Keiichiro KAGAWA


Realization of Secure Ambient Wireless Network System Based on Spatially Distributed Ciphering Function
Masashi OKADA Masahide HATANAKA Keiichiro KAGAWA Shinichi MIYAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2013/11/01
Vol. E96-A  No. 11  pp. 2182-2184
Type of Manuscript:  Special Section LETTER (Special Section on Smart Multimedia & Communication Systems)
Category: Mobile Information Network and Personal Communications
Keyword: 
ambient information societycognitive wireless networksecurityspatially distributed ciphering functionIEEE 802.15.4
 Summary | Full Text:PDF(1.3MB)

Design of a Digitally Error-Corrected Pipeline ADC Using Incomplete Settling of Pre-Charged Residue Amplifiers
Sung-Wook JUN Lianghua MIAO Keita YASUTOMI Keiichiro KAGAWA Shoji KAWAHITO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/06/01
Vol. E96-C  No. 6  pp. 828-837
Type of Manuscript:  Special Section PAPER (Special Section on Analog Circuits and Related SoC Integration Technologies)
Category: 
Keyword: 
analog-to-digital conversiondigital error correctionincomplete settling errorpre-charging technique
 Summary | Full Text:PDF(2.9MB)

Preliminary Demonstration of 1.0 V CMOS Imager with Semi-Pixel-Level ADC Based on Pulse-Width-Modulation Pixel Readout
Keiichiro KAGAWA Makoto SHOUHO Kazuo HASHIGUCHI Masahiro NUNOSHITA Jun OHTA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/10/01
Vol. E90-C  No. 10  pp. 2007-2011
Type of Manuscript:  Special Section LETTER (Special Section on VLSI Technology toward Frontiers of New Market)
Category: 
Keyword: 
CMOS imagerlow voltagepulse width modulationADC
 Summary | Full Text:PDF(559.8KB)

Self-Pulsation of a Nd3+-Doped Fluoride Fiber Laser Using Tm3+-Doped Fiber as a Saturable Absorber
Kiyotaka SASAGAWA Kazushi KUSAWAKE Keiichiro KAGAWA Jun OHTA Masahiro NUNOSHITA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/05/01
Vol. E86-C  No. 5  pp. 719-724
Type of Manuscript:  Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: 
Keyword: 
passive Q-switched laserneodymium doped fluoride fiberthulium doped fluoride fibersaturable absorber
 Summary | Full Text:PDF(482.1KB)

Proposal and Preliminary Experiments of Indoor Optical Wireless LAN Based on a CMOS Image Sensor with a High-Speed Readout Function Enabling a Low-Power Compact Module with Large Uplink Capacity
Keiichiro KAGAWA Tomohiro NISHIMURA Takao HIRAI Yasushi YAMASAKI Hiroaki ASAZU Tomoaki KAWAKAMI Jun OHTA Masahiro NUNOSHITA Kunihiro WATANABE 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2003/05/01
Vol. E86-B  No. 5  pp. 1498-1507
Type of Manuscript:  Special Section PAPER (Joint Special Issue on Recent Progress in Optoelectronics and Communications)
Category: 
Keyword: 
indoor optical wireless LANCMOS image sensorfree-space optical communicationspace division multiple accessMEMS mirror
 Summary | Full Text:PDF(1MB)

Opto-Electronic Integrated Information System
Jun TANIDA Keiichiro KAGAWA Kenji YAMADA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/12/01
Vol. E84-C  No. 12  pp. 1778-1784
Type of Manuscript:  Special Section PAPER (Special Issue on Integrated Systems with New Concepts)
Category: 
Keyword: 
optical interconnectionoptical processingsmart pixeloptoelectronicsinformation system
 Summary | Full Text:PDF(1.9MB)

Design and Fabrication of Pipelined Digital Correlator for Opto-Electronic Discrete Correlation Processor
Kouichi NITTA Keiichiro KAGAWA Jun TANIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/03/01
Vol. E84-C  No. 3  pp. 312-317
Type of Manuscript:  Special Section PAPER (Special Issue on Optical Interconnects/Optical Signal Processing)
Category: Optical Signal Processing
Keyword: 
opto-electronic implementationdiscrete digital correlationsmart pixel
 Summary | Full Text:PDF(549.7KB)