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61. 发明申请

US20130335845A1 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：US20130335845A1
公开(公告)日：2013-12-19
申请号：US13527501
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： G11B20/24 , G11B5/008
CPC分类号： G11B20/10046 , G11B5/008 , G11B20/10074 , G11B20/10287 , G11B2020/185 , G11B2020/1853 , G11B2220/956
摘要： In one embodiment, a data storage system includes a tape channel for reading data from a tape to produce a signal, an adaptive noise whitening filter adapted for receiving the signal, the noise whitening filter being adapted for minimizing variance of noise affecting the signal output from the noise whitening filter, a soft DMAX detector adapted for receiving the signal from the noise whitening filter, the 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 DMAX detector, wherein one or more noise whitening coefficients used in the noise whitening filter are updated using a noise whitening filter coefficient updater.
摘要翻译：在一个实施例中，数据存储系统包括用于从磁带读取数据以产生信号的磁带通道，适于接收该信号的自适应噪声白化滤波器，所述噪声白化滤波器适于最小化影响从噪声白化滤波器，适于接收来自噪声白化滤波器的信号的软DMAX检测器，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，以及软解码器定位在软检测器之后，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到软DMAX检测器，其中在噪声白化滤波器中使用的一个或多个噪声白化系数被更新使用噪声美白滤波系数更新器。

62. 发明申请

US20130326305A1 DATA FORMAT USING AN EFFICIENT REVERSE CONCATENATED MODULATION CODE FOR MAGNETIC TAPE RECORDING 有权
标题翻译：使用有效的反向调整码进行磁带记录的数据格式
公开(公告)号：US20130326305A1
公开(公告)日：2013-12-05
申请号：US13483004
申请日：2012-05-29
申请人： Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
发明人： Roy D. Cideciyan , Robert A. Hutchins , Thomas Mittelholzer , Sedat Oelcer
IPC分类号： H03M13/00
CPC分类号： G11B5/00813 , G11B20/1833 , G11B2020/1836 , G11B2020/185 , G11B2020/1853 , G11B2220/90 , H03M5/145 , H03M13/1102 , H03M13/13 , H03M13/1515 , H03M13/2906
摘要： In one embodiment, a tape drive system includes a write channel for writing data to a magnetic tape, the write channel utilizing a rate-(232/234) reverse concatenated modulation code. The write channel includes logic adapted for receiving a data stream comprising one or more data sets, logic adapted for separating each data set into a plurality of sub data sets, logic adapted for encoding each sub data set with a C2 encoding, logic adapted for encoding each C2-encoded sub data set with a modulation code, logic adapted for encoding each modulated sub data set with a C1 encoding, and logic adapted for simultaneously writing the encoded modulated sub data sets to data tracks of the magnetic tape. Other systems for writing data to a magnetic tape utilizing a rate-(232/234) reverse concatenated modulation code are described according to various other embodiments.
摘要翻译：在一个实施例中，磁带驱动器系统包括用于将数据写入磁带的写入通道，该写入通道利用速率（232/234）反向级联调制码。写通道包括适于接收包括一个或多个数据组的数据流的逻辑，适用于将每个数据集分成多个子数据集的逻辑，适用于使用C2编码对每个子数据集进行编码的逻辑，适用于编码的逻辑具有调制码的每个C2编码的子数据集，适用于用C1编码对每个经调制的子数据集进行编码的逻辑，以及用于将编码的已调制子数据集同时写入到磁带的数据轨道的逻辑。根据各种其他实施例，描述使用速率（232/234）反向级联调制码将数据写入磁带的其它系统。

63. 发明申请

US20130128374A1 FIXING TAP COEFFICIENTS IN A PROGRAMMABLE FINITE-IMPULSE-RESPONSE EQUALIZER 有权
标题翻译：可编程有限冲突均衡器中的固定技巧系数
公开(公告)号：US20130128374A1
公开(公告)日：2013-05-23
申请号：US13304227
申请日：2011-11-23
申请人： Eric R. Christensen , Ernest S. Gale , Robert A. Hutchins , Sedat Oelcer
发明人： Eric R. Christensen , Ernest S. Gale , Robert A. Hutchins , Sedat Oelcer
IPC分类号： G11B20/18 , H03K5/159
CPC分类号： G11B20/10046 , G11B20/10509 , G11B2220/90 , H03H21/0012 , H03H2021/0072
摘要： A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix is disclosed. In one embodiment, such a method includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. These initial values may be used to produce a first waveform. The method then performs an operation on the first waveform to produce a second waveform comprising multiple lobes. The second waveform is then analyzed to determine one or more lobes of the second waveform that have the largest area. The method then fixes coefficients of one or more taps that are closest to the lobe or lobes having the largest area. A corresponding apparatus and computer program product are also disclosed.
摘要翻译：公开了一种用于选择可修复有限脉冲响应（FIR）均衡器的抽头系数以进行固定的方法。在一个实施例中，这种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。这些初始值可用于产生第一波形。该方法然后对第一波形执行操作以产生包括多个波瓣的第二波形。然后分析第二波形以确定具有最大面积的第二波形的一个或多个波瓣。该方法然后固定最靠近具有最大面积的凸角或凸角的一个或多个抽头的系数。还公开了相应的装置和计算机程序产品。

64. 发明申请

US20120126876A1 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：US20120126876A1
公开(公告)日：2012-05-24
申请号：US13342881
申请日：2012-01-03
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 method according to one embodiment includes receiving an increment signal at a first integrator when a second integrator overflows; receiving a decrement signal at the first integrator when the second integrator underflows; and incrementing or decrementing a gain applied to an analog signal based on receipt of the increment or decrement signal. A system according to one embodiment includes a first integrator configured to cause incrementing of a gain applied to an analog signal based on receipt of an increment signal when a second integrator overflows, the first integrator being configured to cause decrementing of the gain applied to the analog signal based on receipt of a decrement signal when the second integrator underflows; and the second integrator.
摘要翻译：根据一个实施例的方法包括当第二积分器溢出时在第一积分器处接收增量信号; 当第二积分器下溢时，在第一积分器处接收递减信号; 以及基于所述增量或减量信号的接收递增或递减施加到模拟信号的增益。根据一个实施例的系统包括第一积分器，其被配置为当第二积分器溢出时，基于接收到增量信号来增加施加到模拟信号的增益，所述第一积分器被配置为引起施加到模拟信号的增益的递减当第二积分器下溢时基于接收到递减信号的信号; 和第二个积分器。

65. 发明授权

US07924524B2 System and method for generating an amplitude error signal in a magnetic tape recording channel 有权
标题翻译：用于在磁带记录通道中产生振幅误差信号的系统和方法
公开(公告)号：US07924524B2
公开(公告)日：2011-04-12
申请号：US12351432
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： G11B5/035
CPC分类号： G11B5/035 , G11B20/10009 , G11B20/10027 , G11B2220/90 , H04L25/03248
摘要： A method according to one embodiment includes generating a first gain error, comprising: receiving an output of an equalizer; and comparing a magnitude of the output to a saturation threshold level; if the output is higher than the saturation threshold level, generating a first gain error. The method further including generating at least one of a second and a third gain error, wherein generating the second gain error comprises: using either a slicer or a trellis for generating the second gain error, wherein the slicer generates a gain error based on an output of an interpolator, wherein the trellis generates a gain error based on an output of a maximum likelihood detector; wherein generating the third gain error comprises: receiving an output of an equalizer; generating a threshold qualified peak from the equalizer output and a tracking threshold level; comparing the threshold qualified peak to a second threshold; and generating a third gain error based on the comparison.
摘要翻译：根据一个实施例的方法包括产生第一增益误差，包括：接收均衡器的输出; 以及将所述输出的幅度与饱和阈值电平进行比较; 如果输出高于饱和阈值电平，则产生第一增益误差。该方法还包括产生第二和第三增益误差中的至少一个，其中产生第二增益误差包括：使用限幅器或网格来产生第二增益误差，其中限幅器基于输出产生增益误差其中所述网格基于最大似然检测器的输出产生增益误差; 其中产生所述第三增益误差包括：接收均衡器的输出; 从均衡器输出产生阈值合格峰值和跟踪阈值电平; 将阈值合格峰值与第二阈值进行比较; 以及基于所述比较产生第三增益误差。

66. 发明授权

US07821733B2 Using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal 失效
标题翻译：使用测量误差来确定提供给均衡器的系数以用于均衡输入信号
公开(公告)号：US07821733B2
公开(公告)日：2010-10-26
申请号：US12189096
申请日：2008-08-08
申请人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Jens Jelitto , Sedat Oelcer
IPC分类号： G11B5/35
CPC分类号： G11B5/09 , G11B5/00817 , G11B20/10009 , G11B20/10046
摘要： Provided are a read channel, storage drive and method using a measured error to determine coefficients to provide to an equalizer to use to equalize an input signal. A read channel is incorporated in a storage device to process signals read from a storage medium. An equalizer uses coefficients to equalize input read signals to produce equalizer output signals. A detector processes adjusted equalizer output signals to determine output values comprising data represented by the input read signals. An equalizer adaptor is enabled to provide a reference measured error and coefficients used to produce the adjusted equalizer signals that are associated with the reference measured error. The equalizer adaptor computes new equalizer coefficients to use to equalize input read signals that result in a new measured error from the detector and computes a new measured error for the new equalizer coefficients. The equalizer adaptor determines whether the new measured error is degraded with respect to the reference measured error and saves the new equalizer coefficients and the new measured error in response to determining that the new measured error is not degraded with respect to the reference measured error. The equalizer adaptor provides the equalizer coefficients associated with the reference measured error to the equalizer to use to equalize input read signals in response to determining that the new measured error is degraded with respect to the reference measured error.
摘要翻译：提供了读通道，存储驱动器和使用测量误差的方法来确定提供给均衡器的系数以用于均衡输入信号。读取通道并入存储装置中以处理从存储介质读取的信号。均衡器使用系数来均衡输入读取信号以产生均衡器输出信号。检测器处理经调整的均衡器输出信号以确定包括由输入读信号表示的数据的输出值。启用均衡器适配器以提供参考测量误差和用于产生与参考测量误差相关联的经调整的均衡器信号的系数。均衡器适配器计算新的均衡器系数以用于均衡来自检测器的导致新的测量误差的输入读取信号，并且计算新的均衡器系数的新的测量误差。均衡器适配器确定新的测量误差是否相对于参考测量误差降级，并且响应于确定新的测量误差相对于参考测量误差而不降级而保存新的均衡器系数和新的测量误差。均衡器适配器将与参考测量误差相关联的均衡器系数提供给均衡器以用于响应于确定新的测量误差相对于参考测量误差而降级来均衡输入读取信号。

67. 发明申请

US20100189169A1 16-STATE ADAPTIVE NOISE PREDICTIVE MAXIMUM-LIKELIHOOD DETECTION SYSTEM 失效
标题翻译： 16状态自适应噪声预测最大似然检测系统
公开(公告)号：US20100189169A1
公开(公告)日：2010-07-29
申请号：US12360777
申请日：2009-01-27
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： H04L27/01 , H04L27/06
CPC分类号： H04L25/03299 , H04L25/03197 , H04L2025/03617
摘要： A 16-State adaptive NPML detector is provided for a tape drive which addresses weaknesses of a conventional fixed, 8-state EPR4 detector. Rather than having a fixed target channel, the detector is programmable to allow a range of target channels and can support “classical” partial response channels such as PR4 or EPR4 by programming predictor or whitening filter coefficients. In one embodiment, two filter coefficients may be set via XREG inputs or dynamically determined through the use of an LMS algorithm allowing the detector to adapt the predictor coefficients as data is being read. Another embodiment provides a detector for an EPR4 target in which the whitening filter has one coefficient. Components of the detection system include the detector itself, an LMS engine, a coefficient engine and a noise predictive or whitening filter. Coefficients from the LMS engine may be loaded or stored dynamically based upon conditions in the tape drive.
摘要翻译：为磁带驱动器提供了16状态自适应NPML检测器，其解决了常规固定的8状态EPR4检测器的缺点。不是具有固定的目标通道，检测器可编程以允许一定范围的目标通道，并且可以通过编程预测器或白化滤波器系数来支持“经典”部分响应通道，例如PR4或EPR4。在一个实施例中，可以经由XREG输入来设置两个滤波器系数，或者通过使用LMS算法动态地确定，允许检测器在正在读取数据时调整预测器系数。另一个实施例提供了一种用于EPR4目标的检测器，其中白化滤波器具有一个系数。检测系统的组件包括检测器本身，LMS引擎，系数引擎和噪声预测或增白滤波器。可以根据磁带驱动器中的条件动态地加载或存储来自LMS引擎的系数。

68. 发明授权

US07733592B2 Methods for multi-channel data detection phase locked loop frequency error combination 失效
标题翻译：多通道数据检测方法锁相环频率误差组合
公开(公告)号：US07733592B2
公开(公告)日：2010-06-08
申请号：US11870934
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： H04L7/0029 , H03L7/07 , H03L7/087 , H03L7/091 , H04L7/0025 , H04L7/0062 , H04L7/0083
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 of a signal relevant to a phase locked loop with respect to each channel; combining the received error signal information and generating a combined error signal, weighting the received error signal information from each channel, for example with reliability information. The combined frequency error signal is applied to at least one channel phase locked loop.
摘要翻译：针对每个通道具有锁相环的多通道数据检测系统的频率误差组合包括相对于每个通道接收与锁相环相关的信号的频率误差信息; 组合接收到的误差信号信息并产生组合误差信号，例如用可靠性信息对来自每个信道的接收到的误差信号进行加权。组合的频率误差信号被施加到至少一个通道锁相环。

69. 发明授权

US07573665B2 Magnetic tape read channel signal values developed employing intermediate bits of the path memory of a PRML Viterbi detector 失效
标题翻译：使用PRML维特比检测器的路径存储器的中间位开发的磁带读取通道信号值
公开(公告)号：US07573665B2
公开(公告)日：2009-08-11
申请号：US12143385
申请日：2008-06-20
申请人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
发明人： Evangelos S. Eleftheriou , Robert Allen Hutchins , Glen Alan Jaquette , Sedat Oelcer
IPC分类号： G11B5/09
CPC分类号： G11B20/10009 , G11B20/10037 , G11B20/10055 , G11B20/10074 , G11B20/10296 , G11B2220/90
摘要： Magnetic tape read channel signal values are developed employing intermediate bits of the path memory of a PRML Viterbi detector. Identification logic identifies a most likely path memory state of the PRML Viterbi detector from the path metrics of the PRML Viterbi detector. An intermediate bit sequence of the identified most likely path memory state is obtained, the intermediate bit sequence extending from an initiation point of the path memory which is intermediate the output and the input of the PRML Viterbi detector. A sample value is determined which corresponds to the obtained intermediate bit sequence.
摘要翻译：使用PRML维特比检测器的路径存储器的中间位来开发磁带读取通道信号值。识别逻辑根据PRML维特比检测器的路径度量来识别PRML维特比检测器的最可能的路径存储状态。获得所识别的最可能的路径存储器状态的中间比特序列，从位于PRML维特比检测器的输出和输入之间的路径存储器的起始点延伸的中间比特序列。确定对应于获得的中间位序列的采样值。

70. 发明申请

US20090103202A1 METHOD FOR AN EQUALIZER COMPUTATION IN A MEDIA SYSTEM USING A DATA SET SEPARATOR SEQUENCE 有权
标题翻译：使用数据集分离器序列在媒体系统中均衡器计算的方法
公开(公告)号：US20090103202A1
公开(公告)日：2009-04-23
申请号：US12251373
申请日：2008-10-14
申请人： Robert A. Hutchins , Evangelos S. Eleftheriou , Sedat Oelcer
发明人： Robert A. Hutchins , Evangelos S. Eleftheriou , Sedat Oelcer
IPC分类号： G11B5/035
CPC分类号： G11B5/09 , G11B20/10009 , G11B20/10046 , G11B20/10481 , G11B2005/0013 , G11B2220/90
摘要： Provided is a method for receiving a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. A coefficient cyclic equalizer vector is generated as a function of the DSS sequence and the DSS readback sequence. An error signal is generated as a function of a comparison of the DSS sequence and an equalization of the DSS readback sequence based on the coefficient cyclic equalizer vector. An unacceptable error signal indicates a need to adjust the coefficient cyclic equalizer vector to yield an acceptable comparison of the DSS sequence and an equalization of the DSS readback sequence based on the coefficient cyclic equalizer vector.
摘要翻译：提供了一种用于接收DSS序列和DSS回读序列的方法，DSS序列是通过读取信道对DSS序列的信道处理的函数。作为DSS序列和DSS回读序列的函数产生系数循环均衡器向量。根据系数循环均衡器向量，作为DSS序列与DSS回读序列的均衡的比较的函数产生误差信号。不可接受的误差信号指示需要调整系数循环均衡器向量以产生DSS序列的可接受比较和基于系数循环均衡器向量的DSS回读序列的均衡。

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