Ryo TAKAHASHI


Up-Stream Dispatching of Power by Density of Power Packet
Shinya NAWATA Ryo TAKAHASHI Takashi HIKIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2016/12/01
Vol. E99-A  No. 12  pp. 2581-2584
Type of Manuscript:  LETTER
Category: Systems and Control
Keyword: 
power packetup-stream dispatchingrouterpower density
 Summary | Full Text:PDF(2.3MB)

Active and Reactive Power in Stochastic Resonance for Energy Harvesting
Madoka KUBOTA Ryo TAKAHASHI Takashi HIKIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/07/01
Vol. E98-A  No. 7  pp. 1537-1539
Type of Manuscript:  LETTER
Category: Noise and Vibration
Keyword: 
stochastic resonancewhite Gaussian noiseenergy harvestingactive and reactive powerFokker-Plank equation
 Summary | Full Text:PDF(272KB)

Realization of Autonomous Clock Synchronization for Power Packet Dispatching
Yanzi ZHOU Ryo TAKAHASHI Takashi HIKIHARA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2015/02/01
Vol. E98-A  No. 2  pp. 749-753
Type of Manuscript:  LETTER
Category: Systems and Control
Keyword: 
system modelingCPPLLclock synchronizationpower packet
 Summary | Full Text:PDF(747.3KB)

Wavelength-Routed Switching for 25-Gbit/s Optical Packets Using a Compact Transmitter Integrating a Parallel-Ring-Resonator Tunable Laser and an InGaAlAs EAM
Toru SEGAWA Wataru KOBAYASHI Tatsushi NAKAHARA Ryo TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/07/01
Vol. E97-C  No. 7  pp. 719-724
Type of Manuscript:  INVITED PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
tunable laserelectro-absorption modulatoroptical packet switchingphotonic integrated circuits
 Summary | Full Text:PDF(3.3MB)

Performance Evaluation of CDMA Using Chaotic Spreading Sequence with Constant Power in Indoor Power Line Fading Channels
Ryo TAKAHASHI Ken UMENO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2014/07/01
Vol. E97-A  No. 7  pp. 1619-1622
Type of Manuscript:  LETTER
Category: Nonlinear Problems
Keyword: 
chaosCDMAfadingpower line channel
 Summary | Full Text:PDF(1.1MB)

A Novel Optoelectronic Serial-to-Parallel Converter for 25-Gbps 32-bit Optical Label Processing
Salah IBRAHIM Hiroshi ISHIKAWA Tatsushi NAKAHARA Yasumasa SUZAKI Ryo TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/07/01
Vol. E97-C  No. 7  pp. 773-780
Type of Manuscript:  Special Section PAPER (Special Section on Opto-electronics and Communications for Future Optical Network)
Category: 
Keyword: 
optical packet switchingoptical packet processingserial-to-parallel converteroptoelectronic integrated circuit
 Summary | Full Text:PDF(4.3MB)

State-Dependence of On-Chip Power Distribution Network Capacitance
Koh YAMANAGA Shiho HAGIWARA Ryo TAKAHASHI Kazuya MASU Takashi SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2014/01/01
Vol. E97-C  No. 1  pp. 77-84
Type of Manuscript:  PAPER
Category: Integrated Electronics
Keyword: 
CMOS logic circuitstate-dependent capacitance modelcapacitance measurementPDN-capacitanceparasitic capacitance
 Summary | Full Text:PDF(2.2MB)

Monolithically Integrated Wavelength-Routing Switch Using Tunable Wavelength Converters with Double-Ring-Resonator Tunable Lasers
Toru SEGAWA Shinji MATSUO Takaaki KAKITSUKA Yasuo SHIBATA Tomonari SATO Yoshihiro KAWAGUCHI Yasuhiro KONDO Ryo TAKAHASHI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/09/01
Vol. E94-C  No. 9  pp. 1439-1446
Type of Manuscript:  PAPER
Category: Optoelectronics
Keyword: 
monolithic integrationphotonic integrated circuitstunable laserwavelength conversionall-optical switch
 Summary | Full Text:PDF(3.4MB)

Linear Time Calculation of On-Chip Power Distribution Network Capacitance Considering State-Dependence
Shiho HAGIWARA Koh YAMANAGA Ryo TAKAHASHI Kazuya MASU Takashi SATO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/12/01
Vol. E93-A  No. 12  pp. 2409-2416
Type of Manuscript:  Special Section PAPER (Special Section on VLSI Design and CAD Algorithms)
Category: Device and Circuit Modeling and Analysis
Keyword: 
capacitancepower distribution networkstate-dependencyintegrated circuit modelingelectromagnetic interference
 Summary | Full Text:PDF(1010.4KB)

Performance Evaluation of Band-Limited Baseband Synchronous CDMA Using Orthogonal ICA Sequences
Ryo TAKAHASHI Ken UMENO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2010/03/01
Vol. E93-A  No. 3  pp. 577-582
Type of Manuscript:  PAPER
Category: Nonlinear Problems
Keyword: 
independent component analysis (ICA)chaoscode division multiple access (CDMA)spreading sequenceband-limited signals
 Summary | Full Text:PDF(233.9KB)

Performance Analysis of Complex CDMA Using Complex Chaotic Spreading Sequence with Constant Power
Ryo TAKAHASHI Ken UMENO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2009/12/01
Vol. E92-A  No. 12  pp. 3394-3397
Type of Manuscript:  LETTER
Category: Nonlinear Problems
Keyword: 
chaoscomplex code division multiple accessspreading sequence
 Summary | Full Text:PDF(92.8KB)

High-Speed Optical Packet Processing Technologies for Optical Packet-Switched Networks
Hirokazu TAKENOUCHI Tatsushi NAKAHARA Kiyoto TAKAHATA Ryo TAKAHASHI Hiroyuki SUZUKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/03/01
Vol. E88-C  No. 3  pp. 286-294
Type of Manuscript:  INVITED PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: 
Keyword: 
optical packet switchingoptical packet processingserial-to-parallel converterparallel-to-serial converteroptical clock-pulse generatormulti-protocol label switchingMPLS
 Summary | Full Text:PDF(1.6MB)

40-Gbit/s 16-bit Burst Optical Packet Generator Based on Photonic Parallel-to-Serial Conversion
Hirokazu TAKENOUCHI Kiyoto TAKAHATA Tatsushi NAKAHARA Ryo TAKAHASHI Hiroyuki SUZUKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2004/05/01
Vol. E87-C  No. 5  pp. 825-827
Type of Manuscript:  LETTER
Category: Optoelectronics
Keyword: 
optical packet generationparallel-to-serial conversionpacket-switched networkmetal-semiconductor-metal photodetector
 Summary | Full Text:PDF(742.6KB)