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    Data storage systems
    4.
    发明申请
    Data storage systems 有权
    数据存储系统

    公开(公告)号：US20050138518A1

    公开(公告)日：2005-06-23

    申请号：US10739966

    申请日：2003-12-18

    申请人： Roy Cideciyan ,  Ajay Dholakia ,  Evangelos Eleftheriou ,  Richard Galbraith ,  Weldon Hanson ,  Thomas Mittelholzer ,  Travis Oenning

    发明人： Roy Cideciyan ,  Ajay Dholakia ,  Evangelos Eleftheriou ,  Richard Galbraith ,  Weldon Hanson ,  Thomas Mittelholzer ,  Travis Oenning

    IPC分类号： G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  H03M13/00

    CPC分类号： G11B20/1833

    摘要： A data storage system includes an encoder subsystem comprising an error correction code encoder, a modulation encoder, and a precoder, and a decoder subsystem similarly comprising a detector, an inverse precoder, a channel decoder, and an error correction code decoder. The error correction encoder applies an error correction code to the incoming user bit stream, and the modulation encoder applies so-called modulation or constrained coding to the error correction coded bit stream. The precoder applies so-called precoding to the modulation encoded bit stream. However, this precoding is applied to selected portions of the bit stream only. There can also be a permutation step where the bit sequence is permuted after the modulation encoder before precoding is applied by the precoder. The decoder subsystem operates in the inverse manner.

    摘要翻译： 数据存储系统包括编码器子系统，包括纠错码编码器，调制编码器和预编码器，以及类似地包括检测器，逆预编码器，信道解码器和纠错码解码器的解码器子系统。 误差校正编码器对输入用户比特流应用纠错码，并且调制编码器将所谓的调制或约束编码应用于纠错编码比特流。 预编码器将所谓的预编码应用于调制编码比特流。 然而，该预编码仅应用于位流的选定部分。 还可以存在一个置换步骤，其中在由预编码器施加预编码之前，该位序列在调制编码器之后被置换。 解码器子系统以相反的方式运行。

    Optimizing detector target polynomials in read/write channels to achieve best error rate performance in disk drives
    8.
    发明申请
    Optimizing detector target polynomials in read/write channels to achieve best error rate performance in disk drives 有权
    在读/写通道中优化检测器目标多项式，以实现磁盘驱动器中最佳的错误率性能

    公开(公告)号：US20060235919A1

    公开(公告)日：2006-10-19

    申请号：US11110187

    申请日：2005-04-19

    申请人： Yuan Xing Lee ,  Richard Galbraith ,  Travis Oenning ,  Weldon Hanson

    发明人： Yuan Xing Lee ,  Richard Galbraith ,  Travis Oenning ,  Weldon Hanson

    IPC分类号： G06F17/15

    CPC分类号： G11B20/24 ,  G11B20/10009 ,  G11B20/10046

    摘要： Embodiments of the invention provide techniques for optimizing the detector target polynomials in read/write channels to achieve the best error rate performance in recording devices. In one embodiment, a method of obtaining a detector target polynomial of a read/write channel to achieve best error rate performance in a recording device comprises: providing an initial detector target for the read/write channel; measuring a noise autocorrelation of the read/write channel at the output of equalizer using channel hardware; computing a noise autocorrelation at the output of the 1st stage target based on the measured noise autocorrelation of the read/write channel at the output of equalizer; calculating optimal coefficients for the noise whitening filter; and obtaining the optimal detector target polynomial of the read/write channel using the calculated coefficients for noise whitening filter.

    摘要翻译： 本发明的实施例提供了用于优化读/写通道中的检测器目标多项式以在记录装置中实现最佳误码率性能的技术。 在一个实施例中，获得读/写通道的检测器目标多项式以在记录装置中实现最佳误码率性能的方法包括：为读/写通道提供初始检测器目标; 使用信道硬件测量均衡器输出处的读/写通道的噪声自相关; 基于在均衡器的输出处的读/写通道的测量的噪声自相关来计算第1阶段目标的输出处的噪声自相关; 计算噪声增白滤波器的最优系数; 并使用所计算的噪声增白滤波器的系数来获得读/写信道的最佳检测器目标多项式。