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PRML Systems Coping with Jitter-Like Medium Noise in Perpendicular Magnetic Recording

Research Project

Project/Area Number 13650412
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 情報通信工学
Research InstitutionEHIME UNIVERSITY

Principal Investigator

OKAMOTO Yoshihiro  Ehime University, Engineering (Dept.Electrical and Electronic Eng.,) Associate Professor, 工学部, 助教授 (20224082)

Co-Investigator(Kenkyū-buntansha) OSAWA Hisashi  Ehime University, Engineering (Dept.Electrical and Electronic Eng.,) Professor, 工学部, 教授 (50029336)
斎藤 秀俊  愛媛大学, 工学部, 助手 (60274338)
Project Period (FY) 2001 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2002: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 2001: ¥2,800,000 (Direct Cost: ¥2,800,000)
KeywordsPRML Systems / Perpendicular Magnetic Recording / Jitter-Like Medium Noise / AR Channel Model / Parity Code / Postprocessor / HDD / ディジタル磁気記録 / ARモデル / 雑音予測
Research Abstract

Performance improvement of PRML sstem to achieve high recording density of information storage systems is studied. Effective PRML systems for jitter-like medium noise in perpendicular magnetic recording were performed by computer simulation and R/W experiments and following results were obtained.
(1) AR (Autoregressive) channel modeling of PR channel
It is clarified that PR channels in perpendicular magnetic recording with jitter-like medium noise can be modeled by AR channel model well.
(2) Application of AR chanel model to Viterbi detector
Performance improvement of PRML system is achieved by applying AR channel model to Viterbi detector. Furthermore, it is clarified that performance of turbo decoding system is also improved by application of AR chanel model to APP decoder.
(3) Error pattern analysis of PRML systems in perpendicular magnetic recording
Error patterns of PRML system and PRML-AR system were studied in perpendicular magnetic recording. It is clarified that error patterns change with proportion of jitter-like noise.
(4) Performance improvement by combination of PRML-AR system and postprocessor Most of decoding errors in PRML-AR system can be corrected by postprocessor. It is clarified that the big performance improvement is obtained by the combination.

Report

(3 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • Research Products

    (13 results)

All Other

All Publications (13 results)

  • [Publications] 岡本, 増成, 山本, 大沢, 斎藤, 村岡, 中村: "垂直磁気記録におけるARチャネルモデルを用いたPRML方式の性能改善"電子情報通信学会論文誌. J85-C・5. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 大沢, 篠原, 岡本, 斎藤, 村岡, 中村: "垂直磁気記録におけるNPML方式の性能評価"電子情報通信学会論文誌. J85-C・5. (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Okamoto, N.Masunari, H.Yamamoto, H.Osawa, H.Saito, H.Muraoka, Y.Nakamura: "Jitter-like noise cancellation using AR model of PR channel in perpendicular magnetic recording"IEEE Transactions on Magnetics. 38・5. 2349-2351 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 岡本, 金岡, 大沢, 斎藤, 村岡, 中村: "垂直磁気記録における縦続接続ターボ符号の性能評価"映像情報メディア学会誌. 55・10. 1353-1358 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Okamoto, N.Masunari, H.Yamamoto, H.Osawa, H.Saito, H.Muraoka and Y.Nakamura: "Performance improvement of PRML system using AR channel model in perpendicular magnetic recording"The Trans.of IEICE C. vol.J85-C, no.5 (to be appeared). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] H.Osawa, Y.Okamoto, H.Saito, H.Muraoka and Y.Nakamura: "Performance evaluation of NPML system in perpendicular magnetic recording"The Trans.of IEICE C. vol.J85-C, no.5 (to be appeared). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Okamoto, N.Masunari, H.Yamamoto, H.Osawa, H.Saito, H.Muraoka and Y.Nakamura: "Jitter-like noise cancellation using AR model of PR channel in perpendicular magnetic recording"IEEE Trans.on Magn.. vol.38, no.5. 2349-2351 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Okamoto, T.Kanaoka, H.Osawa and H.Saito, H.Muraoka. And Y.Nakamura: "Performance evaluation of serially concatenated turbo coding systems in perpendicular magnetic recording"The journal of the institute of image information and television engineers. vol.55, no.10. 1353-1358 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Y.Okamoto, et al.: "Jitter-like Noise Cancellation Using AR Model of PR Channel in Perpendicular Magnetic Recording"IEEE Transactions on Magnetics. Vol.38 No.5. 2349-2351 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 岡本好弘, 増成訓之, 山本裕文, 大沢寿, 斎藤秀俊, 村岡裕明, 中村慶久: "垂直磁気記録におけるARチャネルモデルを用いたPRML方式の性能改善"電子情報通信学会 論文集C. (採録決定済). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Okamoto, et al.: "A Study on Post-processing for PRML-AR System in Perpendicular Magnetic Recording"Digests of International Magnetics Conference 2003. (発売予定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Nakamura, et al.: "A Study of Turbo coding and decoding using AR Channel Model"Digests of International Magnetics Conference 2003. (発売予定). (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 大沢寿, 篠原宜彦, 岡本好弘, 斎藤秀俊, 村岡裕明, 中村慶久: "垂直磁気記録におけるNPML方式の性能評価"電子情報通信学会 論文集C. (採録決定済). (2003)

    • Related Report
      2002 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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