Frequency offset compensation with MMSE-MUD for multi-carrier CDMA in quasi-synchronous uplink. - Osamu Takyu; Tomoaki Ohtsuki; Masao Nakagawa (ICC, 2003)

Companding system with time clustering. - Osamu Takyu; Tomoaki Ohtsuki; Masao Nakagawa (PIMRC, 2004)

Criterion for Reducing Error Rate Degradation by Nonlinear Amplifier for Multicarrier Transmission. - Osamu Takyu; Tomoaki Ohtsuki; Masao Nakagawa (IEICE Trans. Commun., 2005)

Relay method of sending soft decided symbol in cooperative communication. - Yuki Fukuyama; Osamu Takyu; Koichi Adachi; Masao Nakagawa (Communication Systems and Networks, 2006)

IP Packet Loss Compensation Scheme with Bicast and Forwarding for Handover in Mobile Communications. - Masahiko Saito; Akihito Morimoto; Osamu Takyu; Masao Nakagawa (PIMRC, 2006)

Evaluation of Asymmetric TDD Systems Employing AMC and HARQ by Considering MCS Selection Errors. - Nandar Lynn; Osamu Takyu; Riaz Esmailzadeh; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

Companding System Based on Time Clustering for Reducing Peak Power of OFDM Symbol in Wireless Communications. - Osamu Takyu; Tomoaki Ohtsuki; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2006)

A Sign Selection Method of Orthogonal Variable Spreading Factor Code for Peak Power Reduction in Multi-Rate OFCDM Systems. - Osamu Takyu; Tomoaki Ohtsuki; Masao Nakagawa (IEICE Trans. Commun., 2006)

IFDM for Downlink Wireless Access Scheme and Performance Comparison to MC-CDM. - Osamu Takyu; Masao Nakagawa (PIMRC, 2007)

Relay Method of Sending Soft Decision Symbol Based on the Result of Error Detecting Code in Cooperative Communication. - Yuki Fukuyama; Osamu Takyu; Koichi Adachi; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Frequency rotation for suppressing path interference and achieving large frequency diversity in uplink IFDMA. - Osamu Takyu; Yohtaro Umeda; Masao Nakagawa (PIMRC, 2008)

Frequency Spectrum Rotation in Interleaved Frequency Division Multiplexing. - Osamu Takyu; Masao Nakagawa (IEICE Trans. Commun., 2008)

A study of cooperative communication with consideration of power loss caused by relay abortion. - Mayumi Suzuki; Osamu Takyu; Yohtaro Umeda (ISWCS, 2009)

Scattered Pilot Assisted Channel Estimation for IFDMA Uplink. - Takeo Yamasaki; Osamu Takyu; Yohtaro Umeda (IEICE Trans. Commun., 2009)

Frequency Rotation for Suppressing Multipath Interference and Achieving Large Frequency Diversity in Uplink IFDMA. - Osamu Takyu; Yohtaro Umeda; Masao Nakagawa (IEICE Trans. Commun., 2010)

Phase Rotation for Constructing Uniform Frequency Spectrum in IFDMA Communication. - Takeo Yamasaki; Osamu Takyu; Koichi Adachi; Yohtaro Umeda; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2010)

Low complexity cyclostationary feature detection method to compenstate cyclostationarity-degradation by guard interval insertion. - Hiroyoshi Yano; Osamu Takyu; Takeo Fujii; Tomoaki Ohtsuki (CrownCom, 2011)

On Physical Layer Simulation Model for 6-Axis Sensor Assisted VLC Based Positioning System. - Chinnapat Sertthin; Takeo Fujii; Osamu Takyu; Yohtaro Umeda; Tomoaki Ohtsuki (GLOBECOM, 2011)

A nearest transmitter classification method for VLC based positioning system. - Chinnapat Sertthin; Tomoaki Ohtsuki; Osamu Takyu; Takeo Fujii; Yohtaro Umeda (PIMRC, 2011)

Fundamental study on adaptive ACK link control for downloading based on TCP connection in mobile wireless communication. - Osamu Takyu; Yohsuke Seki; Takeo Yamasaki; Takeo Fujii; Yohtaro Umeda; Xiaoqiu Wang; Satoshi Konishi (PIMRC, 2011)

Performance for MAC Level Channel Capacity in Cognitive Radio with Carrier Sense Multiple Access and Transmitting Power Control. - Osamu Takyu; Takahiro Saiwai; Takeo Fujii; Yohtaro Umeda (VTC Fall, 2011)

An Autonomous Selective Cooperative ARQ Protocol for Hybrid Mobile Wireless Sensor Networks. - Nandar Lynn; Osamu Takyu; Koichi Adachi; Masao Nakagawa; Tomoaki Ohtsuki (J. Commun., 2011)

Power-amplifier-inserted transversal filter for application to pulse-density-modulation switching-mode transmitters. - Shota Fujioka; Michiaki Kojima; Hironori Izumi; Yohtaro Umeda; Osamu Takyu (ISCIT, 2012)

Theoretical analysis of resource block assignment based on PAPR in two base station cellular system. - Osamu Takyu; Yohtaro Umeda; Fumihito Sasamori; Shiro Handa (PIMRC, 2012)

Improved soft-output M-algorithm for differential encoded LDPC coded systems with multiple-symbol differential detection. - Yang Yu; Shiro Handa; Fumihito Sasamori; Osamu Takyu (PIMRC, 2012)

Optimal subcarrier assignment for single cell multiuser OFDM system. - Osamu Takyu; Yohtaro Umeda (RWS, 2012)

Double stage and combining detection for cyclo-stationary feature. - Osamu Takyu; Hiroyoshi Yano; Takeo Fujii; Tomoaki Ohtsuki (RWS, 2012)

Design and implementation of OFDM signal processing on PSoC microcontroller. - Kohei Hayashi; Fumihito Sasamori; Osamu Takyu; Shiro Handa (ICTC, 2013)

Adaptive control based on theoretical analysis in RC-OFDM systems. - Wataru Koike; Fumihito Sasamori; Osamu Takyu; Shiro Handa (ICTC, 2013)

Resource control for cognitive multi-hop network in traffic cross environment. - Shuta Kako; Takeo Fujii; Osamu Takyu (PerCom Workshops, 2013)

Adaptive Iterative Decoding of Finite-Length Differentially Encoded LDPC Coded Systems with Multiple-Symbol Differential Detection. - Yang Yu; Shiro Handa; Fumihito Sasamori; Osamu Takyu (IEICE Trans. Commun., 2013)

Physical layer network coding with multiple untrusted relays for physical layer security. - Kazuma Yamaguchi; Osamu Takyu; Tomoaki Ohtsuki; Fumihito Sasamori; Shiro Handa (APSIPA, 2014)

Learning assisted rendezvous channel in cognitive radio system. - Osamu Takyu; Takayuki Yamakita; Takeo Fujii; Fumihito Sasamori; Shiro Handa (ICCS, 2014)

Data tracking and effect of frequency offset to simultaneous collecting method for wireless sensor networks. - Ryo Myoenzono; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Sliiro Handa (ICTC, 2014)

Performance evaluation of acoustic OFDM with repetition coding. - Shigeru Sasano; Fumihito Sasamori; Osamu Takyu; Shiro Handa (ICTC, 2014)

Robustness against fading fluctuation in Hermite-symmetric subcarrier coding for OFDM systems. - Akira Toda; Fumihito Sasamori; Osamu Takyu; Shiro Handa (ICTC, 2014)

Secondary transmit beamformings for spectrum leasing in CRNs in the presence of eavesdropper. - Masahiro Endo; Tomoaki Ohtsuki; Takeo Fujii; Osamu Takyu (PIMRC, 2014)

Protocol analysis of signal detection for deriving minimum isolation distance for frequency recycling under WLAN. - Masayuki Goto; Osamu Takyu; Takeo Fujii; Fumihito Sasamori; Shiro Handa (RWS, 2014)

Effect of PAPR reduction to BS cooperation MIMO systems under multi-cell environment. - Ryo Myoenzono; Osamu Takyu; Fumihito Sasamori; Shiro Handa (RWS, 2014)

Resource Block Assignment to Reduce Peak to Average Power Ratio in Multi-User OFDM. - Osamu Takyu; Yohtaro Umeda; Fumihito Sasamori; Shiro Handa (IEICE Trans. Commun., 2014)

Dynamic Spectrum Sharing for OFDMA-Based Multi-hop Cognitive Radio Networks with Priority. - Shuta Kako; Takeo Fujii; Osamu Takyu (Wirel. Pers. Commun., 2014)

Performance evaluation of the physical layer security using artificial noise and relay station. - Junichi Kabeya; Osamu Takyu; Tomoaki Ohtsuki; Fumihito Sasamori; Shiro Handa (APSIPA, 2015)

Selection method of cluster head in wireless sensor networks of wireless physical conversion for spectrum sharing. - Shohei Fujii; Osamu Takyu; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa (ICTC, 2015)

Unifying of frequency channel for spectrum sharing in wireless sensor networks with star topology. - Takumi Kimura; Osamu Takyu; Fumihito Sasamori; Shiro Handa (ICTC, 2015)

Evaluation of information leak by robustness evaluation of countermeasure to disguised CSI in PLNC considering physical layer security. - Kengo Matsumoto; Osamu Takyu; Takeo Fujii; Tomoaki Ohtsuki; Fumihito Sasamori; Shiro Handa (RWS, 2015)

Joint Resource Allocation with Interference Constraint for Cognitive Multi-Hop Wireless Networks. - Shuta Kako; Osamu Takyu; Takeo Fujii (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2015)

Precise BER Analysis of Repetition Coded OFDM Systems over Time- and Frequency-Selective Rayleigh Fading Channels. - Fumihito Sasamori; Satoru Asada; Osamu Takyu; Shiro Handa (IEICE Trans. Commun., 2015)

Optimization of Learning Time for Learning-Assisted Rendezvous Channel in Cognitive Radio System. - Osamu Takyu; Takayuki Yamakita; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa (IEICE Trans. Commun., 2015)

Data Tracking and Effect of Frequency Offset to Simultaneous Collecting Method for Wireless Sensor Networks. - Ryo Myoenzono; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa (Int. J. Distributed Sens. Networks, 2015)

Fundamental study of decomposition based on heterogeneous sensing data in physical conversion sensor networks. - Minato Oriuchi; Osamu Takyu; Keiichiro Shirai; Fumihito Sasamori; Shiro Handa; Mai Ohta; Takeo Fujii (APSIPA, 2016)

Highly efficient environment aware wireless sensor network. - Takeo Fujii; Shunsuke Takegi; Taiki Nakayama; Mai Ohta; Osamu Takyu (CCNC, 2016)

Multi-target tracking based on features of sensing results and wireless parameters for physical wireless parameter conversion sensor networks. - Minato Oriuchi; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa (RWS, 2016)

Novel two-stage spectrum sensing for energy detection with FFT. - Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru (WCNC, 2016)

Performance evaluation of multi-target tracking for PhyC-SN. - Minato Oriuchi; Osamu Takyu; Keiichiro Shirai; Fumihito Sasamori; Shiro Handa; Takeo Fujii; Mai Ohta (WCNC Workshops, 2016)

Optimal impersonation of CSI for maximizing leaked information to untrusted relay in PLNC. - Osamu Takyu; Kengo Matsumoto; Tomoaki Ohtsuki; Takeo Fujii; Fumihito Sasamori; Shiro Handa (WCNC, 2016)

A study of monitoring system for radio leak with massive radio sensors. - Shunsuke Imai; Osamu Takyu; Fumihito Sasamori; Shiro Handa (APSIPA, 2017)

Multiband hierarchical ad hoc network with wireless environment recognition. - Toshiyuki Shizuoka; Osamu Takyu; Mai Ohta; Takeo Fujii (APSIPA, 2017)

Optimal cluster head selection and rotation of cognitive wireless sensor networks for simultaneous data gathering. - Shohei Fujii; Osamu Takyu; Fumihito Sasamori; Shiro Handa; Takeo Fujii; Mai Ohta (ICOIN, 2017)

Optimization of multi-channel access in learning assisted measurement of channel occupancy ratio by USRP. - Takumi Kimura; Osamu Takyu; Fumihito Sasamori; Shiro Handa; Takeo Fujii; Mai Ohta (ICOIN, 2017)

Spectrum edge decision method for energy detection with FFT. - Mai Ohta; Makoto Taromaru; Takeo Fujii; Osamu Takyu (ICOIN, 2017)

Performance evaluation of M-ary SS/OFDM systems with short spread spectrum codes over visible light channels. - Qirui Xia; Fumihito Sasamori; Shiro Handa; Osamu Takyu (ICTC, 2017)

Multiple information collection with frequency offset compensation by utilizing physical wireless parameter conversion sensor network (PHY-C SN). - Koji Kakinuma; Takeo Fujii; Osamu Takyu; Mai Ohta (ICUFN, 2017)

Robust channel selection method under home electronics-derived electromagnetic wave interference. - Mai Ohta; Osamu Takyu; Takeo Fujii; Makoto Taromaru (ICUFN, 2017)

Secure Channel Selection Using Multi-Armed Bandit Algorithm in Cognitive Radio Network. - Masahiro Endo; Tomoaki Ohtsuki; Takeo Fujii; Osamu Takyu (VTC Spring, 2017)

Control Signal Transmission Based on IFDMA and Receiver with Nonlinear Amplifier for Compensating Access Channel Mismatch. - Ryo Kurosawa; Osamu Takyu; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (VTC Fall, 2017)

Data Tracking Using Frequency Offset and SIC for Physical Wireless Conversion Sensor Networks. - Takehiro Sakai; Osamu Takyu; Keiichiro Shirai; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (WCNC Workshops, 2017)

Measurement Technique for Occupancy Ratio and Transition Ratio in Cognitive Radio System. - Hayato Soya; Osamu Takyu; Keiichiro Shirai; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (WCNC Workshops, 2017)

Fusion Center Controlled MAC Protocol for Physical Wireless Parameter Conversion Sensor Networks (PHY-C SN). - Koji Kakinuma; Mai Ohta; Osamu Takyu; Takeo Fujii (IEICE Trans. Commun., 2017)

Optimal cluster head selection and rotation of cognitive wireless sensor networks for simultaneous data gathering and long life system. - Osamu Takyu; Shohei Fujii; Youhei Akimoto; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (Int. J. Distributed Sens. Networks, 2017)

Data Separation Technique using Spatial Correlation of Sensing Results for Physical Wireless Parameter Conversion Sensor Networks. - Naoya Amano; Osamu Takyu; Keiichiro Shirai; Fumihito Sasamori; Shiro Handa (APSIPA, 2018)

Experimental Evaluation of Interference Robustness for Frequency Spectrum Sharing in WLAN Systems. - Hironori Godo; Osamu Takyu; Koichi Adachi; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (APSIPA, 2018)

A Signal Separation Method for Physical Wireless Parameter Conversion Sensor Networks Using K-Shortest Path. - Shuhei Yamasaki; Minato Oriuchi; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa (APSIPA, 2018)

Experimental study of signaling with IFDMA modulation and nonlinear amplifying for recovering access channel mismatch. - Ryo Kurosawa; Osamu Takyu; Fumihito Sasamori; Shiro Handa; Mai Ohta; Takeo Fujii (ICOIN, 2018)

Transmit control for secure information sharing in untrusted relay with two antennas. - Tetsuya Noguchi; Osamu Takyu; Fumihito Sasamori; Shiro Handa; Takeo Fujii; Tomoaki Ohtsuki (ICOIN, 2018)

Modified rendezvous scheme with inferring access channel probability of slave by master. - Hayato Soya; Osamu Takyu; Keiichiro Shirai; Fumihito Sasamori; Shiro Handa; Mai Ohta; Takeo Fujii (ICOIN, 2018)

Secure information sharing with mirroring null steering through untrusted relay with two antennas. - Tetsuya Noguchi; Osamu Takyu; Takeo Fujii; Tomoaki Ohtsuki; Fumihito Sasamori; Shiro Handa (RWS, 2018)

Consideration of security for PLNC with untrusted relay in game theoretic perspective. - Yusuke Shirasaki; Osamu Takyu; Takeo Fujii; Tomoaki Ohtsuki; Fumihito Sasamori; Shiro Handa (RWS, 2018)

Measurement Experiments on 920 MHz Band for Spectrum Sharing with LoRaWAN. - Mai Ohta; Koichi Adachi; Naoki Aihara; Osamu Takyu; Takeo Fujii; Makoto Taromaru (VTC Fall, 2018)

Channel assignment based on predictions of sensing result and channel occupancy rate in PhyC-SN. - Osamu Takyu; Shohei Fujii; Fumihito Sasamori; Shiro Handa; Mai Ohta; Takeo Fujii (WCNC, 2018)

Transmit control and data separation in physical wireless parameter conversion sensor networks with event driven sensors. - Kyosuke Fukuda; Osamu Takyu; Keiichiro Shirai; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (WiSNet, 2018)

Fast Rendezvous Scheme with a Few Control Signals for Multi-Channel Cognitive Radio. - Hayato Soya; Osamu Takyu; Keiichiro Shirai; Mai Ohta; Takeo Fujii; Fumihito Sasamori; Shiro Handa (IEICE Trans. Commun., 2018)

Clustering Transmission Opportunity Length (CTOL) Model over Cognitive Radio Network. - Mas Haslinda Mohamad; Aduwati Sali; Fazirulhisyam Hashim; Rosdiadee Nordin; Osamu Takyu (Sensors, 2018)

Recognition and Countermeasure to Hidden Terminal Problem by Packet Analysis in Wireless LAN. - Akinori Kamio; Fumihito Sasamori; Shiro Handa; Osamu Takyu; Mai Ohta; Takeo Fujii (APSIPA, 2019)

Access Decision based on Secure Capacity for prevention to CSI Impersonation of Untrusted Relay. - Ryota Sugimoto; Osamu Takyu (APSIPA, 2019)

Performance Evaluation of Information-Sharing Scheme Among Multiple Destinations with Mirroring Null Steering in Single Antenna Networks. - Tetsuya Noguchi; Osamu Takyu; Takeo Fujii; Tomoaki Ohtsuki (ICOIN, 2019)

Network MIMO with Interference Cancellation for Cloud-Cooperated Wireless Sensor Networks. - Toshiki Nonaka; Takeo Fujii; Osamu Takyu; Mai Ohta (ICOIN, 2019)

Data Separation Considering Smoothness of Sensing Data in Physical Wireless Parameter Conversion Sensor Networks. - Shuhei Yamasaki; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Shiro Handa (ICOIN, 2019)

Optimal Channel Selection Rate of Slave Terminal for Rendezvous Channel Scheme based on Channel Occupancy Rate. - Yuki Nishio; Osamu Takyu; Hayato Soya; Mai Ohta; Takeo Fujii (ICUFN, 2019)

Overloaded Wireless MIMO Switching for Secure Wireless Communication Exchanging to Untrusted Relay. - Arata Takahashi; Fumihito Sasamori; Shiro Handa; Osamu Takyu; Takeo Fujii; Tomoaki Ohtsuki (ICUFN, 2019)

Spectrum Sharing Exploiting Spectrum Database for LPWA. - Yudai Yamazaki; Takeo Fujii; Osamu Takyu; Mai Ohta; Koichi Adachi (ICUFN, 2019)

Adaptive Transmission Control with Prediction of Sensing Results for PhyC-SN. - Kyosuke Fukuda; Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta; Fumihito Sasamori; Sliiro Handa (RWS, 2019)

Q-Learning Aided Resource Allocation and Environment Recognition in LoRaWAN With CSMA/CA. - Naoki Aihara; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Access, 2019)

Adaptive Channel Assignment With Predictions of Sensor Results and Channel Occupancy Ratio in PhyC-SN. - Osamu Takyu; Keiichiro Shirai; Takeo Fujii; Mai Ohta (IEEE Access, 2019)

ID Insertion and Data Tracking with Frequency Offset for Physical Wireless Parameter Conversion Sensor Networks. - Osamu Takyu; Keiichiro Shirai; Mai Ohta; Takeo Fujii (Sensors, 2019)

Autonomous Decentralized Transmission Timing Control in Wireless Sensor Network. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (APSIPA, 2020)

Estimation of Desired power and Undesired power Using Chirp Demodulation and Evaluation of Accuracy. - Gaku Kobayashi; Osamu Takyu; Koichi Adachi; Mai Ohta; Takeo Fujii (APSIPA, 2020)

Specification of Link Quality Degradation in WLAN based on MCS and Retransmission Flag. - Hirotaka Senda; Osamu Takyu; Akinori Kamio; Mai Ohta; Takeo Fujii (APSIPA, 2020)

Data Fusion Method Exploiting Data Correlation for Physical Wireless Parameter Conversion Sensor Networks. - Kohei Natsume; Mai Ohta; Osamu Takyu; Takeo Fujii (ICOIN, 2020)

Adapting the number of replicas in the E-IRSA system using the power control. - Toshiki Nonaka; Takeo Fujii; Osamu Takyu; Mai Ohta (ICOIN, 2020)

Verification of Interference Estimation by a Radio Sensor Considering Detection Sensitivity for Dynamic Spectrum Access in Spatial White Space. - Tsuyoshi Kobayashi; Kenichiro Yamamoto; Osamu Takyu; Yasushi Fuwa (ICTC, 2020)

Construction of Selection-Scheduling of Accessing Node for High Efficiency Information Exchanging in Overloaded Wireless MIMO Switching. - Arata Takahashi; Osamu Takyu; Hiroshi Fujiwara (ICTC, 2020)

Highly Efficient Data Gathering with Tendency Prediction based on Position Information of Event in Wireless Sensor Networks. - Osamu Takyu; Ryota Sugimoto (APSIPA ASC, 2021)

DCT Compression Scheme for Wireless Sensor Information considering Spatial Correlation. - Kohei Natsume; Mai Ohta; Koichi Adachi; Osamu Takyu; Takeo Fujii (ICOIN, 2021)

Performance Evaluation of Efficient Collection Method of Sensor Information in Wireless Sensor Networks for Event Detection. - Taiki Suehiro; Tsuyoshi Kobayashi; Osamu Takyu; Yasushi Fuwa (ICTC, 2021)

Actual Machine Experiment of Efficient Collection Method of Sensor Information in Wireless Sensors Network for Event Detection. - Taiki Suehiro; Tsuyoshi Kobayashi; Osamu Takyu; Yasushi Fuwa (ICTC, 2021)

Examination of efficient aggregation method of sensor information by wireless sensor network for event detection in frequency sharing. - Tsuyoshi Kobayashi; Taiki Suehiro; Osamu Takyu; Yasushi Fuwa (ICUFN, 2021)

Proposal of interference power occupancy estimation method using chirp demodulation. - Gaku Kobayashi; Osamu Takyu; Koichi Adachi; Mai Ohta; Takeo Fujii (ICUFN, 2021)

Channel Capacity for a Model of Packet Level Index Modulation in LPWA Networks. - Riku Yamabe; Mikihiko Nishiara; Osamu Takyu (ICUFN, 2021)

Channel Allocation for LoRaWanConsidering Intra-System and Inter-System Interferences. - Shinichiro Kakuda; Yudai Yamazaki; Keita Katagiri; Takeo Fujii; Osamu Takyu; Mai Ohta; Koichi Adachi (VTC Fall, 2021)

Transmission Timing Control Using ACK Signal in LoRaWAN. - Muying Chen; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (WCNC, 2021)

Packet-Level Index Modulation for LoRaWAN. - Koichi Adachi; Kohei Tsurumi; Aoto Kaburaki; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Access, 2021)

Autonomous Decentralized Traffic Control Using Q-Learning in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Access, 2021)

Achievable Rate Enhancement Based on Multi-Packet Indexing in Packet-Level Index Modulation. - Riku Yamabe; Mikihiko Nishiara; Osamu Takyu; Koichi Adachi (IEEE Access, 2021)

Optimal Construction of Access Rate to Superior Channel in Rendezvous Channel Based on Channel-Occupancy Ratio. - Yuki Nishio; Osamu Takyu; Hayato Soya; Keiichiro Shirai; Mai Ohta; Takeo Fujii (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2021)

Overloaded Wireless MIMO Switching for Information Exchanging through Untrusted Relay in Secure Wireless Communication. - Arata Takahashi; Osamu Takyu; Hiroshi Fujiwara; Takeo Fujii; Tomoaki Ohtsuki (IEICE Trans. Commun., 2021)

Spatial Compression of Sensing Information for Exploiting the Vacant Frequency Resource Using Radio Sensors. - Kenichiro Yamamoto; Osamu Takyu; Keiichiro Shirai; Yasushi Fuwa (IEICE Trans. Commun., 2021)

High-Sensitivity Detection Method for Signals in PhyC-SN. - Toshi Ito; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (ICUFN, 2022)

Performance Evaluation of Highly Efficient Information Collection Methods by Trend Analysis of Sensor Information Using Pre-learning. - Ryuji Miyamoto; Osamu Takyu; Hiroshi Fujiwara; Koichi Adachi; Mai Ohta; Takeo Fujii (ICUFN, 2022)

Simple Clock Drift Estimation and Compensation for Packet-Level Index Modulation and Its Implementation in LoRaWAN. - Kohei Tsurumi; Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Internet Things J., 2022)

Estimation Based on Chirp Modulation for Desired and Interference Power and Channel Occupancy Ratio in LoRa. - Osamu Takyu; Gaku Kobayashi; Koichi Adachi; Mai Ohta; Takeo Fujii (Sensors, 2022)

Flexible Index Mapping Scheme for Packet-Level Index Modulation. - Kosuke Suzuki; Koichi Adachi; Mai Ohta; Osamu Takyu; Takeo Fujii (IEEE Wirel. Commun. Lett., 2022)

Implementation of PLIM on 429MHz LoRa/FSK with improved conversion table. - Keita Takeda; Ryuji Miyamoto; Osamu Takyu (APSIPA ASC, 2023)

Water Level Monitoring System based on 429MHz LoRa with Packet Level Index Modulation. - Yudai Koike; Osamu Takyu (ICUFN, 2023)

Radio Sensor Detection of Interference to Satellite Earth Station in Frequency Spectrum Sharing. - Takatoshi Obata; Osamu Takyu (ICUFN, 2023)

Resource Allocation for Periodic Traffic in Wireless Sensor Network. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (WCNC, 2023)

Packet-Level Index Modulation Under Duty Cycle Constraints. - Ryogo Oya; Shinichiro Kakuda; Takeo Fujii; Osamu Takyu; Mai Ohta; Koichi Adachi (WPMC, 2023)

Position Estimation of Radio Source Based on Fingerprinting With Physical Wireless Parameter Conversion Sensor Networks. - Masafumi Oda; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (IEEE Access, 2023)

Three Level Recognition Based on the Average of the Phase Differences in Physical Wireless Parameter Conversion Sensor Networks and Its Effect to Localization with RSSI. - Toshi Ito; Masafumi Oda; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (Sensors, 2023)

Data Gathering Scheme for Event Detection and Recognition in Low Power Wide Area Networks. - Taiki Suehiro; Tsuyoshi Kobayashi; Osamu Takyu; Yasushi Fuwa (IEICE Trans. Commun., 2023)

Data Gathering Method with High Accuracy of Environment Recognition Using Mathematical Optimization in Packet-Level Index Modulation. - Ryuji Miyamoto; Osamu Takyu; Hiroshi Fujiwara; Koichi Adachi; Mai Ohta; Takeo Fujii (IEICE Trans. Commun., 2023)

Observation of the Terrestrial Radio Environment Using the Low Earth Orbit Satellite Constellation. - Takatoshi Obata; Osamu Takyu; Kei Inage; Takeo Fujii; Kohei Yoshida; Masayuki Ariyoshi (APSIPA, 2024)

Characterization of Discrimination of Number of Signal Collision Sensors Using Spectral Fluctuation Caused by Frequency Offset in Physical Wireless Parameter Conversion Sensor Networks. - Toshi Ito; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (ICAIIC, 2024)

Shared Decision Making Using Distribution Estimation of Same Frequency Interference in 5G. - Taiga Kawaguchi; Osamu Takyu (ICAIIC, 2024)

A Study on Estimation Method of Interference State during Frequency Sharing in 5G Cellular Systems. - Taiga Kawaguchi; Osamu Takyu; Takeo Fujii (ICAIIC, 2024)

LBT-Based Resource Allocation Methods Utilizing Periodicity of Traffic in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (ICNC, 2024)

A Study on Non-Orthogonal Multiple Access with Stored Device-to-Device Communication in Cellular Systems. - Masahiro Mizuno; Osamu Takyu (ICOIN, 2024)

Characterization of Iterative PLIM for Environmental Observations and Transmission Design. - Yu Fujimoto; Osamu Takyu (ICTC, 2024)

Novel Environmental Recognition Scheme with Mobile Data Gathering Station in Physical Wireless Parameter Conversion Sensor Networks. - Toshi Ito; Osamu Takyu; Mai Ohta; Takeo Fujii; Koichi Adachi (VTC Fall, 2024)

Received Signal Aided Implicit Node Clustering in LPWAN. - Takahiro Saraya; Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Takeo Fujii; Mai Ohta (VTC Spring, 2024)

An Environment-Aware Adaptive Data-Gathering Method for Packet-Level Index Modulation in LPWA. - Osamu Takyu; Keita Takeda; Ryuji Miyamoto; Koichi Adachi; Mai Ohta; Takeo Fujii (Sensors, 2024)

Adaptive Resource Allocation Utilizing Periodic Traffic and Clock Drift in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu; Mai Ohta; Takeo Fujii (IEEE Trans. Wirel. Commun., 2024)

Packet-Level Index Modulation Based on Channel Activity Detection. - Kosuke Suzuki; Koichi Adachi; Mai Ohta; Osamu Takyu; Takeo Fujii (IEEE Trans. Wirel. Commun., 2024)

Information-Intensive Control Method Using Estimated Observation Values Based on Correlation of Observation Values from Multiple Sensors. - Yudai Koike; Osamu Takyu (ICAIIC, 2025)

Improvement of Terrestrial Radio Environment Measurement Methods Using Satellite Constellations. - Takatoshi Obata; Osamu Takyu; Kei Inage; Takeo Fujii; Kohei Yoshida; Masayuki Ariyoshi (ICOIN, 2025)

Tackling Hidden Node Problem Utilizing Traffic Periodicity and Downlink Carrier Sense in LPWAN. - Aoto Kaburaki; Koichi Adachi; Osamu Takyu (IEEE Internet Things J., 2025)