Hirokazu Sawada

50 papers B 10C 1Journal 8Unranked 31

Year	Rank	Type	Title / Venue / Authors
2026	J	`jnl`	Geographic Knowledge-Driven Transfer Learning for Enhanced Received Signal Strength Prediction. IEEE Trans. Cogn. Commun. Netw. Ou Zhao, Lin Shan, Huan-Bang Li, Hirokazu Sawada, Daisuke Matsuo, Yasushi Fuwa, Takeshi Matsumura
2025	—	`conf`	Emulator-Based Evaluation of Delay, Doppler, and Propagation Effects in Mobile Satellite Communications. WPMC Takeshi Matsumura, Hirokazu Sawada, Tomoshige Kan, Byeongpyo Jeong, Hiroyuki Tsuji
2025	—	`conf`	Experimental Evaluation of Joint Sparse Angular-Frequency Spectrum Sensing based on Compressive Sensing. WPMC Azril Haniz, Hirokazu Sawada, Takeshi Matsumura
2025	—	`conf`	Experimental Evaluation of an OFDM THz Communication System with LDPC and Turbo Codes. WPMC Kazuya Takashima, Masafumi Moriyama, Hirokazu Sawada, Takeshi Matsumura
2025	—	`conf`	Fundamental Study on the Dynamic Deployment Scheme of the Radio Propagation Parameters on the Layer-Management Enabled Wireless Emulator. WPMC Fumihide Kojima, Masahiro Takagi, Shinsuke Miwa, Toshiyuki Miyachi, Takeshi Matsumura, Hirokazu Sawada, Hiroaki Harai, Jun-ichi Takada, Hiroshi Harada
2025	—	`conf`	Local 5G Service Area Configuration Using Deep Learning-based Co-Channel Interference Prediction. WPMC Changwoo Pyo, Masafumi Moriyama, Homare Murakami, Hirokazu Sawada, Takeshi Matsumura
2025	J	`jnl`	Multipath Parameter Optimization for Improving Accuracy of Ray-Tracing-Based Received Power Prediction in Industrial Environments. IEEE Trans. Veh. Technol. Azril Haniz, Hikaru Kawasaki, Genki Hosokawa, Takuro Urushibata, Yasuyuki Yanagi, Tadahide Kunitachi, Hirokazu Sawada, Takeshi Matsumura
2025	—	`conf`	Propagation Channel Modeling for Wireless Emulator and its Integration with Discrete-event Simulators in Industrial Environments. WPMC Azril Haniz, Hirokazu Sawada, Takeshi Matsumura
2024	B	`conf`	A Simple Access Point Synchronization for THz Wireless Access System. WCNC Michiharu Nakamura, Hirokazu Sawada, Takeshi Matsumura
2024	—	`conf`	Basic Study on FSK Transmission Using Convolutional Code in Terahertz Band. WPMC Masafumi Moriyama, Kazuya Takashima, Hirokazu Sawada, Takeshi Matsumura
2024	—	`conf`	Beyond 5G Testbed Environment employing the Large-Scale Wireless Emulator enabling the Layer Management Technology. WPMC Fumihide Kojima, Masahiro Takagi, Shinsuke Miwa, Toshiyuki Miyachi, Takeshi Matsumura, Hirokazu Sawada, Hiroaki Harai, Jun-ichi Takada, Hiroshi Harada
2024	B	`conf`	Deep Learning-Based Radio Estimation Using a Semi-Automatically Created Indoor Building Information. WCNC Changwoo Pyo, Hirokazu Sawada, Takeshi Matsumura
2024	—	`conf`	Deep Learning-based Local 5G Radio Estimation for Smart Factory Environments. WPMC Changwoo Pyo, Kazuo Ibuka, Homare Murakami, Hirokazu Sawada, Takeshi Matsumura
2024	—	`conf`	Experimental Evaluation of Wireless Communication in the 28 GHz Band in a Factory Environment. ICECET Takuro Urushibata, Genki Hosokawa, Yasuyuki Yanagi, Azril Haniz, Hirokazu Sawada, Hikaru Kawasaki, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima, Tadahide Kunitachi
2024	—	`conf`	Fundamental Experiments on Modulation Schemes and Forward Error Correction in Terahertz Communication. WPMC Kazuya Takashima, Masafumi Moriyama, Hirokazu Sawada, Takeshi Matsumura
2024	J	`jnl`	Path Clustering for Radio Propagation Prediction With Moving Object in Indoor Environment. IEEE Access Masayuki Shirakawa, Rei Furukawa, Gilbert Ching, Kenshi Horihata, Yukiko Kishiki, Hirokazu Sawada, Azril Haniz, Takeshi Matsumura, Homare Murakami, Fumihide Kojima
2023	J	`jnl`	A Deep Learning-Based Indoor Radio Estimation Method Driven by 2.4 GHz Ray-Tracing Data. IEEE Access Changwoo Pyo, Hirokazu Sawada, Takeshi Matsumura
2023	B	`conf`	Novel Ray-tracing Received Power Adjustment Approach Based on the Ratio of Wavelength and Object Size. PIMRC Azril Haniz, Hikaru Kawasaki, Genki Hosokawa, Takuro Urushibata, Yasuyuki Yanagi, Tadahide Kunitachi, Hirokazu Sawada, Takeshi Matsumura
2022	—	`conf`	A 24/60-GHz Dual-Band Double-Directional Channel Sounder Using COTS Phased Arrays. ICC Workshops Minseok Kim, Hibiki Tsukada, Keiichiro Kumakura, Riku Takahashi, Naoya Suzuki, Hirokazu Sawada, Takeshi Matsumura
2022	B	`conf`	A Large-Scale Wireless Emulation Environment with Interaction between Physical and Virtual Radio Nodes for Beyond 5G Systems. PIMRC Fumihide Kojima, Toshiyuki Miyachi, Takeshi Matsumura, Hirokazu Sawada, Hiroaki Harai, Hiroshi Harada
2022	B	`conf`	Design of Radio Wave Visualization System for Office Planners and Verification of Propagation Area Visualization. PIMRC Ayaka Sakaguchi, Kensuke Sakamoto, Yuki Yamakawa, Waka Mimura, Toshiyuki Miyachi, Fumihide Kojima, Hiroaki Harai, Hirokazu Sawada, Homare Murakami, Takeshi Matsumura
2022	—	`conf`	Development and Initial Implementation of Large-scale Wireless Emulator Toward Beyond 5G. WPMC Takeshi Matsumura, Hirokazu Sawada, Toshiyuki Miyachi, Fumihide Kojima, Hiroaki Harai, Ayaka Sakaguchi, Yoshihisa Nishigori, Hiroshi Harada
2022	—	`conf`	Interference Analysis for Spectrum Sharing of Multiple Local 5G gNBs by Different Operators in a Building. WPMC Homare Murakami, Hirokazu Sawada, Takeshi Matsumura
2022	—	`conf`	Investigation of Beyond 5G-based Physical Radio Node Emulation for Large-scale Wireless Emulator. WPMC Takeshi Matsumura, Hirokazu Sawada
2022	B	`conf`	Long-term Power Fluctuation and Delay Spread Characteristics in a Factory Environment at 2.4 GHz and 5.2 GHz Bands. PIMRC Azril Haniz, Hirokazu Sawada, Hikaru Kawasaki, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima, Kensuke Matsui, Genki Hosokawa, Yasuyuki Yanagi, Tadahide Kunitachi
2022	B	`conf`	Radio-Map-Based Flight Planning of Autonomous Repeater Drones for Bridge Inspection. PIMRC Yuichi Ambe, Yoshito Okada, Yoshiki Yokota, Satoshi Abe, Fumihide Kojima, Toshiyuki Miyachi, Hiroaki Harai, Hirokazu Sawada, Takeshi Matsumura, Kazunori Ohno, Satoshi Tadokoro
2022	—	`conf`	RadioResUNet: Wireless Measurement by Deep Learning for Indoor Environments. WPMC Chang Woo Pyo, Hirokazu Sawada, Takeshi Matsumura
2021	—	`conf`	Analysis of 920 MHz Band Received Power Fluctuation in a Factory Environment. WPMC Hirokazu Sawada, Hikaru Kawasaki, Azril Haniz, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima, Kotaro Ikeda, Kensuke Matsui, Takuto Kurose, Yasuyuki Yanagi, Tadahide Kunitachi
2021	—	`conf`	Coexistence of a Low-power IEEE 802.11af Secondary User in TV White Space with Analog and Digital TV systems. WPMC Alberto S. Bañacia, Rosana J. Ferolin, Hirokazu Sawada, Kentaro Ishizu, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima
2021	—	`conf`	Experimental Study of Dynamic Data Traffic Control for the Cooperating System of Smart Personal Mobility and Indoor Intelligent Infrastructure. WPMC Chang Woo Pyo, Hirokazu Sawada, Takeshi Matsumura
2018	J	`jnl`	Characterization of Broadband Mobile Communication Channel in 200MHz Band Based on Saleh-Valenzuela Model. IEICE Trans. Commun. Hiroki Ohara, Hirokazu Sawada, Masayuki Oodo, Fumihide Kojima, Hiroshi Harada, Kentaro Saito, Jun-ichi Takada
2018	—	`conf`	Evaluation of IEEE 802.11af Compliant Devices for Vehicle to Infrastructure Communications in Suburban Environment. VNC Jeric G. Brioso, Alberto S. Bañacia, Hirokazu Sawada, Kentaro Ishizu, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima
2018	—	`conf`	Experimental Verification of ITU-R P.1411 as Path Loss Prediction Model for IEEE 802.11af. WPMC Alberto S. Bañacia, Jeric G. Brioso, Hirokazu Sawada, Kentaro Ishizu, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima
2018	—	`conf`	Vehicle to Vehicle Communications at Suburban Environment using IEEE 802.11af compliant Devices. WPMC Jeric G. Brioso, Alberto S. Bañacia, Hirokazu Sawada, Kentaro Ishizu, Kazuo Ibuka, Takeshi Matsumura, Fumihide Kojima
2018	J	`jnl`	Wideband Rectangular Antenna Fed Sideways from a Ground Plate. IEICE Trans. Commun. Kyoichi Iigusa, Hirokazu Sawada, Fumihide Kojima, Hiroshi Harada
2017	—	`conf`	90-GHz band propagation characteristics in viaduct environment for railway radiocommunication system between train and trackside. WPMC Hirokazu Sawada, Kentaro Ishizu, Fumihide Kojima, Hiroyo Ogawa, Kazuki Nakamura, Nagateru Iwasawa, Kunihiro Kawasaki, Nobuhiko Shibagaki
2017	—	`conf`	Implementation of a multi-hop network at the university campus using an IEEE 802.11af-compliant Network. WPMC Antonio Montejo, Alberto Bañacia, Hirokazu Sawada, Kentaro Ishizu, Kazuo Ibuka, Fumihide Kojima
2016	B	`conf`	Power delay profile measurement for VHF-band broadband mobile communication system. PIMRC Hiroki Ohara, Hirokazu Sawada, Masayuki Oodo, Hideki Kobayashi, Fumihide Kojima, Hiroshi Harada, Jun-ichi Takada
2015	—	`conf`	IEEE 802.11af Indoor Experiment in UK Ofcom TVWS Trial Pilot Program. VTC Spring Keiichi Mizutani, Kentaro Ishizu, Takeshi Matsumura, Ha Nguyen Tran, Hirokazu Sawada, Homare Murakami, Fumihide Kojima, Hiroshi Harada
2015	—	`conf`	Path Loss and Throughput Estimation Models for an IEEE 802.11af Prototype. VTC Spring Hirokazu Sawada, Keiichi Mizutani, Kentaro Ishizu, Takeshi Matsumura, Ha Nguyen Tran, Homare Murakami, Fumihide Kojima, Hiroshi Harada
2015	C	`conf`	Receiver diversity evaluation for a VHF band broadband mobile communication system. APCC Hirokazu Sawada, Masayuki Oodo, Tomoshige Kan, Fumihide Kojima, Hiroshi Harada, Hideki Kobayashi, Noriyuki Soma, Masafumi Moriyama, Osamu Yamamoto, Takaaki Yamato, Shigeki Yamamoto
2014	—	`conf`	Field experiment of long-distance broadband communications in TV white space using IEEE 802.22 and IEEE 802.11af. WPMC Kentaro Ishizu, Keigo Hasegawa, Keiichi Mizutani, Hirokazu Sawada, Kei Yanagisawa, Keat-Beng Toh, Takeshi Matsumura, Seishi Sasaki, Masahiro Asano, Homare Murakami, Hiroshi Harada
2012	—	`conf`	An Orthogonal Polarization Based MIMO Transmission for Advanced 60GHz WLAN. VTC Spring Masahiro Umehira, Toshiaki Sasame, Hirokazu Sawada
2012	—	`conf`	Disconnection Probability Improvement by Using Artificial Multi Reflectors for Millimeter-Wave Indoor Wireless Communications. VTC Spring Hirokazu Sawada, Shunya Takahashi, Shuzo Kato
2010	—	`conf`	Impulse Response Model and Parameters for Indoor Channel Modeling at 60GHz. VTC Spring Hirokazu Sawada, Hiroyuki Nakase, Shuzo Kato, Masahiro Umehira, Katsuyoshi Sato, Hiroshi Harada
2009	—	`conf`	A Sixty GHz Intra-Car Multi-Media Communications System. VTC Spring Hirokazu Sawada, Tomohide Tomatsu, Gen Ozaki, Hiroyuki Nakase, Shuzo Kato, Katsuyoshi Sato, Hiroshi Harada
2009	J	`jnl`	A sixty GHz vehicle area network for multimedia communications. IEEE J. Sel. Areas Commun. Hirokazu Sawada, Hiroyuki Nakase, Katsuyoshi Sato, Hiroshi Harada
2009	B	`conf`	Polarization dependence in double directional propagation channel at 60GHz. PIMRC Hirokazu Sawada, Hiroyuki Nakase, Shuzo Kato, Masahiro Umehira, Katsuyoshi Sato, Hiroshi Harada
2007	B	`conf`	Channel Model for Millimeter Wave WPAN. PIMRC Katsuyoshi Sato, Hirokazu Sawada, Yozo Shoji, Shuzo Kato
2007	J	`jnl`	NRD-Guide Passive Components and Devices for Millimeter Wave Wireless Applications. IEICE Trans. Electron. Tsukasa Yoneyama, Hirokazu Sawada, Takashi Shimizu