公开(公告)号：US09147416B2

公开(公告)日：2015-09-29

申请号：US14217833

申请日：2014-03-18

Applicant: LSI Corporation

Inventor： Jeffrey P. Grundvig ,  Richard Rauschmayer ,  Yu Liao ,  Jin Lu ,  Edward J. D'Avignon

IPC: G11B5/48 ,  G11B5/09 ,  G11B5/596 ,  G11B5/39 ,  G11B20/10

CPC classification number: G11B5/4886 ,  G06F17/30424 ,  G11B5/09 ,  G11B5/3958 ,  G11B5/3967 ,  G11B5/3977 ,  G11B5/4866 ,  G11B5/59616 ,  G11B5/59627 ,  G11B5/59644 ,  G11B20/10259

Abstract: Systems, methods, devices, circuits for data processing, and more particularly to systems and methods for processing servo data using two or more sensing heads.

Abstract translation: 用于数据处理的系统，方法，设备，电路，更具体地涉及使用两个或更多个感测头来处理伺服数据的系统和方法。

公开(公告)号：US09019641B2

公开(公告)日：2015-04-28

申请号：US13714233

申请日：2012-12-13

Applicant: LSI Corporation

Inventor： Haotian Zhang ,  Yu Liao ,  Haitao Xia

IPC: G11B5/02 ,  G11B27/32 ,  H04B1/10 ,  G11B5/596

CPC classification number: G11B27/322 ,  G11B5/59616 ,  G11B20/10 ,  G11B27/3072 ,  G11B2220/2508 ,  H04B1/1027

Abstract: The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for detecting patterns in a data stream. In one case, a data processing system is disclosed that includes: a pattern detector circuit operable to generate a pattern value based upon a comparison of a defined pattern to a first portion of a received input; and a comparator circuit operable to compare the pattern value to an adapted threshold, and to selectively assert a pattern found signal based at least in part on the comparison of the pattern value and the adapted threshold, where the adapted threshold is adjusted based at least in part on a noise component of a second portion of the received input.

Abstract translation: 本发明涉及用于数据处理的系统和方法，更具体地涉及用于检测数据流中的模式的系统和方法。 在一种情况下，公开了一种数据处理系统，其包括：模式检测器电路，可操作以基于定义的模式与接收到的输入的第一部分的比较来生成模式值; 以及比较器电路，其可操作以将所述模式值与适应的阈值进行比较，并且至少部分地基于所述模式值与所述适应阈值的比较来选择性地断言模式发现信号，其中所述适应阈值至少基于 部分是接收输入的第二部分的噪声分量。

公开(公告)号：US08917470B2

公开(公告)日：2014-12-23

申请号：US13798566

申请日：2013-03-13

Applicant: LSI Corporation

Inventor： Yu Liao ,  Haitao Xia

IPC: G11B5/035 ,  G11B20/10

CPC classification number: G11B20/10046

Abstract: A method for detecting a data sequence includes generating a sample stream, which is a time-sequenced digital signal associated with samples of an analog signal. The sample stream is input to n equalization filter banks, which each have m equalization filters to generate m equalized sample streams. The m equalized sample streams from each equalization filter bank are input to a corresponding one of n noise predictive filters. Each noise predictive filter is an m-tap noise predictive filter that receives the m equalized sample streams from a corresponding one of the n equalization filter banks. Each noise predictive filter is associated with one of n data patterns. A filtered equalization stream is generated by each noise predictive filter. Noise sample streams are generated using the filtered equalization streams generated by the n noise predictive filters. A data sequence is detected using the noise sample streams.

Abstract translation: 一种用于检测数据序列的方法包括产生样本流，其是与模拟信号的样本相关联的时间序列数字信号。 样本流被输入到n个均衡滤波器组，每个均衡滤波器组具有m个均衡滤波器以产生m个均衡的采样流。 来自每个均衡滤波器组的m个均衡的采样流被输入到n个噪声预测滤波器中的对应的一个。 每个噪声预测滤波器是从n个均衡滤波器组中的相应一个接收m个均衡的采样流的m抽头噪声预测滤波器。 每个噪声预测滤波器与n个数据模式之一相关联。 滤波均衡流由每个噪声预测滤波器产生。 使用由n个噪声预测滤波器生成的滤波均衡流来生成噪声采样流。 使用噪声样本流检测数据序列。

公开(公告)号：US08873180B2

公开(公告)日：2014-10-28

申请号：US13856210

申请日：2013-04-03

Applicant: LSI Corporation

Inventor： Yu Liao ,  Haotian Zhang ,  Haitao Xia

IPC: G11B5/09 ,  G11B27/30 ,  H04L7/033

CPC classification number: H04L7/0331 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/10222 ,  H04L7/0062 ,  H04L7/04

Abstract: Embodiments of the invention can be manifested as methods for converting analog waveforms into digital sampled signals. In at least one such embodiment, the method includes (i) sampling, based on a sampling-clock signal, an analog waveform received from a transmission channel to generate a digital sampled signal, (ii) generating a digital target signal by applying a specified reference data pattern to a model of the transmission channel, and (iii) adjusting the sampling-clock signal by comparing the digital sampled signal to the digital target signal. Embodiments of the invention can also be manifested as apparatuses that convert analog waveforms into digital sampled signals.

Abstract translation: 本发明的实施例可以表现为将模拟波形转换为数字采样信号的方法。 在至少一个这样的实施例中，该方法包括（i）基于采样时钟信号对从传输信道接收的模拟波形进行采样以产生数字采样信号，（ii）通过应用指定的 参考数据模式到传输信道的模型，以及（iii）通过将数字采样信号与数字目标信号进行比较来调整采样时钟信号。 本发明的实施例也可以表现为将模拟波形转换为数字采样信号的装置。

公开(公告)号：US08837068B1

公开(公告)日：2014-09-16

申请号：US14259424

申请日：2014-04-23

Applicant: LSI Corporation

Inventor： Yu Liao ,  Jeffrey P. Grundvig ,  Jin Lu ,  Richard Rauschmayer

IPC: G11B5/09

CPC classification number: G11B5/59688 ,  G11B5/59622

Abstract: A servo system includes multiple interpolators operable to interpolate equalized data for multiple signal paths in a two dimensional magnetic recording system to yield interpolated signals at different phases, scaling circuits operable to scale the interpolated signals by adaptive scaling factors, a signal combining circuit operable to combine the scaled signals, a phase tracking circuit operable to select one of the phases of the combined signal, and an error gradient circuit operable to adapt the adaptive scaling factors.

Abstract translation: 伺服系统包括多个内插器，其可操作以在二维磁记录系统中内插多个信号路径的均衡数据，以产生不同相位的内插信号，缩放电路可操作以通过自适应缩放因子缩放内插信号;信号组合电路，可操作以组合 缩放信号，可操作以选择组合信号的相位之一的相位跟踪电路和可操作以适应自适应缩放因子的误差梯度电路。

公开(公告)号：US20140104717A1

公开(公告)日：2014-04-17

申请号：US13652706

申请日：2012-10-16

Applicant: LSI CORPORATION

Inventor： Haotian Zhang ,  Yu Liao ,  Haitao Xia

IPC: G11B5/09

CPC classification number: G11B20/10027

Abstract: Aspects of the disclosure pertain to a system and method for providing zero gain start (ZGS) and gain acquisition based on an adaptive analog-to-digital converter (ADC) target. The adaptive ADC target is used to collect channel characteristics and based on the adaptive ADC target, an adjusted 2T amplitude target value is generated.

Abstract translation: 本公开的方面涉及用于基于自适应模数转换器（ADC）目标提供零增益开始（ZGS）和增益采集的系统和方法。 自适应ADC目标用于收集信道特性，并基于自适应ADC目标，产生调整后的2T幅度目标值。

公开(公告)号：US09129647B2

公开(公告)日：2015-09-08

申请号：US14136051

申请日：2013-12-20

Applicant: LSI Corporation

Inventor： Yu Liao ,  Xun Zhang ,  Haitao Xia

IPC: G11B5/02 ,  G11B20/10 ,  G11B5/55 ,  G11B5/035

CPC classification number: G11B20/10046 ,  G11B5/035 ,  G11B5/5526

Abstract: A servo system includes an equalizer circuit operable to filter digital servo data samples according to filter tap coefficients to yield equalized data, a detector circuit operable to apply a data detection algorithm to the equalized data to yield hard decisions, a convolution circuit operable to yield ideal digital data based on the hard decisions and on target values, a subtraction circuit operable to subtract the ideal digital data from the equalized data to yield an adaptation error signal, an error gradient calculator operable calculate an error gradient signal based at least in part on the adaptation error signal, and a tap adaptation circuit operable to calculate values of the filter tap coefficients based on the error gradient signal.

Abstract translation: 伺服系统包括均衡器电路，其可操作以根据滤波器抽头系数对数字伺服数据样本进行滤波以产生均衡的数据;检测器电路，可操作以将数据检测算法应用于均衡数据以产生硬判决;卷积电路， 基于硬判决和目标值的数字数据，减法电路，用于从均衡数据中减去理想数字数据以产生自适应误差信号，误差梯度计算器可操作地至少部分地基于 适应误差信号，以及可用于基于误差梯度信号计算滤波器抽头系数的值的抽头自适应电路。

公开(公告)号：US20140168810A1

公开(公告)日：2014-06-19

申请号：US13714233

申请日：2012-12-13

Applicant: LSI CORPORATION

Inventor： Haotian Zhang ,  Yu Liao ,  Haitao Xia

IPC: G11B27/32 ,  H04B1/10

CPC classification number: G11B27/322 ,  G11B5/59616 ,  G11B20/10 ,  G11B27/3072 ,  G11B2220/2508 ,  H04B1/1027

Abstract: The present inventions are related to systems and methods for data processing, and more particularly to systems and methods for detecting patterns in a data stream.

Abstract translation: 本发明涉及用于数据处理的系统和方法，更具体地涉及用于检测数据流中的模式的系统和方法。

公开(公告)号：US20140268391A1

公开(公告)日：2014-09-18

申请号：US13798566

申请日：2013-03-13

Applicant: LSI CORPORATION

Inventor： Yu Liao ,  Haitao Xia

IPC: G11B20/10

CPC classification number: G11B20/10046

Abstract: A method for detecting a data sequence includes generating a sample stream, which is a time-sequenced digital signal associated with samples of an analog signal. The sample stream is input to n equalization filter banks, which each have m equalization filters to generate m equalized sample streams. The m equalized sample streams from each equalization filter bank are input to a corresponding one of n noise predictive filters. Each noise predictive filter is an m-tap noise predictive filter that receives the m equalized sample streams from a corresponding one of the n equalization filter banks. Each noise predictive filter is associated with one of n data patterns. A filtered equalization stream is generated by each noise predictive filter. Noise sample streams are generated using the filtered equalization streams generated by the n noise predictive filters. A data sequence is detected using the noise sample streams.

Abstract translation: 一种用于检测数据序列的方法包括产生样本流，其是与模拟信号的样本相关联的时间序列数字信号。 样本流被输入到n个均衡滤波器组，每个均衡滤波器组具有m个均衡滤波器以产生m个均衡的采样流。 来自每个均衡滤波器组的m个均衡的采样流被输入到n个噪声预测滤波器中的对应的一个。 每个噪声预测滤波器是从n个均衡滤波器组中的相应一个接收m个均衡的采样流的m抽头噪声预测滤波器。 每个噪声预测滤波器与n个数据模式之一相关联。 滤波均衡流由每个噪声预测滤波器产生。 使用由n个噪声预测滤波器生成的滤波均衡流来生成噪声采样流。 使用噪声样本流检测数据序列。

公开(公告)号：US08817401B2

公开(公告)日：2014-08-26

申请号：US13652706

申请日：2012-10-16

Applicant: LSI Corporation

Inventor： Haotian Zhang ,  Yu Liao ,  Haitao Xia

IPC: G11B5/09

CPC classification number: G11B20/10027

Abstract: Aspects of the disclosure pertain to a system and method for providing zero gain start (ZGS) and gain acquisition based on an adaptive analog-to-digital converter (ADC) target. The adaptive ADC target is used to collect channel characteristics and based on the adaptive ADC target, an adjusted 2T amplitude target value is generated.

Abstract translation: 本公开的方面涉及用于基于自适应模数转换器（ADC）目标提供零增益开始（ZGS）和增益获取的系统和方法。 自适应ADC目标用于收集信道特性，并基于自适应ADC目标，产生调整后的2T幅度目标值。