Hiroo SEKIYA


Small-World-Network Model Based Routing Method for Wireless Sensor Networks
Nobuyoshi KOMURO Sho MOTEGI Kosuke SANADA Jing MA Zhetao LI Tingrui PEI Young-June CHOI Hiroo SEKIYA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/11/01
Vol. E99-B  No. 11  pp. 2315-2322
Type of Manuscript:  Special Section PAPER (Special Section on Deepening and Expanding of Information Network Science)
Category: 
Keyword: 
sensor networkhub nodedata collectionsmall worldWatts and Strogatz modeldelaynetwork lifetime
 Summary | Full Text:PDF(1.5MB)

Design and Analysis of Multi-Channel MAC Protocol with Channel Grouping in Wireless Ad-Hoc Networks
Nobuyoshi KOMURO Ryo MANZOKU Kosuke SANADA Jing MA Zhetao LI Tingrui PEI Young-June CHOI Hiroo SEKIYA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/11/01
Vol. E99-B  No. 11  pp. 2305-2314
Type of Manuscript:  Special Section PAPER (Special Section on Deepening and Expanding of Information Network Science)
Category: 
Keyword: 
multi-channelchannel groupingcontrol channelmultiple rendezvousthroughput analysis
 Summary | Full Text:PDF(1.9MB)

Throughput Analysis of WLANs in Saturation and Non-Saturation Heterogeneous Conditions with Airtime Concept
Yin WAN Kosuke SANADA Nobuyoshi KOMURO Gen MOTOYOSHI Norio YAMAGAKI Shigeo SHIODA Shiro SAKATA Tutomu MURASE Hiroo SEKIYA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2016/11/01
Vol. E99-B  No. 11  pp. 2289-2296
Type of Manuscript:  Special Section PAPER (Special Section on Deepening and Expanding of Information Network Science)
Category: 
Keyword: 
WLANthroughputanalysisframe lengthoffered loadheterogeneous conditions
 Summary | Full Text:PDF(1.9MB)

End-to-End Delay Analysis for IEEE 802.11 String-Topology Multi-Hop Networks
Kosuke SANADA Jin SHI Nobuyoshi KOMURO Hiroo SEKIYA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2015/07/01
Vol. E98-B  No. 7  pp. 1284-1293
Type of Manuscript:  PAPER
Category: Fundamental Theories for Communications
Keyword: 
IEEE 802.11string topologyVANETsmulti-hop networksend-to-end delay analysisMAC layer
 Summary | Full Text:PDF(1.3MB)

MAC Protocol for Ad Hoc Networks Using Smart Antennas for Mitigating Hidden and Deafness Problems
Jing MA Hiroo SEKIYA Atsushi NAGASAKI Nobuyoshi KOMURO Shiro SAKATA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2012/11/01
Vol. E95-B  No. 11  pp. 3545-3555
Type of Manuscript:  PAPER
Category: Terrestrial Wireless Communication/Broadcasting Technologies
Keyword: 
smart antennasad hoc networksDMACpulse/tone
 Summary | Full Text:PDF(1.6MB)

Analysis and Experiments of Maximum Throughput in Wireless Multi-Hop Networks for VoIP Application
Masahiko INABA Yoshihiro TSUCHIYA Hiroo SEKIYA Shiro SAKATA Kengo YAGYU 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2009/11/01
Vol. E92-B  No. 11  pp. 3422-3431
Type of Manuscript:  PAPER
Category: Network
Keyword: 
wireless multi-hop networksIEEE 802.11throughput analysisvoice over IP
 Summary | Full Text:PDF(947.8KB)

Design of Class DE Amplifier with Nonlinear Shunt Capacitances for Any Output Q
Toru EZAWA Hiroo SEKIYA Takashi YAHAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2008/04/01
Vol. E91-A  No. 4  pp. 927-934
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 20th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
class DE amplifierclass E switchingnonlinear capacitance on MOSFETquality factorSPICE simulationsgrading coefficient
 Summary | Full Text:PDF(785.6KB)

Design of Class DE Inverter with Second Order Constant K Band-Pass Filter
Motoki KATAYAMA Hiroyuki HASE Hiroo SEKIYA Jianming LU Takashi YAHAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2007/10/01
Vol. E90-A  No. 10  pp. 2132-2140
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and its Applications)
Category: Nonlinear Circuits
Keyword: 
class DE invertersecond order constant K band-pass filterclass E switchingzero voltage switching
 Summary | Full Text:PDF(903KB)

Investigation of Class E Amplifier with Nonlinear Capacitance for Any Output Q and Finite DC-Feed Inductance
Hiroo SEKIYA Yoji ARIFUKU Hiroyuki HASE Jianming LU Takashi YAHAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/04/01
Vol. E89-A  No. 4  pp. 873-881
Type of Manuscript:  Special Section PAPER (Special Section on Selected Papers from the 18th Workshop on Circuits and Systems in Karuizawa)
Category: 
Keyword: 
class E amplifiernonlinear capacitance on MOSFETquality factorDC-feed inductanceSPICE simulations
 Summary | Full Text:PDF(827.1KB)

Novel Design Procedure for MOSFET Class E Oscillator
Hiroyuki HASE Hiroo SEKIYA Jianming LU Takashi YAHAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/09/01
Vol. E87-A  No. 9  pp. 2241-2247
Type of Manuscript:  Special Section PAPER (Special Section on Nonlinear Theory and its Applications)
Category: 
Keyword: 
class E oscillatordesign procedurefree-running oscillatornumerical calculationclass E switching conditions
 Summary | Full Text:PDF(680.4KB)

A Compensating Method Based on SOM for Nonlinear Distortion in 16-QAM-OFDM System
Xiaoqiu WANG Hua LIN Jianming LU Hiroo SEKIYA Takashi YAHAGI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/06/01
Vol. E87-A  No. 6  pp. 1641-1644
Type of Manuscript:  LETTER
Category: Nonlinear Problems
Keyword: 
OFDMself-organizing mapnonlinear distortion
 Summary | Full Text:PDF(141.9KB)

Exact Analysis of Class DE Amplifier with FM and PWM Control
Hiroo SEKIYA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/10/01
Vol. E86-B  No. 10  pp. 3082-3093
Type of Manuscript:  PAPER
Category: Energy in Electronics Communications
Keyword: 
class DE amplifierFM controlPWM controlexact analysis
 Summary | Full Text:PDF(963.4KB)