Kenta Umebayashi

ORCID

Publication Activity (10 Years)

Years Active: 2000-2023
Publications (10 Years): 61

Top Venues

Publications

Kenta Umebayashi, Yoshiki Kasahara, Hiroki Iwata, Ahmed Al-Tahmeesschi, Johanna Vartiainen
Spectrum Occupancy Prediction based on adaptive Recurrent Neural Networks. WCNC (2023)
Zhaona Wu, Kenta Umebayashi, Janne Lehtomäki, Nizar Zorba
Device-to-device Communications at the Terahertz Band: Open Challenges for Realistic Implementation. IEEE Commun. Stand. Mag. 7 (1) (2023)
Shun Ishihara, Kenta Umebayashi, Janne J. Lehtomäki
Energy Detection for M-QAM Signals. IEEE Access 11 (2023)
Doaa Abdelhameed, Kenta Umebayashi, Italo Atzeni, Antti Tölli
Enhanced Signal Detection and Constellation Design for Massive SIMO Communications With 1-Bit ADCs. IEEE Access 11 (2023)
Janne Lehtomäki, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Markku J. Juntti
Distance Estimation Based on Molecular Absorption at THz Frequencies. GLOBECOM (Workshops) (2022)
Su Pyae Sone, Janne Lehtomäki, Zaheer Khan, Kenta Umebayashi, Zunera Javed
Proactive Radar Protection System in Shared Spectrum via Forecasting Secondary User Power Levels. IEEE Access 10 (2022)
Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Janne Lehtomäki
High-Efficiency FCME-Based Noise Power Estimation for Long-Term and Wide-Band Spectrum Measurements. IEEE Access 9 (2021)
Mohannad Alzard, Saud Althunibat, Kenta Umebayashi, Nizar Zorba
Resource Allocation in THz-based Subcarrier Index Modulation Systems for Mobile Users. GLOBECOM (2021)
Haesik Kim, Takeo Fujii, Kenta Umebayashi
Relay Nodes Selection Using Reinforcement Learning. ICAIIC (2021)
Ahmed Al-Tahmeesschi, Kenta Umebayashi, Hiroki Iwata, Janne Lehtomäki, Miguel López-Benítez
Feature-Based Deep Neural Networks for Short-Term Prediction of WiFi Channel Occupancy Rate. IEEE Access 9 (2021)
Su Pyae Sone, Janne Lehtomäki, Zaheer Khan, Kenta Umebayashi
Forecasting Wireless Network Traffic and Channel Utilization Using Real Network/Physical layer Data. EuCNC/6G Summit (2021)
Doaa Abdelhameed, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Italo Atzeni, Antti Tölli
Enhanced Signal Detection for Massive SIMO Communications with 1-Bit ADCs. SPAWC (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)
Mohannad Alzard, Saud Althunibat, Kenta Umebayashi, Nizar Zorba
Performance Analysis of Resource Allocation in THz-Based Subcarrier Index Modulation Systems for Mobile Users. IEEE Access 9 (2021)
Zhaona Wu, Hiroto Ebisawa, Kenta Umebayashi, Janne Lehtomäki, Nizar Zorba
Time Domain Propagation Characteristics with Causal Channel Model for Terahertz Band. ICC Workshops (2021)
Shun Ishihara, Kenta Umebayashi, Janne Lehtomäki
Energy Detection for M-QAM Signals. VTC Spring (2021)
Kenta Umebayashi, Yoshimasa Kimoto, Antti Tölli
Adaptive Antenna Array with weight and antenna space control. WCNC (2020)
Ogeen H. Toma, Miguel López-Benítez, Dhaval K. Patel, Kenta Umebayashi
Reconstruction Algorithm for Primary Channel Statistics Estimation Under Imperfect Spectrum Sensing. WCNC (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)
Miguel López-Benítez, Ogeen H. Toma, Dhaval K. Patel, Kenta Umebayashi
Sample Size Analysis of Energy Detection under Fading Channels. WCNC Workshops (2020)
Miguel López-Benítez, Ogeen H. Toma, Dhaval K. Patel, Kenta Umebayashi
Methods for Fast Estimation of Primary Activity Statistics in Cognitive Radio Systems. WCNC (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)
Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Satya Joshi, Miguel López-Benítez, Janne J. Lehtomäki
A Study on High-Efficiency Energy Detection-Based Spectrum Measurements. WCNC Workshops (2020)
Prashant Kumar Shah, Krishna Joshi, Satya Joshi, Antti Tölli, Kenta Umebayashi
Direct Beamformer Estimation for Hybrid Architecture in mmWave Dynamic TDD System. WCNC Workshops (2020)
Ogeen H. Toma, Miguel López-Benítez, Dhaval K. Patel, Kenta Umebayashi
Estimation of Primary Channel Activity Statistics in Cognitive Radio Based on Imperfect Spectrum Sensing. IEEE Trans. Commun. 68 (4) (2020)
Ahmed Al-Tahmeesschi, Kenta Umebayashi, Hiroki Iwata, Miguel López-Benítez, Janne Lehtomäki
Applying Deep Neural Networks for Duty Cycle Estimation. WCNC (2020)
Kenta Umebayashi
Spectrum usage model for smart spectrum. ICCC Workshops (2019)
Shusuke Narieda, Daiki Cho, Kenta Umebayashi, Hiroshi Naruse
Statistics Shared CAF Diversity Combining Based Sensing Using Weight Computation Technique. ICAIIC (2019)
Kenta Inagaki, Shusuke Narieda, Takeo Fujii, Kenta Umebayashi, Hiroshi Naruse
Measurements of LoRa Propagation in Harsh Environment: Numerous NLOS Areas and Ill-Conditioned LoRa Gateway. VTC Fall (2019)
Kazuhiro Tsujimura, Kenta Umebayashi, Joonas Kokkoniemi, Janne Lehtomäki
Time Domain Channel Model for the THz Band. ISWCS (2019)
Kenta Umebayashi, Yoshitaka Tamaki, Miguel López-Benítez, Janne J. Lehtomäki
Design of Spectrum Usage Detection in Wideband Spectrum Measurements. IEEE Access 7 (2019)
Miguel López-Benítez, Janne Lehtomäki, Kenta Umebayashi, Dhaval Patel
Accurate Noise Floor Calibration based on Modified Expectation Maximisation of Gaussian Mixture. WCNC (2019)
Ogeen H. Toma, Miguel López-Benítez, Dhaval K. Patel, Kenta Umebayashi
Primary Channel Duty Cycle Estimation under Imperfect Spectrum Sensing Based on Mean Channel Periods. GLOBECOM (2019)
Shusuke Narieda, Daiki Cho, Hiromichi Ogasawara, Kenta Umebayashi, Takeo Fujii, Hiroshi Naruse
Derivation of Sensing Features for Maximum Cyclic Autocorrelation Selection Based Signal Detection. VTC Fall (2019)
Miguel López-Benítez, Ahmed Al-Tahmeesschi, Dhaval K. Patel, Janne J. Lehtomäki, Kenta Umebayashi
Estimation of Primary Channel Activity Statistics in Cognitive Radio Based on Periodic Spectrum Sensing Observations. IEEE Trans. Wirel. Commun. 18 (2) (2019)
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Dhaval K. Patel, Janne Lehtomäki, Kenta Umebayashi
On the Sample Size for the Estimation of Primary Activity Statistics Based on Spectrum Sensing. IEEE Trans. Cogn. Commun. Netw. 5 (1) (2019)
Shusuke Narieda, Takeo Fujii, Kenta Umebayashi
Effect of LBT Time on LoRa Network Performance: Signal Detection Theorem Based Analyses. DySPAN (2019)
Hiroki Iwata, Kenta Umebayashi, Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki
Time and Frequency Varying Noise Floor Estimation for Spectrum Usage Measurement. WCNC Workshops (2019)
Hiroki Iwata, Kenta Umebayashi, Janne J. Lehtomäki, Shusuke Narieda
Welch FFT Segment Size Selection Method for FFT Based Wide Band Spectrum Measurement. IEICE Trans. Commun. (7) (2018)
Kazuhiro Tsujimura, Kenta Umebayashi, Joonas Kokkoniemi, Janne Lehtomäki
A study on impulse response model of reflected path for THz band. APSIPA (2018)
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi
Accurate estimation of primary user traffic based on periodic spectrum sensing. WCNC (2018)
Kenta Umebayashi, Miguel López-Benítez
A study on time domain deterministic-stochastic model of spectrum usage in WLAN. WCNC (2018)
Kenta Umebayashi, Masanao Kobayashi, Miguel López-Benítez
Efficient Time Domain Deterministic-Stochastic Model of Spectrum Usage. IEEE Trans. Wirel. Commun. 17 (3) (2018)
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi
Improving primary statistics prediction under imperfect spectrum sensing. WCNC (2018)
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Valerio Selis, Dhaval K. Patel, Kenta Umebayashi
Cooperative Estimation of Primary Traffic Under Imperfect Spectrum Sensing and Byzantine Attacks. IEEE Access 6 (2018)
Kenta Umebayashi, Kazuhiro Hayashi, Janne J. Lehtomäki
Threshold-Setting for Spectrum Sensing Based on Statistical Information. IEEE Commun. Lett. 21 (7) (2017)
Riki Mizuchi, Kenta Umebayashi, Janne J. Lehtomäki, Miguel López-Benítez
A Study on False Alarm Cancellation for Spectrum Usage Measurements. WCNC Workshops (2017)
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi
Investigating the Estimation of Primary Occupancy Patterns under Imperfect Spectrum Sensing. WCNC Workshops (2017)
Ahmed Al-Tahmeesschi, Miguel López-Benítez, Kenta Umebayashi, Janne J. Lehtomäki
Analytical study on the estimation of primary activity distribution based on spectrum sensing. PIMRC (2017)
Miguel López-Benítez, Ahmed Al-Tahmeesschi, Kenta Umebayashi, Janne J. Lehtomäki
PECAS: A Low-Cost Prototype for the Estimation of Channel Activity Statistics in Cognitive Radio. WCNC (2017)
Kenta Umebayashi, Hiroki Iwata, Janne J. Lehtomäki, Miguel López-Benítez
Study on simple signal area estimation for efficient spectrum measurements. EuCNC (2017)
Takeo Fujii, Kenta Umebayashi
Smart Spectrum for Future Wireless World. IEICE Trans. Commun. (9) (2017)
Kenta Umebayashi, Kazuki Moriwaki, Riki Mizuchi, Hiroki Iwata, Samuli Tiiro, Janne J. Lehtomäki, Miguel López-Benítez, Yasuo Suzuki
Simple Primary User Signal Area Estimation for Spectrum Measurement. IEICE Trans. Commun. (2) (2016)
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki
A study on Welch FFT segment size selection method for spectrum awareness. WCNC Workshops (2016)
Kenta Umebayashi, Janne J. Lehtomäki, Isameldin Suliman
Analysis of transmit power setting technique for cognitive radio networks. EURASIP J. Wirel. Commun. Netw. 2016 (2016)
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Janne J. Lehtomäki, Miguel López-Benítez, Yasuo Suzuki
Welch FFT Segment Size Selection Method for Spectrum Awareness System. IEICE Trans. Commun. (8) (2016)
Miguel López-Benítez, Janne J. Lehtomäki, Kenta Umebayashi, Fernando Casadevall
Smart Spectrum Technologies for Mobile Information Systems. Mob. Inf. Syst. 2016 (2016)
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki
A study on Welch FFT segment size selection method for spectrum awareness. WCNC (2016)
Daiki Cho, Atsushi Kondo, Shusuke Narieda, Kenta Umebayashi
CAF Diversity Combining for Spectrum Sensing by Test Statistics Sharing with Time-Averaged Weights. VTC Fall (2016)
Isameldin Suliman, Janne J. Lehtomäki, Kenta Umebayashi
On the effect of false alarm rate on the performance of cognitive radio networks. EURASIP J. Wirel. Commun. Netw. 2015 (2015)
Janne J. Lehtomäki, Miguel López-Benítez, Kenta Umebayashi, Markku J. Juntti
Improved Channel Occupancy Rate Estimation. IEEE Trans. Commun. 63 (3) (2015)
Hiroki Iwata, Kenta Umebayashi, Samuli Tiiro, Yasuo Suzuki, Janne J. Lehtomäki
Optimum welch FFT segment size for duty cycle estimation in spectrum awareness system. WCNC Workshops (2015)
Kenta Umebayashi, F. Nakabayashi, Yasuo Suzuki
A study on secure pilot signal design for OFDM systems. APSIPA (2014)
Samuli Tiiro, Kenta Umebayashi, Yasuo Suzuki
Cooperative source number estimation for cognitive radio networks. ICOIN (2014)
Attaphongse Taparugssanagorn, Kenta Umebayashi, Janne J. Lehtomäki, Carlos A. Pomalaza-Raez
Analysis of the Effect of Nonlinear Low Noise Amplifier with Memory for Wideband Spectrum Sensing. 5GU (2014)
Samuli Tiiro, Kenta Umebayashi, Janne J. Lehtomäki, Yasuo Suzuki
Spectrum Sharing in MIMO Cognitive Radio Systems with Imperfect Channel State Information. IEICE Trans. Commun. (4) (2014)
Kenta Umebayashi, Ryota Takagi, Naoki Ioroi, Yasuo Suzuki, Janne J. Lehtomäki
Duty cycle and noise floor estimation with welch FFT for spectrum usage measurements. CrownCom (2014)
Kenta Umebayashi, Genichiro Murata, Yasuo Suzuki
Detection Method of Same Spreading Code Signals by Multimodulus Algorithm. IEICE Trans. Commun. (4) (2014)
Kenta Umebayashi, Samuli Tiiro, Janne J. Lehtomäki
Development of a measurement system for spectrum awareness. 5GU (2014)
Seiya Kato, Kenta Umebayashi, Yasuo Suzuki
A study on detection of receiving signal status change with array antenna. ICOIN (2014)
Satoru Shimosaka, Kenta Umebayashi, Yasuo Suzuki
A study on stream assignment method for secure MIMO communication. ICOIN (2013)
Takashi Miura, Kenta Umebayashi, Yasuo Suzuki, Janne J. Lehtomäki
Robust multiple hypothesis testing approach for dynamic spectrum sharing. PIMRC (2013)
Samuli Tiiro, Kenta Umebayashi, Yasuo Suzuki
Power control method for MIMO-based cognitive radio with imperfect channel state information. WCNC (2013)
Masashi Tsuji, Kenta Umebayashi, Yasuo Suzuki
Detection of the Number of Signals with Fewer Sensors than Sources. IEICE Trans. Commun. (9) (2013)
Janne J. Lehtomäki, Risto Vuohtoniemi, Kenta Umebayashi
On the Measurement of Duty Cycle and Channel Occupancy Rate. IEEE J. Sel. Areas Commun. 31 (11) (2013)
Kenta Umebayashi, Janne J. Lehtomäki, Yasuo Suzuki
Study on spectrum sharing method based on distance estimation for cognitive radio networks. GLOBECOM (2013)
Genichiro Murata, Kenta Umebayashi, Yasuo Suzuki
A study on detection method of same spreading code signals by multimodulus algorithm. ICOIN (2013)
Tokihito Watanabe, Kenta Umebayashi, Yasuo Suzuki
Blind channel order and delay timing estimation in autonomous decentralized network using asynchronous DS-CDMA. PIMRC (2013)
Isameldin Suliman, Janne J. Lehtomäki, Kenta Umebayashi, Marcos D. Katz
Analysis of Cognitive Radio Networks with Imperfect Sensing. IEICE Trans. Commun. (6) (2013)
Kenta Umebayashi, Janne J. Lehtomäki, Takanao Yazawa, Yasuo Suzuki
Efficient Decision Fusion for Cooperative Spectrum Sensing Based on OR-rule. IEEE Trans. Wirel. Commun. 11 (7) (2012)
Kenta Umebayashi, Yasuo Suzuki
Analysis of optimal weighted cooperative spectrum sensing based on estimation of primary user signal power. SPAWC (2012)
Kenta Umebayashi, Hironori Tsuchiya, Yasuo Suzuki
Analysis of Optimal Weighted Cooperative Spectrum Sensing with Multiple Antenna Elements. IEICE Trans. Commun. (10) (2012)
Janne J. Lehtomäki, Risto Vuohtoniemi, Kenta Umebayashi, Juha-Pekka Mäkelä
Energy Detection Based Estimation of Channel Occupancy Rate with Adaptive Noise Estimation. IEICE Trans. Commun. (4) (2012)
Janne J. Lehtomäki, Risto Vuohtoniemi, Kenta Umebayashi
Duty cycle and channel occupancy rate estimation with MED-FCME LAD ACC. CrownCom (2012)
Kenta Umebayashi, Janne J. Lehtomäki, Yasuo Suzuki
Study on efficient decision fusion in OR-rule based cooperative spectrum sensing. WCNC (2012)
Sho Furuichi, Kenta Umebayashi, Yasuo Suzuki
Performance evaluation of limited feedback transmit precoding via phase rotation in correlated MIMO channel. WCSP (2011)
Johanna Vartiainen, Janne J. Lehtomäki, Timo Bräysy, Kenta Umebayashi
Spectrum sensing in public safety applications: The 2-D LAD ACC method. CrownCom (2011)
Kenta Umebayashi, Janne J. Lehtomäki, Shinya Hatakeyama, Yasuo Suzuki
Cyclostationary spectrum sensing under four-level hypothesis for spectrum sharing. PIMRC (2011)
Abdul Malik Nazari, Yukihiro Kamiya, Ko Shojima, Kenta Umebayashi, Yasuo Suzuki
A New Blind Beamforming and Hop-Timing Detection for FH Communications. IEICE Trans. Commun. (5) (2011)
Kenta Umebayashi, Yasuo Suzuki, Janne J. Lehtomäki
Dynamic selection of CWmin in cognitive radio networks for protecting IEEE 802.11 primary users. CrownCom (2011)
Johanna Vartiainen, Janne J. Lehtomäki, Harri Saarnisaari, Markku J. Juntti, Kenta Umebayashi
Two-Dimensional Signal Localization Algorithm for Spectrum Sensing. IEICE Trans. Commun. (11) (2010)
Zaheer Khan, Janne J. Lehtomäki, Kenta Umebayashi, Johanna Vartiainen
On the Selection of the Best Detection Performance Sensors for Cognitive Radio Networks. IEEE Signal Process. Lett. 17 (4) (2010)
Masashi Tsuji, Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki
Accurate Estimation of the Number of Weak Coherent Signals. IEICE Trans. Commun. (10) (2010)
Masahisa Konno, Yukihiro Kamiya, Kenta Umebayashi, Yasuo Suzuki
An application of adaptive array antennas for wireless ad hoc networks based on FIA. PIMRC (2009)
Kenta Umebayashi, Kohei Kasahara, Yukihiro Kamiya, Yasuo Suzuki
A Novel Spectrum Sharing Technique Based on Channel Occupancy Rate Information. GLOBECOM (2009)
Janne J. Lehtomäki, Isameldin Suliman, Kenta Umebayashi, Yasuo Suzuki
Teletraffic Analysis of Direct Communication with Clustering. IEICE Trans. Fundam. Electron. Commun. Comput. Sci. (5) (2009)
Isameldin Suliman, Janne J. Lehtomäki, Timo Bräysy, Kenta Umebayashi
Analysis of cognitive radio networks with imperfect sensing. PIMRC (2009)
Kenta Umebayashi, Yukihiro Kamiya, Yasuo Suzuki, Janne J. Lehtomäki
Transmit power selection by cooperative sensing in cognitive radio networks. WCNC (2009)

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Publication Activity (10 Years)

Top Topics

Top Venues

Kenta Umebayashi