General Purpose TDMA LSI Development for Low Cost Earth Station. - Shuzo Kato; Masahiro Morikura; Masahiro Umehira; Kiyoshi Enomoto; Shuji Kubota (ICC, 1986)

Low C/N Modem for Satellite TDMA Network Use. - Tokihiro Miyo; Mitsuru Seta; Shuzo Kato; Masahiro Umehira (ICC, 1986)

Application of Advanced Microelectronics to Large-Scale Communication Equipment - Compact and Maintenance-Free TDMA Equipment. - Shuzo Kato; Masahiro Morikura; Masahiro Umehira; Kiyoshi Enomoto; Shuji Kubota (IEEE J. Sel. Areas Commun., 1990)

A TDMA Satellite Communication System for ISDN Services. - Shuzo Kato; Masahiro Morikura; Shuji Kubota; Hiroshi Kazama; Kiyoshi Enomoto; Masahiro Umehira (IEEE J. Sel. Areas Commun., 1992)

A New Satellite Communication System Integrated into Public Switched Networks. - DYANET. - Masahumi Ohnuki; Masahiro Umehira; Hiroshi Nakashima; Shuzo Kato (IEEE J. Sel. Areas Commun., 1992)

A network architecture of ATM wireless access with mobility support. - Masamitsu Nakura; Yasushi Motoyama; Fusao Nuno; Masahiro Umehira (PIMRC, 1996)

A novel buffer control scheme for ATM cell transport with improved cell delay variation for wireless ATM. - Hijin Sato; Masahiro Umehira (PIMRC, 1996)

A Proposal of an ATM Wireless Access System for Tetherless Multimedia Services. - Masahiro Umehira; Akira Hashimoto; Hideaki Matsue; Masamitsu Nakura (Mob. Networks Appl., 1996)

ATM wireless access for mobile multimedia: concept and architecture. - Masahiro Umehira; Masamitsu Nakura; Hijin Sato; Akira Hashimoto (IEEE Wirel. Commun., 1996)

Wireless communications in the twenty-first century: a perspective. - Mansoor Shafi; Akira Hashimoto; Masahiro Umehira; Shigeaki Ogose; Takehiro Murase (Proc. IEEE, 1997)

Error correction and error detection techniques for wireless ATM systems. - Satoru Aikawa; Yasushi Motoyama; Masahiro Umehira (Wirel. Networks, 1997)

Wireless and IP integrated system architectures for broadband mobile multimedia services. - Masahiro Umehira; Masamitsu Nakura; Makoto Umeuchi; Junichi Murayama; Takaaki Murai; Hiroyuki Hara (WCNC, 1999)

Automatic repeat request schemes for high-speed wireless access systems with constraint of finite control channel capacity. - Masafumi Yoshioka; Atsushi Ohta; Yoichi Matsumoto; Masahiro Umehira (WCNC, 1999)

Air interface access schemes for broadband mobile systems. - Max Prögler; Cengiz Evci; Masahiro Umehira (IEEE Commun. Mag., 1999)

Prototype AWA: design and implementation of a high speed ATM wireless access system using 25 GHz band. - Toshihiro Manabe; Takatoshi Sugiyama; Atsushi Ohta; Fusao Nuno; Hiroyuki Suzuki; Shuta Uwano; Satoru Aikawa; Masahiro Umehira (Comput. Networks, 1999)

Satellite communication system integrated into terrestrial ISDN. - Toru Otsu; Kazuhiro Nagayama; Akira Kurokawa; Hiroshi Nakashima; Masahiro Umehira (IEEE Trans. Aerosp. Electron. Syst., 2000)

Design and performance evaluation of software defined radio prototype for PHS and IEEE 802.11 wireless LAN. - Kazuhiro Uehara; Hiroyuki Shiba; Takashi Shono; Yushi Shirato; Hiroshi Yoshioka; Masashi Nakatsugawa; Shuji Kubota; Masahiro Umehira (PIMRC, 2002)

SDM-COFDM scheme using feed-forward inter-channel interference canceller for broadband mobile communications. - Satoshi Kurosaki; Yusuke Asai; Takatoshi Sugiyama; Masahiro Umehira (VTC Spring, 2002)

OFDM/CDMA Technologies for Future Broadband Mobile Communication Systems. - Masahiro Umehira; Takatoshi Sugiyama (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

Performance of IEEE 802.11 wireless LAN implemented on software defined radio with hybrid programmable architecture. - Takashi Shono; Hiroyuki Shiba; Yushi Shirato; Kazuhiro Uehara; Katsuhiko Araki; Masahiro Umehira (ICC, 2003)

Development of a novel SDM-COFDM prototype for broadband wireless access systems. - Takatoshi Sugiyama; Satoshi Kurosaki; Yusuke Asai; Masahiro Umehira (WCNC, 2003)

Performance evaluation of QoS control scheme that uses back pressure traffic control. - Fusao Nuno; Ichihiko Toyoda; Masahiro Umehira (PIMRC, 2004)

Development of SDM-COFDM prototype employing a hierarchical ICI canceller for MIMO-based broadband wireless access systems. - Takatoshi Sugiyama; Satoshi Kurosaki; Yusuke Asai; Daisei Uchida; Masahiro Umehira (WCNC, 2004)

Packet multiplexing transmission technique in wireless ad-hoc networks. - Shoukei Kobayashi; Masayoshi Nakayama; Masahiro Umehira (PIMRC, 2005)

Proposal of 5/25-GHz dual band OFDM-based wireless LAN for high-capacity broadband communications. - Ichihiko Toyoda; Fusao Nuno; Yoshitaka Shimizu; Masahiro Umehira (PIMRC, 2005)

Implementation and Performance Evaluation of Simple SDM-COFDM Prototype Using Propagation Coefficient Matrix Tracking for Fast Fading MIMO Channels. - Takatoshi Sugiyama; Satoshi Kurosaki; Daisei Uchida; Yusuke Asai; Masahiro Umehira (IEICE Trans. Commun., 2005)

Interference Analysis from Impulse Radio UWB Systems Using Simple Signal Models. - Yasuo Suzuki; Ichihiko Toyoda; Masahiro Umehira (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2005)

IEEE 802.11 wireless LAN implemented on software defined radio with hybrid programmable architecture. - Takashi Shono; Yushi Shirato; Hiroyuki Shiba; Kazuhiro Uehara; Katsuhiko Araki; Masahiro Umehira (IEEE Trans. Wirel. Commun., 2005)

A design of single carrier based PHY for IEEE 802.15.3c standard. - Ryuhei Funada; Hiroshi Harada; Yozo Shoji; Ryota Kimura; Yoshinori Nishiguchi; Ming Lei; Chang-Soon Choi; Fumihide Kojima; Chang Woo Pyo; Zhou Lan; Ismail Lakkis; Masahiro Umehira; et al. (PIMRC, 2007)

Concept and Feasibility Study of Wide Area Ubiquitous Network for Sensors and Actuators. - Masahiro Umehira; Hiroshi Saito; Osamu Kagami; Takafumi Fujita; Yosuke Fujino (VTC Spring, 2007)

Wide area ubiquitous network: the network operator's view of a sensor network. - Hiroshi Saito; Osamu Kagami; Masahiro Umehira; Yuichi Kado (IEEE Commun. Mag., 2008)

Polarization dependence in double directional propagation channel at 60GHz. - Hirokazu Sawada; Hiroyuki Nakase; Shuzo Kato; Masahiro Umehira; Katsuyoshi Sato; Hiroshi Harada (PIMRC, 2009)

A Novel Dynamic Channel Access Scheme Using Overlap FFT Filter-Bank for Cognitive Radio. - Motohiro Tanabe; Masahiro Umehira; Koichi Ishihara; Yasushi Takatori (IEICE Trans. Commun., 2009)

Recent Japanese R&D in Satellite Communications. - Masahiro Umehira; Kiyoshi Kobayashi; Yoshitsugu Yasui; Masato Tanaka; Ryutaro Suzuki; Hideyuki Shinonaga; Nobuyuki Kawai (IEICE Trans. Commun., 2009)

Impulse Response Model and Parameters for Indoor Channel Modeling at 60GHz. - Hirokazu Sawada; Hiroyuki Nakase; Shuzo Kato; Masahiro Umehira; Katsuyoshi Sato; Hiroshi Harada (VTC Spring, 2010)

A new spectrum sensing scheme using overlap FFT filter-bank for dynamic spectrum access. - Takanori Sato; Masahiro Umehira (CrownCom, 2011)

A guard band aggregation scheme for cognitive radio using TV white space. - Noriyuki Yaginuma; Masahiro Umehira; Ryuhei Funada; Hiroshi Harada (ICCS, 2012)

An Orthogonal Polarization Based MIMO Transmission for Advanced 60GHz WLAN. - Masahiro Umehira; Toshiaki Sasame; Hirokazu Sawada (VTC Spring, 2012)

Design and Performance of Overlap FFT Filter-Bank for Dynamic Spectrum Access Applications. - Motohiro Tanabe; Masahiro Umehira (IEICE Trans. Commun., 2012)

A novel spectrum sensing scheme using clock timing extraction based feature detection. - Kenta Sakurai; Masahiro Umehira; Shigeki Takeda (APCC, 2013)

Dynamic channel assignment based on interference measurement with threshold for multi-beam mobile satellite networks. - Masahiro Umehira; Sunao Fujita; Zhen Gao 001; Jing Wang 001 (APCC, 2013)

Dynamic channel assignment scheme with cooperative beam forming for multi-beam mobile satellite networks. - Hang Li; Zhe Zhu; Zhen Gao 001; Jing Wang 001; Masahiro Umehira (WCSP, 2014)

Location-based centralized dynamic channel assignment with channel segregation for multi-beam mobile satellite networks. - Masahiro Umehira; Sunao Fujita; Zhen Gou; Jing Wang 001 (WCSP, 2014)

Feasibility of RSSI based access network detection for multi-band WLAN using 2.4/5GHz and 60GHz. - Masahiro Umehira; Gen Saito; Sho Wada; Shigeki Takeda; Teruyuki Miyajima; Kenichi Kagoshima (WPMC, 2014)

Feasibility of Guard Band Utilization for Cognitive Radio Using TV White Space. - Noriyuki Yaginuma; Masahiro Umehira; Hiroshi Harada (IEICE Trans. Commun., 2014)

A twin cylinder model for moving human body shadowing in 60GHz WLAN. - Ting Wang; Masahiro Umehira; Hiroyuki Otsu; Shigeki Takeda; Teruyuki Miyajima; Kenichi Kagoshima (APCC, 2015)

Further evaluation of frequency cooperative ARQ scheme for multi-band WLAN. - Toshiyasu Motegi; Teruyuki Miyajima; Masahiro Umehira; Shigeki Takeda (ISCIT, 2015)

A Modified DFTs-OFDM with DC Subcarrier Shift for Low PAPR and DC Offset Error Robustness. - Shigeki Nihei; Masahiro Umehira; Shigeki Takeda (VTC Spring, 2015)

Performance Evaluation of SSB Transmission of DFTs-OFDM Using Multi-Level BPSK through Nonlinear HPA. - Masahiro Umehira; Shigeki Nihei; Hirokazu Fusayasu; Teruyuki Miyajima; Shigeki Takeda; Jun Mashino; Takatoshi Sugiyama (VTC Spring, 2015)

Experimental evaluation of a spectrum occupancy rate measurement method based on LSE estimation of Gaussian noise CDF. - Masahiro Umehira; Shota Rachi; Shigeki Takeda (APCC, 2016)

Load modulation based MIMO communication for the low complexity and low power consumption. - Changyoung An; Heung-Gyoon Ryu; Seung Hwan Lee; Masahiro Umehira; Tokumi Yokohira (ICCE, 2016)

A novel overlap FFT filter-bank using windowing and smoothing techniques to reduce adjacent channel interference for flexible spectrum access. - Motohiro Tanabe; Akira Saito; Masahiro Umehira; Shigeki Takeda (ICTC, 2016)

Ultra-multi-amplitude-level BPSK based SSB-DFTs-OFDM to achieve higher spectrum efficiency. - Hirokazu Fusayasu; Shigeki Nihei; Masahiro Umehira; Jun-ichi Abe; Jun Mashino (PIMRC, 2016)

Improving Performance by Countering Human Body Shadowing in 60GHz Band Wireless Systems by Using Two Transmit and Two Receive Antennas. - Tomoaki Nagayama; Shigeki Takeda; Masahiro Umehira; Kenichi Kagoshima; Teruyuki Miyajima (IEICE Trans. Commun., 2016)

Kriging-based RSSI prediction for cell coverage discovery using spectrum database in 5G multi-band cellular networks. - Yuto Ogawa; Masahiro Umehira; Xiaoyan Wang 003 (APCC, 2017)

Incentivizing crowdsourcing for exclusion zone refinement in spectrum sharing system. - Xiaoyan Wang 003; Masahiro Umehira; Peng Li 017; Yu Gu 003; Yusheng Ji (APCC, 2017)

Fine-Grained Incentive Mechanism for Sensing Augmented Spectrum Database. - Xiaoyan Wang 003; Masahiro Umehira; Peng Li 017; Yu Gu 003; Yusheng Ji (GLOBECOM, 2017)

Feasibility of HPA Linearization System using Amplitude Reference Pilot Signal. - Takuya Okamoto; Masahiro Umehira; Xiaoyan Wang 003; Shigeki Takeda (APCC, 2018)

Energy Efficient Learning-Based 60GHz Band Coverage Prediction for Multi-Band WLAN. - Xiaoyan Wang 003; Masahiro Umehira; Shigeki Takeda; Hiroyuki Otsu; Takyuya Kawatani (VTC Fall, 2018)

Overlap-Windowed-DFTs-OFDM with Overlap FFT Filter-Bank for Flexible Uplink Access in 5G and Beyond. - Takahiro Okano; Masahiro Umehira; Xiaoyan Wang 003; Shigeki Takeda (VTC Fall, 2018)

Energy Efficient Learning-Based Indoor Multi-Band WLAN for Smart Buildings. - Xiaoyan Wang 003; Masahiro Umehira; Hiroyuki Otsu; Takyuya Kawatani; Shigeki Takeda (IEEE Access, 2018)

Online Incentive Mechanism for Crowdsourced Radio Environment Map Construction. - Xiaoyan Wang 003; Masahiro Umehira; Biao Han; Peng Li 017; Yu Gu 003; Celimuge Wu (ICC, 2019)

An Overlap-Windowed-OQAM-DFTs-OFDM Scheme to Achieve Low PAPR and ACLP. - Mizuki Imai; Takuya Okamoto; Takahiro Okano; Masahiro Umehira; Xiaoyan Wang 003 (ISWCS, 2019)

Crowdsourced Radio Environment Mapping by Exploiting Machine Learning. - Mina Akimoto; Xiaoyan Wang 003; Masahiro Umehira; Yusheng Ji (WPMC, 2019)

Numerical Link Outage Probability Assessment using Meteorological Data for THz-Band Outdoor Wireless Communication Systems. - Yuki Hatahara; Masahiro Umehira; Xiaoyan Wang 003; Shigeki Takeda (WPMC, 2019)

A Feasibility Study on the Safety Confirmation System Using NFC and UHF Band RFID Tags. - Shigeki Takeda; Kenichi Kagoshima; Masahiro Umehira (IEICE Trans. Inf. Syst., 2019)

Deep Reinforcement Learning based Access Control for Disaster Response Networks. - Hang Zhou; Xiaoyan Wang 003; Masahiro Umehira; Xianfu Chen; Celimuge Wu; Yusheng Ji (GLOBECOM, 2020)

DPD based HPA linearizer using in-band operation point estimation pilot for mobile device applications. - Akira Tada; Masahiro Umehira; Xiaoyan Wang 003; Shigeki Takeda (ICSPCS, 2020)

Reinforcement Learning based Joint Channel/Subframe Selection Scheme for Fair LTE-WiFi Coexistence. - Yuki Kishimoto; Xiaoyan Wang 003; Masahiro Umehira (MSN, 2020)

A Framework to Determine Secure Distances for Either Drones or Robots Based Inventory Management Systems. - Budi Rahmadya; Ran Sun; Shigeki Takeda; Kenichi Kagoshima; Masahiro Umehira (IEEE Access, 2020)

An Efficient Privacy Preserving Spectrum Sharing Framework for Internet of Things. - Xiaoyan Wang 003; Masahiro Umehira; Biao Han; Hao Zhou 001; Peng Li 017; Celimuge Wu (IEEE Access, 2020)

Effect of Air Bubbles Mixed in During Phantom Fabrication on Electrical Constants. - Shingo Hayashi; Katsuyuki Fujii; Yasuyuki Okumura; Masahiro Umehira (GCCE, 2021)

Evaluation of 3D Virtualization Accuracy for VR-Based Personal Basketball Team-Practice System. - Hiroki Honma; Yoshiaki Iida; Yasuyuki Okumura; Katsuyuki Fujii; Masahiro Umehira (GCCE, 2021)

Proto-type Development of Vibration-induced Haptic Shoes for Perceiving the Front Obstacle. - Kosuke Nakagawa; Yasuyuki Okumura; Katsuyuki Fujii; Masahiro Umehira (GCCE, 2021)

FFT-based frequency domain filter design for multichannel overlap-windowed-DFTs-OFDM signals. - Motoki Ishibashi; Masahiro Umehira; Xiaoyan Wang 003; Shigeki Takeda (VTC Spring, 2021)

A Simplified DPD Linearizer using Operation Point Estimation Pilot Signals for Mobile Terminal Application in TDD Wireless Systems. - Atsushi Masubuchi; Masahiro Umehira; Xiaoyan Wang 003; Shigeki Takeda (WPMC, 2021)

Deep Reinforcement Learning based Usage Aware Spectrum Access Scheme. - Yuto Teraki; Xiaoyan Wang 003; Masahiro Umehira; Yusheng Ji (WPMC, 2021)

Antenna Element Space Interference Cancelling Radar for Angle Estimations of Multiple Targets. - Ran Sun; Junichirou Sakai; Kouhei Suzuki; Jiaying Zheng; Shigeki Takeda; Masahiro Umehira; Xiaoyan Wang 003; Hiroshi Kuroda (IEEE Access, 2021)

Wireless Access Control in Edge-Aided Disaster Response: A Deep Reinforcement Learning-Based Approach. - Hang Zhou; Xiaoyan Wang 003; Masahiro Umehira; Xianfu Chen; Celimuge Wu; Yusheng Ji (IEEE Access, 2021)

Reinforcement Learning for Joint Channel/Subframe Selection of LTE in the Unlicensed Spectrum. - Yuki Kishimoto; Xiaoyan Wang 003; Masahiro Umehira (Wirel. Commun. Mob. Comput., 2021)

Performance evaluation of antenna using the human body as an element. - Ryoki Kanematsu; Katsuyuki Fujii; Yasuyuki Okumura; Masahiro Umehira (GCCE, 2022)

Prototype development of VR based personal zone defense practice equipment. - Hiroki Honma; Yoshiaki Iida; Yasuyuki Okumura; Katsuyuki Fujii; Masahiro Umehira (LifeTech, 2022)

Deep reinforcement learning based secondary user transmit power control for underlay cognitive radio networks. - Kouhei Katou; Xiaoyan Wang 003; Masahiro Umehira; Yusheng Ji (RACS, 2022)

A Deep Reinforcement Learning based Analog Beamforming Approach in Downlink MISO Systems. - Hang Zhou; Xiaoyan Wang 003; Masahiro Umehira; Yusheng Ji (VTC Spring, 2022)

A Usage Aware Dynamic Spectrum Access Scheme for Interweave Cognitive Radio Network by Exploiting Deep Reinforcement Learning. - Xiaoyan Wang 003; Yuto Teraki; Masahiro Umehira; Hao Zhou 001; Yusheng Ji (Sensors, 2022)

OTFS and Delay Doppler Communications. - Y. Hong; Masahiro Umehira (APCC, 2023)

Radar-Communication Integration System based on PMCW Radar using Zadoff-Chu Sequence. - Masahiro Umehira; Katsuyuki Fujii; Yasuyuki Okumura (APCC, 2023)

Deep Reinforcement Learning-Based On-Off Analog Beamforming Coordination for Downlink MISO Networks. - Hang Zhou; Xiaoyan Wang 003; Masahiro Umehira; Yusheng Ji (DASC/PiCom/CBDCom/CyberSciTech, 2023)

Effect of Unmanned Aerial Vehicles for Electromagnetic Field Measurement on Near Field of High-frequency-Band Monopole Antennas. - Koki Ito; Katsuyuki Fujii; Yasuyuki Okumura; Masahiro Umehira (GCCE, 2023)

Quantitative Analysis of Bubble Cross-Sectional Area and Electrical Constants in a Phantom Using Ultrasonic Vibration. - Mizuho Kato; Katsuyuki Fujii; Yasuyuki Okumura; Masahiro Umehira (GCCE, 2023)

Orthogonal Subcarrier Division Multiplexing Using the Same Optical Wavelength. - Yusuke Mizutani; Yasuyuki Okumura; Masahiro Umehira; Katsuyuki Fujii (GCCE, 2023)

RNN-based Interference Suppression Method for CS radar: Simulation and Experimental Evaluations. - Ryoto Koizumi; Xiaoyan Wang 003; Masahiro Umehira; Shigeki Takeda; Ran Sun (ICAIIC, 2023)

Multi-radar interference experiment and performance evaluations on algorithm-based and learning-based schemes. - Ryoto Koizumi; Xiaoyan Wang 003; Masahiro Umehira (SoICT, 2023)

Split Learning Assisted Multi-UAV System for Image Classification Task. - Tingkai Sun; Xiaoyan Wang 003; Masahiro Umehira; Yusheng Ji (VTC2023-Spring, 2023)

Green Spectrum Sharing Framework in B5G Era by Exploiting Crowdsensing. - Xiaoyan Wang 003; Masahiro Umehira; Mina Akimoto; Biao Han; Hao Zhou 001 (IEEE Trans. Green Commun. Netw., 2023)

Experimental Evaluations on Learning-Based Inter-Radar Wideband Interference Mitigation Method. - Ryoto Koizumi; Xiaoyan Wang 003; Masahiro Umehira; Ran Sun; Shigeki Takeda (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2024)

Wideband Interference Suppression for Automotive mmWave CS Radar: From Algorithm-Based to Learning-Based Approaches. - Xiaoyan Wang 003; Ryoto Koizumi; Masahiro Umehira; Ran Sun; Shigeki Takeda (IEICE Trans. Commun., 2024)

Inter-radar Interference Mitigation via Self-attention Augmented biGRU and Customized Loss Functions. - Yudai Suzuki; Xiaoyan Wang 003; Masahiro Umehira; Hao Zhou 001 (ICNC, 2025)

DFTs-OFDM Radar using Zadoff-Chu Sequence for Radar-Communication Integration. - Masahiro Umehira; Yoshihiko Takeuchi (ICNC, 2025)