Ryo TAKAHASHI

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 integration,  photonic integrated circuits,  tunable laser,  wavelength conversion,  all-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: 
capacitance,  power distribution network,  state-dependency,  integrated circuit modeling,  electromagnetic interference, 
  Summary |  Full Text:PDF (1009.1KB)
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),  chaos,  code division multiple access (CDMA),  spreading sequence,  band-limited signals, 
  Summary |  Full Text:PDF (233.1KB)
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: 
chaos,  complex code division multiple access,  spreading sequence, 
  Summary |  Full Text:PDF (92.1KB)
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: Special Section PAPER (Special Section on Optical Signal-Processing Devices for Photonic Networks)
Category: INVITED
Keyword: 
optical packet switching,  optical packet processing,  serial-to-parallel converter,  parallel-to-serial converter,  optical clock-pulse generator,  multi-protocol label switching,  MPLS, 
  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 generation,  parallel-to-serial conversion,  packet-switched network,  metal-semiconductor-metal photodetector, 
  Summary |  Full Text:PDF (741.4KB)