Hiroyuki YASHIMA


Protograph-Based LDPC Coded System for Position Errors in Racetrack Memories
Ryo SHIBATA Gou HOSOYA Hiroyuki YASHIMA 
Publication:   
Publication Date: 2019/10/01
Vol. E102-A  No. 10  pp. 1340-1350
Type of Manuscript:  PAPER
Category: Coding Theory
Keyword: 
position errorinsertion/deletion channelLDPC codeprotographracetrack memory
 Summary | Full Text:PDF

Joint Iterative Decoding of Spatially Coupled Low-Density Parity-Check Codes for Position Errors in Racetrack Memories
Ryo SHIBATA Gou HOSOYA Hiroyuki YASHIMA 
Publication:   
Publication Date: 2018/12/01
Vol. E101-A  No. 12  pp. 2055-2063
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding theory and techniques
Keyword: 
insertion and deletion errorsspatially coupled low-density parity-check codeforward-backward algorithmiterative decoding
 Summary | Full Text:PDF

Spatially Coupled Low-Density Parity-Check Codes on Two-Dimensional Array Erasure Channel
Gou HOSOYA Hiroyuki YASHIMA 
Publication:   
Publication Date: 2018/12/01
Vol. E101-A  No. 12  pp. 2008-2017
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding theory and techniques
Keyword: 
spatially coupled LDPC codelow-density parity-check codestorage devicedensity evolution
 Summary | Full Text:PDF

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

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

Performance Analysis of MDSS Code Acquisition Using SLS for Optical CDMA Systems
Anh T. PHAM Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 2005/12/01
Vol. E88-B  No. 12  pp. 4570-4577
Type of Manuscript:  PAPER
Category: Fiber-Optic Transmission for Communications
Keyword: 
code acquisition and synchronizationsearch/lock strategyoptical code-division multiple-accessoptical orthogonal code
 Summary | Full Text:PDF

Overlapping PPM Fiber-Optic CDMA Systems with Imperfect Code Synchronization
Anh T. PHAM Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2581-2584
Type of Manuscript:  Special Section LETTER (Special Section on Information Theory and Its Applications)
Category: Spread Spectrum Thchnologies and Applications
Keyword: 
optical code-division multiple-accessoverlapping pulse-position modulationoptical orthogonal codecode synchronization
 Summary | Full Text:PDF

On the Code Synchronization of PPM/OPPM Fiber-Optic CDMA Systems
Anh T. PHAM Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 2004/10/01
Vol. E87-A  No. 10  pp. 2692-2701
Type of Manuscript:  Special Section PAPER (Special Section on Wide Band Systems)
Category: 
Keyword: 
fiber-optic CDMAPPMOPPMoptical orthogonal codescode acquisition and synchronizationserial-search algorithmmultiple-access interferenceshot-noise-limited receiver
 Summary | Full Text:PDF

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

Analysis of Optical PPM/CDMA System with M-Ary Convolutional Coding
Hemali PASQUAL Hiroyuki YASHIMA 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1999/10/25
Vol. E82-B  No. 10  pp. 1618-1625
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
optical CDMApulse-position modulationM-aryconvolutional codingdual-k code
 Summary | Full Text:PDF

Coherent Subcarrier Multiplexed System with Distributing Local Oscillator in Local Loop
Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1992/06/25
Vol. E75-B  No. 6  pp. 499-505
Type of Manuscript:  Special Section PAPER (Special Issue on Communication Theory)
Category: 
Keyword: 
subcarrier multiplexeddistributing local oscillator local loopcoherent SCM
 Summary | Full Text:PDF

Coherent Optical Polarization-Shift-Keying (POLSK) Homodyne System Using Phase-Diversity Receivers
Ichiro SETO Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1992/01/25
Vol. E75-C  No. 1  pp. 50-57
Type of Manuscript:  Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
Category: 
Keyword: 
coherent optical communicationsphase-diversity homodyne receiverspolarization-shift-keying (POLSK)
 Summary | Full Text:PDF

Parallel Rate-Variable Punctured Convolutional Coded PPM in Photon Communication
Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1992/01/25
Vol. E75-C  No. 1  pp. 44-49
Type of Manuscript:  Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
Category: 
Keyword: 
photon communicationpunctured covolutional coded PPM
 Summary | Full Text:PDF

A Fast Viterbi Decoding in Optical Channels
Hiroyuki YASHIMA Jouji SUZUKI Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1992/01/25
Vol. E75-B  No. 1  pp. 26-33
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
viterbi decodingoptical channel
 Summary | Full Text:PDF

Coherent Optical Polarization-Shift-Keying (POLSK) Homodyne System Using Phase-Diversity Receivers
Ichiro SETO Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/01/25
Vol. E75-A  No. 1  pp. 52-59
Type of Manuscript:  Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
Category: 
Keyword: 
coherent optical communicationsphase-diversity homodyne receiverspolarization-shift-keying (POLSK)
 Summary | Full Text:PDF

Parallel Rate-Variable Punctured Convolutional Coded PPM in Photon Communication
Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1992/01/25
Vol. E75-A  No. 1  pp. 46-51
Type of Manuscript:  Special Section PAPER (Joint Special Section on Fundamentals of Next Generation Opto-Technologies)
Category: 
Keyword: 
photon communicationpunctured covolutional coded PPM
 Summary | Full Text:PDF

Cutoff Rate and Capacity of MPPM in Noiseless Photon Counting Channel
Tomoaki OHTSUKI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS on Communications
Publication Date: 1991/12/25
Vol. E74-B  No. 12  pp. 4080-4084
Type of Manuscript:  PAPER
Category: Communication Systems and Transmission Equipment
Keyword: 
 Summary | Full Text:PDF

Capacity and Effects of Reed-Solomon Codes on Multi-Pulse PPM in Optical Communications
Masahiko TAKAHASHI Hiroyuki YASHIMA Iwao SASASE Shinsaku MORI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/11/25
Vol. E72-E  No. 11  pp. 1198-1203
Type of Manuscript:  PAPER
Category: Optical Communication
Keyword: 
 Summary | Full Text:PDF

Coded Nonuniform Phase/Frequency Modulation
Aminuddin CHALID Iwao SASASE Hiroyuki YASHIMA Shinsaku MORI 
Publication:   IEICE TRANSACTIONS (1976-1990)
Publication Date: 1989/08/25
Vol. E72-E  No. 8  pp. 903-911
Type of Manuscript:  PAPER
Category: Communication Theory
Keyword: 
 Summary | Full Text:PDF