Yasutaka IGARASHI


Some Saturation Characteristics of XOR Sum of Balance Functions
Yasutaka IGARASHI Toshinobu KANEKO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2012/01/01
Vol. E95-A  No. 1  pp. 2-7
Type of Manuscript:  Special Section PAPER (Special Section on Cryptography and Information Security)
Category: Symmetric Cryptography
Keyword: 
balance functionsaturation characteristicsHadamard transformExtended Hamming codeconvolutionblock cipherCLEFIA
 Summary | Full Text:PDF(480.3KB)

Improvement of Coherent Ultrashort Light Pulse CDMA Communication Systems with Distinct 4-Level m-Sequences
Yasutaka IGARASHI Ippei OKAJIMA Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2006/11/01
Vol. E89-A  No. 11  pp. 3018-3025
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
coherent ultrashort light pulse CDMAdistinct 4-level m-sequencesphase codeoptical fiber communication
 Summary | Full Text:PDF(299.1KB)

Performance Analysis of Coherent Ultrashort Light Pulse CDMA Communication Systems with Nonlinear Optical Thresholder
Yasutaka IGARASHI Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2006/04/01
Vol. E89-B  No. 4  pp. 1205-1213
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
coherent ultrashort light pulse code-division multiple-access (CDMA)nonlinear optical thresholderself-phase modulation (SPM)frequency chirpingfiber-optic high-speed communications
 Summary | Full Text:PDF(679.1KB)

Dispersion Compensation for Ultrashort Light Pulse CDMA Communication Systems
Yasutaka IGARASHI Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2002/12/01
Vol. E85-B  No. 12  pp. 2776-2784
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission
Keyword: 
ultrashort light pulse CDMAfiber dispersiondispersion-compensating fiberSMF-DCF linkpulse broadening
 Summary | Full Text:PDF(1.1MB)