公开(公告)号：US20150380047A1

公开(公告)日：2015-12-31

申请号：US14318666

申请日：2014-06-29

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  George Mathew

IPC: G11B20/10 ,  H04B1/12 ,  H04L25/08

CPC classification number: G11B20/10046 ,  H04B1/123 ,  H04L25/08

Abstract: A data processing system includes an adaptive notch filter operable to estimate an interference frequency in data samples, a convergence detector operable to determine whether the interference frequency converges on a value, indicating that the data samples contain interference, and an interference removal circuit operable to remove interference detected by the adaptive notch filter from the data samples.

Abstract translation: 数据处理系统包括可用于估计数据样本中的干扰频率的自适应陷波滤波器，可收敛检测器，其可操作以确定干扰频率是否收敛于指示数据样本包含干扰的值，以及干扰去除电路，其可操作以去除 干扰由数据采样自适应陷波滤波器检测。

公开(公告)号：US08976477B1

公开(公告)日：2015-03-10

申请号：US14198830

申请日：2014-03-06

Applicant: LSI Corporation

Inventor： Eui Seok Hwang ,  George Mathew ,  Xiufeng Song

IPC: G11B5/09

CPC classification number: G11B20/1403 ,  G11B5/59616 ,  G11B5/59644 ,  G11B20/10222 ,  G11B2020/1476

Abstract: The disclosure is directed to a system and method of generating soft-orthogonal syncmarks for at least a first set of tracks and a second set of tracks. Random pairs of sync patterns are searched to identify one or more pairs where the sync patterns of each pair exhibit delta-like autocorrelation and small cross-correlation with each other and with preamble portions of the tracks. Then a pair of sync patterns is selected from the one or more identified pairs, where the selected pair includes sync patterns that are distinguishable from the user data portions of the tracks at least partially based upon a data characteristic of the user data portions of the tracks. The selected pair of sync patterns is then used to generate a first syncmark for the first set of tracks and a second syncmark for the second set of tracks.

Abstract translation: 本公开涉及一种用于为至少第一组轨道和第二组轨道生成软正交同步标记的系统和方法。 搜索随机对同步模式以识别一对或多个对，其中每对的同步模式表现出类似三角形的自相关和彼此之间的小互相关以及轨道的前导码部分。 然后从一个或多个识别的对中选择一对同步模式，其中所选择的对包括至少部分地基于轨道的用户数据部分的数据特征可区分于轨道的用户数据部分的同步模式 。 所选择的一对同步模式然后用于为第一组轨道生成第一同步标记，并为第二组轨道生成第二同步标记。

公开(公告)号：US09281006B2

公开(公告)日：2016-03-08

申请号：US14148407

申请日：2014-01-06

Applicant: LSI Corporation

Inventor： Lu Lu ,  Haitao Xia ,  Lu Pan ,  Xiufeng Song

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B20/10212

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to data processing including adjacent track interference detection and/or characterization.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及包括相邻轨道干扰检测和/或表征的数据处理。

公开(公告)号：US09214185B1

公开(公告)日：2015-12-15

申请号：US14318666

申请日：2014-06-29

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  George Mathew

IPC: G11B5/035 ,  G11B20/10 ,  H04L25/08 ,  H04B1/12

CPC classification number: G11B20/10046 ,  H04B1/123 ,  H04L25/08

Abstract: A data processing system includes an adaptive notch filter operable to estimate an interference frequency in data samples, a convergence detector operable to determine whether the interference frequency converges on a value, indicating that the data samples contain interference, and an interference removal circuit operable to remove interference detected by the adaptive notch filter from the data samples.

Abstract translation: 数据处理系统包括可用于估计数据样本中的干扰频率的自适应陷波滤波器，可收敛检测器，其可操作以确定干扰频率是否收敛于指示数据样本包含干扰的值，以及干扰去除电路，其可操作以去除 干扰由数据采样自适应陷波滤波器检测。

公开(公告)号：US20150262592A1

公开(公告)日：2015-09-17

申请号：US14217886

申请日：2014-03-18

Applicant: LSI Corporation

Inventor： Xiufeng Song

IPC: G11B5/09 ,  G11B20/10 ,  G11B20/18

CPC classification number: G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10305 ,  G11B20/10481 ,  G11B20/1876 ,  G11B27/36

Abstract: Systems, methods, devices and circuits for data amplification, and more particularly systems and methods for characterizing distortion introduced during data amplification. In some cases, an amplifier modeling circuit is discussed that receives a preamplifier status input from a preamplifier circuit; applies a vector fitting algorithm to the preamplifier status to yield a pole value; determines that the pole value is greater than unity; and replaces the pole value with an inverse of the pole value when the pole value is greater than unity.

Abstract translation: 用于数据放大的系统，方法，设备和电路，更具体地说，用于表征在数据放大期间引入的失真的系统和方法。 在一些情况下，讨论了从前置放大器电路接收前置放大器状态输入的放大器建模电路; 对前置放大器状态应用向量拟合算法以产生极值; 确定极值大于单位; 并且当极值大于1时，用极值的反相代替极值。

公开(公告)号：US20140334278A1

公开(公告)日：2014-11-13

申请号：US13894680

申请日：2013-05-15

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Richard Rauschmayer

IPC: G11B5/60

CPC classification number: G11B5/6076 ,  G11B5/607

Abstract: The present inventions are related to systems and methods for determining contact between two elements, and more particularly to systems and methods for determining contact between a head assembly and a storage medium.

Abstract translation: 本发明涉及用于确定两个元件之间的接触的系统和方法，更具体地涉及用于确定头部组件和存储介质之间的接触的系统和方法。

公开(公告)号：US08810955B1

公开(公告)日：2014-08-19

申请号：US14179923

申请日：2014-02-13

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  George Mathew

IPC: G11B21/02

CPC classification number: G11B5/6029

Abstract: The disclosure is directed to monitoring changes in fly height for a plurality of read heads. Readback signals based upon a first periodic data sequence and a second periodic data sequence are detected using at least a first read head and a second read head at a first point in time corresponding to a first fly height of each read head and at a second point in time corresponding to a second fly height each read head. The difference between the first fly height and the second fly height of the first read head and the difference between the first fly height and the second fly height of the second read head are determined by comparing the respectively detected readback signals. A summation of the difference values, each having been multiplied by a fusion coefficient, is then used to estimate a global change in fly height.

Abstract translation: 本公开旨在监测多个读取头的飞行高度的变化。 基于第一周期性数据序列和第二周期性数据序列的回读信号使用至少第一读取头和第二读取头，在对应于每个读取头的第一飞行高度的第一时间点和第二点 时间对应于每个读取头的第二飞行高度。 通过比较分别检测的回读信号来确定第一读取头的第一飞行高度和第二飞行高度之间的差异以及第二读取头的第一飞行高度和第二飞行高度之间的差异。 然后使用差分值的总和，每个差值已经乘以融合系数，以估计飞行高度的全局变化。