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    Gated noise-predictive filter calibration
    2.
    发明授权
    Gated noise-predictive filter calibration 有权
    门控噪声预测滤波器校准

    公开(公告)号：US09202514B1

    公开(公告)日：2015-12-01

    申请号：US14334410

    申请日：2014-07-17

    Applicant: LSI Corporation

    Inventor： Jianzhong Huang ,  Shaohua Yang ,  Haitao Xia ,  Fuminori Sai ,  Weijun Tan

    IPC: G11B5/09 ,  G11B5/035 ,  G11B20/10

    CPC classification number: G11B20/10046

    Abstract: An apparatus for calibrating a noise predictive filter includes a noise-predictive filter operable to filter digital data samples to yield filtered data samples, a calibration circuit operable to calculate tap coefficients for the noise-predictive filter based at least in part on the digital data samples, and a gating circuit operable to select a portion of the digital data samples for use by the calibration circuit in calculating the tap coefficients.

    Abstract translation: 用于校准噪声预测滤波器的装置包括噪声预测滤波器，其可操作以对数字数据样本进行滤波以产生经滤波的数据采样;校准电路，可用于至少部分地基于数字数据样本来计算噪声预测滤波器的抽头系数 以及门控电路，其可操作以选择数字数据样本的一部分，以供校准电路在计算抽头系数时使用。

    Systems and methods for processing data with linear phase noise predictive filter
    4.
    发明授权
    Systems and methods for processing data with linear phase noise predictive filter 有权
    用线性相位噪声预测滤波器处理数据的系统和方法

    公开(公告)号：US08867154B1

    公开(公告)日：2014-10-21

    申请号：US13912171

    申请日：2013-06-06

    Applicant: LSI Corporation

    Inventor： Lu Lu ,  Jianzhong Huang ,  Haitao Xia

    IPC: G11B5/00 ,  H03M13/41 ,  G11B20/10 ,  H03M1/06

    CPC classification number: G11B20/10046 ,  H03H17/0267 ,  H03H2021/0087 ,  H03M13/2957 ,  H03M13/6343

    Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for data processing with a linear phase noise predictive filter. A data processing system includes an equalizer circuit operable to filter a digital data input to yield equalized data, a linear phase noise predictive finite impulse response filter operable to filter the equalized data to yield filtered data, and a data detector circuit operable to apply a data detection algorithm to the filtered data to yield a detected output. The greatest tap coefficient for the linear phase noise predictive finite impulse response filter is at a center tap.

    Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及用于使用线性相位噪声预测滤波器进行数据处理的系统和方法。 数据处理系统包括均衡器电路，可操作以对数字数据输入进行滤波以产生均衡的数据;线性相位噪声预测有限脉冲响应滤波器，可操作以对均衡的数据进行滤波以产生滤波后的数据;以及数据检测器电路，可操作以应用数据 检测算法对滤波后的数据产生检测输出。 线性相位噪声预测有限脉冲响应滤波器的最大抽头系数位于中心抽头。

    Systems and Methods for Preventing Adjacent Track Erasure
    5.
    发明申请
    Systems and Methods for Preventing Adjacent Track Erasure 有权
    防止相邻轨迹擦除的系统和方法

    公开(公告)号：US20140307345A1

    公开(公告)日：2014-10-16

    申请号：US13886170

    申请日：2013-05-02

    Applicant: LSI CORPORATION

    Inventor： Lu Lu ,  Haitao Xia ,  Jianzhong Huang

    IPC: G11B20/18

    CPC classification number: G11B20/18 ,  G11B20/10388

    Abstract: A data processing circuit includes a subtraction circuit operable to subtract an ideal version of a data pattern from a sampled version of a data pattern to yield a difference signal, an error calculation circuit operable to calculate an error between the ideal version of the data pattern and the sampled version of the data pattern based on the difference signal, and a comparator circuit operable to compare the error with a threshold value and operable to assert a track refresh signal if the error is greater than the threshold value. The track refresh signal is operable to trigger a magnetic storage device to refresh data on a data track.

    Abstract translation: 数据处理电路包括减法电路，其可操作以从数据模式的采样版本中减去数据模式的理想版本以产生差分信号;误差计算电路，用于计算数据模式的理想版本与 基于差分信号的数据模式的采样版本;以及比较器电路，其可操作以将误差与阈值进行比较，并且如果误差大于阈值则可用于断言轨迹刷新信号。 轨道刷新信号可操作以触发磁存储设备来刷新数据轨道上的数据。

    Constant false alarm resonance detector
    8.
    发明授权
    Constant false alarm resonance detector 有权
    常误差共振检测器

    公开(公告)号：US08937781B1

    公开(公告)日：2015-01-20

    申请号：US14109705

    申请日：2013-12-17

    Applicant: LSI Corporation

    Inventor： Xiufeng Song ,  Jianzhong Huang ,  Fan Zhang ,  Jun Xiao

    IPC: G11B5/60

    CPC classification number: G11B5/6076

    Abstract: A contact detection system includes a comparator operable to compare a signal derived from a contact sensor with a threshold and to indicate contact when the signal is greater than the threshold, a parameter estimation circuit operable to estimate parameters of a probability density function based on the signal derived from the contact sensor, and a threshold calculator operable to calculate the threshold based at least in part on the parameters of the probability density function.

    Abstract translation: 接触检测系统包括比较器，可操作以将从接触传感器导出的信号与阈值进行比较，并且当信号大于阈值时指示接触;参数估计电路，用于基于信号估计概率密度函数的参数 以及阈值计算器，其可操作以至少部分地基于所述概率密度函数的参数来计算所述阈值。

    Soft decision assisted equalizer adaptation
    10.
    发明授权
    Soft decision assisted equalizer adaptation 有权
    软决策辅助均衡器适应

    公开(公告)号：US09288084B1

    公开(公告)日：2016-03-15

    申请号：US14259338

    申请日：2014-04-23

    Applicant: LSI Corporation

    Inventor： Lu Lu ,  Haitao Xia ,  Haotian Zhang ,  Jianzhong Huang

    IPC: G11B5/035 ,  G11B20/10 ,  H04L25/03 ,  H04L27/01 ,  G11B5/09

    CPC classification number: H04L25/03006 ,  G11B20/10009 ,  G11B20/10046 ,  H04L25/03019 ,  H04L25/067 ,  H04L27/01 ,  H04L2025/03592

    Abstract: A data processing system includes an equalizer circuit operable to equalize digital data according to tap coefficients to yield equalized data, a tap coefficient adaptation circuit operable to adapt the tap coefficients based at least in part on a scaled error signal, a data detector operable to apply a data detection algorithm to the digital data to generate hard decisions and soft decisions, an error calculation circuit operable to calculate an error signal based on the equalized data and on the hard decisions, and a scaling circuit operable to scale the error signal based on the soft decisions to yield the scaled error signal.

    Abstract translation: 数据处理系统包括均衡器电路，其可操作以根据抽头系数对数字数据进行均衡以产生均衡的数据;抽头系数适配电路，用于至少部分地基于缩放的误差信号来调整抽头系数;数据检测器，可操作以应用 用于产生硬判决和软决策的数据检测算法，用于基于均衡数据和硬判决来计算误差信号的误差计算电路，以及可用于根据所述硬判决来缩放误差信号的缩放电路 产生缩放误差信号的软判决。

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