Yoshihiro OKAMOTO


Performance Evaluation of Non-binary LDPC Coding and Iterative Decoding System for BPM R/W Channel with Write-Errors
Yasuaki NAKAMURA Yoshihiro OKAMOTO Hisashi OSAWA Hajime AOI Hiroaki MURAOKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/12/01
Vol. E96-C  No. 12  pp. 1497-1503
Type of Manuscript:  Special Section PAPER (Special Section on Advanced Elementary Technologies for Information Storage)
Category: 
Keyword: 
bit-patterned mediumwrite-errornon-binary low-density parity-check (LDPC) codeiterative decoding
 Summary | Full Text:PDF

Performance Evaluation of Neuro-ITI Canceller Using a Modified Writing Process for TDMR
Masato YAMASHITA Yoshihiro OKAMOTO Yasuaki NAKAMURA Hisashi OSAWA Simon J. GREAVES Hiroaki MURAOKA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2013/12/01
Vol. E96-C  No. 12  pp. 1504-1507
Type of Manuscript:  BRIEF PAPER
Category: 
Keyword: 
writing processneuro-ITI cancellerTDMR
 Summary | Full Text:PDF

Performance Improvement System for Perpendicular Magnetic Recording with Thermal Asperity
Yupin SUPPAKHUN Pornchai SUPNITHI Yoshihiro OKAMOTO Yasuaki NAKAMURA Hisashi OSAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2011/09/01
Vol. E94-C  No. 9  pp. 1472-1478
Type of Manuscript:  PAPER
Category: Storage Technology
Keyword: 
perpendicular magnetic recordingthermal asperity estimateGMR nonlinearbaseline wandertrellismoving average
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Performance Evaluation of PRML System Based on Thermal Decay Model
Nobuhiko SHINOHARA Keiko TAKEUCHI Hisashi OSAWA Yoshihiro OKAMOTO Yasuaki NAKAMURA Atsushi NAKAMOTO Kenji MIURA Hiroaki MURAOKA Yoshihisa NAKAMURA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/08/01
Vol. E90-C  No. 8  pp. 1583-1588
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress of High-Density Information Storage)
Category: 
Keyword: 
thermal decayperpendicular magnetic recordingadaptive equalizationlong-term BER performance
 Summary | Full Text:PDF

An Application of Neural Network Equalization to Polytopic Multiplexing Holography and Reduction of Interpixel Interference
Hisashi OSAWA Naoki KAWAUE Yoshihiro OKAMOTO Yasuaki NAKAMURA Hirotaka OCHI Shoji MARUKAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2007/08/01
Vol. E90-C  No. 8  pp. 1612-1618
Type of Manuscript:  Special Section PAPER (Special Section on Recent Progress of High-Density Information Storage)
Category: 
Keyword: 
holographic data storageneural networkinterpixel interferenceBER performance
 Summary | Full Text:PDF

Characterization of Germanium Nanocrystallites Grown on SiO2 by a Conductive AFM Probe Technique
Katsunori MAKIHARA Yoshihiro OKAMOTO Hideki MURAKAMI Seiichiro HIGASHI Seiichi MIYAZAKI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2005/04/01
Vol. E88-C  No. 4  pp. 705-708
Type of Manuscript:  Special Section PAPER (Special Section on Fundamental and Application of Advanced Semiconductor Devices)
Category: Nanomaterials and Quantum-Effect Devices
Keyword: 
nanocrystalAFMconducting probelocal characterization
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Error Rate Performance of Turbo Coding for E2PR4 Channel
Hidetoshi SAITO Yoshihiro OKAMOTO Hisashi OSAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2001/11/01
Vol. E84-C  No. 11  pp. 1689-1696
Type of Manuscript:  PAPER
Category: Storage Technology
Keyword: 
digital magnetic recording systemTCPRturbo codeMAP decodingMTR code
 Summary | Full Text:PDF

Error Rate Performance of Turbo Coded Partial Response Systems for Digital Magnetic Recording Channels
Hidetoshi SAITO Masaichi TAKAI Yoshihiro OKAMOTO Hisashi OSAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/12/25
Vol. E82-C  No. 12  pp. 2218-2226
Type of Manuscript:  Special Section PAPER (Special Issue on Information Storage Technologies for the 21st Century)
Category: 
Keyword: 
digital magnetic recordingpartial responseturbo codingMAP decodingpartial erasure
 Summary | Full Text:PDF

Error Rate Performance of TCPR System Using Turbo Code for Digital Magnetic Recording Channel with Partial Erasure
Hidetoshi SAITO Masaichi TAKAI Yoshihiro OKAMOTO Hisashi OSAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1999/10/25
Vol. E82-A  No. 10  pp. 2074-2080
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Coding Theory
Keyword: 
digital magnetic recordingTCPR systemturbo codeiterative decodingpartial erasure
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Error Rate Performance of Trellis Coded PR4ML System for Digital Magnetic Recording Channel with Partial Erasure
Hidetoshi SAITO Masaichi TAKAI Yoshihiro OKAMOTO Hisashi OSAWA 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1998/10/25
Vol. E81-A  No. 10  pp. 2159-2165
Type of Manuscript:  Special Section PAPER (Special Section on Information Theory and Its Applications)
Category: Neural Networks/Signal Processing/Information Storage
Keyword: 
digital magnetic recordingPR systemtrellis codemaximum-likelihood decodingpartial erasure
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SNR Evaluation of Punctured Convolutional Coded PR4ML System in Digital Magnetic Recording with Partial Erasure Effect
Yoshihiro OKAMOTO Minoru SOUMA Shin TOMIMOTO Hidetoshi SAITO Hisashi OSAWA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1997/09/25
Vol. E80-C  No. 9  pp. 1154-1160
Type of Manuscript:  Special Section PAPER (Special Issue on High Density Information Recording Technologies)
Category: 
Keyword: 
digital magnetic recordingPRML systempunctured convolutional codepartial erasure
 Summary | Full Text:PDF

Performance Improvement of PRML System for (1, 7) RLL Code
Hisashi OSAWA Makoto OKADA Kohei WAKAMIYA Yoshihiro OKAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/10/25
Vol. E79-C  No. 10  pp. 1455-1461
Type of Manuscript:  PAPER
Category: Recording and Memory Technologies
Keyword: 
digital magnetic recordingPRML system(1,7) RLL codeViterbi detectionbit-error rate
 Summary | Full Text:PDF

Simplification of Viterbi Algorithm for (1, 7) RLL Code
Yoshitake KURIHARA Hisashi OSAWA Yoshihiro OKAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/11/25
Vol. E78-C  No. 11  pp. 1567-1574
Type of Manuscript:  Special Section PAPER (Special Issue on Ultra High Density Information Storage Technologies)
Category: 
Keyword: 
digital magnetic recording(1,7) RLL codepartial response systemViterbi detection
 Summary | Full Text:PDF

Coupling Characteristics between a Slab Waveguide and a Tapered Slab Waveguide with a Wedge-Shaped Nonlinear Cladding
Kazuo ONO Tamotsu SAKAI Hisashi OSAWA Yoshihiro OKAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1992/08/25
Vol. E75-C  No. 8  pp. 953-956
Type of Manuscript:  LETTER
Category: Opto-Electronics
Keyword: 
spatial solitoncouplingwedge-shaped nonlinear claddingoptical Kerr-like mediaoffset
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Coupling Characteristics of Butt-Joined Single-Mode Slab Waveguide and Tapered Slab Waveguide with Nonlinear Cladding
Kazuo ONO Tamotsu SAKAI Hisashi OSAWA Yoshihiro OKAMOTO 
Publication:   IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Publication Date: 1991/12/25
Vol. E74-A  No. 12  pp. 3949-3951
Type of Manuscript:  Special Section LETTER (Special Issue on the 1991 IEICE Fall Conference)
Category: Electromagnetic Theory
Keyword: 
 Summary | Full Text:PDF