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81. 发明申请

US20130335849A1 ADAPTIVE SOFT-OUTPUT DETECTOR FOR MAGNETIC TAPE READ CHANNELS 失效
标题翻译：用于磁带读取通道的自适应软输出检测器
公开(公告)号：US20130335849A1
公开(公告)日：2013-12-19
申请号：US13527490
申请日：2012-06-19
申请人： Katherine T. Blinick , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
发明人： Katherine T. Blinick , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
IPC分类号： G11B5/09
CPC分类号： G11B5/00817 , G11B5/09 , G11B20/10046 , G11B20/10074 , G11B20/10287 , G11B2220/90
摘要： In one embodiment, a system includes a tape channel for reading data from a magnetic tape medium to produce a signal, a bank of noise whitening filters positioned subsequent to the tape channel adapted for receiving the signal, the bank of noise whitening filters being adapted for minimizing variance of noise affecting the signal at an output of the bank of noise whitening filters, wherein each noise whitening filter in the bank of noise whitening filters is dependent on a different possible data pattern, a soft DMAX detector adapted for calculating first soft information, dependent on the different possible data patterns, about each bit of the signal from the bank of noise whitening filters, and sending the first soft information to a soft decoder adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft DMAX detector.
摘要翻译：在一个实施例中，系统包括用于从磁带介质读取数据以产生信号的带通道，位于适于接收信号的磁带通道之后的一组噪声白化滤波器，噪声增白滤波器组适于最小化影响噪声白化滤波器组的输出处的信号的噪声的方差，其中噪声白化滤波器组中的每个噪声白化滤波器取决于不同的可能数据模式，适于计算第一软信息的软DMAX检测器，取决于不同的可能数据模式，关于噪声白化滤波器组的信号的每个位，并且将第一软信息发送到软解码器，该软解码器适于计算关于信号的每个位的第二软信息，并且发送第二软信息到软DMAX检测器。

82. 发明申请

US20130335846A1 ADAPTIVE SOFT-OUTPUT DETECTOR FOR MAGNETIC TAPE READ CHANNELS 有权
标题翻译：用于磁带读取通道的自适应软输出检测器
公开(公告)号：US20130335846A1
公开(公告)日：2013-12-19
申请号：US13527508
申请日：2012-06-19
申请人： Katherine T. Blinick , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
发明人： Katherine T. Blinick , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
IPC分类号： G11B20/10 , G11B5/008 , G11B5/09
CPC分类号： G11B20/10046 , G11B5/008 , G11B20/10074 , G11B20/10287 , G11B2020/185 , G11B2020/1853 , G11B2220/90
摘要： In accordance with one embodiment, a data storage system includes a tape channel for reading precoded data from a magnetic tape medium to produce a signal, a soft detector adapted for calculating first soft information about each bit of the signal and sending the first soft information to a soft decoder, and the soft decoder positioned subsequent to the soft detector, the soft decoder being adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft detector, wherein the precoded data includes a characteristic of being passed through at least one precoder prior to being written to the magnetic tape medium, and wherein the soft detector provides automatic compensation for the precoded data. Other systems, methods, and computer program products for reading data using an adaptive soft-output detector are described according to more embodiments.
摘要翻译：根据一个实施例，数据存储系统包括用于从磁带介质读取预编码数据以产生信号的磁带通道，软检测器，适于计算关于信号的每个位的第一软信息，并将第一软信息发送到软解码器和位于软检测器之后的软解码器，软解码器适于计算关于信号的每个位的第二软信息，并将第二软信息发送给软检测器，其中预编码数据包括在写入磁带介质之前通过至少一个预编码器，并且其中软检测器为预编码数据提供自动补偿。根据更多实施例描述了使用自适应软输出检测器读取数据的其它系统，方法和计算机程序产品。

83. 发明授权

US08605380B1 Technique for fixing tap coefficients in a programmable finite-impulse-response equalizer 失效
标题翻译：在可编程有限脉冲响应均衡器中固定抽头系数的技术
公开(公告)号：US08605380B1
公开(公告)日：2013-12-10
申请号：US13550603
申请日：2012-07-17
申请人： Eric Rolf Christensen , Ernest Stewart Gale , Robert Allen Hutchins , Sedat Oelcer
发明人： Eric Rolf Christensen , Ernest Stewart Gale , Robert Allen Hutchins , Sedat Oelcer
IPC分类号： G11B5/035
CPC分类号： G11B5/00817 , G11B5/09 , G11B20/10009 , G11B20/10046 , G11B2220/90
摘要： A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. Using these initial values, a “total” FIR equalizer is determined which sets the tap coefficients to their initial values. The method further determines multiple sets of tap coefficients that may potentially be fixed in the FIR equalizer. For each set of tap coefficients that may potentially be fixed, the method determines a “fixed” FIR equalizer that sets the tap coefficients in the set to their initial values and other tap coefficients to zero. The method then determines a phase-difference energy between the “total” FIR equalizer and the “fixed” FIR equalizer for each set of tap coefficients that may potentially be fixed. The set of tap coefficients associated with the lowest phase-difference energy are then fixed.
摘要翻译：用于选择要修复的可编程有限脉冲响应（FIR）均衡器的抽头系数的方法包括执行初始校准以确定FIR均衡器的每个抽头系数的初始值。使用这些初始值，确定“总共”FIR均衡器，其将抽头系数设置为其初始值。该方法还确定可能在FIR均衡器中可能固定的多组抽头系数。对于潜在固定的每组抽头系数，该方法确定一个“固定”FIR均衡器，其将集合中的抽头系数设置为其初始值和其他抽头系数为零。该方法然后确定可能可能固定的每组抽头系数的“总”FIR均衡器和“固定”FIR均衡器之间的相位差能量。然后，与最低相位差能量相关联的抽头系数的集合是固定的。

84. 发明授权

US08254048B2 Dual gain control for magnetic data storage system 有权
标题翻译：磁数据存储系统的双增益控制
公开(公告)号：US08254048B2
公开(公告)日：2012-08-28
申请号：US13101969
申请日：2011-05-05
申请人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
IPC分类号： G11B5/09
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10027
摘要： A system according to one embodiment includes an analog input for receiving an analog signal; a variable gain amplifier coupled to the analog input; a first gain control circuit coupled to the variable gain amplifier for controlling the gain of the analog signal; an analog to digital converter for converting the analog signal to a digital signal; a first gain error generation circuit for generating a first gain error signal based on an output of the analog to digital converter, the first gain error signal or derivative thereof being received by the first gain control circuit; and a second gain error generation circuit for generating a second gain error signal based on the digital signal, the second gain error signal or derivative thereof being received by the first gain control circuit, wherein the first gain control circuit uses at least one of the gain error signals to control the gain of the analog signal.
摘要翻译：根据一个实施例的系统包括用于接收模拟信号的模拟输入; 耦合到模拟输入的可变增益放大器; 耦合到可变增益放大器的第一增益控制电路，用于控制模拟信号的增益; 用于将模拟信号转换成数字信号的模数转换器; 第一增益误差产生电路，用于基于所述模数转换器的输出产生第一增益误差信号，所述第一增益误差信号或其导数由所述第一增益控制电路接收; 以及第二增益误差产生电路，用于根据由第一增益控制电路接收的数字信号，第二增益误差信号或其导数产生第二增益误差信号，其中第一增益控制电路使用增益中的至少一个误差信号来控制模拟信号的增益。

85. 发明授权

US08094397B2 System, method, and computer program product for characterizing media associated with data storage channels 有权
标题翻译：用于表征与数据存储通道相关联的介质的系统，方法和计算机程序产品
公开(公告)号：US08094397B2
公开(公告)日：2012-01-10
申请号：US12350108
申请日：2009-01-07
申请人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Hisato Matsuo , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Hisato Matsuo , Sedat Oelcer
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10055 , G11B20/10175 , G11B20/10222 , G11B2220/90
摘要： A system in one embodiment includes multiple analog inputs for receiving readback signals, an analog to digital converter coupled to each of the analog inputs for converting the readback signals to digital signals, a buffer coupled to outputs of the analog to digital converters for at least temporarily storing the digital signals, and a digital processing section also coupled to outputs of the analog to digital converters for processing the digital signals for reconstructing data therefrom. A method in one embodiment includes receiving multiple channels of analog readback signals from a magnetic head, converting the analog signals in each channel to digital signals, buffering the digital signals, and outputting the buffered digital signals. A method in another embodiment includes receiving a readback waveform from a magnetic storage device, reducing a frequency offset of the readback waveform, and generating a synchronized, oversampled waveform from the readback waveform.
摘要翻译：一个实施例中的系统包括用于接收回读信号的多个模拟输入，耦合到每个模拟输入的模数转换器，用于将回读信号转换成数字信号;耦合到模数转换器的输出的缓冲器，用于至少暂时地存储数字信号，以及数字处理部分，其耦合到模数转换器的输出端，用于处理数字信号以从其重构数据。一个实施例中的方法包括从磁头接收多个通道的模拟回读信号，将每个通道中的模拟信号转换成数字信号，缓冲数字信号，并输出缓冲的数字信号。另一实施例中的方法包括从磁存储设备接收回读波形，减少回读波形的频率偏移，以及从回读波形生成同步的过采样波形。

86. 发明申请

US20110246864A1 DATA DEPENDENT NPML DETECTION AND SYSTEMS THEREOF 失效
标题翻译：数据依赖性NPML检测及其系统
公开(公告)号：US20110246864A1
公开(公告)日：2011-10-06
申请号：US12750350
申请日：2010-03-30
申请人： Evangelos S. Eleftheriou , Robert A. Hutchins , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert A. Hutchins , Sedat Oelcer
IPC分类号： G06F11/07
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10379 , G11B20/10509 , G11B2220/2516
摘要： According to one embodiment, a data detection system includes a coefficient-and-variance engine for selecting which infinite impulse response (IIR) filter and prediction error variance to process and store at any time, and a maximum-likelihood sequence detector. The coefficient-and-variance engine comprises a filter bank storing a plurality of IIR filters that represent a plurality of data-dependent noise whitening or noise prediction filters; a least-mean square (LMS) engine for adapting each IIR filter to actual noise conditions: a variance hank storing a plurality of prediction error variance values; and a data-dependent prediction error variance computation unit which updates the plurality of prediction error variance values. The maximum-likelihood sequence detector includes a metric computation unit that employs the plurality of IIR filters in the filter bank and the plurality of prediction error variances in the variance bank to adaptively compute detector branch metrics. Other systems and methods are also described in other embodiments.
摘要翻译：根据一个实施例，数据检测系统包括用于选择在任何时间处理和存储的无限脉冲响应（IIR）滤波器和预测误差方差的系数和方差引擎和最大似然序列检测器。系数和方差引擎包括存储多个表示多个数据相关噪声白化或噪声预测滤波器的IIR滤波器的滤波器组; 用于使每个IIR滤波器适应于实际噪声条件的最小均方（LMS）引擎：存储多个预测误差方差值的方差汉克; 以及数据相关预测误差方差计算单元，其更新所述多个预测误差方差值。最大似然序列检测器包括在滤波器组中采用多个IIR滤波器的度量计算单元，并且方差库中的多个预测误差方差自适应地计算检测器分支度量。其他系统和方法也在其他实施例中描述。

87. 发明申请

US20110228424A1 DUAL GAIN CONTROL FOR MAGNETIC DATA STORAGE SYSTEM 有权
标题翻译：磁数据存储系统的双增益控制
公开(公告)号：US20110228424A1
公开(公告)日：2011-09-22
申请号：US13101969
申请日：2011-05-05
申请人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
IPC分类号： G11B5/78 , H03L7/06
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10027
摘要： A system according to one embodiment includes an analog input for receiving an analog signal; a variable gain amplifier coupled to the analog input; a first gain control circuit coupled to the variable gain amplifier for controlling the gain of the analog signal; an analog to digital converter for converting the analog signal to a digital signal; a first gain error generation circuit for generating a first gain error signal based on an output of the analog to digital converter, the first gain error signal or derivative thereof being received by the first gain control circuit; and a second gain error generation circuit for generating a second gain error signal based on the digital signal, the second gain error signal or derivative thereof being received by the first gain control circuit, wherein the first gain control circuit uses at least one of the gain error signals to control the gain of the analog signal.
摘要翻译：根据一个实施例的系统包括用于接收模拟信号的模拟输入; 耦合到模拟输入的可变增益放大器; 耦合到可变增益放大器的第一增益控制电路，用于控制模拟信号的增益; 用于将模拟信号转换成数字信号的模数转换器; 第一增益误差产生电路，用于基于所述模数转换器的输出产生第一增益误差信号，所述第一增益误差信号或其导数由所述第一增益控制电路接收; 以及第二增益误差产生电路，用于根据由第一增益控制电路接收的数字信号，第二增益误差信号或其导数产生第二增益误差信号，其中第一增益控制电路使用增益中的至少一个误差信号来控制模拟信号的增益。

88. 发明授权

US07864467B2 Gain control for data-dependent detection in magnetic storage read channels 有权
标题翻译：磁存储读通道中数据相关检测的增益控制
公开(公告)号：US07864467B2
公开(公告)日：2011-01-04
申请号：US12027258
申请日：2008-02-06
申请人： Evangelos S. Eleftheriou , Robert A. Hutchins , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert A. Hutchins , Sedat Oelcer
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10037 , G11B20/24 , G11B2220/2516
摘要： Method, apparatus and computer program product adjust gain in a read channel of a magnetic media data storage device. A digital signal sample having a data-dependent noise component is received. A gain value, stored in a location in a gain table, is selected in a data-dependent manner. The gain of the signal sample is adjusted in response to the selected gain value. A bit pattern is detected from the gain-adjusted signal sample and a data output signal is output based upon the detected bit pattern.
摘要翻译：方法，装置和计算机程序产品调整磁介质数据存储装置的读通道中的增益。接收具有数据相关噪声分量的数字信号采样。以数据相关的方式选择存储在增益表中的位置的增益值。响应于所选择的增益值来调整信号采样的增益。从增益调整信号采样中检测位模式，并且基于检测到的位模式输出数据输出信号。

89. 发明授权

US07773327B2 Multi-channel data detection phase locked loop frequency error combination logic 失效
标题翻译：多通道数据检测锁相环频率误差组合逻辑
公开(公告)号：US07773327B2
公开(公告)日：2010-08-10
申请号：US11870921
申请日：2007-10-11
申请人： Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
发明人： Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10037 , G11B20/10425
摘要： Frequency error combination for a multi-channel data detection system with a phase locked loop for each channel, comprises receiving frequency error information with respect to each channel; combination logic configured to combine the received frequency error information and generate a combined phase error, weighting the received frequency error information from each channel; and a frequency error output configured to apply the combined frequency error to at least one channel phase locked loop.
摘要翻译：针对每个通道的具有锁相环的多通道数据检测系统的频率误差组合包括接收关于每个通道的频率误差信息; 组合逻辑，其被配置为组合所接收的频率误差信息并产生组合的相位误差，从每个信道对所接收的频率误差信息进行加权; 以及频率误差输出，被配置为将组合的频率误差应用于至少一个通道锁相环。

90. 发明申请

US20100176865A1 GAIN CONTROL WITH MULTIPLE INTEGRATORS 有权
标题翻译：增益控制与多个积分器
公开(公告)号：US20100176865A1
公开(公告)日：2010-07-15
申请号：US12351403
申请日：2009-01-09
申请人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
发明人： Jacob Lee Dahle , Robert Allen Hutchins , Sedat Oelcer , Larry LeeRoy Tretter
IPC分类号： G06G7/18
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/10027 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175 , G11B20/10212 , G11B20/10425 , G11B2220/90
摘要： A system according to one embodiment includes an analog input for receiving an analog signal; a variable gain amplifier coupled to the analog input; a first integrator coupled to the variable gain amplifier for controlling the gain of the analog signal; a second integrator generating control signals for controlling functions of the first integrator; a serializer for serializing the control signals; and a deserializer coupled to the serializer for deserializing the control signals and passing the deserialized control signals to the first integrator.
摘要翻译：根据一个实施例的系统包括用于接收模拟信号的模拟输入; 耦合到模拟输入的可变增益放大器; 耦合到可变增益放大器的第一积分器，用于控制模拟信号的增益; 产生用于控制第一积分器的功能的控制信号的第二积分器; 用于串行化控制信号的串行器; 以及耦合到串行器的解串器，用于反序列化控制信号并将反序列化的控制信号传递给第一积分器。

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