Multicarrier assignment with random pulse for multicarrier high speed decentralized wireless LAN. - Takeo Fujii; Hiroyuki Atarashi; Masao Nakagawa (PIMRC, 1997)

Indoor multi-base stations system with simultaneous transmission using OFDM adaptive array antenna. - Takeo Fujii; Masao Nakagawa (PIMRC, 2000)

Weight tracking method for OFDM adaptive array in time variant fading channel. - T. Hiramoto; A. Mizuki; Masaki Shibahara; Takeo Fujii; Iwao Sasase (MWCN, 2002)

Communication using reflective wave on HAPS. - S. Horikawa; Masao Nakagawa; Takeo Fujii (MWCN, 2002)

Space time transmit site diversity for OFDM multi base station system. - Manabu Inoue; Masao Nakagawa; Takeo Fujii (MWCN, 2002)

Clustered assign code selecting peak power reduction for MC-CDMA. - Takeo Fujii; Masao Nakagawa (PIMRC, 2002)

Code selecting peak power reduction for MC-CDMA. - Takeo Fujii; Masao Nakagawa (WCNC, 2002)

Adaptive Clipping Level Control for OFDM Peak Power Reduction Using Clipping and Filtering. - Takeo Fujii; Masao Nakagawa (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2002)

Performance evaluation of adaptive co-channel interference canceling receiver using frequency spread coding and frequency interleaving for OFDM systems. - Masaki Shibahara; Takeo Fujii; Iwao Sasase; Takahiko Saba (Eur. Trans. Telecommun., 2003)

Multi-stage RLS subcarrier combining method for up-link quasi-synchronous MC- CDMA. - Takeo Fujii; Yukihiro Kamiya; Yasuo Suzuki (PIMRC, 2004)

STBC Site Diversity Using Layered Code Assignment for Multicarrier CDMA in MULTI-CELL System. - Takeo Fujii; Yukihiro Kamiya; Yasuo Suzuki (PIMRC, 2005)

Frequency Sharing Hotspot Communication using OFDM Adaptive Array Antenna under Uplink Multi-Carrier CDMA Cellular System. - Nguyen Tran Khoa; Takeo Fujii; Yukihiro Kamiya; Yasuo Suzuki (ISWCS, 2006)

Multi-Band Ad-Hoc Cognitive Radio for Reducing Inter System Interference. - Takeo Fujii; Yukihiro Kamiya; Yasuo Suzuki (PIMRC, 2006)

Forward Interference Avoidance Concept for Manet Using Adaptive Array Antennas. - Tomofumi Sakaguchi; Yukihiro Kamiya; Takeo Fujii; Yasuo Suzuki (PIMRC, 2006)

Multi-Stage RLS OFDM Adaptive Array Antenna with Short Pilot Symbols. - Takeo Fujii; Yukihiro Kamiya; Yasuo Suzuki (IEICE Trans. Commun., 2006)

Power Limited Multi-band Multi-hop Secondary Communication System for Cognitive Radio Network. - Takeo Fujii (CrownCom, 2007)

Cognitive Temporary Bypassing for Reliable Transmission in Wireless Ad Hoc Networks. - Yasushi Yamao; Kenichi Nagao; Takeo Fujii (ISWCS, 2007)

Multi Antenna Utilization Scheme for Congestion Avoidance Around the Gateway for Wireless Mesh Networks. - Norihiko Sato; Takeo Fujii (PIMRC, 2007)

Study on Cooperative Sensing in Cognitive Radio based AD-HOC Network. - Hiromasa Uchiyama; Kenta Umebayashi; Yukihiro Kamiya; Yasuo Suzuki; Takeo Fujii; Fumie Ono; Kei Sakaguchi (PIMRC, 2007)

STBC Distributed ARQ Scheme for OFDM Ad-Hoc Wireless Networks. - Takeo Fujii; Erina Kojima; Yukihiro Kamiya; Yasuo Suzuki (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2007)

Multistage RLS Subcarrier-Combining Method for Uplink Quasi-Synchronous MC-CDMA. - Takeo Fujii; Yukihiro Kamiya; Yasuo Suzuki (IEEE Trans. Veh. Technol., 2007)

Frequency Sharing Secondary System with Carrier Sense Assisted by Cellular System. - Anwida Prompijit; Chinnapat Sertthin; Masao Nakagawa; Takeo Fujii (CrownCom, 2008)

High Contribution Node Selection Method for STBC Distributed ARQ. - Takeo Fujii (VTC Spring, 2008)

Dialogue-Based Broadcasting Protocol for Wireless Ad Hoc Networks. - Keigo Hasegawa; Takeo Fujii; Kenta Umebayashi; Yukihiro Kamiya; Yasuo Suzuki (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

A New Blind Adaptive Array Antenna Based on CMA Criteria for M-Ary/SS Signals Suitable for Software Defined Radio Architecture. - Miho Kozuma; Atsushi Sasaki; Yukihiro Kamiya; Takeo Fujii; Kenta Umebayashi; Yasuo Suzuki (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2008)

Forward Interference Avoidance in Ad Hoc Communications Using Adaptive Array Antennas. - Tomofumi Sakaguchi; Yukihiro Kamiya; Takeo Fujii; Yasuo Suzuki (IEICE Trans. Commun., 2008)

A New Blind 2D-RAKE Receiver Based on CMA Criteria for Spread Spectrum Systems Suitable for Software Defined Radio Architecture. - Kei Takayama; Yukihiro Kamiya; Takeo Fujii; Yasuo Suzuki (IEICE Trans. Commun., 2008)

Study on Soft Decision Based Cooperative Sensing for Cognitive Radio Networks. - Hiromasa Uchiyama; Kenta Umebayashi; Takeo Fujii; Fumie Ono; Kei Sakaguchi; Yukihiro Kamiya; Yasuo Suzuki (IEICE Trans. Commun., 2008)

Frequency sharing hotspot communication under uplink multi-carrier CDMA cellular system. - Nguyen Tran Khoa; Takeo Fujii; Kenta Umebayashi; Yukihiro Kamiya; Yasuo Suzuki (Wirel. Commun. Mob. Comput., 2008)

A MAC Protocol for Multi-Packet Ad-Hoc Wireless Network Utilizing Multi-Antenna. - Norihiko Sato; Takeo Fujii (CCNC, 2009)

A cooperative sensing area expansion using orthogonal frequency based information collection method. - Mai Ohta; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (CrownCom, 2009)

Multi-cell Interference Reduction Packet Control for Improving Cell Boundary Throughput for Multi-hop Cellular System. - Yuji Okamoto; Takeo Fujii (INCoS, 2009)

A novel spectrum sensing method using multi-antennas without channel state information. - AbdulRahman Al-Abbasi; Takeo Fujii (ISWCS, 2009)

Multiband received signal strength fingerprint based location system. - Chinnapat Sertthin; Takeo Fujii; Masao Nakagawa (PIMRC, 2009)

Dynamic subcarrier controlled TDMA/OFDM multi-hop wireless network for improving end to end throughput. - Takeo Fujii (WCNC, 2009)

Experiment on Synchronous Timing Signal Detection from ISDB-T Terrestrial Digital TV Signal with Application to Autonomous Distributed ITS-IVC Network. - Yoshio Karasawa; Taichi Kumagai; Atsushi Takemoto; Takeo Fujii; Kenji Ito; Noriyoshi Suzuki (IEICE Trans. Commun., 2009)

A Robust Spectrum Sensing Method Based on Maximum Cyclic Autocorrelation Selection for Dynamic Spectrum Access. - Kazushi Muraoka; Masayuki Ariyoshi; Takeo Fujii (IEICE Trans. Commun., 2009)

A Novel Method for Information Gathering by Using Orthogonal Narrowband Signal for Cooperative Sensing in Cognitive Radio. - Mai Ohta; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (IEICE Trans. Commun., 2009)

Resource Allocation Method for OFDM System to Transmit SVC over Frequency Selective Channel. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (AICT, 2010)

An Unequal Protection Method for Multiuser OFDM to Minimize Video Distortion. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (AICT, 2010)

A Novel Routing Scheme with High Sensitive Sensing for Multi Hop Wireless Mesh Network. - Shamsad Parvin; Takeo Fujii (INCoS, 2010)

STBC cooperative relay for packet broadcasting. - Yueting Hu; Takeo Fujii (ISWCS, 2010)

Outlier detection methods of low SNR nodes for cooperative spectrum sensing. - Hung Vu Le; Mai Ohta; Kei Inage; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (ISWCS, 2010)

Joint cross-layer resource allocation and interference avoidance with QoS support for multiuser cognitive radio systems. - Hailan Peng; Takeo Fujii (ISWCS, 2010)

Sub-band pre-channel compensation-at RS for MC-CDMA downlink relay system. - Haiyan Zheng; Hailan Peng; Takeo Fujii (ISWCS, 2010)

A Novel Blind Diversity Detection Scheme for Multi-Antenna Cognitive Radio Spectrum Sensing. - AbdulRahman Al-Abbasi; Takeo Fujii (VTC Fall, 2010)

Multi-Antenna Utilization Scheme to Prevent Packet Congestion in Wireless Mesh Networks. - Norihiko Sato; Takeo Fujii (IEICE Trans. Commun., 2010)

Multi-Band Received Signal Strength Fingerprinting Based Indoor Location System. - Chinnapat Sertthin; Takeo Fujii; Tomoaki Ohtsuki; Masao Nakagawa (IEICE Trans. Commun., 2010)

Power control schemes for spectrum sharing based on capacity conservation ratio in Rayleigh fading channel. - Kei Inage; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (CCNC, 2011)

A novel power controlled sensing information gathering for cooperative sensing on shared spectrum with primary spectrum. - Mai Ohta; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (CrownCom, 2011)

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

Adaptive modulation method for MGS video streaming. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (EUVIP, 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)

Q-learning Based p-pesistent CSMA MAC Protcol for Secondary User of Cognitive Radio Networks. - Sarenna Bao; Takeo Fujii (INCoS, 2011)

Multi-cell shared multi-user MIMO relay for broadband cellular systems. - Kensuke Fujii; Takeo Fujii (ISWCS, 2011)

A novel spectrum aware routing scheme for multi-hop cognitive radio mesh networks. - Shamsad Parvin; Takeo Fujii (PIMRC, 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)

White space vectors for channel selection in vehicular cognitive networks. - Kei Inage; SeonNyeon Lee; Takeo Fujii; Onur Altintas (VNC, 2011)

Demonstration of Vehicle to Vehicle Communications over TV White Space. - Onur Altintas; Mitsuhiro Nishibori; Takuro Oshida; Chikara Yoshimura; Youhei Fujii; Kota Nishida; Yutaka Ihara; Masahiro Saito; Kazuya Tsukamoto; Masato Tsuru 001; Yuji Oie; Rama Vuyyuru; et al. (VTC Fall, 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)

Hidden node aware routing method using high-sensitive sensing device for multi-hop wireless mesh network. - Shamsad Parvin; Takeo Fujii (EURASIP J. Wirel. Commun. Netw., 2011)

Multi-User Scheduling Method Considering Fairness and Mitigation of Multi-Cell Interference for Multi-Hop Cellular System. - Yuji Okamoto; Takeo Fujii (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2011)

A novel reliable broadcasting scheme under cognitive radio environment based on erasure correctable codes. - Arash Asareh; Takeo Fujii (ICNC, 2012)

Real time information gathering based on frequency and timing assignment for wireless sensor networks. - Tomomi Endo; Takeo Fujii (ICCS, 2012)

OFDMA resource allocation for multicasting videos to users with diverse screen sizes. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (ICCS, 2012)

Multi-cell shared multi-user MIMO relay with user pairing control. - Takeo Fujii; Yuto Houmura (ICUFN, 2012)

Performance evaluation model with cost of relay for multi-cell cooperative multi-hop cellular system. - Naoki Onda; Takeo Fujii (PIMRC, 2012)

Radio environment aware stable routing for multi-hop cognitive radio networks. - Shamsad Parvin; Takeo Fujii (PIMRC, 2012)

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

Channel Selection Statistics for Control Information Sharing within Cognitive Radio Networks. - Mai Ohta; Takamasa Kimura; Hasan Rajib Imam; Sean Rocke; Jingkai Su; Alexander M. Wyglinski; Takeo Fujii (VTC Fall, 2012)

Joint resource allocation and interference avoidance with fairness consideration for multi-cell cognitive radio networks. - Hailan Peng; Takeo Fujii (WCNC, 2012)

Distributed antenna system aided cross-tier interference management for small cell networks. - Massa Ndong; Takeo Fujii (Wireless Days, 2012)

Cross-tier interference mitigation for self organized-self optimized femtocells. - Massa Ndong; Takeo Fujii (WTS, 2012)

Modulation level allocation for MGS streaming over a multihop wireless channel. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (EURASIP J. Wirel. Commun. Netw., 2012)

Joint cross-layer resource allocation and interference avoidance with QoS support for cognitive radio systems. - Hailan Peng; Takeo Fujii (EURASIP J. Wirel. Commun. Netw., 2012)

Cooperative Sensing with Distributed Pre-Detection for Gathering Sensing Information on Shared Primary Spectrum. - Mai Ohta; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2012)

Radio environment aware stable routing scheme for multi-hop cognitive radio network. - Shamsad Parvin; Takeo Fujii (IET Networks, 2012)

Field tests and indoor emulation of distributed autonomous multi-hop vehicle-to-vehicle communications over TV white space. - Onur Altintas; Yutaka Ihara; Haris Kremo; Hideaki Tanaka; Masaaki Ohtake; Takeo Fujii; Chikara Yoshimura; Keisuke Ando; Kazuya Tsukamoto; Masato Tsuru 001; Yuji Oie (ACM SIGMOBILE Mob. Comput. Commun. Rev., 2012)

Distributed autonomous multi-hop vehicle-to-vehicle communications over TV white space. - Yutaka Ihara; Haris Kremo; Onur Altintas; Hideaki Tanaka; Masaaki Ohtake; Takeo Fujii; Chikara Yoshimura; Keisuke Ando; Kazuya Tsukamoto; Masato Tsuru 001; Yuji Oie (CCNC, 2013)

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

Interference-adapted scheduling weight for small-cell in heterogeneous network. - Kei Inage; Takeo Fujii (PIMRC Workshops, 2013)

Short paper: Probing the spectrum with vehicles: Towards an advanced spectrum database. - Takeo Fujii; Kei Inage; Masayuki Kitamura; Onur Altintas; Haris Kremo; Hideaki Tanaka (VNC, 2013)

Delay Reduction Scheme Based on Fountain Coding for Wireless Relay Communication Systems. - Arash Asareh; Takeo Fujii (VTC Fall, 2013)

Hybrid Overlay/Underlay Resource Allocation for Cognitive Radio Networks in User Mobility Environment. - Hailan Peng; Takeo Fujii (VTC Fall, 2013)

A resource allocation algorithm for OFDM-based cellular system serving unicast and multicast services. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (EURASIP J. Wirel. Commun. Netw., 2013)

Capacity conservation ratio: a novel interference constraint for spectrum sharing. - Kei Inage; Takeo Fujii; Kazushi Muraoka; Masayuki Ariyoshi (Trans. Emerg. Telecommun. Technol., 2013)

Distributed Resource Allocation for Multi-Cell Cognitive Radio Networks Based on Intra-Cell Overlay and Inter-Cell Underlay Spectrum Sharing. - Hailan Peng; Takeo Fujii (IEICE Trans. Commun., 2013)

Learning-based p-persistent CSMA for secondary users of cognitive radio networks. - Sarenna Bao; Takeo Fujii (Int. J. Space Based Situated Comput., 2013)

A Power Allocation Algorithm for Maximizing Total Utility over an MBSFN. - Daeyeon Kim; Takeo Fujii; Kyesan Lee (IEEE Wirel. Commun. Lett., 2013)

Physical layer security using multi-band transmission considering channel selection for cognitive radio networks. - Akinari Ida; Takeo Fujii (APSIPA, 2014)

Mobility aware stable routing scheme for mobile multi hop Cognitive radio network. - Shamsad Parvin; Takeo Fujii (APSIPA, 2014)

Joint femtocell clustering and cross-tier interference mitigation with distributed antenna system in small cell networks. - Massa Ndong; Takeo Fujii (CSNDSP, 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)

Transition detection with spectrum database using weighted cooperative sensing. - Hao Wang; Takeo Fujii (ICUFN, 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)

Demo: A field test of measurement-based spectrum database using probing vehicles. - Koya Sato; Takashi Kosugi; Takeo Fujii (VNC, 2014)

Cooperative Spectrum Sensing in the Vehicular Environment: An Experimental Evaluation. - Haris Kremo; Onur Altintas; Hideaki Tanaka; Masayuki Kitamura; Kei Inage; Takeo Fujii (VTC Spring, 2014)

Serially-concatenated layered network coded cooperation for wireless sensor networks. - Huifa Lin; Koji Ishibashi; Takeo Fujii (WPMC, 2014)

Joint antenna selection and power allocation for distributed-stbc cognitive small cell networks. - Massa Ndong; Takeo Fujii (WPMC, 2014)

Cross-tier interference management with a distributed antenna system for multi-tier cellular networks. - Massa Ndong; Takeo Fujii (EURASIP J. Wirel. Commun. Netw., 2014)

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

Fusion center controlled carrier sense multiple access for physical wireless parameter conversion sensor networks. - Koji Kakinuma; Shunsuke Takagi; Shunta Sakai; Takeo Fujii (APSIPA, 2015)

A novel distributed STBC cooperative diversity scheme for OFDM multi-hop relay networks. - Cong-Hoang Diem; Takeo Fujii (CCNC, 2015)

Spectrum sharing method to form bundle of white space in cognitive radio. - Takashi Kosugi; Takeo Fujii (CCNC, 2015)

Radio spectrum vision in 50 years from now: Consideration on long term spectrum refarming mainly below 3 GHz. - Yukitsuna Furuya; Jun-ichi Takada; Kazuhiko Fukawa; Nobuo Nakajima; Takeo Fujii; Yoshiyuki Takeda (CSCN, 2015)

Kriging-Based Interference Power Constraint for Spectrum Sharing Based on Radio Environment Map. - Koya Sato; Takeo Fujii (GLOBECOM Workshops, 2015)

Modulation classification in cognitive radios for satellite and terrestrial systems. - Xu Zhu 004; Takeo Fujii (ICC Workshops, 2015)

Novel timing synchronization technique for public safety communication systems employing heterogeneous cognitive radio. - Masafumi Moriyama; Takeo Fujii (ICNC, 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)

Received power detection under multiple ON/OFF environment for registering radio environment database. - Hao Wang; Koya Sato; Takeo Fujii (ICTC, 2015)

Height power estimation with Radio Environment Database in urban area. - Koji Ichikawa; Hao Wang; Koya Sato; Takeo Fujii (ICUFN, 2015)

An efficient cooperative transmission scheme for vehicular communications. - Cong-Hoang Diem; Takeo Fujii (ITST, 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)

Poster: Location-based distributed channel assignment for communications among autonomous vehicles. - Daichi Ishikawa; Koya Sato; Takeo Fujii; Matthias Wilhelm 001; Haris Kremo; Onur Altintas (VNC, 2015)

Characterization of First and Second Order Statistics of Large Scale Fading Using Vehicular Sensors. - Haris Kremo; Kohsuke Nakagawa; Onur Altintas; Hideaki Tanaka; Takeo Fujii (VTC Spring, 2015)

Average interference power constraint with measurement-based spectrum database. - Koya Sato; Takeo Fujii (WCNC Workshops, 2015)

Primary and secondary identification using energy detection with statistical primary information. - Vannapha Southivong; Takeo Fujii (WCNC Workshops, 2015)

A Simple Random Access Scheme With Multilevel Power Allocation. - Huifa Lin; Koji Ishibashi; Won-Yong Shin; Takeo Fujii (IEEE Commun. Lett., 2015)

Efficient spectrum sharing with avoiding spatial fragmentation of white space. - Takashi Kosugi; Takeo Fujii (ICT Express, 2015)

Information Gathering for Wireless Sensor Networks with Information Converting to Wireless Physical Parameters. - Tomomi Endo; Shunta Sakai; Takeo Fujii (IEICE Trans. Commun., 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)

Decentralized Multilevel Power Allocation for Random Access. - Huifa Lin; Koji Ishibashi; Won-Yong Shin; Takeo Fujii (IEICE Trans. Commun., 2015)

Novel Synchronization and BER Improvement Method for Public Safety Mobile Communication Systems Employing Heterogeneous Cognitive Radio. - Masafumi Moriyama; Takeo Fujii (IEICE Trans. Commun., 2015)

Measurement-Based Spectrum Database for Flexible Spectrum Management. - Koya Sato; Masayuki Kitamura; Kei Inage; Takeo Fujii (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)

Relay transmit power allocation for distributed-space-time block code cognitive small cell networks. - Massa Ndong; Takeo Fujii (IET 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)

Implementation and Performance Evaluation of Distributed Autonomous Multi-Hop Vehicle-to-Vehicle Communications over TV White Space. - Kazuya Tsukamoto; Yuji Oie; Haris Kremo; Onur Altintas; Hideaki Tanaka; Takeo Fujii (Mob. Networks Appl., 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)

A novel modulation classification method in cognitive radios using higher-order cumulants and denoising stacked sparse autoencoder. - Xu Zhu 004; Takeo Fujii (APSIPA, 2016)

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

Decentralized power allocation for secondary random access in cognitive radio networks with successive interference cancellation. - Huifa Lin; Koji Ishibashi; Won-Yong Shin; Takeo Fujii (ICC, 2016)

Single-channel blind identification based advanced energy detection for cognitive radio. - Hang Liu; Takeo Fujii (ICUFN, 2016)

Receiver beacon transmission interval design for multi-stage wireless sensor networks. - Tomokazu Moriyama; Taiki Nakayama; Takeo Fujii (ICUFN, 2016)

Spectrum database-assisted radio propagation prediction for wireless distributed networks: A geostatistical approach. - Koya Sato; Kei Inage; Takeo Fujii (PIMRC, 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)

A novel modulation classification method in cognitive radios based on features clustering of time-frequency. - Xu Zhu 004; Takeo Fujii (RWS, 2016)

Poster: A scheduling method for V2V networks using successive interference cancellation. - Yuta Watanabe; Koya Sato; Takeo Fujii (VNC, 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)

Cooperative Distributed STBC Transmission Scheme for Multi-Hop V2V Communications. - Cong-Hoang Diem; Koya Sato; Takeo Fujii (IEICE Trans. Fundam. Electron. Commun. Comput. Sci., 2016)

Phase and Gain Imbalance Compensation in Low-IF Receivers. - Teruji Ide; Takeo Fujii; Mamiko Inamori; Yukitoshi Sanada (IEICE Trans. Commun., 2016)

Internet of Things over future internet. - Joon-Sang Park; Ling-Jyh Chen; Takeo Fujii; Piedad Garrido (Int. J. Distributed Sens. Networks, 2016)

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

Radio environment map construction using Hidden Markov Model in multiple primary user environment. - Koji Ichikawa; Takeo Fujii (ICNC, 2017)

Relay selection method using radio environment database for multi-hop V2V communications. - Cong-Hoang Diem; Takeo Fujii (ICOIN, 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)

Multiple information collection by utilizing physical wireless parameter conversion sensor network (PHY-C SN). - Koji Kakinuma; Takeo Fujii (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)

Measurement-based spectrum database with mesh clustering. - Rei Hasegawa; Takeo Fujii (ICUFN, 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)

Primary user detection in cognitive radio using spectral-correlation features and stacked denoising autoencoder. - Hang Liu; Xu Zhu 004; Takeo Fujii (PIMRC, 2017)

Compensation of survivorship bias in path loss modeling. - Koya Sato; Kei Inage; Takeo Fujii (PIMRC, 2017)

A modulation classification method in cognitive radios system using stacked denoising sparse autoencoder. - Xu Zhu 004; Takeo Fujii (RWS, 2017)

Poster: Multi-antenna successive interference cancellation to improve reliability of V2V communication. - Tatsuya Ute; Yuta Watanabe; Koya Sato; Takeo Fujii; Takayuki Shimizu; Onur Altintas (VNC, 2017)

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

Crowdsourcing-Assisted Radio Environment Maps for V2V Communication Systems. - Keita Katagiri; Koya Sato; Takeo Fujii (VTC Fall, 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)

Radio Environment Aware Computation Offloading with Multiple Mobile Edge Computing Servers. - Koya Sato; Takeo Fujii (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)

Smart Spectrum for Future Wireless World. - Takeo Fujii; Kenta Umebayashi (IEICE Trans. Commun., 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)

Modulation classification for cognitive radios using stacked denoising autoencoders. - Xu Zhu 004; Takeo Fujii (Int. J. Satell. Commun. Netw., 2017)

Joint Routing and Spectrum Allocation for Multi-hop Inter-Vehicle Communication in Cognitive Radio Networks. - Tsubasa Suzuki; Takeo Fujii (Int. J. Intell. Transp. Syst. Res., 2017)

Handling cross-tier interference in underlay macrocell system for future small cell networks. - Massa Ndong; Takeo Fujii (J. Commun. Networks, 2017)

Intermittent Interval Feedback Design for Multi-Stage Wireless Sensor Networks. - Tomokazu Moriyama; Taiki Nakayama; Takeo Fujii (Mob. Networks Appl., 2017)

Kriging-Based Interference Power Constraint: Integrated Design of the Radio Environment Map and Transmission Power. - Koya Sato; Takeo Fujii (IEEE Trans. Cogn. Commun. Netw., 2017)

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)

Ensemble Deep Learning Based Cooperative Spectrum Sensing with Stacking Fusion Center. - Hang Liu; Xu Zhu 004; Takeo Fujii (APSIPA, 2018)

Environmental Aware Hierarchical Ad Hoc Network with Multiple Frequency Bands using Weighted Laplacian Matrix. - Toshiyuki Shizuoka; Takeo Fujii (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)

Smart Spectrum Management for V2X. - Takeo Fujii (DySPAN, 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)

Resource management for mobile edge computing using user mobility prediction. - Takayuki Ojima; Takeo Fujii (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)

Reliable vehicle-to-vehicle communication using spectrum environment map. - Shunsuke Tsurumi; Takeo Fujii (ICOIN, 2018)

Routing Redundancy Reducing Method for U-Bus Air Using Cloud Cooperation. - Hiroshi Sanada; Takeo Fujii; Reina Aizawa; Takuya Kawata (ICUFN, 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)

Time Series Analysis of Multiple Primary User Environment Using HMM-Based Spectrum Sensing. - Yuya Aoki; Takeo Fujii; Teruji Ide (VTC Fall, 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)

Low Storage, but Highly Accurate Measurement-Based Spectrum Database via Mesh Clustering. - Rei Hasegawa; Keita Katagiri; Koya Sato; Takeo Fujii (IEICE Trans. Commun., 2018)

A New Classification-Like Scheme for Spectrum Sensing Using Spectral Correlation and Stacked Denoising Autoencoders. - Hang Liu; Xu Zhu 004; Takeo Fujii (IEICE Trans. Commun., 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)

Crowdsourcing-Assisted Radio Environment Database for V2V Communication. - Keita Katagiri; Koya Sato; Takeo Fujii (Sensors, 2018)

Emerging Small Cell Wireless Technologies for 5G: Architectures and Applications. - Mostafa Zaman Chowdhury; Takeo Fujii; Gabriel-Miro Muntean; Ji-Woong Choi; Giuseppe Araniti (Wirel. Commun. Mob. Comput., 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)

Dynamic Bandwidth Allocation for Spectrum Shared Private Mobile Networks Using Prior Measured CQI Information. - Akihisa Abe; Takeo Fujii (DySPAN, 2019)

Demo: Highly Accurate Prediction of Radio Environment for V2V Communications. - Keita Katagiri; Takeo Fujii (DySPAN, 2019)

Radio Environment Map Updating Procedure Based on Hypothesis Testing. - Keita Katagiri; Takeo Fujii (DySPAN, 2019)

Effect of LBT Time on LoRa Network Performance: Signal Detection Theorem Based Analyses. - Shusuke Narieda; Takeo Fujii; Kenta Umebayashi (DySPAN, 2019)

Spectrum Database Construction based on HMM and Spectrum Sharing in Multiple Primary Users Environment. - Yuya Aoki; Takeo Fujii (ICAIIC, 2019)

Cyclostationary based full-duplex spectrum sensing using adversarial training for convolutional neural networks. - Hang Liu; Xu Zhu 004; Takeo Fujii (ICAIIC, 2019)

Adversarial training for low-complexity convolutional neural networks using in spectrum sensing. - Hang Liu; Xu Zhu 004; Takeo Fujii (ICAIIC, 2019)

Construction of Time-Space Radio Environment Database using HMM for Cooperative Sensing. - Yuya Aoki; Takeo Fujii (ICNC, 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)

Experimental Verification of Frequency-Correlation in Radio Propagation Characteristics for Radio Environment Recognition. - Keita Onose; Koya Sato; Kei Inage; Takeo Fujii (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)

Receiver Beacon Transmission Interval Design Using Machine Learning for Multi-Stage Wireless Sensor Networks. - Yu-Ki Hatada; Takeo Fujii (ICUFN, 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)

Proactive Cache System Using Cellular-Radio Information on MEC. - Miho Tanaka; Kenichi Nagasue; Jun Ogawa; Akira Yokomichi; Yoshihiro Ando; Takayuki Ojima; Toshiyuki Shizuoka; Koichi Adachi; Takeo Fujii (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)

Sensor Selection Based on Dempster-Shafer Evidence Theory under Collaborative Spectrum Sensing in Cognitive Radio Sensor Networks. - Ying Gao; Ming Diao; Takeo Fujii (VTC Fall, 2019)

Measurements of LoRa Propagation in Harsh Environment: Numerous NLOS Areas and Ill-Conditioned LoRa Gateway. - Kenta Inagaki; Shusuke Narieda; Takeo Fujii; Kenta Umebayashi; Hiroshi Naruse (VTC Fall, 2019)

Highly Accurate Prediction of Radio Propagation Using Model Classifier. - Keita Katagiri; Keita Onose; Koya Sato; Kei Inage; Takeo Fujii (VTC Spring, 2019)

Derivation of Sensing Features for Maximum Cyclic Autocorrelation Selection Based Signal Detection. - Shusuke Narieda; Daiki Cho; Hiromichi Ogasawara; Kenta Umebayashi; Takeo Fujii; Hiroshi Naruse (VTC Fall, 2019)

Ensemble Deep Learning Based Cooperative Spectrum Sensing with Semi-soft Stacking Fusion Center. - Hang Liu; Xu Zhu 004; Takeo Fujii (WCNC, 2019)

High Density Spectrum Sharing Method among Micro Operators considering Spectrum Database. - Hirofumi Nakajo; Yuya Aoki; Keita Katagiri; Takeo Fujii (WCNC Workshops, 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)

On the Performance of Neural Network Residual Kriging in Radio Environment Mapping. - Koya Sato; Kei Inage; 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)

A heuristic method-based parallel cooperative spectrum sensing in heterogeneous network. - Shuang Fu; Guoyin Zhang; Takeo Fujii (J. Supercomput., 2019)

Modeling the Kriging-Aided Spatial Spectrum Sharing Over Log-Normal Channels. - Koya Sato; Kei Inage; Takeo Fujii (IEEE Wirel. Commun. Lett., 2019)

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

On Placement of End Devices in LPWAN Based WSN for Environmental Monitoring Applications. - Ayumi Kaichi; Shusuke Narieda; Takeo Fujii; Kenta Umebayashi; Hiroshi Naruse (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)

Compensation Method of Received Signal Power observed by Smartphone for Crowdsensed Spectrum Database. - Taiki Matsushima; 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)

Scheduling Algorithm Considering Interference Interval for LPWA. - Yudai Yamazaki; Takeo Fujii (APSIPA, 2020)

Receiver Beacon Transmission Interval Design Using Q-Learning focused on Packet Delivery Rate for Multi-Stage Wireless Sensor Networks. - Yu-Ki Hatada; Takeo Fujii (ICAIIC, 2020)

Measurement-based Spectrum Database for Wireless Distributed Networks Using Shadowing Classifier. - Keita Katagiri; Takeo Fujii (ICAIIC, 2020)

Radio Environment Map Construction with Joint Space-Frequency Interpolation. - Koya Sato; Kei Inage; Takeo Fujii (ICAIIC, 2020)

On Power Consumption of End Device in LoRa Networks with Listen Before Talk. - Shusuke Narieda; Takeo Fujii; Kenta Umebayashi (ICOIN, 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)

An UAV and Distributed STBC for Wireless Relay Networks in Search and Rescue Operations. - Cong-Hoang Diem; Takeo Fujii (INISCOM, 2020)

Utilization of Spectrum Database for Power Control in Micro Operator Based Small Cell System by Two-Stage Stochastic Design. - Tetsuki Taniguchi; Takeo Fujii (ISSPIT, 2020)

Post-Reception Compensation Performance of Blind Nonlinear Compensator with Equalizer against Memory Nonlinear Distortion. - Hiroki Ito; Takeo Fujii; Yasushi Yamao (VTC Fall, 2020)

Experimental Verification of Shadowing Classification for Radio Map. - Keita Katagiri; Koya Sato; Kei Inage; Takeo Fujii (VTC Fall, 2020)

Interference Management with Beamforming Utilizing Spectrum Database for Micro Operators. - Tetsuki Taniguchi; Takeo Fujii (VTC Fall, 2020)

Radio Environment Map Updating Procedure Considering Change of Surrounding Environment. - Keita Katagiri; Takeo Fujii (WCNC Workshops, 2020)

Convolutional Neural Networks for Pilot-Induced Cyclostationarity Based OFDM Signals Spectrum Sensing in Full-Duplex Cognitive Radio. - Hang Liu; Xu Zhu 004; Takeo Fujii (IEICE Trans. Commun., 2020)

Theoretical Analyses of Maximum Cyclic Autocorrelation Selection Based Spectrum Sensing. - Shusuke Narieda; Daiki Cho; Hiromichi Ogasawara; Kenta Umebayashi; Takeo Fujii; Hiroshi Naruse (IEICE Trans. Commun., 2020)

Energy Constrained Optimization for Spreading Factor Allocation in LoRaWAN. - Shusuke Narieda; Takeo Fujii; Kenta Umebayashi (Sensors, 2020)

Intra-System Interference Avoidance for Packet-Level Index Modulation in Internet of Things. - Mai Ohta; Takeo Fujii (APSIPA ASC, 2021)

Low Storage Radio Map Using Statistical Inference. - Keita Katagiri; Takeo Fujii (DySPAN, 2021)

Relay Nodes Selection Using Reinforcement Learning. - Haesik Kim; Takeo Fujii; Kenta Umebayashi (ICAIIC, 2021)

Wireless System Selection with Spectrum Database for IoT. - Soraya Mitate; Yudai Yamazaki; Takeo Fujii; Shusuke Narieda (ICOIN, 2021)

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

Mesh-Clustering-Based Radio Maps Construction for Autonomous Distributed Networks. - Keita Katagiri; Takeo Fujii (ICUFN, 2021)

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

Local 5G mmWave Signal Measurement and Analysis for Spectrum Database. - Hirofumi Nakajo; Takeo Fujii (ICUFN, 2021)

Spatio-Temporal Analyses of Environmental Monitoring Based on Wireless Sensor Networks. - Ryoma Yasutani; Koki Kitazumi; Shusuke Narieda; Takeo Fujii; Kenta Umebayashi; Hiroshi Naruse (IEEE SENSORS, 2021)

Improvement of Radio Environment Map under Data Falsification Attack. - Ying Gao; Takeo Fujii (VTC Fall, 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)

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)

Towards mmWave V2X in 5G and Beyond to Support Automated Driving. - Kei Sakaguchi; Ryuichi Fukatsu; Tao Yu 011; Eisuke Fukuda; Kim Mahler; Robert W. Heath Jr.; Takeo Fujii; Kazuaki Takahashi; Alexey Khoryaev; Satoshi Nagata; Takayuki Shimizu (IEICE Trans. Commun., 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)

Clustering for Signal Power Distribution Toward Low Storage Crowdsourced Spectrum Database. - Yoji Uesugi; Keita Katagiri; Koya Sato; Kei Inage; Takeo Fujii (IEICE Trans. Commun., 2021)

Packet Delivery Ratio Prediction for V2V Based on Radio Environment Map Considering Hidden Terminal Problem. - Ayumu Ueda; Takeo Fujii (Int. J. Intell. Transp. Syst. Res., 2021)

Dynamic Radio Map Using Statistical Hypothesis Testing. - Keita Katagiri; Koya Sato; Kei Inage; Takeo Fujii (IEEE Trans. Cogn. Commun. Netw., 2021)

Space-Frequency-Interpolated Radio Map. - Koya Sato; Katsuya Suto; Kei Inage; Koichi Adachi; Takeo Fujii (IEEE Trans. Veh. Technol., 2021)

Image-Driven Spatial Interpolation With Deep Learning for Radio Map Construction. - Katsuya Suto; Shinsuke Bannai; Koya Sato; Kei Inage; Koichi Adachi; Takeo Fujii (IEEE Wirel. Commun. Lett., 2021)

Measurement of sub-GHz Band LPWA Propagation at Half-Wavelength Intervals. - Natsuki Miyoshi; Tomoyuki Kawashima; Shusuke Narieda; Takeo Fujii; Hiroshi Naruse (FNWF, 2022)

Power Control in Local 5G/Beyond Systems Utilizing Spectrum Database and Monte Carlo Stochastic Programming. - Tetsuki Taniguchi; Takeo Fujii (CCWC, 2022)

Classification and Discretization of Shadowing Toward Low Storage Radio Map. - Keita Katagiri; Takeo Fujii (ICAIIC, 2022)

Throughput Prediction by Radio Environment Correlation Recognition Using Crowd Sensing and Federated Learning. - Satoshi Nakaniida; Takeo Fujii (ICAIIC, 2022)

Partitioned Path Loss Models Based on Coefficient of Determination. - Keita Katagiri; Takeo Fujii (ICOIN, 2022)

Radio Propagation Extrapolation by Using Multiple Separated Propagation Paths Estimated by Radio Map. - Shougo Matsuo; Sunao Miyamoto; Keita Katagiri; Takeo Fujii (ICOIN, 2022)

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

Characteristics of RSSI Kriging Interpolated Value in Neighborhood of Buildings. - Ryo Miyamoto; Shusuke Narieda; Takeo Fujii; Hiroshi Naruse (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)

Characteristics of Transmit Power Allocation for Poor Conditioned End Devices in LPWAN with Peak Detection Based Carrier Sense. - Shusuke Narieda; Takeo Fujii (ICUFN, 2022)

Differential Packet Level Index Modulation for Low Power Wide Area System. - Mai Ohta; Takeo Fujii (ICUFN, 2022)

Device Adaptive Control Method Considering Power Consumption for Pedestrian-to-Infrastructure Communications. - Noriyuki Oki; Atsuki Mukoda; Ayumu Ueda; Takeo Fujii (ICUFN, 2022)

Terminal Selection Based on Multi-armed Bandit under Threatening Environment for Radio Environment Map Construction. - Ying Gao; Takeo Fujii (VTC Spring, 2022)

Kriging-based Trust Nodes Aided REM Construction under Threatening Environment. - Ying Gao; Takeo Fujii (VTC Fall, 2022)

Blockage Prediction for Millimeter-wave Communications Based on People Flow Data. - Hirofumi Nakajo; Takeo Fujii (VTC Fall, 2022)

An Improvement of Security Scheme for Radio Environment Map Under Massive Attacking. - Ying Gao; Takeo Fujii (IEEE Access, 2022)

Radio Map Extrapolation Using Compensated Empirical CDF Under Interference-Limited Observations. - Keita Katagiri; Koya Sato; Kei Inage; Takeo Fujii (IEEE Access, 2022)

Transmit Power Allocation Schemes for Performance Improvement of Poor Conditioned End Devices in LPWAN. - Shusuke Narieda; Takeo Fujii (IEEE Access, 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)

5D Spectrum Database. - Hirofumi Nakajo; Yusuke Itayama; Shougo Matsuo; Takeo Fujii (ICAIIC, 2023)

Measurement-based Spectrum Database for Non-Terrestrial Networks. - Yusuke Itayama; Hirofumi Nakajo; Shougo Matsuo; Takeo Fujii (ICOIN, 2023)

Lower Bound for the Number of Accommodable End-devices in LPWAN with Multiple Interferences. - Daisuke Kumamoto; Shusuke Narieda; Takeo Fujii; Hiroshi Naruse (ICOIN, 2023)

Beam Pattern Estimation of 5G Millimeter-Wave Base Station Based on Radio Map and Multi-Beam Antenna Model at 28GHz. - Shougo Matsuo; Sunao Miyamoto; Hirofumi Nakajo; Takeo Fujii (ICOIN, 2023)

Measurement of Sub-GHz Band LPWA Radiowave Propagation on Each Floor in Indoor Environment. - Taro Miyamoto; Shusuke Narieda; Takeo Fujii; Hiroshi Naruse (ICOIN, 2023)

Height Pattern Estimation Method Using the Combination of Radio Map and 3D Map for Spectrum Sharing. - Sunao Miyamoto; Shota Yamada; Takeo Fujii (ICOIN, 2023)

Robustness to Digital Power Adjustment in Transmit Power Allocation for Poor Conditioned LPWA End Devices. - Shusuke Narieda; Takeo Fujii (ICOIN, 2023)

Hidden Node Recognition Utilizing Wireless LAN Sensing Data in Indoor Environments. - Hayato Mukasa; Takeo Fujii (ICUFN, 2023)

Observation Data and 3D Map-based Radio Environment Estimation for Drone Wireless Communications. - Shota Yamada; Takeo Fujii; Katsuya Suto; Koya Sato (ICUFN, 2023)

Packet Aggregation Utilizing Multi-Antenna Beamforming in IRDT Protocol. - Keigo Saito; Takeo Fujii; Koji Ishibashi; Yu Shibata; Soma Toki; Hideki Endo (VTC Fall, 2023)

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

Propagation Graph Representation Learning and Its Implementation in Direct Path Representation. - Katsuya Suto; Shinsuke Bannai; Koya Sato; Takeo Fujii (WCNC, 2023)

Spreading Factor Allocation for Extension of End Device Lifetime in LoRaWAN. - Shusuke Narieda; Takeo Fujii (WF-IoT, 2023)

User Pairing Method Using Radio Map for Spectrum Sharing Between Non-Terrestrial Networks and Terrestrial Networks. - Shugo Hirano; Hirofumi Nakajo; Takeo Fujii (WPMC, 2023)

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

A Kriging-Based Radio Environment Map Construction and Channel Estimation System in Threatening Environments. - Ying Gao; Takeo Fujii (IEEE Access, 2023)

Energy Detection Based Carrier Sense in LPWAN. - Shusuke Narieda; Takeo Fujii (IEEE Access, 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 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)

A Study on Packet-Level Index Modulation Using Frequency Offsets within a LoRaWAN Channel. - Mai Ohta; Hiroki Matsuura; Takeo Fujii (APSIPA, 2024)

Analyses of Hidden and Exposed Nodes in LPWAN with Energy Detection Based Carrier Sense. - Shusuke Narieda; Takeo Fujii (CCNC, 2024)

On Execution at End Devices for Energy Detection Based Carrier Sense in LPWAN. - Shusuke Narieda; Takeo Fujii (CCNC, 2024)

MAC Protocol Adaptation Method in Coordination with Application. - Koshiro Aruga; Takeo Fujii (ICAIIC, 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)

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 of Communication Quality Estimation Methods for LTE Using Communication Indexces Considering Time Variability. - Keisuke Kikuchi; Takeo Fujii (ICOIN, 2024)

Indoor Wireless Environment Visualization for Smart Factories. - Hayato Mukasa; Koshiro Aruga; Takeo Fujii; Koichi Adachi (ICOIN, 2024)

Characteristics of LoRaWAN with Energy Detection Based Carrier Sense. - Shusuke Narieda; Takeo Fujii (ICOIN, 2024)

Indoor Radio Environment Map Construction using Node Position Estimation for Smart Factories. - Hayato Mukasa; Kohei Yuzawa; Takeo Fujii; Koichi Adachi (PIMRC, 2024)

Radio Propagation Graph Representation Learning: An Implementation in Multi-Hop Path Representation. - Shimon Takagi; Shinsuke Bannai; Koya Sato; Takeo Fujii; Katsuya Suto (PIMRC, 2024)

Welcome Message. - Susumu Ishihara; Hiroshi Shigeno; Onur Altintas; Takeo Fujii; Raphaël Frank; Florian Klingler (VNC, 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)

Multi-Hop Communication System with Multi-Antenna Beamforming in IRDT Protocol. - Keigo Saito; Takeo Fujii; Koji Ishibashi; Yu Shibata; Soma Toki; Jumpei Doi; Toru Hatae (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)

Self-Tuning of Signal Detection Level for Energy Detection-Based Carrier Sense in Low-Power Wide-Area Networks. - Shusuke Narieda; Takeo Fujii (Sensors, 2024)

Performance Analysis of 3D Radio Environment Mapping with Path Classification and Kriging. - Shota Yamada; Takeo Fujii (CCNC, 2025)

Random Forest Prediction of WLAN Throughput using Communication Logs and Channel Occupancy Rate. - Nan Ni; Takeo Fujii (ICOIN, 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)