Mizutani; Hiroshi Harada
SYSTEMS, CONTROL AND INFORMATION, 2015, Peer-reviewed, Lead author

Resource Allocation and Cell Association Algorithm for Inter-Operator Spectrum and Infrastructure Sharing in Heterogeneous Network
Kei Inage; Keiichi Mizutani; Homare Murakami; Kentaro Ishizu; Fumihide Kojima
IEICE Technical Report, 12 Nov. 2014

Field Experiments in the White Space Pilot Program Organized by U.K. Ofcom
Kentaro Ishizu; Ha Nguyen Tran; Takeshi Matsumura; Keiichi Mizutani; Kazuo Ibuka; Homare Murakami; Fumihide Kojima; Hiroshi Harada
Proccesings of International Workshop on Smart Wireless Communications 2015, Oct. 2014

A study on a spectrum sharing technique "white space LTE" and its future deployment
Homare Murakami; Kentaro Ishizu; Kazuo Ibuka; Takeshi Matsumura; Keiichi Mizutani; Kei Inage; Hiroshi Harada; Mikio Hasegawa; Hiroyuki Morikawa
Proceedings of the Society Conference of IEICE, 09 Sep. 2014

Estimation of Building Penetration Loss Coefficient in UHF Band
Hirokazu Sawada; Tomoshige Kan; Keiichi Mizutani; Kentaro Ishizu; Homare Murakami; Hiroshi Harada
Proceedings of the Society Conference of IEICE, 09 Sep. 2014

Building Penetration Loss Measurements for TVWS Systems
Hirokazu Sawada; Tomoshige Kan; Keiichi Mizutani; Kentaro Ishizu; Homare Murakami; Hiroshi Harada
IEICE Technical Report, 18 Aug. 2014

Study of Propagation Loss Model for Short Range Communications in TV White Space Band Using Low Base Station Antenna Height
Tomoshige Kan; Hirokazu Sawada; Keiichi Mizutani; Chunyi Song; Kentaro Ishizu; Homare Murakami; Hiroshi Harada; Jun-ichi Takada
IEICE Technical Report, 16 Jun. 2014

Research and Development of IEEE 802.11af TV White Space WLAN Systems
Keiichi Mizutani
Proc. of NICT-VTT Joint Workshop, Jun. 2014, Lead author

Field Experiments in TV white space (3) : Radio Propagation Characteristics Evaluation
Hirokazu Sawada; Tomoshige Kan; Keiichi Mizutani; Kentaro Ishizu; Homare Murakami; Hiroshi Harada; Keigo Hasegawa; Kei Yanagisawa; Masahiro Asano
Proceedings of the IEICE General Conference, 04 Mar. 2014

Field Experiments in TV White Space (2) : Heterogeneous Wireless Multi-hop Networking
Kentaro Ishizu; Keigo Hasegawa; Keiichi Mizutani; Hirokazu Sawada; Kei Yanagisawa; Toh Keat-Beng; Masayuki Takekawa; Seishi Sasaki; Masahiro Asano; Homare Murakami; Hiroshi Harada
Proceedings of the IEICE General Conference, 04 Mar. 2014

Field Experiments in TV White Space (1) : Experiments on Long-range Radio Transfer
Keigo Hasegawa; Kentaro Ishizu; Kei Yanagisawa; Toh Keat-Beng; Masayuki Takekawa; Hirokazu Sawada; Keiichi Mizutani; Seishi Sasaki; MasahiroAsano; Homare Murakami; Hiroshi Harada
Proceedings of the IEICE General Conference, 04 Mar. 2014

Research and Development of IEEE 802.11af System Implementation
Keiichi Mizutani; Takeshi Matsumura; Kentaro Ishizu; Zhou Lan; Homare Murakami; Hiroshi Harada
IEICE Technical Report, 03 Mar. 2014, Invited, Lead author

Field Experiment of Long-distance Broadband Communications in TV White Space
Kentaro Ishizu; Keigo Hasegawa; Keiichi Mizutani; Hirokazu Sawada; Kei Yanagisawa; Toh Keatbeng; Seishi Sasaki; Masahiro Asano; Homare Murakami; Hiroshi Harada
IEICE Technical Report, 03 Mar. 2014

A Study on Propagation Loss Model for TV White Space Systems
Hirokazu Sawada; Tomoshige Kan; Keiichi Mizutani; Kentaro Ishizu; Homare Murakami; Hiroshi Harada
IEICE Technical Report, 03 Mar. 2014

A study of optimum resource utilization on FDD/TDD White Space LTE System
Homare Murakami; Kentaro Ishizu; Kazuo Ibuka; Takeshi Matsumura; Keiichi Mizutani; Hirokazu Sawada; Hiroshi Harada; Mikio Hasegawa; Hiroyuki Morikawa
IEICE Technical Report, 03 Mar. 2014

Dynamic Spectrum Access Network with Wireless Clouds toward 5G Mobile Communication Systems
Hiroshi Harada; Homare Murakami; Kentaro Ishizu; Stanislav Filin; Zhou Lan; Masayuki Oodo; Fumihide Kojima; Chang-Woo Pyo; Keiichi Mizutani; Takeshi Matsumura; Kazuo Ibuka
IEICE Technical Report, 23 Jan. 2014

Development and Standardization Activities of White Space Communication Systems
Hiroshi Harada; Homare Murakami; Kentaro Ishizu; Stanislav Filin; Zhou Lan; Fumihide Kojima; Chang-Woo Pyo; Keiichi Mizutani; Takeshi Matsumura; Kazuo Ibuka
IEICE Technical Report, 18 Dec. 2013

TV放送周波数帯の未利用部分で無線LANサービスを実現する IEEE 802.11afのあらましとそれを支える技術 (特集現行システムを復習しIEEE 802.11acなどの新技術に迫る! 今さら聞けない無線LANのABC) -- (無線LANの最新テクノロジ)
水谷圭一; 藍洲; 原田博司
RFワールド : 無線と高周波の技術解説マガジン, Nov. 2013

White Space Communication Network with IEEE 802.11af/IEEE 802.22 Capable of Primary User Protection and Secondary User Coexistence
Kentaro Ishizu; Keigo Hasegawa; Masayuki Takekawa; Keiichi Mizutani; Zhou Lan; Ha Nguyen Tran; Stanislav Filin; Takeshi Matsumura; Kei Yanagisawa; Keatbeng Toh; Homare Murakami; Seishi Sasaki; Masahiro Asano; Hiroshi Harada
IEICE Technical Report, 24 Oct. 2013

Adaptive Time-domain Windowing and Transmit Power Control for Wireless Communication Systems Operating on TV White Spaces
Keiichi Mizutani; Hiroshi Harada
IEICE Technical Report, 24 Oct. 2013, Lead author

Prototype Hardware of IEEE 802.11af/D5.0 for Wireless LAN Systems Operating on TV White Spaces
Keiichi Mizutani; Takeshi Matsumura; Kentaro Ishizu; Zhou Lan; Homare Murakami; Hiroshi Harada
IEICE Technical Report, 24 Oct. 2013, Lead author

Researches and Developments of TV White Space Communication Technologies in NICT
Homare Murakami; Kentaro Ishizu; Chunyi Song; Stanislav Filin; Zhou Lan; Keiichi Mizutani; Fumihide Kojima; Hiroshi Harada
Proceedings of the Society Conference of IEICE, 03 Sep. 2013

Experimental Evaluation of Wireless LAN Inhastmcture in TV White Space
Kentaro Ishizu; Keiichi Mizutani; Homare Murakami; Hiroshi Harada
Proceedings of the IEICE General Conference, 05 Mar. 2013

A Study of Time-domain Windowing for Out-of-band Emission Suppression of OFDM based TVWS Systems
Keiichi Mizutani; Ryuhei Funada; Hiroshi Harada
IEICE Technical Report, 27 Feb. 2013, Lead author

Multi-channel Wireless LAN with Variable Bandwidth in TV White Space
Keiichi Mizutani; Ryuhei Funada; Zhou Lan; Hiroshi Harada
IEICE Technical Report, 23 Aug. 2012, Lead author

[招待講演] IEEE 802.11af標準化の概要
藍洲; 水谷圭一; Gabriel Villardi; Ha-Nguyen Tran; 原田博司
電子情報通信学会短距離無線通信研究会（2種研）発表予稿集, Aug. 2012, Invited

Experiment on MIMO Two-way Relaying using Transmit Beamforming
Vutha Va; Keiichi Mizutani; Yutaro Kida; Kei Sakaguchi; Kiyomichi Araki; Takehiro Miyamoto
IEICE Technical Report, 29 Feb. 2012

海洋・水中音響マルチパス測定型水中音響多重通信とドップラーシフト補償 : 水中での安定したデータ伝送を目指して
海老原格; 水谷圭一
超音波techno, Nov. 2011

Experimental Study on Doppler Shift Compensation for Underwater Acoustic Communication Using Orthogonal Signal Division Multiplexing
Tadashi Ebihara; Keiichi Mizutani
Proceedings of Symposium on Ultrasonic Electronics, Nov. 2011

Network Synchronization for TDD-OFDM Two-way Multi-hop Relay Networks withMIMO Network Coding
Keiichi Mizutani; Tran Khanh Gia; Kei Sakaguchi; Kiyomichi Araki
Proceedings of the Society Conference of IEICE, 30 Aug. 2011, Lead author

Time Synchronized MIMO Two-way Relay Network Enabling Dynamic Node Participation
Yutaro Kida; Keiichi Mizutani; Tran Khanh Gia; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 21 Jul. 2011

950MHz帯無線電力伝送における定在波問題対策技術
前原大樹; 水谷圭一; 阪口啓; 荒木純道; 白土正; 古川実; 宮本健宏; 根岸美紀
電子情報通信学会総合大会講演論文集, 28 Feb. 2011

Node extension typed synchronization method for MIMO multi-hop relay network
Yutaro Kida; Keiichi Mizutani; Tran Khanh Gia; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 23 Feb. 2011

MIMO Two-Way Multi-hop Relay Networks
Kei Sakaguchi; Keiichi Mizutani; Rindranirina Ramamonjison; Tran Khanh Gia
IEICE Technical Report, 09 Dec. 2010

Doppler Shift Compensation for Underwater Acoustic Communication Using Orthogonal Signal Division Multiplexing
Tadashi Ebihara; Keiichi Mizutani
Proceedings of Symposium on Ultrasonic Electronics, Dec. 2010

Development of cognitive wireless node at 950MHz band
Takahiro Kurosama; Keiichi Mizutani; Takuji Sasou; Noriyuki Arisaka; Takehiro Miyamoto; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 13 May 2010

Wireless Grid to Realize Ubiquitous Networks with Wireless Energy Supply
Kei Sakaguchi; Ragil Ptro Wicaksono; Keiichi Mizutani; Tran Khanh Gia
IEICE Technical Report, 24 Feb. 2010

Propagation Measurement of MIMO Relay Network in Strong Shadowing Indoor Environment at 5GHz Band
Namzilp Lertwiram; Tran Khanh Gia; Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 24 Feb. 2010

Inter-Symbol Interference with Impulse Response and its Effect for Acoustic Communication
Tadashi Ebihara; Keiichi Mizutani; Takeshi Ohbuchi; Naoto Wakatsuki; Koichi Mizutani
Proceedings of Symposium on Ultrasonic Electronics, Nov. 2009

Hardware Prototype for Two-way Multi-hop Relay Network with MIMO Network Coding
Keiichi Mizutani; Takehiro Miyamoto; Takamichi Kanno; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, Oct. 2009, Lead author

Multi-channel Two-way Multi-hop Relay Network Hardware Prototype
Keiichi Mizutani; Takehiro Miyamoto; Takamichi Kanno; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 22 Jul. 2009, Lead author

MIMO-OFDM Two-way Multihop Network and Network Synchronization Scheme
Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 21 May 2009, Lead author

950MHz帯におけるFFTに基づくキャリアセンス機能の設計
尾渡裕成; 水谷圭一; 阪口啓; 荒木純道; 島田修作
電子情報通信学会平成20年度東京支部学生会研究発表会, Mar. 2009

Phase Shift Keying Modulation with Impulse Response for Ultrasonic Communication
Tadashi Ebihara; Keiichi Mizutani; Naoto Wakatsuki; Koichi Mizutani; Koichi Morikawa
Proceedings of Symposium on Ultrasonic Electronics, Nov. 2008

Locality of Area Coverage on Acoustic Communication in Air using Differential Phase Shift Keying
Keiichi Mizutani; Tadashi Ebihara; Naoto Wakatsuki; Koichi Mizutani
Proceedings of Symposium on Ultrasonic Electronics, Nov. 2008, Lead author

Development of Cognitive MIMO Mesh Relay Node
Keiichi Mizutani; Tran Khanh Gia; Kiyomichi Araki; Kenji Ohishi; Ken-ichi Kamada; Shusaku Shimada; Fumie Ono; Kei Sakaguchi
Proceedings of the Society Conference of IEICE, 02 Sep. 2008, Lead author

Cognitive MIMO Mesh Relay Node at 950MHz Band
Keiichi Mizutani; Tran Khanh Gia; Kiyomichi Araki; Kenji Oishi; Ken-ichi Kamada; Shusaku Shimada; Fumie Ono; Kei Sakaguchi
IEICE Technical Report, 24 Jul. 2008, Lead author

Performance Comparison between Feedback and Feedback-less Method to obtain CSIT in Multi-user MIMO Precoding
Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Report, 05 Mar. 2008, Lead author

DPSK Acoustic Communication in Air with Reduction of Impulse Response Influence for Low SNR Environment
Mizutani Keiichi; Wakatsuki Naoto; Mizutani Koichi
Proceedings of Symposium on Ultrasonic Electronics, Nov. 2007, Lead author

Experiment of Capacity Improvement by MIMO Relay
Keiichi Mizutani; Khanh Tran Gia; Masashi Noda; Leng Ky; Kei Sakaguchi; Kiyomichi Araki
Proceedings of the Society Conference of IEICE, Sep. 2007, Lead author

MIMO Relay Channel Measurement System and Initial Measurement Results
Masashi Noda; Tran Khanh Gia; Ky Leng; Keiichi Mizutani; Kei Sakaguchi; Kiyomichi Araki
IEICE Technical Teport, 26 Jul. 2007

Interlaced Neural Network for the Peak Power Reduction in OFDM
Mizutani Keiichi; Ohta Masaya; Yamashita Katsumi
Proceedings of the IEICE General Conference, 07 Mar. 2007, Lead author

PAPR Reduction of OFDM Signal by HNN and its Computational Complexity Suppression
Keiichi Mizutani; Masaya Ohta; Yasuo Ueda; Katsumi Yamashita
IEICE Technical Report, 26 Feb. 2007, Lead author

オーバーサンプリングを用いた連続時間OFDM信号のピーク電力抑圧とその計算量の削減
水谷圭一; 森敦史; 太田正哉; 山下勝己
電気関係学会関西支部連合大会, Nov. 2006, Lead author

Acoustic Communication in Air Using DBPSK with Influence by Impulse Response
Mizutani Keiichi; Wakatsuki Naoto; Mizutani Koichi
Proceedings of Symposium on Ultrasonic Electronics, Nov. 2006, Lead author

Books and Other Publications

Opportunistic Spectrum Sharing and White Space Access: The Practical Reality (Part V, Chapter 22)
Kentaro Ishizu; Keiichi Mizutani; Takeshi Matsumura; Ha-Nguyen Tran; Stanislav Filin; Hirokazu Sawada; Hiroshi Harada, Joint work
WILEY, 2015, Not refereed
Find Kyoto University's collection of books :

第５章 TV放送周波数帯の未利用部分で無線LANサービスを実現するーIEEE 802.11afのあらましとそれを支える技術
Keiichi Mizutani; Zhou Lan; Hiroshi Harada, Joint work
CQ出版社, RFワールド, No. 24, Oct. 2013, Not refereed

ホワイトスペースを用いた無線LANシステムの実証実験に成功 -国際標準暫定規格 "IEEE 802.11af Draft 2.0" に世界で初めて準拠-
Keiichi Mizutani; Zhou Lan; Hiroshi Harada, Joint work
独立行政法人情報通信研究機構, NICT NEWS 12月号, no. 423, Dec. 2012, Not refereed

マルチパス測定型水中音響多重通信とドップラーシフト補償
Tadashi Ebihara; Keiichi Mizutani, Joint work
日本工業出版, 超音波テクノ 11・12月号, Dec. 2011, Not refereed

Industrial Property Rights

US11,737,077, 特願2018-219641, Transmission Device and Transmission Method
Keiichi Mizutani; Hiroshi Harada; Takeshi Matsumura; Yuji Mizutani

特開2022-135813, 特願2021-035888, 線局位置推定装置、無線局位置推定システム及び無線局位置推定方法
石崎雅之; 浅野勝洋; 山本清志; 原田博司; 水谷圭一

特願2022-127879, 送信装置及び送信方法、受信装置及び受信方法
水谷圭一; 原田博司; 市川遊

特開2021-164023, 特願2020-062107, 通信装置および通信方法
水谷圭一; 原田博司; 松村武; リュウショシ

特許7463630, 特開2021-111874, 特願2020-002724, 信号検出装置
水谷圭一; 原田博司; 松村武; 酒井愛富

特許7167392, 特開2020-88576, 特願2018-219641, 送信装置および送信方法
水谷圭一; 原田博司; 松村武; 水谷侑二

特許7152636, 特開2019-117969, 特願2017-249829, 通信装置及び通信方式
水谷圭一; 原田博司; 松村武; 羽原拓哉

US 11,405,811, JP, 2018-005230, Communication Apparatus and Communication Method
Naoki Kusashima; Ryota Kimura; Kazuyuki Shimezawa; Ryo Sawai; Hiroto Kuriki; Keiichi Mizutani; Takeshi Matsumura; Hiroshi Harada

特許7062437, 特願2017-249354, 無線通信システムおよび無線通信方法
石崎雅之; 阿部達也; 柳澤慶; 原田博司; 松村武; 水谷圭一

US 11,277,749, JP, 2017-249829, Communication Device and Communication System
Keiichi Mizutani; Hiroshi Harada; Takeshi Matsumura; Takuya Habara

特許7033008, 特願2018-105113, 近傍界測定装置及び近傍界測定方法
布施匡章; 野田華子; 原田博司; 水谷圭一; 横山梨一

特許6935634, 特願2016-241637, 送信装置，送信方法，受信装置および受信方法
水谷圭一; 原田博司; 松村武; 児玉洋介

特許6892995, 特願2016-239288, 無線通信システム，無線機，および，プログラム
藤原純; 川田拓也; 坂元賢太郎; 土屋創太; 原田博司; 水谷圭一; 奥村亮太

US 10,785,061, JP, 2015-245290, Propagation Channel Estimation Method
Hiroshi Harada; Keiichi Mizutani; Kiminobu Makino

US 10,742,454, JP, 2016-241637, Transmission Device, Transmission Method, Reception Device, and Reception Method
Keiichi Mizutani; Hiroshi Harada; Takeshi Matsumura; Yosuke Kodama

US 10,581,546, JP, 2016-002695, Transmitter, Transmission Method, and Receiver Based on Time-domain Windows
Keiichi Mizutani; Hiroshi Harada

特許6632364, 特開2017-108333, 特願2015-245290, 伝搬路推定方法
原田博司; 水谷圭一; 牧野仁宣

特許6630559, 特開2017-108333, 特願2015-242046, 無線通信システム
藤原純; 川田拓也; 坂元賢太郎; 土屋創太; 原田博司; 水谷圭一

特許6619234, 特開2017-123604, 特願2016-002695, 送信装置，送信方法および受信装置
水谷圭一; 原田博司

特許6304653, 特開2015-207836, 特願2014-085936, 与干渉推定システム，無線装置
沢田浩和; 菅智茂; 宋春毅; 水谷圭一; 石津健太郎; 村上誉; 原田博司

特許6296604, 特開2015-207834, 特願2014-085913, OFDM信号送信装置
水谷圭一; 原田博司

特許6179883, 特開2014-099769, 特願2012-250593, マルチホップ無線通信システム
表昌佑; 張欣; 宋春毅; 水谷圭一; 船田龍平; 大堂雅之; 原田博司

特許6164630, 特開2014-135647, 特願2013-002774, 無線送信機，無線受信機，無線送信方法および無線受信方法
船田龍平; 水谷圭一; 原田博司

特許6074795, 特開2014-099768, 特願2012-250588, マルチホップ無線通信システム
表昌佑; 張欣; 宋春毅; 水谷圭一; 船田龍平; 大堂雅之; 原田博司

特許6061296, 特開2014-165546, 特願2013-032579, 無線送信機，無線受信機，無線通信システムおよび無線通信方法
水谷圭一; 藍洲; 船田龍平; 原田博司

US 9,450,800, JP, 2013-002774, Wireless Transmitter, Wireless Receiver, Wireless Transmission Method, and Wireless Reception Method
Ryuhei Funada; Keiichi Mizutani; Hiroshi Harada

Awards

08 Mar. 2021
IEICE Technical Committee on Smart Radio, Best Paper Award

02 Mar. 2018
IEICE Technical Committee on Smart Radio, Special Technical Award

20 Dec. 2017
WPMC, WPMC2017 Best Paper Award

12 Jun. 2017
IEEE LANMAN, IEEE LANMAN2017 Best Paper Award

19 Mar. 2017
IEEE WCNC 2017 International Workshop on Smart Spectrum, IWSS 2017 Best Paper Award

22 Aug. 2016
IEICE Technical Committee on Short Range Wireless Communications, IEICE SRW Young Researcher's Award

15 Apr. 2015
National Institute of Information and Communications Technology, 成績優秀表彰優秀賞

10 Sep. 2014
WPMC2014, WPMC2014 Best Paper Award

22 May 2014
IEICE Technical Committee on Smart Radio, 技術特別賞

27 Mar. 2014
IEEE Standards Association, 功労感謝状

11 Dec. 2013
National Institute of Information and Communications Technology, 2013年合同研究交流会ポスター優秀賞

17 Apr. 2013
National Institute of Information and Communications Technology, 成績優秀表彰優秀賞

20 May 2010
IEICE Technical Committee on Software Radio, 論文賞

18 May 2010
IEEE VTS Japan Chapter, IEEE VTS Japan 2010 Young Researcher's Encouragement Award

28 May 2009
IEICE Technical Committee on Software Radio, 技術特別賞

13 Sep. 2017
電子情報通信学会通信ソサイエティ, 活動功労賞

External funds: Kakenhi

A signal processing technology for TVWS-based wireless communication systems
Grant-in-Aid for Young Scientists (B)
Kyoto University
Keiichi Mizutani
From 01 Apr. 2015, To 31 Mar. 2018, Project Closed
OFDM;帯域外輻射抑圧;実機評価;帯域外輻射;実装;ホワイトスペース;5G;時間軸窓;周波数利用効率;UTW-OFDM;帯域外輻射電力抑圧
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15K18064/

第５世代移動通信システムにむけたＶＨＦ帯広域広帯域移動通信技術に関する研究
Grant-in-Aid for Scientific Research (A)
Kyoto University
原田博司
From 01 Apr. 2015, To 31 Mar. 2018, Declined
ブロードバンド;VHF;第５世代移動通信システム;実証試験
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15H02253/

External funds: others

ホワイトスペースにおける新たなブロードバンドアクセスの実現に向けた周波数高度利用技術の研究開発
総務省（電波利用料財源）電波資源拡大のための研究開発の委託業務
From Apr. 2012, To Mar. 2014
原田博司

複数周波数帯の動的利用による周波数有効利用技術の研究開発
総務省（電波利用料財源）電波資源拡大のための研究開発の委託業務
From 2012, To Sep. 2014
原田博司

Last Updated :2025/05/13

Education

Teaching subject(s)

From 01 Apr. 2024, To 31 Mar. 2025
Information and Communication Engineering
6115, Spring, Faculty of Engineering, 2

From 01 Apr. 2024, To 31 Mar. 2025
Information Transmission
6033, Fall, Faculty of Engineering, 2

From 01 Apr. 2024, To 31 Mar. 2025
Modulation Theory in Electrical Communication
6032, Spring, Faculty of Engineering, 2

From 01 Apr. 2024, To 31 Mar. 2025
Advanced Practice of Electrical and Electronic Engineering
6202, Fall, Faculty of Engineering, 2

From 01 Apr. 2024, To 31 Mar. 2025
Digital Communications Engineering
3622, Spring, Graduate School of Informatics, 2

From 01 Apr. 2023, To 31 Mar. 2024
Advanced Practice of Electrical and Electronic Engineering
6202, Fall, Faculty of Engineering, 2

From 01 Apr. 2023, To 31 Mar. 2024
Information and Communication Engineering
6115, Spring, Faculty of Engineering, 2

From 01 Apr. 2023, To 31 Mar. 2024
Information Transmission
6033, Fall, Faculty of Engineering, 2

From 01 Apr. 2023, To 31 Mar. 2024
Modulation Theory in Electrical Communication
6032, Spring, Faculty of Engineering, 2

From 01 Apr. 2023, To 31 Mar. 2024
Digital Communications Engineering
3622, Spring, Graduate School of Informatics, 2

From 01 Apr. 2022, To 31 Mar. 2023
Digital Communications Engineering
3622, Spring, Graduate School of Informatics, 2

From 01 Apr. 2022, To 31 Mar. 2023
Advanced Practice of Electrical and Electronic Engineering
6202, Fall, Faculty of Engineering, 2

From 01 Apr. 2015, To 30 Sep. 2015
Electrical and Electronic Engineering Advanced Practice A
Spring, 工学部

From Apr. 2017, To Mar. 2018
Practice of Electrical and Electronic Engineering
Spring, 工学部

From Apr. 2018, To Mar. 2019
Practice of Electrical and Electronic Engineering
Spring, 工学部

From Apr. 2019, To Mar. 2020
Practice of Electrical and Electronic Engineering
Spring, 工学部

From Apr. 2020, To Mar. 2021
Practice of Electrical and Electronic Engineering
Spring, 工学部

Student achievements: Awards

研究奨励賞
鮫島渓, 電子情報通信学会短距離無線通信研究専門委員会, 08 Jun. 2018

優秀学生賞
栗木寛斗, 電子情報通信学会短距離無線通信研究専門委員会, 08 Jun. 2018

優秀ポスター賞
羽原拓哉, 電子情報通信学会短距離無線通信研究専門委員会, 08 Jun. 2018

IEEE LANMAN2017 Best Paper Award
上野宏樹, IEEE LANMAN 2017, 12 Jun. 2017

研究奨励賞
羽原拓哉, 電子情報通信学会短距離無線通信研究専門委員会, 12 Jun. 2017

研究奨励賞
小幡健太郎, 電子情報通信学会短距離無線通信研究専門委員会, 12 Jun. 2017

研究助成（海外渡航）
奥村亮太, 公益財団法人村田学術振興財団, 05 Jun. 2017

IEEE VTS Tokyo Chapter 2017 Young Researcher's Encouragement Award
奥村亮太, IEEE VTS Tokyo Chapter, 05 Jun. 2017

IEEE VTS Tokyo Chapter 2017 Young Researcher's Encouragement Award
栗木寛斗, IEEE VTS Tokyo Chapter, 05 Jun. 2017

国際会議論文発表者助成事業（カテゴリーI：論文発表形式会議助成）
栗木寛斗, 公益財団法人NEC C&C財団, 14 Apr. 2017

IWSS 2017 Best Paper Award
上野宏樹, IEEE WCNC 2017 International Workshop on Smart Spectrum, 19 Mar. 2017

国際研究集会出席旅費（渡航助成）
望月健太郎, 公益財団法人電気電子情報学術振興財団, 30 Nov. 2016

研究奨励賞
望月健太郎, 電子情報通信学会短距離無線通信研究専門委員会, 22 Aug. 2016

優秀学生賞
奥村亮太, 電子情報通信学会短距離無線通信研究専門委員会, 22 Aug. 2016

優秀学生賞
小幡健太郎, 電子情報通信学会短距離無線通信研究専門委員会, 22 Aug. 2016

国際会議論文発表者助成事業（カテゴリーI：論文発表形式会議助成）
小幡健太郎, 公益財団法人NEC C&C財団, 15 Apr. 2016

Part-time lecturer

From 01 Jun. 2024, To 30 Sep. 2024
電気情報特別講義Ⅱ
鳥取大学, 工学部

Last Updated :2025/05/13

Administration

Faculty management (title, position)

From 01 Apr. 2017, To 31 Mar. 2018
情報セキュリティWG委員

From 01 Apr. 2017, To 31 Mar. 2018
システム運用WG委員

From 01 Apr. 2018, To 31 Mar. 2019
情報セキュリティWG委員

From 01 Apr. 2018, To 31 Mar. 2019
システム運用WG委員

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Mizutani, Keiichi

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External funds: Kakenhi

External funds: others

Education

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Student achievements: Awards

Part-time lecturer

Administration

Faculty management (title, position)

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