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1. 发明申请

US20090161245A1 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：US20090161245A1
公开(公告)日：2009-06-25
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。

2. 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。

3. 发明申请

US20110080211A1 Systems and Methods for Noise Reduced Data Detection 审中-公开
标题翻译：降噪数据检测系统和方法
公开(公告)号：US20110080211A1
公开(公告)日：2011-04-07
申请号：US12992948
申请日：2009-04-17
申请人： Shaohua Yang , Yuan Xing Lee , Richard Rauschmayer , Hongwei Song , Jingfeng Liu , Weijun Tan
发明人： Shaohua Yang , Yuan Xing Lee , Richard Rauschmayer , Hongwei Song , Jingfeng Liu , Weijun Tan
IPC分类号： H03K5/00
CPC分类号： G11B20/24 , G11B20/10037 , G11B20/10194 , G11B20/10527 , G11B20/1833 , G11B20/1879 , G11B2020/1062 , G11B2020/10685 , G11B2020/10694 , G11B2020/10759 , G11B2020/183 , G11B2020/185 , G11B2220/2516 , H03M13/1105 , H03M13/2948 , H03M13/3746 , H03M13/6343 , H04L1/005 , H04L1/0057
摘要： Various embodiments of the present invention provide systems and methods for data processing. For example, some embodiments of the present invention provide noise reduced data processing circuits. Such circuits include a selector circuit, a sample set averaging circuit, and a data detection circuit. The selector circuit provides either a new sample set or an averaged sample set as a sample output based on a select control signal. The sample set averaging circuit receives the new sample set and provides the averaged sample set. The averaged sample set is based upon two or more instances of the new sample set. The data detection circuit receives the sample output, and performs a data detection algorithm on the sample output and provides the select control signal and a data output.
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，本发明的一些实施例提供降噪数据处理电路。这种电路包括选择器电路，采样组平均电路和数据检测电路。选择器电路基于选择控制信号提供新的采样集或平均采样集作为采样输出。样本集平均电路接收新的样本集并提供平均的样本集。平均采样集基于新样本集的两个或多个实例。数据检测电路接收采样输出，对采样输出执行数据检测算法，提供选择控制信号和数据输出。

4. 发明授权

US07948699B2 Systems and methods for equalizer optimization in a storage access retry 有权
标题翻译：存储访问重试中均衡器优化的系统和方法
公开(公告)号：US07948699B2
公开(公告)日：2011-05-24
申请号：US12348236
申请日：2009-01-02
申请人： Jingfeng Liu , Hongwei Song , Richard Rauschmayer , Yuan Xing Lee
发明人： Jingfeng Liu , Hongwei Song , Richard Rauschmayer , Yuan Xing Lee
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10481 , G11B20/18 , G11B2020/183 , G11B2220/2516
摘要： Various embodiments of the present invention provide data processing circuits that include a multiplexer, a memory buffer, a data processing circuit, and a channel setting modification circuit. A first input of the multiplexer receives an input data set and a second input of the multiplexer receives a buffered data set. The multiplexer provides either the input data set or the buffered data set as a multiplexer output based upon a select signal. The memory buffer receives the multiplexer output and provides the buffered data set. Operation of the data processing circuit is at least in part governed by channel settings. The data processing circuit receives the multiplexer output and performs a data detection process. The select signal is asserted to select the buffered data set when the data detection process fails, and is asserted to select the input data set when the data detection process succeeds. The channel setting modification circuit is operable to modify the channel settings when the data detection process fails.
摘要翻译：本发明的各种实施例提供了包括多路复用器，存储器缓冲器，数据处理电路和通道设置修改电路的数据处理电路。多路复用器的第一输入接收输入数据集，多路复用器的第二输入接收缓冲数据集。复用器根据选择信号提供输入数据组或缓冲数据组作为多路复用器输出。存储器缓冲器接收多路复用器输出并提供缓冲数据集。数据处理电路的操作至少部分由通道设置决定。数据处理电路接收复用器输出并执行数据检测处理。当数据检测过程失败时，选择信号被置位以选择缓冲数据集，当数据检测过程成功时，选择信号选择输入数据集。当数据检测处理失败时，通道设置修改电路可操作以修改通道设置。

5. 发明申请

US20100172046A1 Systems and Methods for Equalizer Optimization in a Storage Access Retry 有权
标题翻译：存储访问重试中均衡器优化的系统和方法
公开(公告)号：US20100172046A1
公开(公告)日：2010-07-08
申请号：US12348236
申请日：2009-01-02
申请人： Jingfeng Liu , Hongwei Song , Richard Rauschmayer , Yuan Xing Lee
发明人： Jingfeng Liu , Hongwei Song , Richard Rauschmayer , Yuan Xing Lee
IPC分类号： G11B20/10
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10481 , G11B20/18 , G11B2020/183 , G11B2220/2516
摘要： Various embodiments of the present invention provide data processing circuits that include a multiplexer, a memory buffer, a data processing circuit, and a channel setting modification circuit. A first input of the multiplexer receives an input data set and a second input of the multiplexer receives a buffered data set. The multiplexer provides either the input data set or the buffered data set as a multiplexer output based upon a select signal. The memory buffer receives the multiplexer output and provides the buffered data set. Operation of the data processing circuit is at least in part governed by channel settings. The data processing circuit receives the multiplexer output and performs a data detection process. The select signal is asserted to select the buffered data set when the data detection process fails, and is asserted to select the input data set when the data detection process succeeds. The channel setting modification circuit is operable to modify the channel settings when the data detection process fails.
摘要翻译：本发明的各种实施例提供了包括多路复用器，存储器缓冲器，数据处理电路和通道设置修改电路的数据处理电路。多路复用器的第一输入接收输入数据集，多路复用器的第二输入接收缓冲数据集。复用器根据选择信号提供输入数据组或缓冲数据组作为多路复用器输出。存储器缓冲器接收多路复用器输出并提供缓冲数据集。数据处理电路的操作至少部分由通道设置决定。数据处理电路接收复用器输出并执行数据检测处理。当数据检测过程失败时，选择信号被置位以选择缓冲数据集，当数据检测过程成功时，选择信号选择输入数据集。当数据检测处理失败时，通道设置修改电路可操作以修改通道设置。

6. 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。

7. 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。

8. 发明申请

US20110249361A1 FLY-HEIGHT CONTROL USING ASYNCHRONOUS SAMPLING 有权
标题翻译：使用异步采样的飞行高度控制
公开(公告)号：US20110249361A1
公开(公告)日：2011-10-13
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： G11B21/02
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

US20100182718A1 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：US20100182718A1
公开(公告)日：2010-07-22
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）。

10. 发明申请

US20100157458A1 Systems and Methods for Dibit Correction 有权
标题翻译： Dibit校正系统与方法
公开(公告)号：US20100157458A1
公开(公告)日：2010-06-24
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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