LDPC decoder with fractional unsatisfied check quality metric
    4.
    发明授权
    LDPC decoder with fractional unsatisfied check quality metric 有权
    具有分数不满足检验质量度量的LDPC解码器

    公开(公告)号:US08930788B2

    公开(公告)日:2015-01-06

    申请号:US13602463

    申请日:2012-09-04

    IPC分类号: H03M13/00

    摘要: An apparatus includes a low density parity check decoder operable to iteratively generate messages between a plurality of check nodes and variable nodes, and to calculate a fractional quality metric for a data block as it is decoded in the low density parity check decoder based at least in part on perceived values of data in the variable nodes. The fractional unsatisfied check quality metric is a probabilistic determination of a number of unsatisfied parity checks in the low density parity check decoder.

    摘要翻译: 一种装置包括低密度奇偶校验解码器,其可操作以在多个校验节点和可变节点之间迭代地生成消息,并且在低密度奇偶校验解码器中解码时计算数据块的分数质量度量,至少基于 部分变量节点中数据的感知值。 分数不满足的检查质量度量是低密度奇偶校验解码器中的不满足奇偶校验的数量的概率确定。

    Systems and methods for track width determination
    5.
    发明授权
    Systems and methods for track width determination 有权
    轨道宽度确定的系统和方法

    公开(公告)号:US08854752B2

    公开(公告)日:2014-10-07

    申请号:US13100063

    申请日:2011-05-03

    申请人: Ming Jin Haitao Xia

    发明人: Ming Jin Haitao Xia

    IPC分类号: G11B27/36 G11B19/04 G11B20/22

    摘要: Various embodiments of the present invention provide systems and methods for read sensor characterization. As an example, a data storage device is disclosed that includes a storage medium, a read/write head assembly disposed in relation to the storage medium, and a track width setting circuit. The track width setting circuit is operable to: write data to at least a first track and a second track on the storage medium, read data from the second track, determine an estimated track offset where interference from the data written to the first track is insubstantial, and modify at least the second track width based at least in part on the estimated track offset. The first track is a first track width and the second track is a second track width.

    摘要翻译: 本发明的各种实施例提供用于读取传感器表征的系统和方法。 作为示例,公开了包括存储介质,相对于存储介质设置的读/写头组件和轨道宽度设置电路的数据存储设备。 轨道宽度设置电路可操作用于:将数据写入存储介质上的至少第一磁道和第二磁道,从第二磁道读取数据,确定估计的磁道偏移量,其中写入第一磁道的数据的干扰是非实质的 并且至少部分地基于估计的轨道偏移来修改至少第二轨道宽度。 第一轨道是第一轨道宽度,第二轨道是第二轨道宽度。

    Systems and Methods for Parameter Modification During Data Processing Retry
    9.
    发明申请
    Systems and Methods for Parameter Modification During Data Processing Retry 有权
    数据处理重试期间参数修改的系统和方法

    公开(公告)号:US20130208376A1

    公开(公告)日:2013-08-15

    申请号:US13372600

    申请日:2012-02-14

    IPC分类号: G11B5/09

    CPC分类号: G11B5/09 G11B20/10009

    摘要: Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing system is discussed that includes: a buffer circuit, an equalizer circuit, a data processing circuit, and a retry determination circuit. The buffer is operable to store digital samples as a buffered output, and the equalizer circuit is operable to equalize the buffered output using a first equalization target to yield a first equalized output, and to yield a second equalized output using a second equalization target. The retry determination circuit is operable to select the second equalization target based at least in part on an occurrence of an error.

    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,讨论了包括缓冲电路,均衡器电路,数据处理电路和重试确定电路的数据处理系统。 缓冲器可操作以将数字样本存储为缓冲输出,并且均衡器电路可操作以使用第一均衡目标来均衡缓冲输出,以产生第一均衡输出,并且使用第二均衡目标产生第二均衡输出。 重试确定电路可操作以至少部分地基于错误的发生来选择第二均衡目标。

    Systems and Methods for Adaptive Gain Control
    10.
    发明申请
    Systems and Methods for Adaptive Gain Control 有权
    自适应增益控制的系统和方法

    公开(公告)号:US20130176640A1

    公开(公告)日:2013-07-11

    申请号:US13346556

    申请日:2012-01-09

    申请人: Haitao Xia Yu Liao

    发明人: Haitao Xia Yu Liao

    IPC分类号: G11B5/09 G11B5/02 H03M1/12

    CPC分类号: H03M1/185 G11B20/10009

    摘要: Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing system is discussed that includes: an analog to digital converter circuit, a data detector circuit, a filter circuit, an error generation circuit, and a target parameter adaptation circuit. The analog to digital converter circuit converts an analog input into corresponding digital samples. The data detector circuit applies a data detection algorithm to a data set derived from the digital samples to yield a detected output. The filter circuit convolves the detected output with a target parameter to yield a target output. The error generation circuit calculates an error value based on the digital samples and the target output. The target parameter adaptation circuit updates the target parameter 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数据处理的系统和方法。 例如,讨论了一种数据处理系统,其包括:模数转换器电路,数据检测器电路,滤波器电路,误差产生电路和目标参数自适应电路。 模数转换器电路将模拟输入转换为相应的数字采样。 数据检测器电路将数据检测算法应用于从数字样本导出的数据集,以产生检测到的输出。 滤波器电路将检测到的输出与目标参数进行卷积以产生目标输出。 误差产生电路根据数字采样和目标输出来计算误差值。 目标参数自适应电路至少部分地基于误差值更新目标参数。