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    • 54. 发明申请
    • Adaptive Calibration of Noise Predictive Finite Impulse Response Filter
    • 噪声预测有限脉冲响应滤波器的自适应校准
    • US20130339827A1
    • 2013-12-19
    • US13525182
    • 2012-06-15
    • Yang HanShaohua YangFan ZhangZongwang LiChangyou Xu
    • Yang HanShaohua YangFan ZhangZongwang LiChangyou Xu
    • G06F11/07
    • G11B20/10046H03M13/1111H03M13/2957H03M13/6325H03M13/6343H04L25/03171H04L25/03318H04L25/067
    • Various embodiments of the present inventions are related to adaptive calibration of NPFIR filters in a data detector. For example, an apparatus for calibrating a noise predictive filter is disclosed, including a data detector operable to generate detected values for data sectors and having an embedded noise predictive finite impulse response filter. The apparatus also includes a comparator operable to determine whether a quality metric for a current one of the data sectors meets a noise threshold. The apparatus also includes a filter calibration circuit operable to adapt a number of filter coefficients for the noise predictive finite impulse response filter based on the detected values for the data sectors, and to omit the detected values for the current one of the data sectors from adaptation for one of the filter coefficients if the quality metric for the current one of the data sectors does not meet the noise threshold.
    • 本发明的各种实施例涉及数据检测器中的NPFIR滤波器的自适应校准。 例如,公开了一种用于校准噪声预测滤波器的装置,包括可操作以产生数据扇区的检测值并具有嵌入式噪声预测有限脉冲响应滤波器的数据检测器。 该装置还包括比较器,可操作以确定当前数据扇区的质量度量是否符合噪声阈值。 该装置还包括滤波器校准电路,其可操作以基于用于数据扇区的检测值来适应用于噪声预测有限脉冲响应滤波器的多个滤波器系数,并且从适配中省去当前数据扇区的检测值 对于当前一个数据扇区的质量度量不满足噪声阈值的滤波器系数之一。