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    • 1. 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。
    • 4. 发明授权
    • Systems and methods for idle clock insertion based power control
    • 基于空闲时钟插入的功率控制系统和方法
    • US08972761B2
    • 2015-03-03
    • US13364217
    • 2012-02-01
    • Shaohua YangChangyou XuFan Zhang
    • Shaohua YangChangyou XuFan Zhang
    • G06F1/32
    • G06F1/324G06F1/3268G11B19/02G11B19/209Y02D10/126Y02D10/154
    • The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for power governance in a data processing system. In one particular case, a system is disclosed that includes a first data processing circuit operable to apply a data detection algorithm to a data input synchronous to a first clock, and a second data processing circuit operable to apply a subsequent data processing algorithm to an output derived from the first data processing circuit synchronous to a second clock, and an idle time enforcement circuit operable to modify an average frequency of at least one of the first clock and the second clock.
    • 本发明涉及用于数据处理的系统和方法,更具体地涉及用于数据处理系统中的功率治理的系统和方法。 在一个具体情况下,公开了一种系统,其包括可操作以将数据检测算法应用于与第一时钟同步的数据输入的第一数据处理电路,以及可操作以将后续数据处理算法应用于输出的第二数据处理电路 来自与第二时钟同步的第一数据处理电路,以及空闲时间执行电路,其可操作以修改第一时钟和第二时钟中的至少一个的平均频率。
    • 6. 发明授权
    • 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
    • US08719682B2
    • 2014-05-06
    • 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。
    • 7. 发明授权
    • Systems and methods for efficient data channel testing
    • 高效数据通道测试的系统和方法
    • US08799340B2
    • 2014-08-05
    • US13280023
    • 2011-10-24
    • Changyou XuShaohua YangKapil Gaba
    • Changyou XuShaohua YangKapil Gaba
    • G06F1/02G11B27/36
    • G06F7/582
    • Various embodiments of the present invention provide systems and methods for data processing. For example, a data processing system is disclosed that includes: a data detector circuit, a pseudo-random sequence generator circuit, a decoder circuit, and a pseudo-random sequence reconstitution circuit. The data detector circuit is operable to apply a data detection algorithm to a first data set to yield a detected output. The pseudo-random sequence generator circuit is operable to generate an interim data sequence and to generate a second data set based upon a combination of the detected output and the interim data sequence. The decoder circuit is operable to apply a data decode algorithm to a derivative of the second data set to yield a third data set.
    • 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,公开了一种数据处理系统,其包括:数据检测器电路,伪随机序列发生器电路,解码器电路和伪随机序列重构电路。 数据检测器电路可操作以将数据检测算法应用于第一数据集以产生检测到的输出。 伪随机序列发生器电路可操作以产生临时数据序列,并且基于检测到的输出和中间数据序列的组合来生成第二数据集。 解码器电路可操作以将数据解码算法应用于第二数据集的导数以产生第三数据集。
    • 8. 发明授权
    • Adjusting soft-output values in turbo equalization schemes to break trapping sets
    • 调整turbo均衡方案中的软输出值,以打破陷阱集
    • US08700976B2
    • 2014-04-15
    • US12540078
    • 2009-08-12
    • Kiran GunnamShaohua YangChangyou Xu
    • Kiran GunnamShaohua YangChangyou Xu
    • G06F11/00
    • H03M13/1111H03M13/09H03M13/1142H03M13/3707H03M13/3738H03M13/3753H03M13/451
    • In one embodiment, a turbo equalizer has an LDPC decoder, a channel detector, and one or more adjustment blocks for recovering an LDPC codeword from a set of input samples. The decoder attempts to recover the codeword from an initial set of channel soft-output values and generates a set of extrinsic soft-output values, each corresponding to a bit of the codeword. If the decoder converges on a trapping set, then the channel detector performs detection on the set of input samples to generate a set of updated channel soft-output values, using the extrinsic soft-output values to improve the detection. The one or more adjustment blocks adjust at least one of (i) the extrinsic soft-output values before the channel detection and (ii) the updated channel soft-output values. Subsequent decoding is then performed on the updated and possibly-adjusted channel soft-output values to attempt to recover the codeword.
    • 在一个实施例中,turbo均衡器具有LDPC解码器,信道检测器和用于从一组输入采样中恢复LDPC码字的一个或多个调整块。 解码器尝试从初始的信道软输出值集合中恢复码字,并产生一组非本征软输出值,每个对应于码字的位。 如果解码器收敛于捕获集合,则信道检测器对输入样本集执行检测,以使用外部软输出值来生成一组更新的信道软输出值,以改善检测。 一个或多个调整块调整(i)信道检测之前的非本征软输出值和(ii)更新的信道软输出值中的至少一个。 然后对更新的和可能调整的信道软输出值执行随后的解码,以尝试恢复码字。
    • 9. 发明授权
    • Systems and methods for data pre-coding calibration
    • 用于数据预编码校准的系统和方法
    • US08446683B2
    • 2013-05-21
    • US13031818
    • 2011-02-22
    • Changyou XuShaohua YangHaitoa XiaKapil Gaba
    • Changyou XuShaohua YangHaitoa XiaKapil Gaba
    • G11B5/00
    • G11B20/10083G11B20/10296G11B20/1833G11B2020/185G11B2220/2516G11B2220/415
    • Various embodiments of the present invention provide systems and methods for selecting between pre-coding and non-pre-coding. As an example, a data processing circuit is disclosed that includes: a first data detector circuit, a second data detector circuit, a first comparator circuit, a second comparator circuit, and a pre-code selection circuit. The first data detector circuit is selectably configurable to operate in a pre-coded state, and operable to apply a data detection algorithm on a data input to yield a first detected output. The second data detector circuit operable to apply the data detection algorithm to the data input to yield a second detected output without compensating for pre-coding. The first comparator circuit operable to compare the first detected output against a known input to yield a first comparison value, and the second comparator circuit operable to compare the second detected output against the known input to yield a second comparison value. The pre-code selection circuit is operable to determine a selectable configuration of the first data detector circuit based at least in part on the first comparison value and the second comparison value.
    • 本发明的各种实施例提供了用于在预编码和非预编码之间进行选择的系统和方法。 作为示例,公开了一种数据处理电路,其包括:第一数据检测器电路,第二数据检测器电路,第一比较器电路,第二比较器电路和预代码选择电路。 第一数据检测器电路可选择地被配置为以预编码状态操作,并且可操作以将数据检测算法应用于数据输入以产生第一检测输出。 第二数据检测器电路可操作以将数据检测算法应用于数据输入以产生第二检测输出而不补偿预编码。 第一比较器电路可操作以将第一检测输出与已知输入进行比较以产生第一比较值,并且第二比较器电路可操作以将第二检测输出与已知输入进行比较以产生第二比较值。 预编码选择电路可操作以至少部分地基于第一比较值和第二比较值来确定第一数据检测器电路的可选配置。
    • 10. 发明申请
    • Systems and Methods for Monitoring Out of Order Data Decoding
    • 监控异步数据解码的系统和方法
    • US20110161633A1
    • 2011-06-30
    • US12651254
    • 2009-12-31
    • Changyou XuShaohua YangKapil Gaba
    • Changyou XuShaohua YangKapil Gaba
    • G06F9/30G06F12/00
    • G06F11/3093G06F11/3034G06F11/3055G06F11/3068
    • Various embodiments of the present invention provide systems and methods for monitoring out of order data decoding. For example, a method for monitoring out of order data processing is provided that includes receiving a plurality of data sets that is associated with a plurality of identifiers with each of the plurality of identifiers indicates a respective one of the plurality of data sets; storing each of the plurality of identifiers in a FIFO memory in an order that the corresponding data sets of the plurality of data sets was received; processing the plurality of data sets such that at least one of the plurality of data sets is provided as an output data set; accessing the next available identifier from the FIFO memory; and asserting an out of order signal when the next available identifier is not the same as the identifier associated with the output data set.
    • 本发明的各种实施例提供用于监视异步数据解码的系统和方法。 例如,提供了一种用于监视不合格数据处理的方法,包括接收与多个标识符相关联的多个数据集,所述多个标识符中的每一个标识符指示所述多个数据集中的相应一个; 将多个标识符中的每一个按照接收到多个数据集的相应数据集的顺序存储在FIFO存储器中; 处理所述多个数据集,使得所述多个数据集中的至少一个被提供为输出数据集; 从FIFO存储器访问下一个可用标识符; 并且当下一个可用标识符与与输出数据集相关联的标识符不相同时,断言无序信号。