Takeo Fujii

ORCID

Publication Activity (10 Years)

Years Active: 1997-2024
Publications (10 Years): 226

Top Venues

Publications

Shusuke Narieda, Takeo Fujii
Characteristics of LoRaWAN with Energy Detection Based Carrier Sense. ICOIN (2024)
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
Adaptive Resource Allocation Utilizing Periodic Traffic and Clock Drift in LPWAN. IEEE Trans. Wirel. Commun. 23 (4) (2024)
Keisuke Kikuchi, Takeo Fujii
A Study of Communication Quality Estimation Methods for LTE Using Communication Indexces Considering Time Variability. ICOIN (2024)
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
LBT-Based Resource Allocation Methods Utilizing Periodicity of Traffic in LPWAN. ICNC (2024)
Shusuke Narieda, Takeo Fujii
Analyses of Hidden and Exposed Nodes in LPWAN with Energy Detection Based Carrier Sense. CCNC (2024)
Hayato Mukasa, Koshiro Aruga, Takeo Fujii, Koichi Adachi
Indoor Wireless Environment Visualization for Smart Factories. ICOIN (2024)
Taiga Kawaguchi, Osamu Takyu, Takeo Fujii
A Study on Estimation Method of Interference State during Frequency Sharing in 5G Cellular Systems. ICAIIC (2024)
Osamu Takyu, Keita Takeda, Ryuji Miyamoto, Koichi Adachi, Mai Ohta, Takeo Fujii
An Environment-Aware Adaptive Data-Gathering Method for Packet-Level Index Modulation in LPWA. Sensors 24 (8) (2024)
Shusuke Narieda, Takeo Fujii
Self-Tuning of Signal Detection Level for Energy Detection-Based Carrier Sense in Low-Power Wide-Area Networks. Sensors 24 (11) (2024)
Susumu Ishihara, Hiroshi Shigeno, Onur Altintas, Takeo Fujii, Raphaël Frank, Florian Klingler
Welcome Message. VNC (2024)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii, Koichi Adachi
Characterization of Discrimination of Number of Signal Collision Sensors Using Spectral Fluctuation Caused by Frequency Offset in Physical Wireless Parameter Conversion Sensor Networks. ICAIIC (2024)
Kosuke Suzuki, Koichi Adachi, Mai Ohta, Osamu Takyu, Takeo Fujii
Packet-Level Index Modulation Based on Channel Activity Detection. IEEE Trans. Wirel. Commun. 23 (4) (2024)
Shusuke Narieda, Takeo Fujii
On Execution at End Devices for Energy Detection Based Carrier Sense in LPWAN. CCNC (2024)
Koshiro Aruga, Takeo Fujii
MAC Protocol Adaptation Method in Coordination with Application. ICAIIC (2024)
Taro Miyamoto, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse
Measurement of Sub-GHz Band LPWA Radiowave Propagation on Each Floor in Indoor Environment. ICOIN (2023)
Hayato Mukasa, Takeo Fujii
Hidden Node Recognition Utilizing Wireless LAN Sensing Data in Indoor Environments. ICUFN (2023)
Shugo Hirano, Hirofumi Nakajo, Takeo Fujii
User Pairing Method Using Radio Map for Spectrum Sharing Between Non-Terrestrial Networks and Terrestrial Networks. WPMC (2023)
Keigo Saito, Takeo Fujii, Koji Ishibashi, Yu Shibata, Soma Toki, Hideki Endo
Packet Aggregation Utilizing Multi-Antenna Beamforming in IRDT Protocol. VTC Fall (2023)
Toshi Ito, Masafumi Oda, Osamu Takyu, Mai Ohta, Takeo Fujii, Koichi Adachi
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. Sensors 23 (6) (2023)
Shougo Matsuo, Sunao Miyamoto, Hirofumi Nakajo, Takeo Fujii
Beam Pattern Estimation of 5G Millimeter-Wave Base Station Based on Radio Map and Multi-Beam Antenna Model at 28GHz. ICOIN (2023)
Ying Gao, Takeo Fujii
A Kriging-Based Radio Environment Map Construction and Channel Estimation System in Threatening Environments. IEEE Access 11 (2023)
Shusuke Narieda, Takeo Fujii
Energy Detection Based Carrier Sense in LPWAN. IEEE Access 11 (2023)
Hirofumi Nakajo, Yusuke Itayama, Shougo Matsuo, Takeo Fujii
5D Spectrum Database. ICAIIC (2023)
Ryogo Oya, Shinichiro Kakuda, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi
Packet-Level Index Modulation Under Duty Cycle Constraints. WPMC (2023)
Shusuke Narieda, Takeo Fujii
Robustness to Digital Power Adjustment in Transmit Power Allocation for Poor Conditioned LPWA End Devices. ICOIN (2023)
Shusuke Narieda, Takeo Fujii
Spreading Factor Allocation for Extension of End Device Lifetime in LoRaWAN. WF-IoT (2023)
Ryuji Miyamoto, Osamu Takyu, Hiroshi Fujiwara, Koichi Adachi, Mai Ohta, Takeo Fujii
Data Gathering Method with High Accuracy of Environment Recognition Using Mathematical Optimization in Packet-Level Index Modulation. IEICE Trans. Commun. 106 (12) (2023)
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
Resource Allocation for Periodic Traffic in Wireless Sensor Network. WCNC (2023)
Sunao Miyamoto, Shota Yamada, Takeo Fujii
Height Pattern Estimation Method Using the Combination of Radio Map and 3D Map for Spectrum Sharing. ICOIN (2023)
Masafumi Oda, Osamu Takyu, Mai Ohta, Takeo Fujii, Koichi Adachi
Position Estimation of Radio Source Based on Fingerprinting With Physical Wireless Parameter Conversion Sensor Networks. IEEE Access 11 (2023)
Katsuya Suto, Shinsuke Bannai, Koya Sato, Takeo Fujii
Propagation Graph Representation Learning and Its Implementation in Direct Path Representation. WCNC (2023)
Daisuke Kumamoto, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse
Lower Bound for the Number of Accommodable End-devices in LPWAN with Multiple Interferences. ICOIN (2023)
Shota Yamada, Takeo Fujii, Katsuya Suto, Koya Sato
Observation Data and 3D Map-based Radio Environment Estimation for Drone Wireless Communications. ICUFN (2023)
Yusuke Itayama, Hirofumi Nakajo, Shougo Matsuo, Takeo Fujii
Measurement-based Spectrum Database for Non-Terrestrial Networks. ICOIN (2023)
Tetsuki Taniguchi, Takeo Fujii
Power Control in Local 5G/Beyond Systems Utilizing Spectrum Database and Monte Carlo Stochastic Programming. CCWC (2022)
Ying Gao, Takeo Fujii
An Improvement of Security Scheme for Radio Environment Map Under Massive Attacking. IEEE Access 10 (2022)
Osamu Takyu, Gaku Kobayashi, Koichi Adachi, Mai Ohta, Takeo Fujii
Estimation Based on Chirp Modulation for Desired and Interference Power and Channel Occupancy Ratio in LoRa. Sensors 22 (11) (2022)
Ying Gao, Takeo Fujii
Terminal Selection Based on Multi-armed Bandit under Threatening Environment for Radio Environment Map Construction. VTC Spring (2022)
Mai Ohta, Takeo Fujii
Differential Packet Level Index Modulation for Low Power Wide Area System. ICUFN (2022)
Keita Katagiri, Takeo Fujii
Classification and Discretization of Shadowing Toward Low Storage Radio Map. ICAIIC (2022)
Shusuke Narieda, Takeo Fujii
Characteristics of Transmit Power Allocation for Poor Conditioned End Devices in LPWAN with Peak Detection Based Carrier Sense. ICUFN (2022)
Keita Katagiri, Takeo Fujii
Partitioned Path Loss Models Based on Coefficient of Determination. ICOIN (2022)
Ryo Miyamoto, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse
Characteristics of RSSI Kriging Interpolated Value in Neighborhood of Buildings. ICUFN (2022)
Satoshi Nakaniida, Takeo Fujii
Throughput Prediction by Radio Environment Correlation Recognition Using Crowd Sensing and Federated Learning. ICAIIC (2022)
Toshi Ito, Osamu Takyu, Mai Ohta, Takeo Fujii, Koichi Adachi
High-Sensitivity Detection Method for Signals in PhyC-SN. ICUFN (2022)
Kohei Tsurumi, Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
Simple Clock Drift Estimation and Compensation for Packet-Level Index Modulation and Its Implementation in LoRaWAN. IEEE Internet Things J. 9 (16) (2022)
Ying Gao, Takeo Fujii
Kriging-based Trust Nodes Aided REM Construction under Threatening Environment. VTC Fall (2022)
Shougo Matsuo, Sunao Miyamoto, Keita Katagiri, Takeo Fujii
Radio Propagation Extrapolation by Using Multiple Separated Propagation Paths Estimated by Radio Map. ICOIN (2022)
Hirofumi Nakajo, Takeo Fujii
Blockage Prediction for Millimeter-wave Communications Based on People Flow Data. VTC Fall (2022)
Shusuke Narieda, Takeo Fujii
Transmit Power Allocation Schemes for Performance Improvement of Poor Conditioned End Devices in LPWAN. IEEE Access 10 (2022)
Ryuji Miyamoto, Osamu Takyu, Hiroshi Fujiwara, Koichi Adachi, Mai Ohta, Takeo Fujii
Performance Evaluation of Highly Efficient Information Collection Methods by Trend Analysis of Sensor Information Using Pre-learning. ICUFN (2022)
Noriyuki Oki, Atsuki Mukoda, Ayumu Ueda, Takeo Fujii
Device Adaptive Control Method Considering Power Consumption for Pedestrian-to-Infrastructure Communications. ICUFN (2022)
Natsuki Miyoshi, Tomoyuki Kawashima, Shusuke Narieda, Takeo Fujii, Hiroshi Naruse
Measurement of sub-GHz Band LPWA Propagation at Half-Wavelength Intervals. FNWF (2022)
Kosuke Suzuki, Koichi Adachi, Mai Ohta, Osamu Takyu, Takeo Fujii
Flexible Index Mapping Scheme for Packet-Level Index Modulation. IEEE Wirel. Commun. Lett. 11 (4) (2022)
Keita Katagiri, Koya Sato, Kei Inage, Takeo Fujii
Radio Map Extrapolation Using Compensated Empirical CDF Under Interference-Limited Observations. IEEE Access 10 (2022)
Muying Chen, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
Transmission Timing Control Using ACK Signal in LoRaWAN. WCNC (2021)
Keita Katagiri, Takeo Fujii
Mesh-Clustering-Based Radio Maps Construction for Autonomous Distributed Networks. ICUFN (2021)
Yuki Nishio, Osamu Takyu, Hayato Soya, Keiichiro Shirai, Mai Ohta, Takeo Fujii
Optimal Construction of Access Rate to Superior Channel in Rendezvous Channel Based on Channel-Occupancy Ratio. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (1) (2021)
Koichi Adachi, Kohei Tsurumi, Aoto Kaburaki, Osamu Takyu, Mai Ohta, Takeo Fujii
Packet-Level Index Modulation for LoRaWAN. IEEE Access 9 (2021)
Shinichiro Kakuda, Yudai Yamazaki, Keita Katagiri, Takeo Fujii, Osamu Takyu, Mai Ohta, Koichi Adachi
Channel Allocation for LoRaWanConsidering Intra-System and Inter-System Interferences. VTC Fall (2021)
Katsuya Suto, Shinsuke Bannai, Koya Sato, Kei Inage, Koichi Adachi, Takeo Fujii
Image-Driven Spatial Interpolation With Deep Learning for Radio Map Construction. IEEE Wirel. Commun. Lett. 10 (6) (2021)
Haesik Kim, Takeo Fujii, Kenta Umebayashi
Relay Nodes Selection Using Reinforcement Learning. ICAIIC (2021)
Koya Sato, Katsuya Suto, Kei Inage, Koichi Adachi, Takeo Fujii
Space-Frequency-Interpolated Radio Map. IEEE Trans. Veh. Technol. 70 (1) (2021)
Soraya Mitate, Yudai Yamazaki, Takeo Fujii, Shusuke Narieda
Wireless System Selection with Spectrum Database for IoT. ICOIN (2021)
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
Autonomous Decentralized Traffic Control Using Q-Learning in LPWAN. IEEE Access 9 (2021)
Hirofumi Nakajo, Takeo Fujii
Local 5G mmWave Signal Measurement and Analysis for Spectrum Database. ICUFN (2021)
Keita Katagiri, Takeo Fujii
Low Storage Radio Map Using Statistical Inference. DySPAN (2021)
Mai Ohta, Takeo Fujii
Intra-System Interference Avoidance for Packet-Level Index Modulation in Internet of Things. APSIPA ASC (2021)
Ying Gao, Takeo Fujii
Improvement of Radio Environment Map under Data Falsification Attack. VTC Fall (2021)
Keita Katagiri, Koya Sato, Kei Inage, Takeo Fujii
Dynamic Radio Map Using Statistical Hypothesis Testing. IEEE Trans. Cogn. Commun. Netw. 7 (3) (2021)
Arata Takahashi, Osamu Takyu, Hiroshi Fujiwara, Takeo Fujii, Tomoaki Ohtsuki
Overloaded Wireless MIMO Switching for Information Exchanging through Untrusted Relay in Secure Wireless Communication. IEICE Trans. Commun. (10) (2021)
Ryoma Yasutani, Koki Kitazumi, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse
Spatio-Temporal Analyses of Environmental Monitoring Based on Wireless Sensor Networks. IEEE SENSORS (2021)
Yoji Uesugi, Keita Katagiri, Koya Sato, Kei Inage, Takeo Fujii
Clustering for Signal Power Distribution Toward Low Storage Crowdsourced Spectrum Database. IEICE Trans. Commun. (10) (2021)
Gaku Kobayashi, Osamu Takyu, Koichi Adachi, Mai Ohta, Takeo Fujii
Proposal of interference power occupancy estimation method using chirp demodulation. ICUFN (2021)
Kohei Natsume, Mai Ohta, Koichi Adachi, Osamu Takyu, Takeo Fujii
DCT Compression Scheme for Wireless Sensor Information considering Spatial Correlation. ICOIN (2021)
Ayumu Ueda, Takeo Fujii
Packet Delivery Ratio Prediction for V2V Based on Radio Environment Map Considering Hidden Terminal Problem. Int. J. Intell. Transp. Syst. Res. 19 (1) (2021)
Kei Sakaguchi, Ryuichi Fukatsu, Tao Yu, Eisuke Fukuda, Kim Mahler, Robert W. Heath Jr., Takeo Fujii, Kazuaki Takahashi, Alexey Khoryaev, Satoshi Nagata, Takayuki Shimizu
Towards mmWave V2X in 5G and Beyond to Support Automated Driving. IEICE Trans. Commun. (6) (2021)
Taiki Matsushima, Takeo Fujii
Compensation Method of Received Signal Power observed by Smartphone for Crowdsensed Spectrum Database. APSIPA (2020)
Yudai Yamazaki, Takeo Fujii
Scheduling Algorithm Considering Interference Interval for LPWA. APSIPA (2020)
Kei Sakaguchi, Ryuichi Fukatsu, Tao Yu, Eisuke Fukuda, Kim Mahler, Robert W. Heath Jr., Takeo Fujii, Kazuaki Takahashi, Alexey Khoryaev, Satoshi Nagata, Takayuki Shimizu
Towards mmWave V2X in 5G and Beyond to Support Automated Driving. CoRR (2020)
Tetsuki Taniguchi, Takeo Fujii
Utilization of Spectrum Database for Power Control in Micro Operator Based Small Cell System by Two-Stage Stochastic Design. ISSPIT (2020)
Koya Sato, Kei Inage, Takeo Fujii
Radio Environment Map Construction with Joint Space-Frequency Interpolation. ICAIIC (2020)
Toshiki Nonaka, Takeo Fujii, Osamu Takyu, Mai Ohta
Adapting the number of replicas in the E-IRSA system using the power control. ICOIN (2020)
Gaku Kobayashi, Osamu Takyu, Koichi Adachi, Mai Ohta, Takeo Fujii
Estimation of Desired power and Undesired power Using Chirp Demodulation and Evaluation of Accuracy. APSIPA (2020)
Hang Liu, Xu Zhu, Takeo Fujii
Convolutional Neural Networks for Pilot-Induced Cyclostationarity Based OFDM Signals Spectrum Sensing in Full-Duplex Cognitive Radio. IEICE Trans. Commun. (1) (2020)
Keita Katagiri, Koya Sato, Kei Inage, Takeo Fujii
Experimental Verification of Shadowing Classification for Radio Map. VTC Fall (2020)
Ayumi Kaichi, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse
On Placement of End Devices in LPWAN Based WSN for Environmental Monitoring Applications. APSIPA (2020)
Aoto Kaburaki, Koichi Adachi, Osamu Takyu, Mai Ohta, Takeo Fujii
Autonomous Decentralized Transmission Timing Control in Wireless Sensor Network. APSIPA (2020)
Cong-Hoang Diem, Takeo Fujii
An UAV and Distributed STBC for Wireless Relay Networks in Search and Rescue Operations. INISCOM (2020)
Hiroki Ito, Takeo Fujii, Yasushi Yamao
Post-Reception Compensation Performance of Blind Nonlinear Compensator with Equalizer against Memory Nonlinear Distortion. VTC Fall (2020)
Shusuke Narieda, Takeo Fujii, Kenta Umebayashi
On Power Consumption of End Device in LoRa Networks with Listen Before Talk. ICOIN (2020)
Shusuke Narieda, Takeo Fujii, Kenta Umebayashi
Energy Constrained Optimization for Spreading Factor Allocation in LoRaWAN. Sensors 20 (16) (2020)
Shusuke Narieda, Daiki Cho, Hiromichi Ogasawara, Kenta Umebayashi, Takeo Fujii, Hiroshi Naruse
Theoretical Analyses of Maximum Cyclic Autocorrelation Selection Based Spectrum Sensing. IEICE Trans. Commun. (12) (2020)
Tetsuki Taniguchi, Takeo Fujii
Interference Management with Beamforming Utilizing Spectrum Database for Micro Operators. VTC Fall (2020)
Yu-Ki Hatada, Takeo Fujii
Receiver Beacon Transmission Interval Design Using Q-Learning focused on Packet Delivery Rate for Multi-Stage Wireless Sensor Networks. ICAIIC (2020)
Keita Katagiri, Takeo Fujii
Radio Environment Map Updating Procedure Considering Change of Surrounding Environment. WCNC Workshops (2020)
Keita Katagiri, Takeo Fujii
Measurement-based Spectrum Database for Wireless Distributed Networks Using Shadowing Classifier. ICAIIC (2020)
Hirotaka Senda, Osamu Takyu, Akinori Kamio, Mai Ohta, Takeo Fujii
Specification of Link Quality Degradation in WLAN based on MCS and Retransmission Flag. APSIPA (2020)
Kohei Natsume, Mai Ohta, Osamu Takyu, Takeo Fujii
Data Fusion Method Exploiting Data Correlation for Physical Wireless Parameter Conversion Sensor Networks. ICOIN (2020)
Kyosuke Fukuda, Osamu Takyu, Keiichiro Shirai, Takeo Fujii, Mai Ohta, Fumihito Sasamori, Sliiro Handa
Adaptive Transmission Control with Prediction of Sensing Results for PhyC-SN. RWS (2019)

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Publication Activity (10 Years)

Top Topics

Top Venues

Takeo Fujii