Kenta UMEBAYASHI


Welch FFT Segment Size Selection Method for Spectrum Awareness System
Hiroki IWATA Kenta UMEBAYASHI Samuli TIIRO Janne J. LEHTOMÄKI Miguel LÓPEZ-BENÍTEZ Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/08/01
Vol. E99-B  No. 8  pp. 1813-1823
Type of Manuscript:  PAPER
Category: Fundamental Theories for Communications
Keyword: 
cognitive radioduty cycledynamic spectrum accessspectrum measurementWelch FFT
 Summary | Full Text:PDF(1.9MB)

Simple Primary User Signal Area Estimation for Spectrum Measurement
Kenta UMEBAYASHI Kazuki MORIWAKI Riki MIZUCHI Hiroki IWATA Samuli TIIRO Janne J. LEHTOMÄKI Miguel LÓPEZ-BENÍTEZ Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/02/01
Vol. E99-B  No. 2  pp. 523-532
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
dynamic spectrum accesssmart spectrum accessspectrum measurementcognitive radiosignal detectionsignal area estimation
 Summary | Full Text:PDF(2.7MB)

Spectrum Sharing in MIMO Cognitive Radio Systems with Imperfect Channel State Information
Samuli TIIRO Kenta UMEBAYASHI Janne LEHTOMÄKI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/04/01
Vol. E97-B  No. 4  pp. 867-874
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
cognitive radioimperfect channel state informationinterference cancellationMIMOspectrum sharing
 Summary | Full Text:PDF(1.1MB)

Detection Method of Same Spreading Code Signals by Multimodulus Algorithm
Kenta UMEBAYASHI Genichiro MURATA Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2014/04/01
Vol. E97-B  No. 4  pp. 807-816
Type of Manuscript:  PAPER
Category: Wireless Communication Technologies
Keyword: 
CDMARAKE combinermultiple user interferencemultimodulus algorithm
 Summary | Full Text:PDF(2.2MB)

Detection of the Number of Signals with Fewer Sensors than Sources
Masashi TSUJI Kenta UMEBAYASHI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/09/01
Vol. E96-B  No. 9  pp. 2235-2243
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
detection of the number of signalsnested arraysdegrees of freedomDOA estimationarray signal processing
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Analysis of Cognitive Radio Networks with Imperfect Sensing
Isameldin Mohammed SULIMAN Janne J. LEHTOMÄKI Kenta UMEBAYASHI Marcos KATZ 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2013/06/01
Vol. E96-B  No. 6  pp. 1605-1615
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
cognitive radiosperformance analysiscontinuous time Markov chainstate dependent transition ratesimperfect sensingmulti-channel support
 Summary | Full Text:PDF(1.9MB)

Analysis of Optimal Weighted Cooperative Spectrum Sensing with Multiple Antenna Elements
Kenta UMEBAYASHI Hironori TSUCHIYA Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/10/01
Vol. E95-B  No. 10  pp. 3261-3269
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
cognitive radiocooperative spectrum sensingNeyman-Pearson theoremmultiple antenna elements
 Summary | Full Text:PDF(1.4MB)

Energy Detection Based Estimation of Channel Occupancy Rate with Adaptive Noise Estimation
Janne J. LEHTOMAKI Risto VUOHTONIEMI Kenta UMEBAYASHI Juha-Pekka MAKELA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/04/01
Vol. E95-B  No. 4  pp. 1076-1084
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Heterogeneous Wireless Networks in Conjunction with Main Topics of CrownCom2011)
Category: 
Keyword: 
occupancy measurementscognitive radiowireless LAN
 Summary | Full Text:PDF(1MB)

A New Blind Beamforming and Hop-Timing Detection for FH Communications
Abdul Malik NAZARI Yukihiro KAMIYA Ko SHOJIMA Kenta UMEBAYASHI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2011/05/01
Vol. E94-B  No. 5  pp. 1234-1242
Type of Manuscript:  Special Section PAPER (Special Section on Antenna and Propagation Technologies Contributing to Diversification of Wireless Technologies)
Category: Adaptive Array Antennas
Keyword: 
array signal processingconstant modulus algorithmfading channelfrequency hopping communicationshop-timing
 Summary | Full Text:PDF(898.4KB)

Two-Dimensional Signal Localization Algorithm for Spectrum Sensing
Johanna VARTIAINEN Janne LEHTOMAKI Harri SAARNISAARI Markku Juntti  Kenta UMEBAYASHI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/11/01
Vol. E93-B  No. 11  pp. 3129-3136
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
narrowband signalssignal sensing
 Summary | Full Text:PDF(652.4KB)

Accurate Estimation of the Number of Weak Coherent Signals
Masashi TSUJI Kenta UMEBAYASHI Yukihiro KAMIYA Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2010/10/01
Vol. E93-B  No. 10  pp. 2715-2724
Type of Manuscript:  PAPER
Category: Antennas and Propagation
Keyword: 
source number estimationarray signal processingDOA estimationcoherent signalseigendecompositionQR decomposition
 Summary | Full Text:PDF(1.3MB)

Teletraffic Analysis of Direct Communication with Clustering
Janne LEHTOMAKI Isameldin SULIMAN Kenta UMEBAYASHI Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/05/01
Vol. E92-A  No. 5  pp. 1356-1362
Type of Manuscript:  PAPER
Category: Communication Theory and Signals
Keyword: 
clusteringdirect communicationtwo dimensional
 Summary | Full Text:PDF(436.7KB)

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 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/08/01
Vol. E91-A  No. 8  pp. 1982-1989
Type of Manuscript:  Special Section PAPER (Special Section on Signal Processing)
Category: 
Keyword: 
blind signal processingM-ary/SSadaptive array antenna
 Summary | Full Text:PDF(796.9KB)

Dialogue-Based Broadcasting Protocol for Wireless Ad Hoc Networks
Keigo HASEGAWA Takeo FUJII Kenta UMEBAYASHI Yukihiro KAMIYA Yasuo SUZUKI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/07/01
Vol. E91-A  No. 7  pp. 1642-1651
Type of Manuscript:  Special Section PAPER (Special Section on Multi-dimensional Mobile Information Networks)
Category: 
Keyword: 
ad hoc networkbroadcastingbroadcast storm problemmulti-hop network
 Summary | Full Text:PDF(790.5KB)

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 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2008/01/01
Vol. E91-B  No. 1  pp. 95-101
Type of Manuscript:  Special Section PAPER (Special Section on Cognitive Radio and Spectrum Sharing Technology)
Category: Spectrum Sensing
Keyword: 
cognitive radiocooperative sensingenergy detectioncognitive MIMO mesh network
 Summary | Full Text:PDF(392.8KB)

Method of Non-Data-Aided Carrier Recovery with Modulation Identification
Kenta UMEBAYASHI Robert H. MORELOS-ZARAGOZA Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/03/01
Vol. E87-A  No. 3  pp. 656-665
Type of Manuscript:  Special Section PAPER (Special Section on Applications and Implementations of Digital Signal Processing)
Category: Communication Theory and Systems
Keyword: 
software defined radiocarrier recoverydigital PLLmodulation identification
 Summary | Full Text:PDF(1.1MB)

Secure Download System Based on Software Defined Radio Composed of FPGAs
Hironori UCHIKAWA Kenta UMEBAYASHI Ryuji KOHNO 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/12/01
Vol. E85-B  No. 12  pp. 2601-2609
Type of Manuscript:  Special Section PAPER (Special Issue on Software Defined Radio Technology and Its Applications)
Category: 
Keyword: 
downloadsecurityfield programmable gate array (FPGA)software defined radio (SDR)
 Summary | Full Text:PDF(717.5KB)