Kenta Umebayashi

117 papers B 33Journal 44Unranked 40
YearRankTypeTitle / Venue / Authors
2025 J jnl
Accurate Noise Source Separation in Pulse-Frequency Modulation-Controlled Power Converters Using Asynchronous Near-Field and Far-Field Measurement Analysis.
IEEE Access
Hiroyasu Sano, Kenta Umebayashi, Satoshi Suzuki, Hidekatsu Sasaki, Yasuaki Kaneda
2025 B conf
Design of SVD-Precoded Faster-Than-Nyquist Signaling Considered Inter-Block-Interference.
PIMRC
Kenta Umebayashi, Yuto Ikarashi
2025 J jnl
Optimizing Access Point Placement in Industrial IoT: A Deep Reinforcement Learning Approach With Q-Learning Verification and Signal Heatmap Visualization.
IEEE Access
Manash Mahanta, Attaphongse Taparugssanagorn, Kenta Umebayashi
2024 J jnl
Robust EV Scheduling in Charging Stations Under Uncertain Demands and Deadlines.
IEEE Trans. Intell. Transp. Syst.
Su Pyae Sone, Janne J. Lehtomäki, Zaheer Khan, Kenta Umebayashi, Kwang Soon Kim
2023 J jnl
Device-to-device Communications at the Terahertz Band: Open Challenges for Realistic Implementation.
IEEE Commun. Stand. Mag.
Zhaona Wu, Kenta Umebayashi, Janne Lehtomäki, Nizar Zorba
2023 J jnl
Energy Detection for M-QAM Signals.
IEEE Access
Shun Ishihara, Kenta Umebayashi, Janne J. Lehtomäki
2023 J jnl
Enhanced Signal Detection and Constellation Design for Massive SIMO Communications With 1-Bit ADCs.
IEEE Access
Doaa Abdelhameed, Kenta Umebayashi, Italo Atzeni, Antti Tölli
2023 B conf
Spectrum Occupancy Prediction based on adaptive Recurrent Neural Networks.
WCNC
Kenta Umebayashi, Yoshiki Kasahara, Hiroki Iwata, Ahmed Al-Tahmeesschi, Johanna Vartiainen
2022 — conf
Distance Estimation Based on Molecular Absorption at THz Frequencies.
GLOBECOM (Workshops)
Janne Lehtomäki, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Markku J. Juntti
2022 J jnl
Proactive Radar Protection System in Shared Spectrum via Forecasting Secondary User Power Levels.
IEEE Access
Su Pyae Sone, Janne Lehtomäki, Zaheer Khan, Kenta Umebayashi, Zunera Javed
2021 — conf
Energy Detection for M-QAM Signals.
VTC Spring
Shun Ishihara, Kenta Umebayashi, Janne Lehtomäki
2021 — conf
Enhanced Signal Detection for Massive SIMO Communications with 1-Bit ADCs.
SPAWC
Doaa Abdelhameed, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Italo Atzeni, Antti Tölli
2021 J jnl
Feature-Based Deep Neural Networks for Short-Term Prediction of WiFi Channel Occupancy Rate.
IEEE Access
Ahmed Al-Tahmeesschi, Kenta Umebayashi, Hiroki Iwata, Janne Lehtomäki, Miguel López-Benítez
2021 — conf
Forecasting Wireless Network Traffic and Channel Utilization Using Real Network/Physical layer Data.
EuCNC/6G Summit
Su Pyae Sone, Janne Lehtomäki, Zaheer Khan, Kenta Umebayashi
2021 J jnl
High-Efficiency FCME-Based Noise Power Estimation for Long-Term and Wide-Band Spectrum Measurements.
IEEE Access
Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Janne Lehtomäki
2021 J jnl
Performance Analysis of Resource Allocation in THz-Based Subcarrier Index Modulation Systems for Mobile Users.
IEEE Access
Mohannad Alzard, Saud Althunibat, Kenta Umebayashi, Nizar Zorba
2021 — conf
Relay Nodes Selection Using Reinforcement Learning.
ICAIIC
Haesik Kim, Takeo Fujii, Kenta Umebayashi
2021 B conf
Resource Allocation in THz-based Subcarrier Index Modulation Systems for Mobile Users.
GLOBECOM
Mohannad Alzard, Saud Althunibat, Kenta Umebayashi, Nizar Zorba
2021 — conf
Spatio-Temporal Analyses of Environmental Monitoring Based on Wireless Sensor Networks.
IEEE SENSORS
Ryoma Yasutani, Koki Kitazumi, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse
2021 — conf
Time Domain Propagation Characteristics with Causal Channel Model for Terahertz Band.
ICC Workshops
Zhaona Wu, Hiroto Ebisawa, Kenta Umebayashi, Janne Lehtomäki, Nizar Zorba
2020 — conf
A Study on High-Efficiency Energy Detection-Based Spectrum Measurements.
WCNC Workshops
Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Satya Krishna Joshi, Miguel López-Benítez, Janne J. Lehtomäki
2020 B conf
Adaptive Antenna Array with weight and antenna space control.
WCNC
Kenta Umebayashi, Yoshimasa Kimoto, Antti Tölli
2020 B conf
Applying Deep Neural Networks for Duty Cycle Estimation.
WCNC
Ahmed Al-Tahmeesschi, Kenta Umebayashi, Hiroki Iwata, Miguel López-Benítez, Janne Lehtomäki
2020 — conf
Direct Beamformer Estimation for Hybrid Architecture in mmWave Dynamic TDD System.
WCNC Workshops
Prashant Kumar Shah, Krishna Joshi, Satya Krishna Joshi, Antti Tölli, Kenta Umebayashi
2020 J jnl
Energy Constrained Optimization for Spreading Factor Allocation in LoRaWAN.
Sensors
Shusuke Narieda, Takeo Fujii, Kenta Umebayashi
2020 J jnl
Estimation of Primary Channel Activity Statistics in Cognitive Radio Based on Imperfect Spectrum Sensing.
IEEE Trans. Commun.
Ogeen H. Toma, Miguel López-Benítez, Dhaval K. Patel, Kenta Umebayashi
2020 B conf
Methods for Fast Estimation of Primary Activity Statistics in Cognitive Radio Systems.
WCNC
Miguel López-Benítez, Ogeen H. Toma, Dhaval K. Patel, Kenta Umebayashi
2020 — conf
On Placement of End Devices in LPWAN Based WSN for Environmental Monitoring Applications.
APSIPA
Ayumi Kaichi, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse
2020 — conf
On Power Consumption of End Device in LoRa Networks with Listen Before Talk.
ICOIN
Shusuke Narieda, Takeo Fujii, Kenta Umebayashi
2020 B conf
Reconstruction Algorithm for Primary Channel Statistics Estimation Under Imperfect Spectrum Sensing.
WCNC
Ogeen H. Toma, Miguel López-Benítez, Dhaval K. Patel, Kenta Umebayashi
2020 — conf
Sample Size Analysis of Energy Detection under Fading Channels.
WCNC Workshops
Miguel López-Benítez, Ogeen H. Toma, Dhaval K. Patel, Kenta Umebayashi
2020 J jnl
Theoretical Analyses of Maximum Cyclic Autocorrelation Selection Based Spectrum Sensing.
IEICE Trans. Commun.
Shusuke Narieda, Daiki Cho, Hiromichi Ogasawara, Kenta Umebayashi, Takeo Fujii, Hiroshi Naruse
2019 B conf
Accurate Noise Floor Calibration based on Modified Expectation Maximisation of Gaussian Mixture.
WCNC
Miguel López-Benítez, Janne Lehtomäki, Kenta Umebayashi, Dhaval Patel
2019 — conf
Derivation of Sensing Features for Maximum Cyclic Autocorrelation Selection Based Signal Detection.
VTC Fall
Shusuke Narieda, Daiki Cho, Hiromichi Ogasawara, Kenta Umebayashi, Takeo Fujii, Hiroshi Naruse
2019 J jnl
Design of Spectrum Usage Detection in Wideband Spectrum Measurements.
IEEE Access
Kenta Umebayashi, Yoshitaka Tamaki, Miguel López-Benítez, Janne J. Lehtomäki
2019 — conf
Effect of LBT Time on LoRa Network Performance: Signal Detection Theorem Based Analyses.
DySPAN
Shusuke Narieda, Takeo Fujii, Kenta Umebayashi
2019 J jnl
Estimation of Primary Channel Activity Statistics in Cognitive Radio Based on Periodic Spectrum Sensing Observations.
IEEE Trans. Wirel. Commun.
Miguel López-Benítez, Ahmed Al-Tahmeesschi, Dhaval K. Patel, Janne J. Lehtomäki, Kenta Umebayashi
2019 — conf
Measurements of LoRa Propagation in Harsh Environment: Numerous NLOS Areas and Ill-Conditioned LoRa Gateway.
VTC Fall
Kenta Inagaki, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse
2019 J jnl
On the Sample Size for the Estimation of Primary Activity Statistics Based on Spectrum Sensing.
IEEE Trans. Cogn. Commun. Netw.
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Dhaval K. Patel, Janne Lehtomäki, Kenta Umebayashi
2019 B conf
Primary Channel Duty Cycle Estimation under Imperfect Spectrum Sensing Based on Mean Channel Periods.
GLOBECOM
Ogeen H. Toma, Miguel López-Benítez, Dhaval K. Patel, Kenta Umebayashi
2019 — conf
Spectrum usage model for smart spectrum.
ICCC Workshops
Kenta Umebayashi
2019 — conf
Statistics Shared CAF Diversity Combining Based Sensing Using Weight Computation Technique.
ICAIIC
Shusuke Narieda, Daiki Cho, Kenta Umebayashi, Hiroshi Naruse
2019 — conf
Time Domain Channel Model for the THz Band.
ISWCS
Kazuhiro Tsujimura, Kenta Umebayashi, Joonas Kokkoniemi, Janne Lehtomäki
2019 — conf
Time and Frequency Varying Noise Floor Estimation for Spectrum Usage Measurement.
WCNC Workshops
Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki
2018 — conf
A study on impulse response model of reflected path for THz band.
APSIPA
Kazuhiro Tsujimura, Kenta Umebayashi, Joonas Kokkoniemi, Janne Lehtomäki
2018 B conf
A study on time domain deterministic-stochastic model of spectrum usage in WLAN.
WCNC
Kenta Umebayashi, Miguel López-Benítez
2018 B conf
Accurate estimation of primary user traffic based on periodic spectrum sensing.
WCNC
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi
2018 J jnl
Cooperative Estimation of Primary Traffic Under Imperfect Spectrum Sensing and Byzantine Attacks.
IEEE Access
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Valerio Selis, Dhaval K. Patel, Kenta Umebayashi
2018 J jnl
Efficient Time Domain Deterministic-Stochastic Model of Spectrum Usage.
IEEE Trans. Wirel. Commun.
Kenta Umebayashi, Masanao Kobayashi, Miguel López-Benítez
2018 B conf
Improving primary statistics prediction under imperfect spectrum sensing.
WCNC
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi
2018 J jnl
Welch FFT Segment Size Selection Method for FFT Based Wide Band Spectrum Measurement.
IEICE Trans. Commun.
Hiroki Iwata, Kenta Umebayashi, Janne J. Lehtomäki, Shusuke Narieda
2017 — conf
A Study on False Alarm Cancellation for Spectrum Usage Measurements.
WCNC Workshops
Riki Mizuchi, Kenta Umebayashi, Janne J. Lehtomäki, Miguel López-Benítez
2017 B conf
Analytical study on the estimation of primary activity distribution based on spectrum sensing.
PIMRC
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Kenta Umebayashi, Janne J. Lehtomäki
2017 — conf
Investigating the Estimation of Primary Occupancy Patterns under Imperfect Spectrum Sensing.
WCNC Workshops
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi
2017 B conf
PECAS: A Low-Cost Prototype for the Estimation of Channel Activity Statistics in Cognitive Radio.
WCNC
Miguel López-Benítez, Ahmed Al-Tahmeesschi, Kenta Umebayashi, Janne J. Lehtomäki
2017 J jnl
Smart Spectrum for Future Wireless World.
IEICE Trans. Commun.
Takeo Fujii, Kenta Umebayashi
2017 — conf
Study on simple signal area estimation for efficient spectrum measurements.
EuCNC
Kenta Umebayashi, Hiroki Iwata, Janne J. Lehtomäki, Miguel López-Benítez
2017 J jnl
Threshold-Setting for Spectrum Sensing Based on Statistical Information.
IEEE Commun. Lett.
Kenta Umebayashi, Kazuhiro Hayashi, Janne J. Lehtomäki
2016 — conf
A study on Welch FFT segment size selection method for spectrum awareness.
WCNC Workshops
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki
2016 B conf
A study on Welch FFT segment size selection method for spectrum awareness.
WCNC
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki
2016 J jnl
Analysis of transmit power setting technique for cognitive radio networks.
EURASIP J. Wirel. Commun. Netw.
Kenta Umebayashi, Janne J. Lehtomäki, Isameldin Suliman
2016 — conf
CAF Diversity Combining for Spectrum Sensing by Test Statistics Sharing with Time-Averaged Weights.
VTC Fall
Daiki Cho, Atsushi Kondo, Shusuke Narieda, Kenta Umebayashi
2016 J jnl
Simple Primary User Signal Area Estimation for Spectrum Measurement.
IEICE Trans. Commun.
Kenta Umebayashi, Kazuki Moriwaki, Riki Mizuchi, Hiroki Iwata, Samuli Tiiro, Janne J. Lehtomäki, Miguel López-Benítez, Yasuo Suzuki
2016 J jnl
Smart Spectrum Technologies for Mobile Information Systems.
Mob. Inf. Syst.
Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi, Fernando Casadevall
2016 J jnl
Welch FFT Segment Size Selection Method for Spectrum Awareness System.
IEICE Trans. Commun.
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Janne J. Lehtomäki, Miguel López-Benítez, Yasuo Suzuki
2015 J jnl
Improved Channel Occupancy Rate Estimation.
IEEE Trans. Commun.
Janne J. Lehtomäki, Miguel López-Benítez, Kenta Umebayashi, Markku J. Juntti
2015 J jnl
On the effect of false alarm rate on the performance of cognitive radio networks.
EURASIP J. Wirel. Commun. Netw.
Isameldin Suliman, Janne J. Lehtomäki, Kenta Umebayashi
2015 — conf
Optimum welch FFT segment size for duty cycle estimation in spectrum awareness system.
WCNC Workshops
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki
2014 — conf
A study on detection of receiving signal status change with array antenna.
ICOIN
Seiya Kato, Kenta Umebayashi, Yasuo Suzuki
2014 — conf
A study on secure pilot signal design for OFDM systems.
APSIPA
Kenta Umebayashi, F. Nakabayashi, Yasuo Suzuki
2014 — conf
Analysis of the Effect of Nonlinear Low Noise Amplifier with Memory for Wideband Spectrum Sensing.
5GU
Attaphongse Taparugssanagorn, Kenta Umebayashi, Janne J. Lehtomäki, Carlos A. Pomalaza-Raez
2014 — conf
Cooperative source number estimation for cognitive radio networks.
ICOIN
Samuli Tiiro, Kenta Umebayashi, Yasuo Suzuki
2014 J jnl
Detection Method of Same Spreading Code Signals by Multimodulus Algorithm.
IEICE Trans. Commun.
Kenta Umebayashi, Genichiro Murata, Yasuo Suzuki
2014 — conf
Development of a measurement system for spectrum awareness.
5GU
Kenta Umebayashi, Samuli Tiiro, Janne J. Lehtomäki
2014 — conf
Duty cycle and noise floor estimation with welch FFT for spectrum usage measurements.
CrownCom
Kenta Umebayashi, Ryota Takagi, Naoki Ioroi, Yasuo Suzuki, Janne J. Lehtomäki
2014 J jnl
Spectrum Sharing in MIMO Cognitive Radio Systems with Imperfect Channel State Information.
IEICE Trans. Commun.
Samuli Tiiro, Kenta Umebayashi, Janne J. Lehtomäki, Yasuo Suzuki
2013 — conf
A study on detection method of same spreading code signals by multimodulus algorithm.
ICOIN
Genichiro Murata, Kenta Umebayashi, Yasuo Suzuki
2013 — conf
A study on stream assignment method for secure MIMO communication.
ICOIN
Satoru Shimosaka, Kenta Umebayashi, Yasuo Suzuki
2013 J jnl
Analysis of Cognitive Radio Networks with Imperfect Sensing.
IEICE Trans. Commun.
Isameldin Suliman, Janne J. Lehtomäki, Kenta Umebayashi, Marcos D. Katz
2013 B conf
Blind channel order and delay timing estimation in autonomous decentralized network using asynchronous DS-CDMA.
PIMRC
Tokihito Watanabe, Kenta Umebayashi, Yasuo Suzuki
2013 J jnl
Detection of the Number of Signals with Fewer Sensors than Sources.
IEICE Trans. Commun.
Masashi Tsuji, Kenta Umebayashi, Yasuo Suzuki
2013 J jnl
On the Measurement of Duty Cycle and Channel Occupancy Rate.
IEEE J. Sel. Areas Commun.
Janne J. Lehtomäki, Risto Vuohtoniemi, Kenta Umebayashi
2013 B conf
Power control method for MIMO-based cognitive radio with imperfect channel state information.
WCNC
Samuli Tiiro, Kenta Umebayashi, Yasuo Suzuki
2013 B conf
Robust multiple hypothesis testing approach for dynamic spectrum sharing.
PIMRC
Takashi Miura, Kenta Umebayashi, Yasuo Suzuki, Janne J. Lehtomäki
2013 B conf
Study on spectrum sharing method based on distance estimation for cognitive radio networks.
GLOBECOM
Kenta Umebayashi, Janne J. Lehtomäki, Yasuo Suzuki
2012 J jnl
Analysis of Optimal Weighted Cooperative Spectrum Sensing with Multiple Antenna Elements.
IEICE Trans. Commun.
Kenta Umebayashi, Hironori Tsuchiya, Yasuo Suzuki
2012 — conf
Analysis of optimal weighted cooperative spectrum sensing based on estimation of primary user signal power.
SPAWC
Kenta Umebayashi, Yasuo Suzuki
2012 — conf
Duty cycle and channel occupancy rate estimation with MED-FCME LAD ACC.
CrownCom
Janne J. Lehtomäki, Risto Vuohtoniemi, Kenta Umebayashi
2012 J jnl
Efficient Decision Fusion for Cooperative Spectrum Sensing Based on OR-rule.
IEEE Trans. Wirel. Commun.
Kenta Umebayashi, Janne J. Lehtomäki, Takanao Yazawa, Yasuo Suzuki
2012 J jnl
Energy Detection Based Estimation of Channel Occupancy Rate with Adaptive Noise Estimation.
IEICE Trans. Commun.
Janne J. Lehtomäki, Risto Vuohtoniemi, Kenta Umebayashi, Juha-Pekka Mäkelä
2012 B conf
Study on efficient decision fusion in OR-rule based cooperative spectrum sensing.
WCNC
Kenta Umebayashi, Janne J. Lehtomäki, Yasuo Suzuki
2011 J jnl
A New Blind Beamforming and Hop-Timing Detection for FH Communications.
IEICE Trans. Commun.
Abdul Malik Nazari, Yukihiro Kamiya, Ko Shojima, Kenta Umebayashi, Yasuo Suzuki
2011 B conf
Cyclostationary spectrum sensing under four-level hypothesis for spectrum sharing.
PIMRC
Kenta Umebayashi, Janne J. Lehtomäki, Shinya Hatakeyama, Yasuo Suzuki
2011 — conf
Dynamic selection of CWmin in cognitive radio networks for protecting IEEE 802.11 primary users.
CrownCom
Kenta Umebayashi, Yasuo Suzuki, Janne J. Lehtomäki
2011 — conf
Performance evaluation of limited feedback transmit precoding via phase rotation in correlated MIMO channel.
WCSP
Sho Furuichi, Kenta Umebayashi, Yasuo Suzuki
2011 — conf
Spectrum sensing in public safety applications: The 2-D LAD ACC method.
CrownCom
Johanna Vartiainen, Janne J. Lehtomäki, Timo Bräysy, Kenta Umebayashi
2010 J jnl
Accurate Estimation of the Number of Weak Coherent Signals.
IEICE Trans. Commun.
Masashi Tsuji, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki
2010 J jnl
On the Selection of the Best Detection Performance Sensors for Cognitive Radio Networks.
IEEE Signal Process. Lett.
Zaheer Khan, Janne J. Lehtomäki, Kenta Umebayashi, Johanna Vartiainen
2010 J jnl
Two-Dimensional Signal Localization Algorithm for Spectrum Sensing.
IEICE Trans. Commun.
Johanna Vartiainen, Janne J. Lehtomäki, Harri Saarnisaari, Markku J. Juntti, Kenta Umebayashi
2009 B conf
A Novel Spectrum Sharing Technique Based on Channel Occupancy Rate Information.
GLOBECOM
Kenta Umebayashi, Kohei Kasahara, Yukihiro Kamiya, Yasuo Suzuki
2009 B conf
An application of adaptive array antennas for wireless ad hoc networks based on FIA.
PIMRC
Masahisa Konno, Yukihiro Kamiya, Kenta Umebayashi, Yasuo Suzuki
2009 B conf
Analysis of cognitive radio networks with imperfect sensing.
PIMRC
Isameldin Suliman, Janne J. Lehtomäki, Timo Bräysy, Kenta Umebayashi
2009 J jnl
Teletraffic Analysis of Direct Communication with Clustering.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Janne J. Lehtomäki, Isameldin Suliman, Kenta Umebayashi, Yasuo Suzuki
2009 B conf
Transmit power selection by cooperative sensing in cognitive radio networks.
WCNC
Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki, Janne J. Lehtomäki
2008 J jnl
A New Blind Adaptive Array Antenna Based on CMA Criteria for M-Ary/SS Signals Suitable for Software Defined Radio Architecture.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Miho Kozuma, Atsushi Sasaki, Yukihiro Kamiya, Takeo Fujii, Kenta Umebayashi, Yasuo Suzuki
2008 B conf
A new adaptive array antenna application for personal area networks based on cross-degree of freedom concept.
PIMRC
Shota Uehara, Naoto Matsushita, Yukihiro Kamiya, Kenta Umebayashi, Yasuo Suzuki
2008 B conf
A new efficient and robust MAC protocol against multipath fading for ad hoc networks.
PIMRC
Shingo Watanabe, Yukihiro Kamiya, Kenta Umebayashi, Yasuo Suzuki
2008 J jnl
Dialogue-Based Broadcasting Protocol for Wireless Ad Hoc Networks.
IEICE Trans. Fundam. Electron. Commun. Comput. Sci.
Keigo Hasegawa, Takeo Fujii, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki
2008 J jnl
Frequency sharing hotspot communication under uplink multi-carrier CDMA cellular system.
Wirel. Commun. Mob. Comput.
Nguyen Tran Khoa, Takeo Fujii, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki
2008 J jnl
Study on Soft Decision Based Cooperative Sensing for Cognitive Radio Networks.
IEICE Trans. Commun.
Hiromasa Uchiyama, Kenta Umebayashi, Takeo Fujii, Fumie Ono, Kei Sakaguchi, Yukihiro Kamiya, Yasuo Suzuki
2008 B conf
Study on cooperative sensing based on miss detection criteria.
PIMRC
Kenta Umebayashi, Janne J. Lehtomäki, Yukihiro Kamiya, Yasuo Suzuki
2007 B conf
A New Approach for Blind Frequency-Hopping Detection using Adaptive Array Antenna based on CMA.
PIMRC
Abdul Malik Nazari, Ko Shojima, Yukihiro Kamiya, Kenta Umebayashi, Yasuo Suzuki
2007 B conf
Channel Assignment based on Iterative Exchange in Wireless Ad-Hoc Networks.
PIMRC
Kenta Umebayashi, Ulrico Celentano, Yasuo Suzuki
2007 B conf
Study on Cooperative Sensing in Cognitive Radio based AD-HOC Network.
PIMRC
Hiromasa Uchiyama, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki, Takeo Fujii, Fumie Ono, Kei Sakaguchi
2006 — conf
Analysis of Minimum Hellinger Distance Identification for Digital Phase Modulation.
ICC
Kenta Umebayashi, Janne J. Lehtomäki, Keijo Ruotsalainen
2002 B conf
Secure download system based on software defined radio composed of FPGAs.
PIMRC
Himnon Uchikawa, Kenta Umebayashi, Ryuji Kohno
2000 B conf
Blind adaptive estimation of modulation scheme for software defined radio.
PIMRC
Kenta Umebayashi, Satoru Ishii, Ryuji Kohno