公开(公告)号：US20130286498A1

公开(公告)日：2013-10-31

申请号：US13834648

申请日：2013-03-15

Applicant: LSI Corporation

Inventor： Erich F. Haratsch ,  Ming Jin ,  George Mathew ,  Jongseung Park ,  Kurt J. Worrell

IPC: G11B20/22

CPC classification number: G11B20/22 ,  G11B5/012 ,  G11B5/09 ,  G11B19/045 ,  G11B20/10009

Abstract: Hardware-based methods and apparatus are provided for inter-track interference mitigation in magnetic recording systems using averaged values. Inter-track interference (ITI) is mitigated in a magnetic recording system by obtaining ITI cancellation data; and providing the ITI cancellation data for ITI mitigation, wherein the ITI mitigation is performed in combination with an averaging procedure for one or more of ITI mitigation of averaged data and averaging of ITI mitigated data. The sector is optionally decoded using the ITI mitigated samples. Samples for one or more side track sectors can also be averaged. The averaged side track samples can be provided as ITI cancellation data for ITI mitigation. The averaging procedure optionally applies a scaling factor to each read value.

Abstract translation: 提供基于硬件的方法和装置，用于使用平均值的磁记录系统中的轨道间干扰减轻。 通过获取ITI取消数据，在磁记录系统中减轻了轨道间干扰（ITI）。 以及提供用于ITI缓解的ITI抵消数据，其中ITI缓解与对平均数据的ITI缓解和ITI缓解数据的平均中的一个或多个的平均过程相结合执行。 可选地使用ITI缓解样本来解码扇区。 也可以对一个或多个侧轨道扇区的采样进行平均。 可以将平均的侧轨样本作为ITI缓解的ITI取消数据提供。 平均过程可选地对每个读取值应用缩放因子。

公开(公告)号：US09286933B2

公开(公告)日：2016-03-15

申请号：US13686164

申请日：2012-11-27

Applicant: LSI Corporation

Inventor： George Mathew ,  Haotian Zhang ,  Haitao Xia ,  Bruce Wilson

IPC: G06F11/00 ,  G11B20/10 ,  H03M13/37 ,  H03M13/00 ,  H03M13/11 ,  H03M13/15 ,  H03M13/41

CPC classification number: G11B20/10009 ,  G11B20/10046 ,  G11B20/10055 ,  H03M13/1105 ,  H03M13/1515 ,  H03M13/3738 ,  H03M13/3753 ,  H03M13/41 ,  H03M13/6331 ,  H03M13/6343

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to data processing including operational marginalization capability. In one case a data processing system is disclosed that includes a loop detector circuit and a sample based noise injection circuit. The loop detector circuit applies a loop detection algorithm to a data input to yield a loop detected output, and the sample based noise injection circuit generates a noise component based at least in part on the loop detected output.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及包括操作边缘化能力的数据处理。 在一种情况下，公开了一种包括环路检测器电路和基于样本的噪声注入电路的数据处理系统。 环路检测器电路将一个环路检测算法应用到一个数据输入端以产生环路检测输出，而基于采样的噪声注入电路至少部分地基于环路检测输出产生噪声分量。

公开(公告)号：US09129651B2

公开(公告)日：2015-09-08

申请号：US14048897

申请日：2013-10-08

Applicant: LSI Corporation

Inventor： George Mathew ,  Angelo R. Mastrocola ,  Robert A. Greene

IPC: G11B5/02 ,  G11B20/06 ,  G11B20/08 ,  G11B5/09 ,  G11B20/10

CPC classification number: G11B20/10268 ,  G11B20/10009 ,  G11B20/10018 ,  G11B20/10046

Abstract: A magnetic recording system includes an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium, a quadrature amplitude modulator operable to combine the analog signals to yield a quadrature amplitude modulated signal, a quadrature amplitude demodulator operable to yield a plurality of demodulated signals from the quadrature amplitude modulated signal corresponding to each channel of the array, and a joint equalizer operable to filter the plurality of demodulated signals to yield an equalized output.

Abstract translation: 磁记录系统包括可操作以接收从磁存储介质检索的模拟信号的模拟输入阵列，可用于组合模拟信号以产生正交幅度调制信号的正交幅度调制器，正交幅度解调器，其可操作以产生多个 来自与阵列的每个通道对应的正交幅度调制信号的解调信号，以及联合均衡器，可操作以对多个解调信号进行滤波以产生均衡的输出。

公开(公告)号：US20150187384A1

公开(公告)日：2015-07-02

申请号：US14180329

申请日：2014-02-13

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Eui Seok Hwang ,  George Mathew

IPC: G11B20/10

CPC classification number: G11B20/10046 ,  G11B20/10037 ,  G11B20/10388

Abstract: A method for enhancing read performance in a multi-reader two-dimensional magnetic recording system comprising first and second readers includes: receiving first and second analog read signals from the first and second readers, respectively; sampling the first and second analog read signals to generate first and second sampled signals, respectively, each of the first and second sampled signals comprising an integer component, indicative of a value of a corresponding one of the first and second analog read signals, respectively, at an integer multiple of a corresponding sampling period associated therewith, and/or a fractional component, indicative of a value of the corresponding one of the first and second analog read signals, respectively, at an arbitrary point in time between integer multiples of the corresponding sampling period; and combining the integer and/or fractional components of the respective first and second sampled signals to thereby generate a reader offset estimation signal.

Abstract translation: 一种用于在包括第一和第二读取器的多读取器二维磁记录系统中提高读取性能的方法，包括：分别从第一和第二读取器接收第一和第二模拟读取信号; 对第一和​​第二模拟读取信号进行采样以分别产生第一和第二采样信号，第一和第二采样信号中的每一个分别包括表示第一和第二模拟读取信号中对应的一个的值的整数分量， 在与其相关联的相应采样周期的整数倍和/或分数分量中，分别表示在对应的第一和第二模拟读取信号的整数倍之间的任意时间点的相应一个的值 抽样期 以及组合相应的第一和第二采样信号的整数和/或分数分量，从而产生读取器偏移估计信号。

公开(公告)号：US09058115B1

公开(公告)日：2015-06-16

申请号：US14109570

申请日：2013-12-17

Applicant: LSI Corporation

Inventor： Jun Xiao ,  Shu Li ,  Fan Zhang ,  George Mathew

IPC: G11B5/09 ,  G11B5/035 ,  G06F3/06 ,  G11B20/10

CPC classification number: G11B20/10046

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to data processing including operational marginalization capability.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及包括操作边缘化能力的数据处理。

公开(公告)号：US20150062730A1

公开(公告)日：2015-03-05

申请号：US14048897

申请日：2013-10-08

Applicant: LSI Corporation

Inventor： George Mathew ,  Angelo R. Mastrocola ,  Robert A. Greene

IPC: G11B20/10

CPC classification number: G11B20/10268 ,  G11B20/10009 ,  G11B20/10018 ,  G11B20/10046

Abstract: A magnetic recording system includes an array of analog inputs operable to receive analog signals retrieved from a magnetic storage medium, a quadrature amplitude modulator operable to combine the analog signals to yield a quadrature amplitude modulated signal, a quadrature amplitude demodulator operable to yield a plurality of demodulated signals from the quadrature amplitude modulated signal corresponding to each channel of the array, and a joint equalizer operable to filter the plurality of demodulated signals to yield an equalized output.

Abstract translation: 磁记录系统包括可操作以接收从磁存储介质检索的模拟信号的模拟输入阵列，可用于组合模拟信号以产生正交幅度调制信号的正交幅度调制器，正交幅度解调器，其可操作以产生多个 来自与阵列的每个通道对应的正交幅度调制信号的解调信号，以及联合均衡器，可操作以对多个解调信号进行滤波以产生均衡的输出。

公开(公告)号：US08947806B1

公开(公告)日：2015-02-03

申请号：US14225543

申请日：2014-03-26

Applicant: LSI Corporation

Inventor： Travis Roger Oenning ,  George Mathew

IPC: G11B5/09

CPC classification number: G11B5/4886 ,  G11B5/012 ,  G11B5/02 ,  G11B20/10046

Abstract: A method of enhancing read performance in array-reader hardware includes generating, by the array-reader hardware, a plurality of signals, according to data read from a magnetic disk, and canceling at least a portion of cross-talk in the plurality of signals to generate a plurality of corrected signals.

Abstract translation: 一种提高阵列读取器硬件中的读取性能的方法包括：根据从磁盘读取的数据，由阵列读取器硬件生成多个信号，以及消除多个信号中的至少一部分串扰 以产生多个校正信号。

公开(公告)号：US20150015984A1

公开(公告)日：2015-01-15

申请号：US14500226

申请日：2014-09-29

Applicant: LSI Corporation

Inventor： Ming Jin ,  Erich F. Haratsch ,  George Mathew ,  Jongseung Park ,  Timothy W. Swatosh ,  Timothy B. Lund ,  Carl E. Forham

IPC: G11B5/09 ,  G11B20/10

CPC classification number: G11B5/09 ,  G11B5/012 ,  G11B19/045 ,  G11B20/10046 ,  G11B20/10212 ,  G11B20/10462 ,  G11B20/1217 ,  G11B20/1423 ,  G11B2020/10759 ,  G11B2020/1232 ,  G11B2020/1298 ,  G11B2020/183 ,  G11B2020/185 ,  G11B2020/1856 ,  G11B2220/2516

Abstract: Described embodiments provide a method of cancelling inter-track interference (ITI) from one or more sectors read from a desired track of a storage medium. A read channel reads sectors in a desired track of the storage medium. A decoder of the read channel decodes the read sectors, and if the read sectors are incorrectly recovered from the storage medium, selected sectors of a first adjacent track and a second adjacent track are read. An ITI canceller of the read channel estimates ITI in the read sectors of the desired track corresponding to the selected sectors of each adjacent track and subtracts the estimated ITI of each adjacent track from the data for the sectors of the desired track, providing updated sector data. The ITI cancelled data is replayed to the decoder, Which decodes the ITT cancelled data and provides the decoded ITI cancelled data as output of the read channel.

Abstract translation: 所描述的实施例提供了从存储介质的期望轨迹读取的一个或多个扇区消除轨道间干扰（ITI）的方法。 读通道读取存储介质的期望轨道中的扇区。 读通道的解码器解码读扇区，并且如果从存储介质中错误地恢复读扇区，则读取第一相邻轨道和第二相邻轨道的选定扇区。 读通道的ITI消除器估计对应于每个相邻磁道的所选扇区的期望磁道的读扇区中的ITI，并从期望磁道的扇区的数据中减去每个相邻磁道的估计ITI，从而提供更新的扇区数据 。 ITI取消的数据被重播到解码器，解码器解码ITT取消的数据，并将解码的ITI取消的数据作为读取通道的输出。

公开(公告)号：US08929011B1

公开(公告)日：2015-01-06

申请号：US14055886

申请日：2013-10-17

Applicant: LSI Corporation

Inventor： Xiufeng Song ,  Eui Seok Hwang ,  George Mathew

IPC: G11B20/10 ,  G11B27/32 ,  G11B20/14

CPC classification number: G11B20/10222 ,  G11B20/14 ,  G11B27/3027 ,  G11B27/32

Abstract: A data processing system includes an analog to digital converter operable to sample an analog signal obtained from a magnetic storage medium to yield digital samples, and a sync mark detector operable to search for a particular one of a number of sync marks in the digital samples. Each of the data tracks on the magnetic storage medium is associated with one of the sync marks. The sync mark on each of the data tracks has a different pattern than the sync marks on neighboring tracks.

Abstract translation: 数据处理系统包括模数转换器，其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样本;以及同步标记检测器，其可操作以搜索数字样本中的多个同步标记中的特定一个。 磁存储介质上的每个数据轨道与同步标记中的一个相关联。 每个数据轨道上的同步标记具有与相邻轨道上的同步标记不同的图案。

公开(公告)号：US08854757B2

公开(公告)日：2014-10-07

申请号：US13705116

申请日：2012-12-04

Applicant: LSI Corporation

Inventor： George Mathew ,  Jongseung Park ,  Erich F. Haratsch ,  Bruce A. Wilson

IPC: G11B5/09 ,  G11B20/10

CPC classification number: G11B20/10212 ,  G11B19/045

Abstract: Systems and methods for data processing, and more particularly to estimating or calculating interference between tracks on a storage medium.

Abstract translation: 用于数据处理的系统和方法，更具体地涉及估计或计算存储介质上的轨道之间的干扰。