公开(公告)号：EP2862170A4

公开(公告)日：2015-08-12

申请号：EP13806537

申请日：2013-06-18

Applicant: IBM

Inventor： PANTAZI ANGELIKI ,  BUI NHAN XUAN ,  JELITTO JENS

IPC: G11B5/584 ,  G11B5/008

CPC classification number: G11B5/584

公开(公告)号：JP2009095027A

公开(公告)日：2009-04-30

申请号：JP2008262279

申请日：2008-10-08

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： HUTCHINS ROBERT ALLEN ,  JELITTO JENS ,  OELCER SEDAT

IPC: H03L7/08 ,  G11B20/14 ,  G11B20/18 ,  H03L7/06

Abstract: PROBLEM TO BE SOLVED: To provide frequency error combination logic for a multi-channel data detection system with a phase locked loop for each channel.
SOLUTION: The frequency error combination logic 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.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为具有每个通道的锁相环的多通道数据检测系统提供频率误差组合逻辑。 解决方案：频率误差组合逻辑包括相对于每个通道接收频率误差信息; 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。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2009095028A

公开(公告)日：2009-04-30

申请号：JP2008262296

申请日：2008-10-08

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： HUTCHINS ROBERT ALLEN ,  JELITTO JENS ,  OELCER SEDAT

IPC: H03L7/091

Abstract: PROBLEM TO BE SOLVED: To provide phase-error combination logic for a multi-channel data detection system with a phase locked loop for each channel.
SOLUTION: The phase-error combination logic comprises receiving phase error information with respect to each channel; combination logic configured to combine the received phase error information and generate a combined phase error; and a phase-error output configured to apply the combined phase error to at least one channel phase locked loop. Additionally, error signal combination logic comprises receiving error information of a signal relevant to a phase locked loop with respect to each channel; combination logic configured to combine the received error signal information and generate a combined error signal, weighting the received error signal information from each channel, for example with reliability information. An error compensation output is configured to apply the combined, weighted error signal to at least one channel phase locked loop.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：为具有每个通道的锁相环的多通道数据检测系统提供相位误差组合逻辑。 解决方案：相位误差组合逻辑包括接收关于每个通道的相位误差信息; 组合逻辑，被配置为组合所接收的相位误差信息并产生组合的相位误差; 以及被配置为将组合的相位误差应用于至少一个通道锁相环的相位误差输出。 另外，误差信号组合逻辑包括相对于每个信道接收与锁相环相关的信号的误差信息; 组合逻辑，其被配置为组合所接收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信息进行加权。 误差补偿输出被配置为将组合的加权误差信号应用于至少一个通道锁相环。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：WO2014083508A3

公开(公告)日：2014-07-24

申请号：PCT/IB2013060436

申请日：2013-11-27

Applicant: IBM ,  IBM RES GMBH

Inventor： CHERUBINI GIOVANNI ,  ENGELEN JOHAN B C ,  FURRER SIMEON ,  JELITTO JENS ,  LANTZ MARK ALFRED

IPC: G11B5/584

CPC classification number: G11B5/584

Abstract: A tape storage medium comprises at least one servo band (SB) along a longitudinal extension (x) of the tape storage medium (TP) for supporting to determine positional information. The servo band (SB) comprises a first servo subband (SB1) extending along the longitudinal extension (x) of the tape storage medium (1) and a second servo subband (SB2) extending along the longitudinal extension (x) of the tape storage medium (TP) next to the first servo subband (SB1). The first servo subband (SB1) comprises a frame servo pattern containing a set of servo frames (FR), wherein each servo frame (FR) of the set comprises a first burst (A) comprising at least two servo stripes (SP1) inclined at a first angle ( α) with respect to a direction orthogonal to the longitudinal extension (x) of the tape medium (TP), followed by a second burst (B) comprising at least two servo stripes (SP2) inclined at a second angle (&bgr;) with respect to the direction orthogonal to the longitudinal extension (x) of the tape medium (TP), which second angle (α) is different from the first angle (&bgr;). The second servo subband (SB2) contains a set of servo tracks (STx) extending along the longitudinal extension (x) of the tape storage medium (TP) and arranged next to each other, wherein each servo track (STx) of the set contains a servo pattern of magnetic transitions representing a waveform when being read, and wherein the waveforms of adjacent servo tracks (STx) are orthogonal to each other.

Abstract translation: 磁带存储介质包括沿着磁带存储介质（TP）的纵向延伸（x）的至少一个伺服带（SB），用于支持确定位置信息。 伺服带（SB）包括沿带存储介质（1）的纵向延伸（x）延伸的第一伺服子带（SB1）和沿着带存储器（1）的纵向延伸（x）延伸的第二伺服子带 介质（TP）紧挨着第一伺服子带（SB1）。 第一伺服子带（SB1）包括含有一组伺服帧（FR）的帧伺服模式，其中该组的每个伺服帧（FR）包括第一脉冲串（A），该第一脉冲串包括至少两个伺服条纹（SP1） （TP）的与纵向延伸（x）正交的方向的第一角度（α），接着是包括以第二角度倾斜的至少两个伺服条纹（SP2）的第二脉冲（B）（ （α）与第一角度（β）不同的正交于带式介质（TP）的纵向延伸（x）的方向）。 第二伺服子频带（SB2）包含沿着磁带存储介质（TP）的纵向延伸（x）延伸并且彼此相邻排列的一组伺服磁道（STx），其中该组的每个伺服磁道（STx）包含 当读取时表示波形的磁转变的伺服模式，并且其中相邻伺服轨道（STx）的波形彼此正交。

公开(公告)号：WO2007051693A3

公开(公告)日：2007-06-28

申请号：PCT/EP2006067340

申请日：2006-10-12

Applicant: IBM ,  IBM UK ,  HUTCHINS ROBERT ALLEN ,  ELEFTHERIOU EVANGELOS ,  OELCER SEDAT ,  JELITTO JENS

Inventor： HUTCHINS ROBERT ALLEN ,  ELEFTHERIOU EVANGELOS ,  OELCER SEDAT ,  JELITTO JENS

IPC: G11B20/10 ,  H03H21/00 ,  H04L25/03

CPC classification number: G11B20/10009 ,  G11B20/10046 ,  G11B20/10175 ,  G11B20/10481 ,  H04L25/03019 ,  H04L2025/03484 ,  H04L2025/03681

Abstract: 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.

Abstract translation: 公开了一种使用泄漏进行自适应异步均衡的装置，系统和方法。 均衡器对来自对读取信号进行采样的延迟线和多个对应抽头系数的多个抽头信号的乘积进行求和，以在具有第一采样率的异步时域中形成均衡的信号。 泄漏功能模块计算异步时域中每个抽头系数的泄漏函数。 适配模块将每个抽头系数适配为每个抽头系数的泄漏函数，用于针对每个抽头系数的与信号相关的更新函数相加。

公开(公告)号：WO2009153740A3

公开(公告)日：2010-02-25

申请号：PCT/IB2009052577

申请日：2009-06-17

Applicant: IBM ,  CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK A

Inventor： CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK A

IPC: G11B5/58 ,  G11B15/43

CPC classification number: G11B5/58 ,  G11B5/596 ,  G11B15/093 ,  G11B15/43

Abstract: Servo control methods and apparatus are provided for a tape drive (1) where a read/write head (2) reads and writes data on magnetic tape (3) with at least one servo track for providing transversal position information. At least two servo readers (S) are associated with the read/write head (2), each arranged for reading a said servo track during read/write operations. The servo readers (S) are operative concurrently to generate respective servo read signals (r). A position estimator (8) processes each servo read signal (r) to generate a series of position values, corresponding to respective time instants, indicative of transversal position of the associated servo reader (S). A servo controller (10) calculates from the position values and time instants a skew value (?), indicative of tape skew relative to the read/write head (2), and a tension variation value (AT) indicative of variation of tape tension from a reference value. The servo controller (10) is adapted to account for cross-coupling between tape skew and tension variation in the joint calculation of the skew and tension variation values. Where three servo readers (S) are operative concurrently, the servo controller (10) can be adapted to account for time dependency of tape skew and tension variation and to calculate respective time derivatives (?\ AT') for the skew and tension variation values (?, AT). The calculated values can then be used to make compensatory adjustments to tape tension and tape skew relative to the read/write head (2).

Abstract translation: 为磁带驱动器（1）提供伺服控制方法和装置，其中读/写磁头（2）用至少一个用于提供横向位置信息的伺服磁道读取和写入磁带（3）上的数据。 至少两个伺服读取器（S）与读/写头（2）相关联，每个伺服读取器（S）被布置用于在读/写操作期间读取所述伺服轨道。 伺服读取器（S）同时工作以产生相应的伺服读取信号（r）。 位置估计器（8）处理每个伺服读取信号（r）以产生指示相关伺服读取器（S）的横向位置的对应于各个时刻的一系列位置值。 伺服控制器（10）根据位置值和时刻计算指示相对于读/写头（2）的磁带偏斜的偏斜值（θ）和指示磁带张力变化的张力变化值（AT） 从参考值。 伺服控制器（10）适于考虑歪斜和张力变化值的联合计算中的带偏斜和张力变化之间的交叉耦合。 在三个伺服读取器（S）同时操作的情况下，伺服控制器（10）可以适应于考虑到磁带歪斜和张力变化的时间依赖性，并且计算歪斜和张力变化值的相应时间导数（Δ\ AT'） （？， 在）。 然后，计算的值可用于对磁带张力和相对于读/写磁头（2）的磁带歪斜进行补偿性调整。

公开(公告)号：WO2004004194A8

公开(公告)日：2004-04-08

申请号：PCT/IB0302784

申请日：2003-06-17

Applicant: IBM ,  JELITTO JENS ,  NOLL BARRETO ANDRE ,  TRUONG HONG LINH

Inventor： JELITTO JENS ,  NOLL BARRETO ANDRE ,  TRUONG HONG LINH

IPC: H04L1/16 ,  H04L1/00 ,  H04L29/06 ,  H04L29/08

CPC classification number: H04L1/0002 ,  H04L1/0007 ,  H04L1/0026 ,  Y02D50/10

Abstract: The present invention discloses an apparatus and method for adapting a transmission parameter in a transmitting node of a data communication system to the current link quality of a data communication channel. The adapted transmission parameter is selected by the transmitting node from a set of transmission parameters in dependence on a number of successful transmissions. The number of successful transmissions is compared in the transmitting node against one of a first threshold value corresponding to a first state of the transmitting node and a second threshold value corresponding to a second state of the transmitting node. The method comprises in the transmitting node the steps of (a) counting the number of successful transmissions; (b) selecting the adapted transmission parameter (bl) in response to the number of successful transmissions equaling or exceeding the first threshold value when the transmitting node is in the first state, and (b2) in response to the number of successful transmissions equaling or exceeding the second threshold value when the transmitting node is in the second state; and in dependence of the result of a following transmission, operating the transmitting node in one of the first state and the second state.

Abstract translation: 本发明公开了一种用于使数据通信系统的发送节点中的发送参数适应数据通信信道的当前链路质量的设备和方法。 取决于成功传输的数量，由传输节点从一组传输参数中选择适配的传输参数。 在传输节点中比较成功传输的次数与对应于传输节点的第一状态的第一阈值和对应于传输节点的第二状态的第二阈值中的一个。 该方法在传输节点中包括以下步骤：（a）对成功传输的数量进行计数; （b）响应于当发送节点处于第一状态时成功发送的数量等于或超过第一阈值，选择适配的发送参数（b1），以及（b2）响应于成功发送的数量等于或 当发送节点处于第二状态时超过第二阈值; 并且根据后续传输的结果，以第一状态和第二状态之一操作发送节点。

公开(公告)号：WO2011104050A2

公开(公告)日：2011-09-01

申请号：PCT/EP2011050674

申请日：2011-01-19

Applicant: IBM ,  CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  HUTCHINS ROBERT ALLEN

Inventor： CHERUBINI GIOVANNI ,  JELITTO JENS ,  LANTZ MARK ALFRED ,  HUTCHINS ROBERT ALLEN

CPC classification number: G11B5/584 ,  G11B5/09

Abstract: Timing based servo bursts of servo frames, in which the frames are arranged to be symmetric with the same number of servo stripes in each burst of a frame, are synchronized by shifting selected bits. For example, servo frames are arranged with four servo bursts with an equal number of servo stripes in each burst, the servo frames comprising two symmetric sub-frames, each sub-frame comprising two bursts of servo stripes that are parallel to each other within a burst, and the bursts are non-parallel with respect to each other; each servo burst is arranged to comprise at least one reference servo stripe; and each servo burst is arranged to comprise at least one shifted servo stripe, wherein the shift is in the same longitudinal direction with respect to at least one reference servo stripe for each burst of a frame and the opposite longitudinal direction for bursts of sequentially adjacent frames.

Abstract translation: 伺服帧的基于时序的伺服脉冲串通过移位所选位来同步，其中帧被布置为在帧的每个突发中具有相同数量的伺服条带对称。 例如，伺服帧被布置成具有在每个突发中具有相等数量的伺服条带的四个伺服脉冲串，伺服帧包括两个对称子帧，每个子帧包括在一个内部的彼此平行的两个脉冲串的伺服条带 突发，并且突发是相互不平行的; 每个伺服脉冲串被布置成包括至少一个参考伺服条纹; 并且每个伺服脉冲串被布置成包括至少一个移位的伺服条带，其中相对于帧的每个脉冲串相对于至少一个参考伺服条带的移位在相同的纵向方向上，并且相反的纵向方向用于顺序相邻帧的突发 。

公开(公告)号：WO2009136374A3

公开(公告)日：2009-12-30

申请号：PCT/IB2009051882

申请日：2009-05-07

Applicant: IBM ,  CHERUBINI GIOVANNI ,  CIDECIYAN ROY D ,  ELEFTHERIOU EVANGELOS S ,  JELITTO JENS ,  LANTZ MARK A

Inventor： CHERUBINI GIOVANNI ,  CIDECIYAN ROY D ,  ELEFTHERIOU EVANGELOS S ,  JELITTO JENS ,  LANTZ MARK A

IPC: G11B5/584 ,  G11B21/10

CPC classification number: G11B5/584

Abstract: 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.

Abstract translation: 伺服写入头被提供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上基本均匀地间隔开。 另外，所有相邻的各个伺服带的伺服图案在纵向上相对于彼此移位与伺服帧的长度和伺服图案的类型有关的量。

公开(公告)号：WO2004004194A2

公开(公告)日：2004-01-08

申请号：PCT/IB0302784

申请日：2003-06-17

Applicant: IBM ,  JELITTO JENS ,  NOLL BARRETO ANDRE ,  TRUONG HONG LINH

Inventor： JELITTO JENS ,  NOLL BARRETO ANDRE ,  TRUONG HONG LINH

IPC: H04L1/16 ,  H04L1/00 ,  H04L29/06 ,  H04L29/08

CPC classification number: H04L1/0002 ,  H04L1/0007 ,  H04L1/0026 ,  Y02D50/10

Abstract: The present invention discloses an apparatus and method for adapting a transmission parameter in a transmitting node of a data communication system to the current link quality of a data communication channel. The adapted transmission parameter is selected by the transmitting node from a set of transmission parameters in dependence on a number of successful transmissions. The number of successful transmissions is compared in the transmitting node against one of a first threshold value corresponding to a first state of the transmitting node and a second threshold value corresponding to a second state of the transmitting node. The method comprises in the transmitting node the steps of (a) counting the number of successful transmissions; (b) selecting the adapted transmission parameter (bl) in response to the number of successful transmissions equaling or exceeding the first threshold value when the transmitting node is in the first state, and (b2) in response to the number of successful transmissions equaling or exceeding the second threshold value when the transmitting node is in the second state; and in dependence of the result of a following transmission, operating the transmitting node in one of the first state and the second state.