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    Timing error detector with diversity loop detector decision feedback
    1.
    发明授权
    Timing error detector with diversity loop detector decision feedback 有权
    具有分集环路检测器判定反馈的定时误差检测器

    公开(公告)号：US09275655B2

    公开(公告)日：2016-03-01

    申请号：US13941464

    申请日：2013-07-13

    Applicant: LSI Corporation

    Inventor： Bruce Wilson ,  Yang Han ,  Yu Kou ,  Rui Cao

    IPC: G11B20/14 ,  G11B5/09 ,  G11B20/10

    CPC classification number: G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10222 ,  G11B20/1403 ,  G11B2220/2516

    Abstract: Aspects of the disclosure pertain to an apparatus for detecting timing errors including an analog to digital converter circuit, a diversity loop detector and a timing error calculation circuit. The analog to digital converter circuit is operable to convert an input signal into a series of digital samples. The diversity loop detector is operable to apply a data detection algorithm to a plurality of signals derived from the series of digital samples at different phase offsets, to select one of the phase offsets, and to yield a detected output with the selected phase offset. The timing error calculation circuit is operable to calculate a timing error of the analog to digital converter circuit based at least in part on the selected phase offset.

    Abstract translation: 本公开的方面涉及用于检测定时误差的装置，包括模数转换器电路，分集环路检测器和定时误差计算电路。 模数转换器电路可操作以将输入信号转换为一系列数字采样。 分集环路检测器可操作以将数据检测算法应用于在不同相位偏移处从一系列数字样本导出的多个信号，以选择相位偏移中的一个，并产生具有所选相位偏移的检测输出。 定时误差计算电路可用于至少部分地基于所选择的相位偏移来计算模数转换器电路的定时误差。

    Systems and methods for loop pulse estimation
    3.
    发明授权
    Systems and methods for loop pulse estimation 有权
    环路脉冲估计的系统和方法

    公开(公告)号：US08929010B1

    公开(公告)日：2015-01-06

    申请号：US14029559

    申请日：2013-09-17

    Applicant: LSI Corporation

    Inventor： Rui Cao ,  Yu Kou ,  Xuebin Wu ,  Yang Han

    IPC: G11B20/10 ,  G11B5/035 ,  H04L25/03

    CPC classification number: H04L25/03885 ,  G11B5/09 ,  G11B20/10027 ,  H04L25/0212 ,  H04L25/0238 ,  H04L25/025

    Abstract: A data processing system includes a digital data input operable to receive digital data, a digital data values input operable to receive values of the digital data, a loop pulse response estimation circuit operable to calculate a loop pulse response based on the digital data and the values of the digital data and based at least in part on past values of the loop pulse response, and a scaling circuit operable to scale the loop pulse response based at least in part on an absolute sum of the loop pulse response to yield a scaled loop pulse response.

    Abstract translation: 数据处理系统包括可操作以接收数字数据的数字数据输入，可操作以接收数字数据值的数字数据值输入;循环脉冲响应估计电路，其可操作以基于数字数据和值计算环路脉冲响应 至少部分地基于环路脉冲响应的过去值，以及缩放电路，其可操作以至少部分地基于环路脉冲响应的绝对和来缩放环路脉冲响应，以产生缩放的环路脉冲 响应。

    Two dimensional magnetic recording system head separation estimator
    4.
    发明授权
    Two dimensional magnetic recording system head separation estimator 有权
    二维磁记录系统头分离估计器

    公开(公告)号：US08861112B1

    公开(公告)日：2014-10-14

    申请号：US14261395

    申请日：2014-04-24

    Applicant: LSI Corporation

    Inventor： Lu Pan ,  Rui Cao ,  Haitao Xia

    IPC: G11B5/09

    CPC classification number: G11B5/09 ,  G11B5/3977 ,  G11B5/4886 ,  G11B5/59644

    Abstract: An apparatus for estimating head separation in an array reader magnetic recording system includes an array reader with multiple read heads operable to read data from a magnetic storage medium, a first preamplifier connected to a first read head, a second preamplifier connected to a second read head, and a head separation estimation circuit connected to the first preamplifier and to the second preamplifier, operable to estimate an integer phase offset and a fractional phase offset between a first signal from the first read head and a second signal from the second read head.

    Abstract translation: 一种用于估计阵列读取器磁记录系统中的磁头分离的装置，包括阵列读取器，具有可操作以从磁存储介质读取数据的多个读取头，连接到第一读取头的第一前置放大器，连接到第二读取头的第二前置放大器 以及连接到第一前置放大器和第二前置放大器的头部分离估计电路，其可操作以估计来自第一读取头的第一信号和来自第二读取头的第二信号之间的整数相位偏移和分数相位偏移。

    Multiple sync mark storage system
    6.
    发明授权
    Multiple sync mark storage system 有权
    多重同步标记存储系统

    公开(公告)号：US09001445B1

    公开(公告)日：2015-04-07

    申请号：US14106537

    申请日：2013-12-13

    Applicant: LSI Corporation

    Inventor： Rui Cao ,  Haitao Xia ,  Lu Lu

    IPC: G11B5/09 ,  G11B5/596 ,  G11B20/10

    CPC classification number: G11B5/59655 ,  G11B5/59616 ,  G11B20/10222

    Abstract: A data processing system includes a number of analog to digital converters operable to sample analog signals obtained from a magnetic storage medium to yield digital signals, multiple sync mark detectors operable to search for a number of different sync marks in the digital signals, and a sync mark detector output comparator operable to compare an output of each of the sync mark detectors to identify detection errors.

    Abstract translation: 数据处理系统包括多个模数转换器，可操作以对从磁存储介质获得的模拟信号进行采样以产生数字信号，多个同步标记检测器可操作以搜索数字信号中的多个不同同步标记，以及同步 标记检测器输出比较器，用于比较每个同步标记检测器的输出以识别检测误差。

    Synchronization mark detection for multi-dimensional magnetic recording
    8.
    发明授权
    Synchronization mark detection for multi-dimensional magnetic recording 有权
    多维磁记录同步标记检测

    公开(公告)号：US09019642B1

    公开(公告)日：2015-04-28

    申请号：US14243539

    申请日：2014-04-02

    Applicant: LSI Corporation

    Inventor： Haitao Xia ,  Rui Cao ,  Lingyan Sun ,  Lu Pan

    IPC: G11B5/09 ,  G11B20/10

    CPC classification number: G11B20/10009 ,  G11B5/02 ,  G11B5/09 ,  G11B5/4886

    Abstract: A method for detecting an information pattern includes obtaining a first sample stream and a second sample stream. The first sample stream and the second sample stream are obtained by sensing recorded information at a target location of a storage medium using a first sensor and a second sensor, respectively. A first metric is computed by comparing the first sample stream to a reference pattern representative of a target information pattern to be detected. A second metric is computed by comparing the second sample stream to the reference pattern. A combined metric is computed by combining the first metric and second metric using a weighting function. The target information pattern is detected using the combined metric.

    Abstract translation: 用于检测信息模式的方法包括获得第一样本流和第二样本流。 通过使用第一传感器和第二传感器分别在存储介质的目标位置处感测记录信息来获得第一采样流和第二采样流。 通过将第一采样流与表示要检测的目标信息模式的参考模式进行比较来计算第一度量。 通过将第二样本流与参考模式进行比较来计算第二度量。 通过使用加权函数组合第一度量和第二度量来计算组合度量。 使用组合度量检测目标信息模式。

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