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Research on Development of Ultrahigh-Density Storage System Using Multi-Leve Perpendicular Magnetic Recording

Research Project

Project/Area Number 15560330
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Communication/Network engineering
Research InstitutionEhime University

Principal Investigator

OSAWA Hisashi  Ehime University, Faculty of Engineering, Professor, 工学部, 教授 (50029336)

Co-Investigator(Kenkyū-buntansha) OKAMOTO Yoshihiro  Ehime University, Faculty of Engineering, Associate Professor, 工学部, 助教授 (20224082)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2003: ¥2,800,000 (Direct Cost: ¥2,800,000)
Keywordsperpendicular magnetic recording / three-level recording / micro track model / PRML-AR system / 擬似3値記録 / PRML方式
Research Abstract

The multi-level perpendicular recording system for the storage system which can attain a ultrahigh- density more than 600Gb/in^2 and its signal processing are studied. At first, a micro track model considering correlation lengths in the directions of cross-track and down-track is studied. Then, three-level perpendicular magnetic recording using two tracks is proposed and the bit error rate of PR1ML-AR system which is the PRML system employing PR1 (partial response class I) and Viterbi decoder with an AR (autoregressive) channel model is obtained by computer simulation using the micro track model, where the noise at the reading point is given by the sum of the transition noise obtained by the micro track model and the white Gaussian noise.
The readback waveform is shaped to a PR1 target waveform by the equalizer which consists of a low-pass filter with a cut-off frequency X_h normalized by a bit rate and a transversal filter with N_t taps. The Viterbi detector uses the correlation of the … More PR channel to recover the recorded sequence, where an AR channel model is used as a channel estimator in order to predict the current detector input noise from the noise sequence within the previous L bit interval. The bit error rate performance of three-level recording is compared with that of conventional two-level recording, where L=5,X_h=0.27 for three-level recording and X_h=0.4 for two-level recording. N_t is selected so as to minimize the bit error rate. It is assumed that the track width is 50nm for each track and the average cluster size is 6.5nm. The distribution of cluster size is also assumed to be a uniform one with a standard deviation of 0.3 times average cluster size.
The results show that at a bit error rate of 10^<-4> the areal recording densities for the two-level recording and three-level recording are 552 Gb/in^2 and 679 Gb/in^2, respectively. Therefore, the improvement of the tree-level recording in the areal density over the two-level recording is about 127 Gb/in^2, which is a large improvement and indicates that our three-level perpendicular recording will be a strong candidate for ultrahigh-density storage system. Less

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (26 results)

All 2005 2004 Other

All Journal Article (18 results) Publications (8 results)

  • [Journal Article] Influence of overwrite noise on performance of PRML channel in perpendicular magnetic recording2005

    • Author(s)
      H.Isozaki
    • Journal Title

      Journal of Magnetism and magnetic materials (in press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Performance of post-processor for PRML channel in perpendicular magnetic recording2005

    • Author(s)
      Y.Nakamura
    • Journal Title

      Journal of Magnetism and magnetic materials (in press)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] 垂直磁気記録のためのニューラルネットワーク等化器の簡単化2005

    • Author(s)
      大沢 寿
    • Journal Title

      電子情報通信学会論文誌C (印刷中)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] PRML方式を適用した長手及び垂直磁気記録の性能比較2005

    • Author(s)
      岡本好弘
    • Journal Title

      日本応用磁気学会誌 (印刷中)

    • NAID

      110002811813

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] PRML方式に対する消失誤り訂正方式の一検討2005

    • Author(s)
      岡本好弘
    • Journal Title

      日本応用磁気学会誌 29

      Pages: 101-104

    • NAID

      110002811866

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Influence of overwrite noise on performance of PRML channel in perpendicular magnetic recording2005

    • Author(s)
      H.Isozaki, Y.Okamoto, H.Osawa, H.Muraoka, Y.Nakamura
    • Journal Title

      Journal of Magn.Magn.Mat. (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Performance comparison of post-processor for PRML channel in perpendicular magnetic recording2005

    • Author(s)
      Y.Nakamura, Y.Okamoto, H.Osawa, H.Muraoka, Y.Nakamura
    • Journal Title

      Journal of Magn.Magn.Mat. (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Simplification of neural network equalizer for perpendicular magnetic recording2005

    • Author(s)
      H.Osawa, T.Shimizu, T.Nakaoka, Y.Okamoto, H.Saito, H.Muraoka, Y.Nakamura
    • Journal Title

      The Trans.of IEICE C-II J88-C, 4 (in press)

    • NAID

      10016599162

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Performance comparison of longitudinal and perpendicular magnetic Recordings using PRML systems2005

    • Author(s)
      Y.Okamoto, Y.Kondo, H.Osawa, Y.Nakamura, H.Muraoka, Y.Nakamura
    • Journal Title

      Journal of Magnetic Society of Japan (in press)

    • NAID

      110002811813

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] A study of erasure error correction for a PRML system2005

    • Author(s)
      Y.Okamoto, J.Ohtsubo, H.Osawa, Y.Nakamura, H.Muraoka, Y.Nakamura
    • Journal Title

      Journal of Magnetic Society of Japan 29, 2

      Pages: 101-104

    • NAID

      110002811866

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] A study of interactive processing between PRML detection and erasure error correction in perpendicular recording2004

    • Author(s)
      Y.Nakamura
    • Journal Title

      IEEE Transactions on Magnetics 40

      Pages: 3105-3107

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] NPML方式を用いたヘリカルスキャンアジマス記録のビット誤り率特性改善2004

    • Author(s)
      丸川昭二
    • Journal Title

      電子情報通信学会論文誌C J87-C

      Pages: 520-528

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] 高次元パリティ検査符号を用いたパーシャルレスポンス方式の検討2004

    • Author(s)
      斎藤秀俊
    • Journal Title

      電子情報通信学会論文誌C J87-C

      Pages: 469-479

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] 高密度垂直磁気記録システムにおける信号処理技術の動向2004

    • Author(s)
      岡本好弘
    • Journal Title

      日本応用磁気学会誌 28

      Pages: 490-500

    • NAID

      110002809750

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] A study of interactive processing between PRML detection and erasure error correction in perpendicular recording2004

    • Author(s)
      Y.Nakamura, Y.Okamoto, H.Osawa, H.Muraoka, Y.Nakamura
    • Journal Title

      IEEE Trans.on Magnetics 40, 4

      Pages: 3105-3107

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Bit error rate performance improvement of helical scanning azimuth recording using NPML systems2004

    • Author(s)
      S.Marukawa, T.Kawamoto, Y.Okamoto, H.Osawa
    • Journal Title

      The Trans.of IEICE C-II J87-C, 6

      Pages: 520-528

    • NAID

      110003202144

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Partial response system using high dimensional parity check codes2004

    • Author(s)
      H.Saito, T.Ogawa, Y.Okamoto, H.Osawa
    • Journal Title

      The Trans.of IEICE C-II J87-C, 5

      Pages: 469-479

    • NAID

      110003176651

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Trends in signal processing technologies for High-density perpendicular magnetic recording systems2004

    • Author(s)
      Y.Okamoto, H.Osawa
    • Journal Title

      Journal of Magnetic Society of Japan 28, 4

      Pages: 490-500

    • NAID

      110002809750

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] Yasuaki Nakamura: "A Study of Interactive Processing between PRML Detection and Erasure Error Correction in Perpendicular Recording"IEEE Transactions on Magnetics. 40. 4. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 丸川昭二: "NPML方式を用いたヘリカルスキャンアジマス記録のビット誤り率特性改善"電子情報通信学会論文誌C. J87-C・6. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 斎藤秀俊: "高次元パリティ検査符号を用いたパーシャルレスポンス方式の検討"電子情報通信学会論文誌C. J87-C・5. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 大沢 寿: "垂直磁気記録におけるGuided Scrambling符号化PRML方式の性能評価"映像情報メディア学会誌. 57・11. 1520-1525 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Yasuaki Nakamura: "A Study of Turbo Decoding with Embedded AR Channel Model for Perpendicular Recording"IEEE Transactions on Magnetics. 39・5. 2570-2572 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 大沢 寿: "高密度垂直磁気記録のための信号処理技術"電子情報通信学会誌. 86・10. 780-785 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 岡本好弘: "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C. J86-C・5. 542-550 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 大沢 寿: "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C. J86-C・5. 551-558 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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