Systems and methods for adaptive equalization in recording channels
    1.
    发明授权
    Systems and methods for adaptive equalization in recording channels 有权
    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

    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)。

    Systems and Methods for Adaptive Equalization in Recording Channels
    2.
    发明申请
    Systems and Methods for Adaptive Equalization in Recording Channels 有权
    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

    IPC分类号: G06F11/07

    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)。

    AGC loop with weighted zero forcing and LMS error sources and methods for using such
    3.
    发明授权
    AGC loop with weighted zero forcing and LMS error sources and methods for using such 有权
    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

    IPC分类号: G11B5/09

    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。

    AGC Loop with Weighted Zero Forcing and LMS Error Sources and Methods for Using Such
    4.
    发明申请
    AGC Loop with Weighted Zero Forcing and LMS Error Sources and Methods for Using Such 有权
    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

    IPC分类号: G11B5/00 H03G3/30

    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。

    Systems and methods for inter-track interference compensation
    5.
    发明授权
    Systems and methods for inter-track interference compensation 有权
    轨道间干扰补偿的系统和方法

    公开(公告)号:US08804260B2

    公开(公告)日:2014-08-12

    申请号:US13186174

    申请日:2011-07-19

    IPC分类号: G11B5/09

    摘要: Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is discussed that includes: a data buffer, an inter-track interference response circuit, and an inter-track interference signal estimator circuit. The data buffer is operable to store a previous track data set. The inter-track interference response circuit is operable to estimate an inter-track interference response from the previous track data set based at least in part on the previous track data set and a current track data set. The inter-track interference signal estimator circuit is operable to calculate an inter-track interference from the previous track data set based at least in part on the previous track data set and the inter-track interference response from the previous track data set.

    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。 作为示例,讨论了包括数据缓冲器,轨道间干扰响应电路和轨道间干扰信号估计器电路的数据处理电路。 数据缓冲器可操作以存储先前的轨迹数据集。 轨道间干扰响应电路可用于至少部分地基于先前的轨道数据集和当前轨道数据集来估计来自先前轨道数据集的轨道间干扰响应。 轨道间干扰信号估计器电路可用于至少部分地基于先前的轨道数据集和来自前一轨道数据集的轨道间干扰响应来计算来自先前轨道数据集的轨道间干扰。

    Systems and Methods for Inter-track Interference Compensation
    6.
    发明申请
    Systems and Methods for Inter-track Interference Compensation 有权
    轨道间干扰补偿的系统和方法

    公开(公告)号:US20120063022A1

    公开(公告)日:2012-03-15

    申请号:US13186174

    申请日:2011-07-19

    IPC分类号: G11B5/09

    摘要: Various embodiments of the present invention provide systems and methods for data processing. As an example, a data processing circuit is discussed that includes: a data buffer, an inter-track interference response circuit, and an inter-track interference signal estimator circuit. The data buffer is operable to store a previous track data set. The inter-track interference response circuit is operable to estimate an inter-track interference response from the previous track data set based at least in part on the previous track data set and a current track data set. The inter-track interference signal estimator circuit is operable to calculate an inter-track interference from the previous track data set based at least in part on the previous track data set and the inter-track interference response from the previous track data set.

    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。 作为示例,讨论了包括数据缓冲器,轨道间干扰响应电路和轨道间干扰信号估计器电路的数据处理电路。 数据缓冲器可操作以存储先前的轨迹数据集。 轨道间干扰响应电路可用于至少部分地基于先前的轨道数据集和当前轨道数据集来估计来自先前轨道数据集的轨道间干扰响应。 轨道间干扰信号估计器电路可用于至少部分地基于先前的轨道数据集和来自前一轨道数据集的轨道间干扰响应来计算来自先前轨道数据集的轨道间干扰。