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1. 发明申请

WO2007088139A1 USING AT LEAST ONE SERVO CHANNEL TO PROVIDE TIMING RECOVERY AND TIMING INFORMATION TO DATA CHANNELS 审中-公开
标题翻译：使用至少一个服务器通道来为数据通道提供时序恢复和时序信息
公开(公告)号：WO2007088139A1
公开(公告)日：2007-08-09
申请号：PCT/EP2007/050772
申请日：2007-01-26
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , BUI, Nhan, Xuan , CHERUBINI, Giovanni , ELEFTHERIOU, Evangelos , HUTCHINS, Robert, Allen , JAQUETTE, Glen, Alan , JELITTO, Jens , OELCER, Sedat , TAYLOR, Mark, Allan
发明人： BUI, Nhan, Xuan , CHERUBINI, Giovanni , ELEFTHERIOU, Evangelos , HUTCHINS, Robert, Allen , JAQUETTE, Glen, Alan , JELITTO, Jens , OELCER, Sedat , TAYLOR, Mark, Allan
IPC分类号： G11B27/10 , G11B20/10
CPC分类号： G11B27/36 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10212 , G11B20/10259 , G11B20/1403 , G11B20/1876 , G11B27/10 , G11B2020/10592 , G11B2220/90 , G11B2220/95
摘要： Provided is a read channel, storage drive, and method to process signals read from a storage medium. At least one data channel including an interpolator and equalizer and a servo channel includes an interpolator. A timing recovery function processes a timing error from the interpolator in the servo channel to calculate interpolation timing information used by the interpolator to interpolate a servo channel signal. A path is coupled to the timing recovery function and the interpolator in the at least one data channel to communicate the interpolation timing information to the interpolator in the at least one data channel. The interpolator in the at least one data channel is configured to use the interpolation timing information to interpolate an asynchronous data channel signal.
摘要翻译：提供了一种用于处理从存储介质读取的信号的读通道，存储驱动器和方法。包括内插器和均衡器和伺服信道的至少一个数据信道包括内插器。定时恢复功能处理来自伺服信道中的内插器的定时误差，以计算内插器使用的内插定时信息来内插伺服信道信号。路径耦合到至少一个数据信道中的定时恢复功能和内插器，以将内插定时信息传送到至少一个数据信道中的内插器。至少一个数据信道中的内插器被配置为使用内插定时信息内插异步数据信道信号。

2. 发明申请

WO2007023012A1 READ CHANNEL APPARATUS FOR ASYNCHRONOUS OVERSAMPLING, SYNCHRONOUS FRACTIONALLY SPACED EQUALIZATION AND DIGITAL GAIN CONTROL 审中-公开
标题翻译：阅读频道设备，用于异步超声，同步分位均衡和数字增益控制
公开(公告)号：WO2007023012A1
公开(公告)日：2007-03-01
申请号：PCT/EP2006/063793
申请日：2006-07-03
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , ELEFTHERIOU, Evangelos , OELCER, Sedat , JAQUETTE, Glen, Alan , JELITTO, Jens , HUTCHINS, Robert, Allan
发明人： ELEFTHERIOU, Evangelos , OELCER, Sedat , JAQUETTE, Glen, Alan , JELITTO, Jens , HUTCHINS, Robert, Allan
IPC分类号： G11B20/10 , H04N5/52
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10046 , G11B20/10055
摘要： A read channel receiver apparatus and a method are disclosed. The read channel receiver chain comprises an analog to digital converter which asynchronously samples at a fixed rate an analog signal formed by reading a data track, where that data track was written to a data storage medium at a symbol rate, and an upsampler and interpolator interconnected with the analog to digital converter. The receiver further comprises a fractionally-spaced equalizer, where the interpolator provides a signal to the fractionally-spaced equalizer at an interpolation rate greater than the symbol rate. The fractionally-spaced equalizer forms a synchronous equalized signal. The receiver further comprises a digital gain control module interconnected with the fractionally-spaced equalizer, and a sequence detector outputing a maximum likelihood signal sequence.
摘要翻译：公开了一种读通道接收装置和方法。读通道接收器链包括模数转换器，其以固定速率异步采样通过读取数据轨道形成的模拟信号，其中数据轨道以符号速率写入数据存储介质，并且上采样器和内插器互连与模数转换器。接收机还包括分数间隔的均衡器，其中内插器以大于符号速率的插值速率向分数间隔的均衡器提供信号。分数间隔均衡器形成同步均衡信号。接收机还包括与分数间隔的均衡器互连的数字增益控制模块，以及输出最大似然信号序列的序列检测器。

3. 发明申请

WO2007051693A2 ADAPTIVE ASYNCHRONOUS EQUALIZATION USING LEAKAGE 审中-公开
标题翻译：使用漏洞自适应异步平衡
公开(公告)号：WO2007051693A2
公开(公告)日：2007-05-10
申请号：PCT/EP2006/067340
申请日：2006-10-12
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , HUTCHINS, Robert, Allen , ELEFTHERIOU, Evangelos , OELCER, Sedat , JELITTO, Jens
发明人： HUTCHINS, Robert, Allen , ELEFTHERIOU, Evangelos , OELCER, Sedat , JELITTO, Jens
IPC分类号： G11B20/10 , H04L25/03 , H03H21/00
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10175 , G11B20/10481 , H04L25/03019 , H04L2025/03484 , H04L2025/03681
摘要： An apparatus, system, and method are disclosed for adaptive asynchronous equalization using leakage. An equalizer sums products of a plurality of tap signals from a delay line sampling a read signal and a plurality of corresponding tap coefficients to form an equalized signal in an asynchronous time domain having a first sampling rate. A leaky function module calculates a leaky function for each tap coefficient in the asynchronous time domain. An adaptation module adapts each of the tap coefficients as the leaky function for each tap coefficient summed with a signal-dependent updating function for each tap coefficient.
摘要翻译：公开了一种使用泄漏的自适应异步均衡的装置，系统和方法。均衡器对来自采样读取信号的延迟线和多个相应抽头系数的多个抽头信号的乘积求和，以在具有第一采样率的异步时域中形成均衡信号。漏泄功能模块为异步时域中的每个抽头系数计算泄漏函数。适配模块将每个抽头系数适配为用于每个抽头系数的泄漏函数，并与每个抽头系数的依赖于信号的更新函数相加。

4. 发明申请

WO2007065842A1 USING A MEASURED ERROR TO DETERMINE COEFFICIENTS TO PROVIDE TO AN EQUALIZER TO USE TO EQUALIZE AN INPUT SIGNAL 审中-公开
标题翻译：使用测量错误确定系数以提供均衡器以均衡输入信号
公开(公告)号：WO2007065842A1
公开(公告)日：2007-06-14
申请号：PCT/EP2006/069110
申请日：2006-11-30
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , ELEFTHERIOU, Evangelos , HUTCHINS, Robert, Allen , JELITTO, Jens , OELCER, Sedat
发明人： ELEFTHERIOU, Evangelos , HUTCHINS, Robert, Allen , JELITTO, Jens , OELCER, Sedat
IPC分类号： G11B20/10 , G11B5/035
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.
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。

5. 发明申请

WO2007085529A1 SYNCHRONOUS SERVO CHANNEL FOR LONGITUDINAL POSITION DETECTION AND POSITION ERROR SIGNAL GENERATION IN TAPE DRIVE SYSTEMS 审中-公开
标题翻译：用于纵向位置检测的同步伺服通道和带状驱动系统中的位置错误信号产生
公开(公告)号：WO2007085529A1
公开(公告)日：2007-08-02
申请号：PCT/EP2007/050212
申请日：2007-01-10
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , IBM UNITED KINGDOM LIMITED , CHERUBINI, Giovanni , ELEFTHERIOU, Evangelos , JELITTO, Jens , HUTCHINS, Robert
发明人： CHERUBINI, Giovanni , ELEFTHERIOU, Evangelos , JELITTO, Jens , HUTCHINS, Robert
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： A fully synchronous longitudinal position (LPOS) detection system is provided for improving the reliability of servo channels in tape systems. The system is based on the interpolation of the servo channel output signal, which is sampled by an analog-to-digital converter (ADC) at a fixed sampling rate, using a clock at a nominal frequency, so that interpolated signal samples are obtained at a predetermined fixed rate, independent of tape velocity. This predetermined fixed rate is defined in terms of samples per unit of length, as opposed to samples per unit of time, which is the measure of the ADC sampling rate. The resolution with which the servo channel signal is obtained at the interpolator output is thus determined by the step interpolation distance.
摘要翻译：提供了全同步纵向位置（LPOS）检测系统，用于提高磁带系统中伺服通道的可靠性。该系统基于使用以标称频率的时钟由固定采样率的模数转换器（ADC）采样的伺服信道输出信号的内插，从而获得内插信号样本一个预定的固定速率，与磁带速度无关。这个预定的固定速率是根据单位长度的样本来定义的，而不是每单位时间的样本，这是ADC采样率的量度。因此，通过步进插补距离来确定在内插器输出处获得伺服信道信号的分辨率。

6. 发明申请

WO2011054570A1 CANCELLATION OF TIME-VARYING PERIODIC DISTURBANCES IN SERVO CONTROL SYSTEMS 审中-公开
标题翻译：在伺服控制系统中取消时变周期性干扰
公开(公告)号：WO2011054570A1
公开(公告)日：2011-05-12
申请号：PCT/EP2010/063345
申请日：2010-09-13
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , PANTAZI, Angeliki , ELEFTHERIOU, Evangelos , JELITTO, Jens , BUI, Nhan, Xuan
发明人： PANTAZI, Angeliki , ELEFTHERIOU, Evangelos , JELITTO, Jens , BUI, Nhan, Xuan
IPC分类号： G11B5/584 , G11B5/008
CPC分类号： G11B5/584 , G11B5/00813
摘要： Various embodiments for addressing time-varying periodic disturbances in a servo control system are provided. Each of a plurality of coefficients is updated based on an estimation of at least one disturbance frequency. The updated plurality of coefficients is provided to at least one peak filter modifying an input signal of the servo control system. The peak filter is operable in view of the updated plurality of coefficients to cancel at least 10 one of the time-varying periodic disturbances.
摘要翻译：提供了用于解决伺服控制系统中的时变周期性干扰的各种实施例。基于至少一个干扰频率的估计来更新多个系数中的每一个。更新的多个系数被提供给修改伺服控制系统的输入信号的至少一个峰值滤波器。考虑到更新的多个系数，峰值滤波器可操作以消除时变周期性干扰中的至少10个。

7. 发明申请

WO2011107358A1 METHOD USING ALTERNATIVE TIMING INTERVALS IN A SERVO BAND 审中-公开
标题翻译：在伺服带中使用替代时序间隔的方法
公开(公告)号：WO2011107358A1
公开(公告)日：2011-09-09
申请号：PCT/EP2011/052433
申请日：2011-02-18
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , HANCOCK, Reed, Alan , BUI, Nhan, Xuan , JELITTO, Jens , CHERUBINI, Giovanni , TSURUTA, Kazuhiro
发明人： HANCOCK, Reed, Alan , BUI, Nhan, Xuan , JELITTO, Jens , CHERUBINI, Giovanni , TSURUTA, Kazuhiro
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： An alternative time interval is taken of a timing based servo band to determine lateral position of a servo read head. The servo band is arranged in a sequence bursts with non- parallel servo stripes in sequentially adjacent sub-frames of a linear tape. The timing intervals comprise at least a first time interval (A) between a first pair of non-parallel servo stripes of a sub-frame; and an alternative time interval (C) between a pair of non-parallel servo stripes intermediate the first time intervals (A), the alternative interval servo stripes of sequentially adjacent sub-frames comprising a second servo stripe of the first pair, and a first servo stripe of a sequentially succeeding first pair. Position signals are ratios involving the first and second time intervals.
摘要翻译：采用基于定时的伺服频带的替代时间间隔来确定伺服读取头的横向位置。在线性带的顺序相邻的子帧中，伺服带以非平行的伺服条以序列突发排列。定时间隔包括子帧的第一对非平行伺服条带之间的至少第一时间间隔（A）; 以及在第一时间间隔（A）之间的一对非平行伺服条之间的替代时间间隔（C），包括第一对的第二伺服条的顺序相邻子帧的替代间隔伺服条，以及第一对顺序后续的第一对的伺服条纹。位置信号是涉及第一和第二时间间隔的比率。

8. 发明申请

WO2009047118A1 MULTI-CHANNEL DATA DETECTION 审中-公开
标题翻译：多通道数据检测
公开(公告)号：WO2009047118A1
公开(公告)日：2009-04-16
申请号：PCT/EP2008/062757
申请日：2008-09-24
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , HUTCHINS, Robert, Allen , JELITTO, Jens , OELCER, Sedat
发明人： HUTCHINS, Robert, Allen , JELITTO, Jens , OELCER, Sedat
IPC分类号： H03L7/07 , H03L7/093 , G11B20/20 , G11B20/14
CPC分类号： H03L7/0994 , G11B20/10037 , G11B20/1403 , G11B20/20 , H03L7/07 , H03L7/093
摘要： Common sample timing control for sample timing of multiple read channels, wherein the signalclocking of the signals received by the multiple read channels are correlated, for example from parallel tracks of magnetic tape that have been written simultaneously. A common sample timing control comprises multiplephase error inputs (91, 92), each indicating phase error of one of the read channels. Logic responsive to the multiple phaseerror inputs is configured to weight and crosscouple the phase error indication of each phase error input withthe phase error indication of each other phase error input, and to apply gain related to the variance of noise of the phase error indications. Feedback logic (141, 142) is responsive to the crosscoupling and is configured to provide a sample timing phase estimate (111, 112) for each read channel.
摘要翻译：用于多个读取通道的采样定时的公共采样定时控制，其中由多个读取通道接收的信号的信号频率例如与已经被同时写入的磁带的平行轨道相关联。公共采样定时控制包括多相误差输入（91,92），每个指示一个读通道的相位误差。响应于多个相位误差输入的逻辑被配置为对每个相位误差输入的相位误差指示进行加权和交叉并联，并且与相位误差指示的噪声方差相关地应用增益。反馈逻辑（141,142）响应于交叉耦合，并且被配置为为每个读取通道提供采样定时相位估计（111,112）。

9. 发明申请

WO2009136374A2 HEAD DESIGN FOR WRITING SERVO PATTERNS ON MAGNETIC TAPE 审中-公开
标题翻译：用于在磁带上书写伺服图案的头设计
公开(公告)号：WO2009136374A2
公开(公告)日：2009-11-12
申请号：PCT/IB2009/051882
申请日：2009-05-07
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , CHERUBINI, Giovanni , CIDECIYAN, Roy, D. , ELEFTHERIOU, Evangelos, S. , JELITTO, Jens , LANTZ, Mark, A.
发明人： CHERUBINI, Giovanni , CIDECIYAN, Roy, D. , ELEFTHERIOU, Evangelos, S. , JELITTO, Jens , LANTZ, Mark, A.
IPC分类号： G11B5/584 , G11B21/10
CPC分类号： G11B5/584
摘要： A servo write head is provided and is configured to simultaneously write at least two servo patterns in respective servo bands on linear magnetic tape. Centerlines of the servo patterns are substantially uniformly spaced in the lateral direction. In addition, the servo patterns of all adjacent respective servo bands are displaced relative to each other in a longitudinal direction by an amount that is related to a length of a servo frame and a type of the servo patterns.
摘要翻译：提供了伺服写入头，并被配置为在线性磁带上的相应伺服带中同时写入至少两个伺服模式。伺服图案的中心线在横向方向上基本上均匀间隔开。此外，所有相邻的各个伺服带的伺服模式在纵向方向上相对于伺服帧的长度和伺服模式的类型相关的量而移位。

10. 发明申请

WO2009153702A1 WORD SYNCHRONIZATION FOR SERVO READ SIGNALS IN TAPE DRIVES 审中-公开
标题翻译：用于伺服读取信号在磁带驱动器中的字同步
公开(公告)号：WO2009153702A1
公开(公告)日：2009-12-23
申请号：PCT/IB2009/052440
申请日：2009-06-09
申请人： INTERNATIONAL BUSINESS MACHINES CORPORATION , CHERUBINI, Giovanni , CIDECIYAN, Roy D. , ELEFTHERIOU, Evangelos S. , JELITTO, Jens
发明人： CHERUBINI, Giovanni , CIDECIYAN, Roy D. , ELEFTHERIOU, Evangelos S. , JELITTO, Jens
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： Methods and apparatus are provided for detecting L-bit sync words occurring at N-bit intervals in PPM-encoded servo pattern read signals read from magnetic tape (3) in tape drives (1). A soft output detector (11) processes the PPM-encoded servo pattern read signal to produce a series of soft output samples corresponding to respective bits encoded in the servo pattern. A sync word detector (12) then produces block correlation values for respective positions of a sliding L-sample block in the soft output sample series. The block correlation values are produced by calculating, at each block position, bit correlation values indicating correlation between respective samples and corresponding bits of the sync word, and summing each bit correlation value minus a predetermined function of the corresponding sample value. The sync word detector (12) then detects a sync word at the block position with the maximum block correlation value in an (N+L-1)-sample sequence of the soft output sample series.
摘要翻译：提供了用于检测在磁带驱动器（1）中从磁带（3）读取的PPM编码的伺服模式读取信号中以N位间隔发生的L位同步字的方法和装置。软输出检测器（11）处理PPM编码的伺服模式读取信号以产生对应于在伺服模式中编码的各个位的一系列软输出采样。同步字检测器（12）然后产生软输出采样序列中的滑动L样本块的相应位置的块相关值。通过在每个块位置计算指示各个采样和同步字的对应位之间的相关性并将每个位相关值减去相应采样值的预定函数的相加值来产生块相关值。然后，同步字检测器（12）在软输出采样序列的（N + L-1） - 采样序列中检测具有最大块相关值的块位置处的同步字。

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