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

垂直磁记录超高密度存储系统开发研究

• 批准号: 11450150
• 负责人: OSAWA Hisashi
• 金额: $ 9.54万
• 依托单位: EHIME UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-11450150/
• 关键词: Perpendicular Magnetic Recording; Positive Coefficient PRML System; MTR Code; Turbo Coding. Iterative Decoding; Simulation System; PRML方式; ターボ符号化; ニューラルネットワーク等化; 記録再生シミュレーションシステム

1. Development of PRML Systems for Perpendicular Magnetic RecordingPRML systems for perpendicular magnetic recording using a double layered medium are studied. Several higher order PRML systems characterized by the polynomials with the only positive coefficients, e.g.PR (1,2,3,2,1) ML system, which are suited for high density recording usig RLL codes such as 16/17 (0,6/6) code are developed. Then, DC-unbalanced PRML systems such as E^2PR3ML and E^3PR3ML systems which are effective for a perpendicular magnetic recording channel with jitter-like medium noise are developed. The 3/4MTR coded higher order PRML systems with positive coefficients such as E^2PR2ML, ME^2PR2ML and ME^3PR2ML which show the excellent performance at high recording densities are also developed.2. Development of High-Density R/W Simulation System for Perpendicular Magnetic RecordingA high-density read/write simulation system for perpendicular magnetic recording which consists of a spinstand, a personal computer, an arbitrary waveform gengerator and a digital storage oscilloscope is developed. These devices are conected each other through GPIB interfaces and are able to exchange data according to controll signals from a personal computer. The system can evaluate the several characteristics of heads and media, and evaluate the performance of signal processing methods.3. Performance Evaluation Using Simulation SystemUsing a high-density read/write simulation system for perpendicular magnetic recording, the performance of serially concatenated turbo coding systems using various RLL codes is evaluated. The results show that the system using a 64/65 (0,8) code and PR2 provides the best performance among RLL coded, serially conctenated turbo coding systems, which can achieve an high areal density of 57.3Gbit/inch^2.

1.研究了双层介质垂直磁记录的PRML系统。本文提出了几种适合于16/17（0，6/6）等RLL码高密度记录的高阶PRML系统，如PR（1，2，3，2，1）ML系统。然后，开发了对于具有抖动样介质噪声的垂直磁记录通道有效的DC不平衡PRML系统，例如E^2PR3ML和E^3PR3ML系统。提出了3/4 MTR编码的高阶正系数PRML系统，如E^2PR2ML、ME^2PR2ML和ME^3PR2ML，它们在高记录密度下表现出优异的性能.高密度垂直磁记录读写模拟系统的研制了一个由旋转支架、微机、任意波形发生器和数字存储示波器组成的高密度垂直磁记录读写模拟系统。这些设备通过GPIB接口相互连接，并能根据来自个人计算机的控制信号进行数据交换。该系统可以对磁头和介质的多种特性进行评估，并对信号处理方法的性能进行评估.使用仿真系统的性能评估使用垂直磁记录的高密度读/写仿真系统，使用各种RLL码的串行级联Turbo编码系统的性能进行评估。结果表明，采用64/65（0，8）码和PR 2的系统在RLL编码的串行集中Turbo编码系统中性能最好，可以实现57.3Gbit/inch^2的高面密度。

项目成果

Yoshihiro Okamoto: "BER Performance of Iterative Decoding in a Perpendicular Magnetic Recording Channel"IEEE Trans.Magnetics. 37. (2001)

Yoshihiro Okamoto：“垂直磁记录通道中迭代解码的 BER 性能”IEEE Trans.Magnetics。

Yoshihiro Okamoto: "A Study of Timing Recovery for Perpendicular Magnetic Recording"Journal of Magnetism and Magnetic Materials. (2001)

Yoshihiro Okamoto：“垂直磁记录定时恢复的研究”《磁性与磁性材料杂志》。

Yoshihiro Okamoto: "BER Performance of PRML Systems for Perpendicular Recording Using Single Layered Medium"IEEE Trans.on Magnetics. 36・5. (2000)

Yoshihiro Okamoto：“使用单层介质进行垂直记录的 PRML 系统的 BER 性能”IEEE Trans.on Magnetics（2000 年）。

H.Saito, T.Yokoyama, Y.Okamoto and H.Osawa: "Performance Evaluation of a Rate 9/10 MSN Coded PR4ML System Considering Partial Erasure"The Trans. of IEICE C-II. J82-C-II, 6. 337-345 (1999)

H.Saito、T.Yokoyama、Y.Okamoto 和 H.Osawa：“考虑部分擦除的 9/10 MSN 编码 PR4ML 系统的性能评估”The Trans。

H.Saito, Y.Okamoto and H.Osawa: "The Rate 19/20 Trellis Code Matched to Enhanced Extended Class -4 Partial Response Channel"IEEE Trans. on Magnetics. 37 (to be appeared). (2001)

H.Saito、Y.Okamoto 和 H.Osawa：“与增强型扩展类 -4 部分响应通道匹配的速率 19/20 网格码”IEEE Trans。