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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。
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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
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。
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3.发明授权Method and system for sliding-window based phase, gain, frequency and DC offset estimation for servo channel 有权用于伺服信道的基于滑窗的相位，增益，频率和直流偏移估计的方法和系统公开(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
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。
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4.发明申请METHODS AND APPARATUS FOR IMPROVED THRESHOLD ADAPTATION FOR A EUCLIDEAN DETECTOR 审中-公开用于改进智能探测器的阈值适应度的方法和装置公开(公告)号：US20150015986A1
公开(公告)日：2015-01-15
申请号：US14323286
申请日：2014-07-03
Applicant: LSI Corporation
Inventor： Linjiang Guo , Zhi Bin Li , Yao Zhao , Dahua Qin
IPC: G11B5/596
CPC classification number: G11B5/59627 , G11B5/59688
Abstract: Improved threshold adaptation is provided for a predefined pattern in data. A detection threshold employed by a Euclidean detector to detect a pattern (such as a Servo Address Mark) in data is adapted by determining a minimum Euclidean distance metric Dp before the pattern is declared in a given portion of the data; determining a Euclidean distance metric Ds at a time when the pattern is found in the given portion, wherein at least one of the patterns is found using a Hamming detector; determining, for a plurality of the portions, a minimum Dp value, Dpmin, that is a substantial minimum Dp value for the plurality of portions and a maximum Ds value, Dsmax, that is a substantial maximum Ds value for the plurality of portions; and determining the detection threshold based on the minimum Dp value, Dpmin, and the maximum Ds value, Dsmax. The detection threshold is optionally based on a configurable margin gain value.
Abstract translation: 为数据中的预定义模式提供了改进的阈值适配。 通过在数据的给定部分中声明模式之前确定最小欧几里得距离度量Dp，来适应欧几里得检测器检测数据中的模式（例如伺服地址标记）的检测阈值; 确定在所述给定部分中发现所述图案时的欧几里得距离度量Ds，其中使用汉明检测器找到所述图案中的至少一个; 对于多个部分，确定作为多个部分的实质最小Dp值的最小Dp值Dpmin，以及作为多个部分的实质最大Ds值的最大Ds值Dsmax; 并且基于最小Dp值Dpmin和最大Ds值Dsmax来确定检测阈值。 检测阈值可选地基于可配置的裕量增益值。
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5.发明申请Method and System for Sliding-Window Based Phase, Gain, Frequency and DC Offset Estimation for Servo Channel 有权用于滑动窗口相位的方法和系统，用于伺服信道的增益，频率和直流偏移估计公开(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
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。
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Patent Agency Ranking
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
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。
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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。
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公开(公告)号：US09244752B2
公开(公告)日：2016-01-26
申请号：US13912109
申请日：2013-06-06
Applicant: LSI Corporation
Inventor： Dahua Qin , Xun Zhang , Haitao Xia
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。
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公开(公告)号：US08995072B1
公开(公告)日：2015-03-31
申请号：US14135984
申请日：2013-12-20
Applicant: LSI Corporation
Inventor： Dahua Qin , Xun Zhang , Lu Lu , Haitao Xia , Jianzhong Huang
CPC classification number: G11B5/09 , G11B5/59611 , G11B5/59688 , G11B20/10009
Abstract: A servo system includes a detector circuit operable to apply a data detection algorithm to digital 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 digital data to yield an error signal, a scaling circuit operable to scale the error signal to yield a scaled noise signal, an adder operable to add the scaled noise signal to the digital data to yield noise-added digital data, and a second detector circuit operable to apply a second data detection algorithm to the noise-added digital data to yield output hard decisions.
Abstract translation: 伺服系统包括检测器电路，可操作以将数据检测算法应用于数字数据以产生硬判决，卷积电路可操作以基于硬判决和目标值产生理想数字数据，减法电路可操作以减去理想数字 来自数字数据的数据以产生误差信号，缩放电路，可操作以缩放误差信号以产生缩放的噪声信号;加法器，可操作以将缩放的噪声信号添加到数字数据以产生噪声附加的数字数据;以及 第二检测器电路可操作以将第二数据检测算法应用于经噪声增加的数字数据以产生输出硬判决。
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公开(公告)号：US20140268397A1
公开(公告)日：2014-09-18
申请号：US13851734
申请日：2013-03-27
Applicant: LSI CORPORATION
Inventor： Xun Zhang , Haitao Xia , Dahua Qin
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。
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