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1. 发明授权

US08175201B2 Systems and methods for adaptive equalization in recording channels 有权
标题翻译：记录通道自适应均衡的系统和方法
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）。

2. 发明申请

US20100287420A1 Systems and Methods for Adaptive Equalization in Recording Channels 有权
标题翻译：记录通道自适应均衡的系统和方法
公开(公告)号：US20100287420A1
公开(公告)日：2010-11-11
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： G06F11/07
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）。至少部分地基于均衡器梯度（226），计算均衡器系数（215）。

3. 发明授权

US07872823B2 AGC loop with weighted zero forcing and LMS error sources and methods for using such 有权
标题翻译：具有加权零强制和LMS误差源的AGC环路及其使用方法
公开(公告)号：US07872823B2
公开(公告)日：2011-01-18
申请号：US12352540
申请日：2009-01-12
申请人： Jingfeng Liu , Hongwei Song , Jongseung Park , George Mathew , Yuan Xing Lee
发明人： Jingfeng Liu , Hongwei Song , Jongseung Park , George Mathew , Yuan Xing Lee
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10027 , G11B20/10046 , H03G3/30 , H03M1/185
摘要： Various embodiments of the present invention provide systems and methods for gain control. For example, some embodiments of the present invention provide variable gain control circuits. Such circuits include a zero forcing loop generating a zero forcing feedback and a least mean square loop generating a least mean square feedback. An error quantization circuit generates a hybrid feedback based upon a threshold condition using the zero forcing feedback and the least mean square feedback. A variable gain amplifier is at least in part controlled by a derivative of the hybrid feedback.
摘要翻译：本发明的各种实施例提供用于增益控制的系统和方法。例如，本发明的一些实施例提供可变增益控制电路。这种电路包括产生零强制反馈的零强制环路和产生最小均方反馈的最小均方环路。误差量化电路使用零强制反馈和最小均方反馈基于阈值条件产生混合反馈。可变增益放大器至少部分地由混合反馈的导数来控制。

4. 发明申请

US20100177419A1 AGC Loop with Weighted Zero Forcing and LMS Error Sources and Methods for Using Such 有权
标题翻译：具有加权零强制和LMS误差源的AGC环路及其使用方法
公开(公告)号：US20100177419A1
公开(公告)日：2010-07-15
申请号：US12352540
申请日：2009-01-12
申请人： Jingfeng Liu , Hongwei Song , Jongseung Park , George Mathew , Yuan Xing Lee
发明人： Jingfeng Liu , Hongwei Song , Jongseung Park , George Mathew , Yuan Xing Lee
IPC分类号： G11B5/00 , H03G3/30
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10027 , G11B20/10046 , H03G3/30 , H03M1/185
摘要： Various embodiments of the present invention provide systems and methods for gain control. For example, some embodiments of the present invention provide variable gain control circuits. Such circuits include a zero forcing loop generating a zero forcing feedback and a least mean square loop generating a least mean square feedback. An error quantization circuit generates a hybrid feedback based upon a threshold condition using the zero forcing feedback and the least mean square feedback. A variable gain amplifier is at least in part controlled by a derivative of the hybrid feedback.
摘要翻译：本发明的各种实施例提供用于增益控制的系统和方法。例如，本发明的一些实施例提供可变增益控制电路。这种电路包括产生零强制反馈的零强制环路和产生最小均方反馈的最小均方环路。误差量化电路使用零强制反馈和最小均方反馈基于阈值条件产生混合反馈。可变增益放大器至少部分地由混合反馈的导数来控制。

5. 发明授权

US08300349B2 Systems and methods for format efficient calibration for servo data based harmonics calculation 失效
标题翻译：基于伺服数据的谐波计算格式有效校准的系统和方法
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。

6. 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）。

7. 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。

8. 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。

9. 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。

10. 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。

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