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91. 发明授权

US07924523B2 Frequency domain approach for efficient computation of fixed-point equalization targets 有权
标题翻译：用于有效计算定点均衡目标的频域方法
公开(公告)号：US07924523B2
公开(公告)日：2011-04-12
申请号：US12273265
申请日：2008-11-18
申请人： George Mathew , Yuan Xing Lee , Hongwei Song , Richard Rauschmayer
发明人： George Mathew , Yuan Xing Lee , Hongwei Song , Richard Rauschmayer
IPC分类号： G11B5/035
CPC分类号： G11B20/10212 , G11B20/10046 , G11B20/10194 , G11B20/24 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for equalizing an input signal. For example, various embodiments of the present invention provide a method for performing equalization in a storage device. Such methods include providing an equalizer circuit that is governed by a target value, and a filter circuit that is governed by a filter coefficient. An initial value is provided to the equalizer circuit as the target value, and an overall target based at least in part on the initial value and the filter coefficient is calculated. An updated value is calculated based on the overall target, and the updated value is provided to the equalizer circuit as the target value.
摘要翻译：本发明的各种实施例提供了用于均衡输入信号的系统和方法。例如，本发明的各种实施例提供了一种用于在存储设备中执行均衡的方法。这样的方法包括提供由目标值控制的均衡器电路和由滤波器系数控制的滤波器电路。将初始值作为目标值提供给均衡器电路，并且至少部分地基于初始值和滤波器系数来计算总体目标。基于总体目标计算更新的值，并且将更新的值作为目标值提供给均衡器电路。

92. 发明授权

US07924518B2 Systems and methods for adaptive write pre-compensation 有权
标题翻译：自适应写预补偿的系统和方法
公开(公告)号：US07924518B2
公开(公告)日：2011-04-12
申请号：US12199325
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： G11B5/02
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 methods for modifying magnetic information transfer. The methods include retrieving magnetically represented data from a storage medium, and converting the magnetically represented data to a series of data samples. A preceding pattern and a transition status is identified in the series of data samples, and an equalized channel response is computed based on an estimated NLTS value. An error value is computed that corresponds to a difference between the estimated NLTS value and an actual NLTS value, and a pre-compensation value is computed based at least in part on the error 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了用于修改磁信息传送的方法。所述方法包括从存储介质检索磁性表示的数据，并将磁性表示的数据转换成一系列数据样本。在一系列数据样本中识别出先前的模式和转变状态，并且基于估计的NLTS值来计算均衡的信道响应。计算对应于估计的NLTS值和实际NLTS值之间的差异的误差值，并且至少部分地基于误差值计算预补偿值。

93. 发明申请

US20110063747A1 Systems and Methods for Timing and Gain Acquisition 有权
标题翻译：系统和方法用于计时和增益采集
公开(公告)号：US20110063747A1
公开(公告)日：2011-03-17
申请号：US12558928
申请日：2009-09-14
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： G11B20/10009 , G11B20/10027 , G11B20/10222 , G11B20/10435 , G11B20/1049 , G11B2220/2516
摘要： Various embodiments of the present invention provide systems and methods for acquiring timing and/or gain information. For example, various embodiments of the present invention provide data processing circuits that include a sample splitting circuit, a first averaging circuit, a second averaging circuit and a parameter calculation circuit. The sample splitting circuit receives a data input that includes a series of samples that repeat periodically over at least a first phase and a second phase. The sample splitting circuit divides the series of samples into at least a first sub-stream corresponding to the first phase and a second sub-stream corresponding to the second phase. The first averaging circuit averages values from the first sub-stream to yield a first average, and the second averaging circuit averages values from the second sub-stream to yield a second average. The parameter calculation circuit calculates a parameter value based at least in part on the first average and the second average.
摘要翻译：本发明的各种实施例提供了用于获取定时和/或增益信息的系统和方法。例如，本发明的各种实施例提供了包括采样分离电路，第一平均电路，第二平均电路和参数计算电路的数据处理电路。采样分离电路接收包括在至少第一阶段和第二阶段周期性地重复的一系列样本的数据输入。样本分割电路将该系列样本划分成对应于第一相的至少第一子流和对应于第二相的第二子流。第一平均电路平均来自第一子流的值以产生第一平均值，并且第二平均电路平均来自第二子流的值以产生第二平均值。参数计算电路至少部分地基于第一平均值和第二平均值来计算参数值。

94. 发明申请

US20110043938A1 Systems and Methods for Fly-Height Control Using Servo Data 有权
标题翻译：使用伺服数据进行飞行高度控制的系统和方法
公开(公告)号：US20110043938A1
公开(公告)日：2011-02-24
申请号：US12663355
申请日：2008-10-27
申请人： George Mathew , Yuan Xing Lee , Hongwei Song , Jeffrey P. Grundvig , Viswanath Annampedu
发明人： George Mathew , Yuan Xing Lee , Hongwei Song , Jeffrey P. Grundvig , Viswanath Annampedu
IPC分类号： G11B27/36 , G11B21/02
CPC分类号： G11B5/6029 , G11B5/59688
摘要： Various embodiments of the present invention provide systems and methods for determining changes in fly-height. For example, various embodiments of the present invention provide storage devices that include a storage medium having servo data thereon. A read/write head assembly is disposed in relation to the storage medium. A servo based fly-height adjustment circuit receives the servo data via the read/write head assembly, and calculates a first harmonics ratio based on the received data and compares the first harmonics ratio with a second harmonics ratio to determine an error in the distance between the read/write head assembly and the storage medium.
摘要翻译：本发明的各种实施例提供用于确定飞行高度变化的系统和方法。例如，本发明的各种实施例提供了包括其上具有伺服数据的存储介质的存储设备。相对于存储介质设置读/写头组件。基于伺服的飞高调节电路经由读/写头组件接收伺服数据，并且基于接收到的数据计算第一谐波比，并将第一谐波比与二次谐波比进行比较，以确定第二谐波比之间的距离误差读/写头组件和存储介质。

95. 发明授权

US07679853B2 Detection of signal disturbance in a partial response channel 有权
标题翻译：检测部分响应信道中的信号干扰
公开(公告)号：US07679853B2
公开(公告)日：2010-03-16
申请号：US11319319
申请日：2005-12-28
申请人： Hongwei Song , Weijun Tan
发明人： Hongwei Song , Weijun Tan
IPC分类号： G11B5/02
CPC分类号： G11B20/18 , G11B5/6076
摘要： In one embodiment, irregular electronic disturbance signals in a partial-response read channel are detected by a disturbance detector using state metrics generated by maximum-likelihood sequence detector. For example, a thermal asperity (TA) detector detects the occurrence of TAs in the read channel of perpendicularly recorded magnetic media by using the state metrics generated by a Viterbi detector. Changes in state metrics (e.g., magnitudes of the branch metrics of the trellis diagram) used by the Viterbi detector are tracked. If the magnitude of the rise of the path metric increases above a set threshold, then a TA is detected. Alternatively, or additionally, the rate of change of the magnitude of the path metrics is tracked. If the rate of change within a set time window is above a specified threshold, then a TA is detected.
摘要翻译：在一个实施例中，部分响应读通道中的不规则电子干扰信号由使用由最大似然序列检测器产生的状态度量的扰动检测器检测。例如，热绝缘（TA）检测器通过使用维特比检测器产生的状态度量来检测垂直记录的磁介质的读通道中的TA的出现。跟踪由维特比检测器使用的状态度量（例如格子图的分支度量的大小）的变化。如果路径度量的上升幅度增加到设定的阈值以上，则检测TA。或者或另外，跟踪路径度量的幅度的变化率。如果设定的时间窗内的变化率高于规定的阈值，则检测出TA。

96. 发明申请

US20090154003A1 Systems and Methods for Using an On-the-fly CBD Estimate to Adjust Fly-Height 有权
标题翻译：使用实时CBD估计来调整飞行高度的系统和方法
公开(公告)号：US20090154003A1
公开(公告)日：2009-06-18
申请号：US12254737
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 using channel bit density estimates to adjust fly-height. For example, various embodiments of the present invention provide methods for adaptively adjusting fly-height. Such methods include providing a storage medium that includes information corresponding to a process data set, and a read/write head assembly that is disposed a variable distance from the storage medium. The process data set is accessed from the storage medium. A first channel bit density estimate is adaptively calculated based at least in part on the process data set and a second channel bit density estimate that was previously calculated. The variable distance is modified based at least in part on the first channel bit density estimate. A third channel bit density is adaptively calculated based at least in part on the process data set and a fourth channel bit density estimate that was previously calculated. The variable distance is modified based at least in part on the third channel bit density estimate.
摘要翻译：本发明的各种实施例提供了使用信道比特密度估计来调整飞行高度的系统和方法。例如，本发明的各种实施例提供了用于自适应地调整飞行高度的方法。这样的方法包括提供包括对应于过程数据集的信息的存储介质以及与存储介质可变距离设置的读/写头组件。从存储介质访问过程数据集。至少部分地基于过程数据集和先前计算的第二信道比特密度估计自适应地计算第一信道比特密度估计。至少部分地基于第一信道比特密度估计修改可变距离。至少部分地基于过程数据集和先前计算的第四通道位密度估计来自适应地计算第三通道位密度。至少部分地基于第三通道位密度估计修改可变距离。

97. 发明授权

US09305582B2 Systems and methods for fly-height control using servo data 有权
标题翻译：使用伺服数据进行飞行高度控制的系统和方法
公开(公告)号：US09305582B2
公开(公告)日：2016-04-05
申请号：US12663355
申请日：2008-10-27
申请人： George Mathew , Yuan Xing Lee , Hongwei Song , Jeffrey P. Grundvig , Viswanath Annampedu
发明人： George Mathew , Yuan Xing Lee , Hongwei Song , Jeffrey P. Grundvig , Viswanath Annampedu
IPC分类号： G11B21/02 , G11B27/36 , G11B5/60 , G11B5/596
CPC分类号： G11B5/6029 , G11B5/59688
摘要： Various embodiments of the present invention provide systems and methods for determining changes in fly-height. For example, various embodiments of the present invention provide storage devices that include a storage medium having servo data thereon. A read/write head assembly is disposed in relation to the storage medium. A servo based fly-height adjustment circuit receives the servo data via the read/write head assembly, and calculates a first harmonics ratio based on the received data and compares the first harmonics ratio with a second harmonics ratio to determine an error in the distance between the read/write head assembly and the storage medium.
摘要翻译：本发明的各种实施例提供用于确定飞行高度变化的系统和方法。例如，本发明的各种实施例提供了包括其上具有伺服数据的存储介质的存储设备。相对于存储介质设置读/写头组件。基于伺服的飞高调节电路经由读/写头组件接收伺服数据，并且基于接收到的数据计算第一谐波比，并将第一谐波比与二次谐波比进行比较，以确定第二谐波比之间的距离误差读/写头组件和存储介质。

98. 发明授权

US09048879B1 Error correction system using an iterative product code 有权
标题翻译：纠错系统使用迭代产品代码
公开(公告)号：US09048879B1
公开(公告)日：2015-06-02
申请号：US13586710
申请日：2012-08-15
申请人： Shaohua Yang , Zining Wu , Gregory Burd , Xueshi Yang , Hongwei Song , Nedeljko Varnica
发明人： Shaohua Yang , Zining Wu , Gregory Burd , Xueshi Yang , Hongwei Song , Nedeljko Varnica
IPC分类号： H03M13/29 , H04L1/00
CPC分类号： H03M13/2945 , H03M13/098 , H03M13/1102 , H03M13/1515 , H03M13/23 , H03M13/2909 , H03M13/2957 , H03M13/3746 , H04L1/0065
摘要： An error correction system includes an iterative code that employs an interleaved component code and an embedded parity component code. In some embodiments, on the transmission side, input signals received at an input node are encoded based on the interleaved code, which encodes an interleaved version of the input data to produce a first set of codewords. At least a portion of the first set of codewords preferably is divided into a plurality of symbols which are encoded based on the embedded parity code to provide encoded data. Similarly, in some embodiments, on the receiving side, received data are detected to produce detected information and soft outputs. The detected information is decoded based on the embedded parity code to obtain decoded information. The decoded information preferably is used, together with other soft information, by an interleaved decoder to generate reliability metrics for biasing a subsequent decoding iteration.
摘要翻译：纠错系统包括使用交织分量代码和嵌入奇偶校验分量代码的迭代代码。在一些实施例中，在传输侧，在输入节点处接收的输入信号基于交织的代码进行编码，该代码编码输入数据的交错版本以产生第一组码字。第一组码字的至少一部分优选地被划分为多个符号，这些符号基于嵌入的奇偶校验码被编码以提供编码数据。类似地，在一些实施例中，在接收侧，检测所接收的数据以产生检测到的信息和软输出。检测到的信息根据嵌入的奇偶校验码进行解码以获得解码的信息。解码的信息优选地与其他软信息一起被交织的解码器使用以产生用于偏置随后的解码迭代的可靠性度量。

99. 发明授权

US08743936B2 Systems and methods for determining noise components in a signal set 有权
标题翻译：用于确定信号组中噪声分量的系统和方法
公开(公告)号：US08743936B2
公开(公告)日：2014-06-03
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 , H04Q1/20
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。

100. 发明授权

US08605381B2 Systems and methods for phase compensated harmonic sensing in fly height control 有权
标题翻译：飞行高度控制中相位补偿谐波感测的系统和方法
公开(公告)号：US08605381B2
公开(公告)日：2013-12-10
申请号：US12875734
申请日：2010-09-03
申请人： George Mathew , Pradeep Padukone , Hongwei Song , Suharli Tedja
发明人： George Mathew , Pradeep Padukone , Hongwei Song , Suharli Tedja
IPC分类号： G11B21/02 , G11B27/36
CPC分类号： G11B5/6029
摘要： Various embodiments of the present invention provide systems and methods for phase compensated harmonic sensing. For example, a circuit for harmonics calculation is disclosed that includes a phase difference estimation circuit and a phase offset compensation circuit. The harmonic calculation circuit is operable to calculate a first harmonic based on a periodic data pattern and a second harmonic based on the periodic data pattern. The phase difference estimation circuit operable to calculate a phase difference between the first harmonic and the second harmonic. The phase offset compensation circuit operable to align the second harmonic with the first harmonic to yield an aligned harmonic.
摘要翻译：本发明的各种实施例提供了用于相位补偿谐波感测的系统和方法。例如，公开了一种用于谐波计算的电路，其包括相位差估计电路和相位偏移补偿电路。谐波计算电路可操作以基于周期性数据模式和基于周期性数据模式的二次谐波计算第一谐波。所述相位差估计电路可操作以计算所述一次谐波和所述第二谐波之间的相位差。相位偏移补偿电路可操作以将二次谐波与第一谐波对准以产生对准的谐波。

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