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51. 发明授权

US08154818B2 Systems and methods for adaptive CBD estimation in a storage device 有权
标题翻译：存储设备中自适应CBD估计的系统和方法
公开(公告)号：US08154818B2
公开(公告)日：2012-04-10
申请号：US12663345
申请日：2008-10-20
申请人： George Mathew , Yuan Xing Lee , Hongwei Song , Jefferson E. Singleton
发明人： George Mathew , Yuan Xing Lee , Hongwei Song , Jefferson E. Singleton
IPC分类号： G11B21/02
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for adaptive channel bit density estimation. For example, various embodiments of the present invention provide methods for adaptively estimating channel bit density. Such methods include providing a storage medium (178) that includes information corresponding to a process data set, and accessing the process data set from the storage medium (505). A first channel bit density estimate (535) is computed based at least in part on a first portion of the process data set (520-530), and a second channel bit density estimate (535) is calculated based at least in part on the first portion of the process data set, a second portion of the process data set (520-530) and the first channel bit density estimate (535).
摘要翻译：本发明的各种实施例提供了用于自适应信道比特密度估计的系统和方法。例如，本发明的各种实施例提供了自适应地估计信道比特密度的方法。这样的方法包括提供包括与过程数据集相对应的信息的存储介质（178），以及从存储介质（505）访问过程数据集。至少部分地基于过程数据集（520-530）的第一部分来计算第一信道比特密度估计（535），并且至少部分地基于所述第二信道比特密度估计过程数据集的第一部分，过程数据集（520-530）的第二部分和第一信道比特密度估计（535）。

52. 发明申请

US20120068752A1 Systems and Methods for Low Latency Noise Cancellation 有权
标题翻译：低延迟噪声消除系统和方法
公开(公告)号：US20120068752A1
公开(公告)日：2012-03-22
申请号：US12887369
申请日：2010-09-21
申请人： Jingfeng Liu , Haotian Zhang , Hongwei Song , George Mathew
发明人： Jingfeng Liu , Haotian Zhang , Hongwei Song , George Mathew
IPC分类号： H03H11/26 , H03K5/01
CPC分类号： G11B20/10046 , G11B20/10509
摘要： Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing circuit is discussed that includes a data detector circuit, a detector mimicking circuit, and an error calculation circuit. The data detector circuit is operable to perform a data detection process on a first signal derived from a data input to yield a detected output. The data mimicking circuit is operable to process a second signal derived from the data input to yield a mimicked output. The error calculation circuit is operable to calculate a difference between the second signal and a third signal derived from the mimicked output to yield a feedback signal. The feedback signal is operable to modify the data input during a subsequent period.
摘要翻译：本发明的各种实施例提供了用于数据处理的系统和方法。例如，讨论了包括数据检测器电路，检测器模拟电路和误差计算电路的数据处理电路。数据检测器电路可操作以对从数据输入导出的第一信号执行数据检测处理，以产生检测到的输出。数据模拟电路可操作以处理从数据输入得到的第二信号以产生模拟输出。误差计算电路可用于计算第二信号和从模拟输出得到的第三信号之间的差以产生反馈信号。反馈信号可操作以在随后的时段内修改数据输入。

53. 发明申请

US20120033323A1 Systems and Methods for Servo Data Based Harmonics Calculation 有权
标题翻译：基于伺服数据的谐波计算系统与方法
公开(公告)号：US20120033323A1
公开(公告)日：2012-02-09
申请号：US12851455
申请日：2010-08-05
申请人： George Mathew , Xun Zhang , Hongwei Song
发明人： George Mathew , Xun Zhang , Hongwei Song
IPC分类号： G11B21/02 , G11B5/127 , G01R23/00
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for servo data based harmonics calculation. For example, a circuit for determining harmonics is disclosed that includes an analog to digital conversion circuit that provides a series of digital samples corresponding to a pattern within a servo data region of a storage medium, and a harmonic calculation circuit. The harmonic calculation circuit is operable to calculate a first harmonic value for the series of digital samples, calculate a second harmonic value for the series of digital samples, and calculate a ratio of the first harmonic value to the second harmonic value.
摘要翻译：本发明的各种实施例提供了用于基于伺服数据的谐波计算的系统和方法。例如，公开了一种用于确定谐波的电路，其包括提供与存储介质的伺服数据区域内的模式相对应的一系列数字样本的模数转换电路和谐波计算电路。谐波计算电路可操作地计算一系列数字采样的一次谐波值，计算一系列数字采样的二次谐波值，并计算一次谐波值与二次谐波值的比值。

54. 发明申请

US20120026623A1 DIBIT EXTRACTION FOR ESTIMATION OF CHANNEL PARAMETERS 有权
标题翻译：用于估计通道参数的DIBIT提取
公开(公告)号：US20120026623A1
公开(公告)日：2012-02-02
申请号：US12845110
申请日：2010-07-28
申请人： George Mathew , Hongwei Song , Yuan Xing Lee
发明人： George Mathew , Hongwei Song , Yuan Xing Lee
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10212 , G11B20/10305 , G11B20/10462 , G11B20/10481
摘要： In one embodiment, a storage-device-implemented method for estimating one or more channel parameters of a storage device including a read channel and a storage medium with a bit sequence stored on the storage medium. The method includes: (a) the storage device reading at least a portion of the bit sequence from the storage medium to generate a bit response; (b) the storage device convolving the bit response to compute an impulse response of the read channel; and (c) the storage device estimating one or more channel parameters based on the computed impulse response.
摘要翻译：在一个实施例中，一种用于估计存储设备的一个或多个信道参数的存储设备实现的方法，所述存储设备包括读取通道和具有存储在存储介质上的位序列的存储介质。该方法包括：（a）存储装置从存储介质中读取比特序列的至少一部分以产生比特响应; （b）所述存储装置卷积所述位响应以计算所述读通道的脉冲响应; 以及（c）所述存储装置基于所计算的脉冲响应来估计一个或多个信道参数。

55. 发明授权

US08095855B2 Systems and methods for regenerating data from a defective medium 失效
标题翻译：从缺陷介质再生数据的系统和方法
公开(公告)号：US08095855B2
公开(公告)日：2012-01-10
申请号：US12111902
申请日：2008-04-29
申请人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
发明人： Weijun Tan , Shaohua Yang , George Mathew , Kelly Fitzpatrick , Hao Zhong , Yuan Xing Lee
IPC分类号： H03M13/00
CPC分类号： G06F11/0793 , G06F11/0727 , G11B20/1816
摘要： Various embodiments of the present invention provide systems and methods for data regeneration. For example, a system for data regeneration is disclosed that includes a data input derived from the medium. A data detector and a data recovery system receive the data input. The data detector provides a first soft output, and the data recovery system provides a second soft output. The first soft output and the second soft output are provided to a multiplexer. A media defect detector performs a media defect detection process, and provides a defect flag that indicates whether the data input is derived form a defective portion of the medium. The defect flag is provided to the multiplexer where it is used to select whether the first soft output or the second soft output is provides as an extrinsic output.
摘要翻译：本发明的各种实施例提供了用于数据再生的系统和方法。例如，公开了一种用于数据再生的系统，其包括从介质导出的数据输入。数据检测器和数据恢复系统接收数据输入。数据检测器提供第一软输出，数据恢复系统提供第二软输出。第一软输出和第二软输出被提供给多路复用器。介质缺陷检测器执行介质缺陷检测处理，并提供指示数据输入是否从介质的缺陷部分导出的缺陷标志。缺陷标志被提供给多路复用器，其中它用于选择第一软输出或第二软输出是作为外在输出提供。

56. 发明授权

US08077427B2 Fly-height control using asynchronous sampling 有权
标题翻译：飞高控制采用异步采样
公开(公告)号：US08077427B2
公开(公告)日：2011-12-13
申请号：US12758122
申请日：2010-04-12
申请人： George Mathew , Jeffrey Grundvig , Hongwei Song , Yuan Xing Lee
发明人： George Mathew , Jeffrey Grundvig , Hongwei Song , Yuan Xing Lee
IPC分类号： G11B5/60
CPC分类号： G11B5/6029 , G11B5/012 , G11B5/6064
摘要： In one embodiment, a hard-disk drive system performs fly-height control using a read-back mode and a loop-back mode. The read-back mode measures first and second harmonics pre-recorded on the medium and divides the first measurement by the second to obtain a read-back mode harmonic ratio. The loop-back mode measures the same first and second harmonics; however, the harmonics are provided by a write precompensation circuit rather than the medium. Further, the loop-back mode measurements are performed using asynchronous sampling to address aliasing and quantization errors. The first measurement is divided by the second to generate a loop-back harmonic ratio. In logarithm domain, the loop-back ratio is subtracted from the read-back mode ratio to remove environment-induced variations in the read path electronic circuits. The resulting harmonic ratio is subtracted from an initial harmonic ratio determined, for example, during manufacturing, to determine how much the harmonic ratio has changed.
摘要翻译：在一个实施例中，硬盘驱动器系统使用回读模式和循环模式来执行飞行高度控制。回读模式测量在介质上预先记录的第一和第二次谐波，并将第一次测量除以秒，以获得回读模式谐波比。环回模式测量相同的第一和第二谐波; 然而，谐波由写入预补偿电路而不是介质提供。此外，使用异步采样来执行环回模式测量以解决混叠和量化误差。第一次测量除以二次以产生回路谐波比。在对数域中，从回读模式比率中减去回路比，以消除读取路径电子电路中的环境引起的变化。从制造时例如确定的初始谐波比减去得到的谐波比，以确定谐波比已经改变了多少。

57. 发明授权

US08031420B2 Frequency-based approach for detection and classification of hard-disc defect regions 有权
标题翻译：基于频率的硬盘缺陷区域检测和分类方法
公开(公告)号：US08031420B2
公开(公告)日：2011-10-04
申请号：US12707820
申请日：2010-02-18
申请人： George Mathew , Yang Han , Shaohua Yang , Zongwang Li , Yuan Xing Lee
发明人： George Mathew , Yang Han , Shaohua Yang , Zongwang Li , Yuan Xing Lee
IPC分类号： G11B27/36 , G11B5/02
CPC分类号： G11B20/1816 , G11B19/041 , G11B27/36
摘要： In a hard-disc drive read channel, frequency-based measures are generated at two different data frequencies (e.g., 2T and DC) by applying a transform, such as a discrete Fourier transform (DFT), to signal values, such as ADC or equalizer output values, corresponding to, e.g., a 2T data pattern stored on the hard disc. The frequency-based measures are used to detect defect regions on the hard disc and/or to classify defect regions as being due to either thermal asperity (TA) or drop-out media defect (MD).
摘要翻译：在硬盘驱动读取通道中，通过将诸如离散付里叶变换（DFT）之类的变换应用于信号值（例如ADC或ADC），以两个不同的数据频率（例如，2T和DC）生成基于频率的测量均衡器输出值，对应于例如存储在硬盘上的2T数据模式。基于频率的测量用于检测硬盘上的缺陷区域和/或将缺陷区域分类为由于热粗糙度（TA）或脱落介质缺陷（MD）引起的。

58. 发明申请

US20110164669A1 Systems and Methods for Determining Noise Components in a Signal Set 有权
标题翻译：用于确定信号组噪声分量的系统和方法
公开(公告)号：US20110164669A1
公开(公告)日：2011-07-07
申请号：US12652201
申请日：2010-01-05
申请人： George Mathew , Shaohua Yang , Yuan Xing Lee , Hongwei Song
发明人： George Mathew , Shaohua Yang , Yuan Xing Lee , Hongwei Song
IPC分类号： H04B17/00
CPC分类号： G11B20/10046 , H04B17/345
摘要： Various embodiments of the present invention provide systems and methods for estimating noise components in a received signal set. For example, one embodiment of the present invention provides a noise estimation circuit that includes a data detector circuit and a noise component calculation circuit. The data detector circuit receives a series of data samples and provides a detected output, and the noise component calculation circuit provides an electronics noise power output and a media noise power output each calculated based at least in part on the detected output and the series of data samples.
摘要翻译：本发明的各种实施例提供了用于估计接收信号组中的噪声分量的系统和方法。例如，本发明的一个实施例提供了一种包括数据检测器电路和噪声分量计算电路的噪声估计电路。数据检测器电路接收一系列数据样本并提供检测的输出，并且噪声分量计算电路提供电子噪声功率输出和媒体噪声功率输出，每个至少部分地基于所检测的输出和数据系列计算样品。

59. 发明授权

US07974030B2 Systems and methods for dibit correction 有权
标题翻译：双向校正的系统和方法
公开(公告)号：US07974030B2
公开(公告)日：2011-07-05
申请号：US12463626
申请日：2009-05-11
申请人： George Mathew , Hongwei Song , Yuan Xing Lee
发明人： George Mathew , Hongwei Song , Yuan Xing Lee
IPC分类号： G11B20/10
CPC分类号： G11B20/10203 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for providing a corrected dibit signal. As an example, various embodiments of the present invention provide dibit correction circuits. Such dibit correction circuits include a dibit sample buffer, a maximum sample detector circuit, a side sample detector circuit, and a dibit correction circuit. The dibit sample buffer includes a plurality of samples of an uncorrected dibit signal. The maximum sample detector circuit identifies a maximum sample of the plurality of samples of the uncorrected dibit signal, and the side sample detector circuit identifies a first side sample prior to the maximum sample on the uncorrected dibit signal and a second side sample following the maximum sample on the uncorrected dibit signal. The dibit correction circuit applies a correction factor calculated based at least in part on the maximum sample, the first side sample and the second side sample to at least a subset of the plurality of samples of the uncorrected dibit signals to yield a plurality of corrected dibit signals.
摘要翻译：本发明的各种实施例提供了用于提供校正的双位信号的系统和方法。作为示例，本发明的各种实施例提供双向校正电路。这种二进制校正电路包括二进制采样缓冲器，最大采样检测器电路，侧样本检测器电路和二位校正电路。双位采样缓冲器包括多个未校正的双位信号的样本。最大样本检测器电路识别未校正的双位信号的多个样本的最大样本，并且侧样本检测器电路识别在未校正的双位信号上的最大样本之前的第一侧样本，以及最大样本之后的第二侧样本对未校正的双位信号。双向校正电路将至少部分地基于最大采样，第一侧采样和第二侧采样计算的校正因子应用于未校正的双位信号的多个采样的至少一个子集，以产生多个校正的双位信号。

60. 发明授权

US07859780B2 Systems and methods for on-the-fly write pre-compensation estimation 有权
标题翻译：用于即时写入预补偿估计的系统和方法
公开(公告)号：US07859780B2
公开(公告)日：2010-12-28
申请号：US12199379
申请日：2008-08-27
申请人： George Mathew , Yuan Xing Lee , Hongwei Song
发明人： George Mathew , Yuan Xing Lee , Hongwei Song
IPC分类号： G11B5/09 , G11B5/02
CPC分类号： G11B5/09 , G11B20/10194
摘要： Various embodiments of the present invention provide systems and methods for write pre-compensation. For example, various embodiments of the present invention provide systems for on-the-fly estimation of write pre-compensation values. Such systems include a magnetic storage medium, a read/write head assembly disposed in relation to the magnetic storage medium, and an analog to digital converter that receives an analog signal from the read/write head assembly corresponding to a data set stored on the magnetic storage medium and provides a series of digital samples corresponding to the data set. The storage devices further include a read data processing circuit that receives the same series of digital samples and provides a user data output, and a pre-compensation value calculation circuit that receives the series of digital samples and provides an updated write pre-compensation value.
摘要翻译：本发明的各种实施例提供了用于写入预补偿的系统和方法。例如，本发明的各种实施例提供用于写入预补偿值的即时估计的系统。这样的系统包括磁存储介质，相对于磁存储介质设置的读/写头组件和模数转换器，其从读/写头组件接收对应于存储在磁盘上的数据集的模拟信号并提供与数据集相对应的一系列数字样本。存储装置还包括读取数据处理电路，其接收相同系列的数字样本并提供用户数据输出，以及预补偿值计算电路，其接收一系列数字样本并提供更新的写入预补偿值。

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