Yoshihiro OKAMOTO


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
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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
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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
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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: 1999/12/20
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 (1.1MB)

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: 1999/10/20
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
  Summary |  Full Text:PDF (1.2MB)

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: 1998/10/20
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
  Summary |  Full Text:PDF (599.5KB)

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: 1997/09/20
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
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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: 1996/10/20
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 (503.5KB)

Simplification of Viterbi Algorithm for (1, 7) RLL Code
Yoshitake KURIHARA  Hisashi OSAWA  Yoshihiro OKAMOTO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/11/20
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 (573.8KB)

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: 1992/08/20
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: 1991/12/20
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 (181KB)