公开(公告)号：US20100088357A1

公开(公告)日：2010-04-08

申请号：US12247378

申请日：2008-10-08

申请人： George Mathew ,  Yuan Xing Lee ,  Hongwei Song ,  David L. Parker ,  Scott M. Dziak

发明人： George Mathew ,  Yuan Xing Lee ,  Hongwei Song ,  David L. Parker ,  Scott M. Dziak

IPC分类号： G06F7/38 ,  G06F7/50 ,  G06F7/52

CPC分类号： H04B17/327 ,  H04B17/26

摘要： Various embodiments of the present invention provide systems and methods for estimating signal and noise powers in a received signal set. For example, one embodiment of the present invention provides a method for determining signal power and noise power. The method uses a storage medium that includes a Na×Nw data pattern. The Na×Nw data pattern includes Na bits repeated Nw times. Both Na and Nw are each greater than one. The methods further include performing an initial read of the Na×Nw data pattern, which is stored to a first register. Nr subsequent reads of the Na×Nw data pattern are each processed by: performing a subsequent read of the Na×Nw data pattern, and performing a difference calculation using the initial read of the Na×Nw data pattern and the subsequent read of the Na×Nw data pattern and resulting in the calculation of a difference vector that is stored to a second register; and performing a difference accumulation calculation to generate an accumulation vector which is stored to a third register. Based at least in part on the stored Na×Nw data pattern and the stored difference vector, an electronics noise power is calculated.

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信号和噪声功率的系统和方法。 例如，本发明的一个实施例提供了一种用于确定信号功率和噪声功率的方法。 该方法使用包括Na×Nw数据模式的存储介质。 Na×Nw数据模式包括重复N次的Na比特。 Na和Nw都大于1。 所述方法还包括执行存储到第一寄存器的Na×Nw数据模式的初始读取。 N×Nw数据模式的后续读取各自通过以下处理：执行Na×Nw数据模式的后续读取，并且使用Na×Nw数据模式的初始读取和随后的Na读数执行差分计算 ×Nw数据模式，并导致存储到第二寄存器的差矢量的计算; 以及执行差积累计算，以产生存储到第三寄存器的累加向量。 至少部分地基于存储的Na×Nw数据模式和存储的差分矢量，计算电子噪声功率。

公开(公告)号：US09281908B2

公开(公告)日：2016-03-08

申请号：US12247378

申请日：2008-10-08

申请人： George Mathew ,  Yuan Xing Lee ,  Hongwei Song ,  David L. Parker ,  Scott M. Dziak

发明人： George Mathew ,  Yuan Xing Lee ,  Hongwei Song ,  David L. Parker ,  Scott M. Dziak

IPC分类号： G06F17/10 ,  H04B17/327 ,  H04B17/26

CPC分类号： H04B17/327 ,  H04B17/26

摘要： Various embodiments of the present invention provide systems and methods for estimating signal and noise powers in a received signal set. For example, one embodiment of the present invention provides a method for determining signal power and noise power. The method uses a storage medium that includes a Na×Nw data pattern. The Na×Nw data pattern includes Na bits repeated Nw times. Both Na and Nw are each greater than one. The methods further include performing an initial read of the Na×Nw data pattern, which is stored to a first register. Nr subsequent reads of the Na×Nw data pattern are each processed by: performing a subsequent read of the Na×Nw data pattern, and performing a difference calculation using the initial read of the Na×Nw data pattern and the subsequent read of the Na×Nw data pattern and resulting in the calculation of a difference vector that is stored to a second register; and performing a difference accumulation calculation to generate an accumulation vector which is stored to a third register. Based at least in part on the stored Na×Nw data pattern and the stored difference vector, an electronics noise power is calculated.

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信号和噪声功率的系统和方法。 例如，本发明的一个实施例提供了一种用于确定信号功率和噪声功率的方法。 该方法使用包括Na×Nw数据模式的存储介质。 Na×Nw数据模式包括重复N次的Na比特。 Na和Nw都大于1。 所述方法还包括执行存储到第一寄存器的Na×Nw数据模式的初始读取。 N×Nw数据模式的后续读取各自通过以下处理：执行Na×Nw数据模式的后续读取，并且使用Na×Nw数据模式的初始读取和随后的Na读数执行差分计算 ×Nw数据模式，并导致存储到第二寄存器的差矢量的计算; 以及执行差积累计算，以产生存储到第三寄存器的累加向量。 至少部分地基于存储的Na×Nw数据模式和存储的差分矢量，计算电子噪声功率。

公开(公告)号：US08300349B2

公开(公告)日：2012-10-30

申请号：US12851425

申请日：2010-08-05

申请人： George Mathew ,  Suharli Tedja ,  Hongwei Song ,  Robert A. Greene ,  Yuan Xing Lee

发明人： George Mathew ,  Suharli Tedja ,  Hongwei Song ,  Robert A. Greene ,  Yuan Xing Lee

IPC分类号： G11B21/02 ,  G11B5/09

CPC分类号： G11B5/6029 ,  G11B20/10018 ,  G11B20/10481 ,  G11B2220/2516

摘要： Various embodiments of the present invention provide systems and methods for servo data based harmonics calculation. For example, a method for calculating harmonics is disclosed that includes: providing a data processing circuit; receiving a first data set derived from a data source during a servo data processing period; performing a first harmonics calculation using the first data set to yield a first harmonics ratio; receiving a second data set derived from a source other than the previously mentioned data source during a user data processing period; performing a second harmonics calculation using the second data set to yield a second harmonics ratio; and calculating a ratio of the first harmonics ratio to the second harmonics ratio.

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，公开了一种用于计算谐波的方法，包括：提供数据处理电路; 在伺服数据处理期间接收从数据源导出的第一数据组; 使用所述第一数据组执行第一谐波计算以产生第一谐波比; 在用户数据处理期间接收从除了前述数据源之外的源得到的第二数据集; 使用所述第二数据组执行二次谐波计算以产生第二谐波比; 以及计算所述第一谐波比与所述第二谐波比的比率。

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）。

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。

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。

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。

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。

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。

公开(公告)号：US08175201B2

公开(公告)日：2012-05-08

申请号：US12663325

申请日：2008-10-27

申请人： George Mathew ,  Yuan Xing Lee ,  Hongwei Song ,  Liu Jingfeng ,  Jongseung Park

发明人： George Mathew ,  Yuan Xing Lee ,  Hongwei Song ,  Liu Jingfeng ,  Jongseung Park

IPC分类号： H03D1/06 ,  H03D11/04 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

CPC分类号： G11B19/041 ,  G11B5/09 ,  G11B20/10009 ,  G11B20/10046 ,  G11B20/10481 ,  G11B2220/2516

摘要： Various embodiments of the present invention provide systems and methods for performing adaptive equalization. For example, various embodiments of the present invention provide methods for adaptive equalization that include providing a data processing system with an equalizer circuit (210) and a target filter circuit (265). The equalizer circuit performs equalization based at least in part on an equalizer coefficient (215). The methods further include generating an error (285) based upon a first output from the equalizer circuit and a second output from the target filter circuit. An inter-symbol interference component (295) is extracted from the error (285) and used to calculate an equalizer gradient (226). Based at least in part on the equalizer gradient (226), the equalizer coefficient (215) is calculated.

摘要翻译： 本发明的各种实施例提供了用于执行自适应均衡的系统和方法。 例如，本发明的各种实施例提供了用于自适应均衡的方法，其包括向数据处理系统提供均衡器电路（210）和目标滤波器电路（265）。 均衡器电路至少部分地基于均衡器系数（215）来执行均衡。 所述方法还包括基于均衡器电路的第一输出和来自目标滤波器电路的第二输出产生误差（285）。 从误差（285）提取符号间干扰分量（295），并用于计算均衡器梯度（226）。 至少部分基于均衡器梯度（226），计算均衡器系数（215）。