公开(公告)号：US09129647B2

公开(公告)日：2015-09-08

申请号：US14136051

申请日：2013-12-20

Applicant: LSI Corporation

Inventor： Yu Liao ,  Xun Zhang ,  Haitao Xia

IPC: G11B5/02 ,  G11B20/10 ,  G11B5/55 ,  G11B5/035

CPC classification number: G11B20/10046 ,  G11B5/035 ,  G11B5/5526

Abstract: A servo system includes an equalizer circuit operable to filter digital servo data samples according to filter tap coefficients to yield equalized data, a detector circuit operable to apply a data detection algorithm to the equalized data to yield hard decisions, a convolution circuit operable to yield ideal digital data based on the hard decisions and on target values, a subtraction circuit operable to subtract the ideal digital data from the equalized data to yield an adaptation error signal, an error gradient calculator operable calculate an error gradient signal based at least in part on the adaptation error signal, and a tap adaptation circuit operable to calculate values of the filter tap coefficients based on the error gradient signal.

Abstract translation: 伺服系统包括均衡器电路，其可操作以根据滤波器抽头系数对数字伺服数据样本进行滤波以产生均衡的数据;检测器电路，可操作以将数据检测算法应用于均衡数据以产生硬判决;卷积电路， 基于硬判决和目标值的数字数据，减法电路，用于从均衡数据中减去理想数字数据以产生自适应误差信号，误差梯度计算器可操作地至少部分地基于 适应误差信号，以及可用于基于误差梯度信号计算滤波器抽头系数的值的抽头自适应电路。

公开(公告)号：US08970981B2

公开(公告)日：2015-03-03

申请号：US13851734

申请日：2013-03-27

Applicant: LSI Corporation

Inventor： Xun Zhang ,  Haitao Xia ,  Dahua Qin

IPC: G11B5/584 ,  G11B5/596 ,  G11B27/30

CPC classification number: G11B5/59688 ,  G11B5/59627 ,  G11B20/1217 ,  G11B27/3027 ,  G11B2020/1281 ,  G11B2020/1484

Abstract: A hard disk drive uses a second, reference burst field in a preamble to estimate burst phase and burst magnitude. Such estimations are used for position error signal integration and repeatable runout correction. Gain error is also derived from such estimations. Information contained in a preamble field is used in conjunction with the reference burst phase estimation to synchronize servo address marks.

Abstract translation: 硬盘驱动器使用前导码中的第二个参考突发字段来估计突发相位和突发幅度。 这种估计用于位置误差信号积分和可重复的跳动校正。 增益误差也来源于这样的估计。 包含在前导字段中的信息与参考突发相位估计结合使用以同步伺服地址标记。

公开(公告)号：US20150179213A1

公开(公告)日：2015-06-25

申请号：US14136051

申请日：2013-12-20

Applicant: LSI Corporation

Inventor： Yu Liao ,  Xun Zhang ,  Haitao Xia

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B5/035 ,  G11B5/5526

Abstract: A servo system includes an equalizer circuit operable to filter digital servo data samples according to filter tap coefficients to yield equalized data, a detector circuit operable to apply a data detection algorithm to the equalized data to yield hard decisions, a convolution circuit operable to yield ideal digital data based on the hard decisions and on target values, a subtraction circuit operable to subtract the ideal digital data from the equalized data to yield an adaptation error signal, an error gradient calculator operable calculate an error gradient signal based at least in part on the adaptation error signal, and a tap adaptation circuit operable to calculate values of the filter tap coefficients based on the error gradient signal.

Abstract translation: 伺服系统包括均衡器电路，其可操作以根据滤波器抽头系数对数字伺服数据样本进行滤波以产生均衡的数据;检测器电路，可操作以将数据检测算法应用于均衡数据以产生硬判决;卷积电路， 基于硬判决和目标值的数字数据，减法电路，用于从均衡数据中减去理想数字数据以产生自适应误差信号，误差梯度计算器可操作地至少部分地基于 适应误差信号，以及可用于基于误差梯度信号计算滤波器抽头系数的值的抽头自适应电路。

公开(公告)号：US20140331108A1

公开(公告)日：2014-11-06

申请号：US13912109

申请日：2013-06-06

Applicant: LSI Corporation

Inventor： Dahua Qin ,  Xun Zhang ,  Haitao Xia

IPC: G06F11/07

CPC classification number: G06F11/0727 ,  G11B5/09 ,  G11B20/10305 ,  G11B20/10361 ,  G11B20/10379 ,  G11B20/1816 ,  H03M13/03 ,  H03M13/4107

Abstract: An apparatus for detecting media flaws includes a branch metric selection circuit operable to select a first branch metric and a second branch metric, a subtraction circuit operable to subtract the second branch metric from the first branch metric to yield a difference, and a comparator operable to compare the difference with a threshold value and to indicate a presence of a potential flaw in a storage medium when the difference is less than the threshold value.

Abstract translation: 用于检测媒体缺陷的装置包括可操作以选择第一分支度量和第二分支度量的分支度量选择电路，减法电路，用于从第一分支度量中减去第二分支度量以产生差值;以及比较器， 将差值与阈值进行比较，并且当差值小于阈值时指示存储介质中存在潜在缺陷。

公开(公告)号：US20140146413A1

公开(公告)日：2014-05-29

申请号：US13685990

申请日：2012-11-27

Applicant: LSI CORPORATION

Inventor： Haitao Xia ,  Xun Zhang ,  Dahua Qin ,  Jiangzhong Huang

IPC: G11B20/12 ,  H04B1/16

CPC classification number: H04B1/16 ,  G11B20/10268 ,  G11B20/10296 ,  G11B2020/1484

Abstract: Systems and method relating generally to detecting information, and more particularly without limitation to systems and methods for synchronizing to a data stream.

Abstract translation: 一般涉及检测信息的系统和方法，更具体而言，不限于与数据流同步的系统和方法。

公开(公告)号：US08958166B2

公开(公告)日：2015-02-17

申请号：US13895809

申请日：2013-05-16

Applicant: LSI Corporation

Inventor： Xun Zhang ,  Mark D. Thornley ,  Dahua Qin ,  Haitao Xia

IPC: G11B20/10 ,  G11B5/09 ,  G11B21/02 ,  G11B20/16 ,  G11B5/012

CPC classification number: G11B20/16 ,  G11B5/012 ,  G11B5/59688

Abstract: Sliding-window based data processing includes receiving an analog signal, converting the analog signal to a series of digital samples synchronous to a sampling clock, performing a first discrete Fourier transform on a first portion of the series of digital samples, performing a second discrete Fourier transform on a second portion of the series of digital samples, performing a third discrete Fourier transform on a third portion of the series of digital samples, generating a first series of zero phase start values by calculating a zero phase start value based on the first discrete Fourier transform in a sliding-window at a series of time increments across the servo preamble, storing the zero phase start values, and averaging the stored zero phase start values at the end of the servo preamble.

Abstract translation: 基于滑动窗口的数据处理包括接收模拟信号，将模拟信号转换为与采样时钟同步的一系列数字采样，在该系列数字样本的第一部分上执行第一离散付里叶变换，执行第二离散付里叶 在所述一系列数字样本的第二部分上进行变换，在所述一系列数字采样的第三部分上执行第三离散付里叶变换，通过基于所述第一离散值计算零相位起始值来产生第一系列的零相位起始值 在伺服前导码中以一系列时间增量在滑动窗口中进行傅里叶变换，存储零相位起始值，并且在伺服前导码结束时平均存储的零相位起始值。

公开(公告)号：US20140340780A1

公开(公告)日：2014-11-20

申请号：US13895809

申请日：2013-05-16

Applicant: LSI Corporation

Inventor： Xun Zhang ,  Mark D. Thornley ,  Dahua Qin ,  Haitao Xia

IPC: G11B20/16 ,  G11B5/012

CPC classification number: G11B20/16 ,  G11B5/012 ,  G11B5/59688

Abstract: Sliding-window based data processing includes receiving an analog signal, converting the analog signal to a series of digital samples synchronous to a sampling clock, performing a first discrete Fourier transform on a first portion of the series of digital samples, performing a second discrete Fourier transform on a second portion of the series of digital samples, performing a third discrete Fourier transform on a third portion of the series of digital samples, generating a first series of zero phase start values by calculating a zero phase start value based on the first discrete Fourier transform in a sliding-window at a series of time increments across the servo preamble, storing the zero phase start values, and averaging the stored zero phase start values at the end of the servo preamble.

Abstract translation: 基于滑动窗口的数据处理包括接收模拟信号，将模拟信号转换为与采样时钟同步的一系列数字采样，在该系列数字样本的第一部分上执行第一离散付里叶变换，执行第二离散付里叶 在所述一系列数字样本的第二部分上进行变换，在所述一系列数字采样的第三部分上执行第三离散付里叶变换，通过基于所述第一离散值计算零相位起始值来产生第一系列的零相位起始值 在伺服前导码中以一系列时间增量在滑动窗口中进行傅里叶变换，存储零相位起始值，并且在伺服前导码结束时平均存储的零相位起始值。

公开(公告)号：US08861107B2

公开(公告)日：2014-10-14

申请号：US13886049

申请日：2013-05-02

Applicant: LSI Corporation

Inventor： Xun Zhang ,  Haitao Xia ,  Dahua Qin

IPC: G11B5/02 ,  G11B5/09 ,  G11B20/18

CPC classification number: G11B20/18 ,  G11B20/10268

Abstract: A data processing circuit with flaw robust burst field demodulation includes a burst integration circuit operable to calculate burst integration results for a servo data burst field, a comparison circuit operable to determine whether an absolute value of the burst integration results falls outside a window, and an error indicating circuit operable to indicate that a media flaw has been detected when the absolute value of the burst integration results fall outside the window.

Abstract translation: 具有缺陷鲁棒脉冲串场解调的数据处理电路包括可用于计算伺服数据脉冲串场的脉冲串积分结果的脉冲串积分电路，可用于确定脉冲串积分结果的绝对值是否落在窗外的比较电路， 错误指示电路可操作以指示当突发集成结果的绝对值落在窗口之外时已经检测到介质缺陷。

公开(公告)号：US20140233128A1

公开(公告)日：2014-08-21

申请号：US13886049

申请日：2013-05-02

Applicant: LSI CORPORATION

Inventor： Xun Zhang ,  Haitao Xia ,  Dahua Qin

IPC: G11B20/18

CPC classification number: G11B20/18 ,  G11B20/10268

Abstract: A data processing circuit with flaw robust burst field demodulation includes a burst integration circuit operable to calculate burst integration results for a servo data burst field, a comparison circuit operable to determine whether an absolute value of the burst integration results falls outside a window, and an error indicating circuit operable to indicate that a media flaw has been detected when the absolute value of the burst integration results fall outside the window.

Abstract translation: 具有缺陷鲁棒脉冲串场解调的数据处理电路包括可用于计算伺服数据脉冲串场的脉冲串积分结果的脉冲串积分电路，可用于确定脉冲串积分结果的绝对值是否落在窗外的比较电路， 错误指示电路可操作以指示当突发集成结果的绝对值落在窗口之外时已经检测到介质缺陷。

公开(公告)号：US20140139939A1

公开(公告)日：2014-05-22

申请号：US13773886

申请日：2013-02-22

Applicant: LSI CORPORATION

Inventor： Dahua Qin ,  Haitao Xia ,  Xun Zhang

IPC: G11B20/10

CPC classification number: G11B20/10 ,  G11B20/10203 ,  G11B20/10268 ,  G11B20/1403 ,  G11B2020/1484

Abstract: Various embodiments of the present inventions provide systems and methods for adaptive servo address mark detection.

Abstract translation: 本发明的各种实施例提供了用于自适应伺服地址标记检测的系统和方法。