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1. 发明申请

US20090323510A1 Modulation and demodulation of OFDM signals 审中-公开
标题翻译： OFDM信号的调制解调
公开(公告)号：US20090323510A1
公开(公告)日：2009-12-31
申请号：US10585390
申请日：2004-11-19
申请人： Simeon Furrer , Jens Jelitto , Wolfgang Schott , Beat Weiss
发明人： Simeon Furrer , Jens Jelitto , Wolfgang Schott , Beat Weiss
IPC分类号： H04J11/00 , H04K1/10
CPC分类号： H04L27/2634 , H04L27/265
摘要： The invention relates to a method for modulating sub-carrier symbols to an intermediate-frequency OFDM signal having even and odd samples, including following steps: transforming a number N of the sub-carrier symbols to pre-processed sub-carrier symbols; performing a complex inverse discrete Fourier transformation (IDFT) on the pre-processed sub-carrier symbols to generate complex output symbols; and transforming the complex output symbols to the intermediate-frequency OFDM signal, wherein the sub-carrier symbols are transformed so that the even and odd samples of the intermediate-frequency OFDM signal are given by real and imaginary parts of the complex output symbols.
摘要翻译：本发明涉及一种用于将子载波符号调制为具有偶数和奇数样本的中频OFDM信号的方法，包括以下步骤：将N个子载波符号变换为预处理的子载波符号; 对预处理的子载波符号执行复数离散傅立叶逆变换（IDFT）以产生复数输出符号; 并将所述复数输出符号变换为所述中频OFDM信号，其中对所述子载波符号进行变换，使得所述中频OFDM信号的偶数和奇数样本由所述复数输出符号的实部和虚部给出。

2. 发明授权

US07349462B2 Acquisition and adjustment of gain, receiver clock frequency, and symbol timing in an OFDM radio receiver 失效
标题翻译：在OFDM无线电接收机中获取和调整增益，接收机时钟频率和符号定时
公开(公告)号：US07349462B2
公开(公告)日：2008-03-25
申请号：US10738693
申请日：2003-12-17
申请人： Wolfgang Schott , Pedro E. Coronel , Simeon Furrer , Jens Jelitto , Beat Weiss , Dietrich Maiwald
发明人： Wolfgang Schott , Pedro E. Coronel , Simeon Furrer , Jens Jelitto , Beat Weiss , Dietrich Maiwald
IPC分类号： H04B1/69
CPC分类号： H04L27/2675 , H04L27/2657 , H04L27/2662 , H04L27/3809 , H04L2025/03522
摘要： The present invention discloses a method and apparatus for adjusting gain setting, receiver clock frequency, and symbol timing in an OFDM radio receiver. The method is based on the reception of a preamble with known periodic training sequences transmitted prior to user data over the radio channel. By computing a periodicity metric, an inner receiver detects the presence of periodic signals in the received data sequence, provides means to set the Variable Gain Amplifier VGA gain in the radio frontend, and estimates frequency offsets between the transmit and receive clock. Matched filters are used to determine the symbol timing. A finite-state-machine schedules various tasks during the receiver startup.
摘要翻译：本发明公开了一种用于在OFDM无线电接收机中调整增益设置，接收机时钟频率和符号定时的方法和装置。该方法基于在通过无线电信道的用户数据之前发送的已知周期性训练序列的前同步码的接收。通过计算周期性度量，内部接收机检测接收数据序列中周期信号的存在，提供在无线电前端设置可变增益放大器VGA增益的装置，并估计发射和接收时钟之间的频率偏移。匹配滤波器用于确定符号定时。有限状态机在接收机启动期间安排各种任务。

3. 发明授权

US08643975B2 Method and apparatus for operating a storage device 失效
标题翻译：用于操作存储设备的方法和设备
公开(公告)号：US08643975B2
公开(公告)日：2014-02-04
申请号：US13517434
申请日：2010-12-17
申请人： Giovanni Cherubini , Jens Jelitto , Angeliki Pantazi
发明人： Giovanni Cherubini , Jens Jelitto , Angeliki Pantazi
IPC分类号： G11B20/20
CPC分类号： G11B5/56
摘要： Method for operating a storage device with a tape and a head which is operable to read and/or write data from and respectively to the tape. The tape is moveable in a predetermined longitudinal direction. At least two consecutive current lateral tape positions of the tape with respect to a predetermined reference point are determined at a predetermined longitudinal capture position. A tape skew of the tape is determined dependent on the at least two determined lateral positions. The tape skew represents an angle between a current tape motion direction of the tape and the longitudinal direction. A skew control signal is determined dependent on the determined tape skew. A rotational head position of the head is controlled dependent on the skew control signal to align the head to the current tape motion direction in such a way that the head is operable to read and/or write data.
摘要翻译：用于操作具有磁带和磁头的存储设备的方法，其可操作以从磁带读取和/或写入数据。带可以在预定的纵向移动。在预定的纵向捕获位置处确定带相对于预定参考点的至少两个连续的当前横向带位置。取决于至少两个确定的横向位置来确定带的带偏移。带偏斜表示带的当前带运动方向和纵向方向之间的角度。取决于确定的带偏斜来确定偏斜控制信号。根据歪斜控制信号控制头部的旋转头部位置，以使头部与当前的带运动方向对准，使得头部可操作以读取和/或写入数据。

4. 发明授权

US08587892B2 Method and apparatus for operating a storage device 失效
标题翻译：用于操作存储设备的方法和设备
公开(公告)号：US08587892B2
公开(公告)日：2013-11-19
申请号：US13575508
申请日：2011-01-27
申请人： Evangelos S. Eleftheriou , Walter Haeberle , Jens Jelitto , Angeliki Pantazi
发明人： Evangelos S. Eleftheriou , Walter Haeberle , Jens Jelitto , Angeliki Pantazi
IPC分类号： G11B5/584
CPC分类号： G11B5/584
摘要： Method for operating a storage device with a tape and a head wherein the head comprises a first and a second read element. Each read element is operable to detect servo-pattern of a particular servo band. The first and the second read element are arranged such that the tape at first passes one of both read elements and subsequently passes the other of both read elements when the tape moves in a predetermined longitudinal direction. A tape transport direction of the tape along the longitudinal direction is determined. The first read element is selected dependent on the determined tape transport direction, when the determined tape transport direction represents a direction where the tape at first passes the first read element and subsequently the second read element. Otherwise the second read element is selected. A position error signal is determined dependent on the selected read element.
摘要翻译：用于操作具有带和头的存储设备的方法，其中所述头部包括第一和第二读取元件。每个读取元件可操作以检测特定伺服带的伺服图案。第一和第二读取元件被布置成使得当磁带沿预定的纵向方向移动时，磁带首先通过两个读取元件中的一个并随后通过两个读取元件中的另一个元件。确定带沿着纵向的带传送方向。当所确定的磁带传送方向表示磁带首先通过第一读取单元的方向和随后的第二读取单元的方向时，第一读取单元根据确定的磁带传送方向来选择。否则选择第二个读取元素。取决于所选择的读取元素来确定位置误差信号。

5. 发明申请

US20130088794A1 ROBUST METRIC COMPUTATION OF LONGITUDINAL POSITION (LPOS) DATA SYMBOL DETECTION 有权
标题翻译：长距离计量（LPOS）数据符号检测
公开(公告)号：US20130088794A1
公开(公告)日：2013-04-11
申请号：US13267837
申请日：2011-10-06
申请人： Giovanni Cherubini , Jens Jelitto , Robert A. Hutchins
发明人： Giovanni Cherubini , Jens Jelitto , Robert A. Hutchins
IPC分类号： G11B5/58
CPC分类号： G11B20/1202 , G11B5/584 , G11B20/10231 , G11B20/10287 , G11B20/1201 , G11B2020/1281 , G11B2220/90 , G11B2220/93 , G11B2220/956
摘要： In one embodiment, a tape drive system includes a magnetic head having a servo sensor for sensing a defined servo track of a magnetic tape and configured to read servo pulses from servo bursts of the servo track while the magnetic tape is moving past the magnetic head with the servo bursts representing an encoded data symbol, an analog-to-digital converter configured to provide a sequence of samples of the readback servo signal, a digital correlator configured to compute a correlation signal between the sequence and a reference waveform, a timing reference module configured to provide a reference timing model having interpolation instants to the digital correlator, a correlation interpolator configured to interpolate the correlation signal at the interpolation instants and compute a longitudinal position (LPOS) detection metric, and an LPOS detector configured to decode the encoded data symbol of the servo bursts using the computed LPOS detection metric.
摘要翻译：在一个实施例中，磁带驱动系统包括具有伺服传感器的磁头，该伺服传感器用于感测磁带的定义的伺服磁道并且被配置为在磁带通过磁头移动经过磁头的同时从伺服磁道的伺服脉冲串读取伺服脉冲，表示编码数据符号的伺服突发，被配置为提供所述回读伺服信号的采样序列的模数转换器，被配置为计算所述序列与参考波形之间的相关信号的数字相关器，定时参考模块被配置为向所述数字相关器提供具有内插时刻的参考定时模型，相关内插器，被配置为在所述内插时刻内插所述相关信号并计算纵向位置（LPOS）检测度量，以及LPOS检测器，被配置为对所述编码数据符号的伺服脉冲串使用计算的LPOS检测度量。

6. 发明授权

US08139312B2 Timing alternative intervals within a timing based servo band 有权
标题翻译：基于定时的伺服带内的定时替代间隔
公开(公告)号：US08139312B2
公开(公告)日：2012-03-20
申请号：US12716037
申请日：2010-03-02
申请人： Nhan Xuan Bui , Giovanni Cherubini , Reed Alan Hancock , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Giovanni Cherubini , Reed Alan Hancock , Jens Jelitto , Kazuhiro Tsuruta
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。伺服带在线性带的顺序相邻的子帧中以非平行的伺服条形序列突发。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。

7. 发明授权

US08107186B2 Determination of timing based servo pattern type 失效
标题翻译：基于定时的伺服模式类型的确定
公开(公告)号：US08107186B2
公开(公告)日：2012-01-31
申请号：US12776944
申请日：2010-05-10
申请人： Nhan Xuan Bui , Giovanni Cherubini , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan Xuan Bui , Giovanni Cherubini , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B21/02 , G11B5/584 , G11B5/09
CPC分类号： G11B5/00878 , G11B5/584 , G11B20/1403 , G11B2020/1484 , G11B2220/90
摘要： In a magnetic tape drive having a servo read system with at least one read head, the system configured to read servo pattern information as a magnetic tape is moved longitudinally with respect to the at least one read head, the servo pattern comprising a timing-based servo pattern comprising an even number of bursts of sloped magnetic stripes, adjacent bursts oppositely sloped, alternate bursts identically sloped, an embodiment of a method determines the time between detection from the read head of a same stripe of alternate bursts of a pattern; determines the time between detection from the read head of stripes of a burst of a pattern; and determines a ratio of the determined times. The ratio is compared to a threshold, wherein the threshold comprises a differentiation between different servo pattern types.
摘要翻译：在具有至少一个读取头的伺服读取系统的磁带驱动器中，配置为读取作为磁带的伺服模式信息的系统相对于至少一个读取头纵向移动，伺服模式包括基于时序的伺服模式包括偶数数量的倾斜磁条脉冲串，相邻突发脉冲相对倾斜，相同倾斜的交替脉冲串，方法的实施例确定从图形的相同条纹的同一条带的读出头检测之间的时间; 确定从图案的突发的条带的读取头检测之间的时间; 并确定所确定的时间的比率。该比率与阈值进行比较，其中阈值包括不同伺服模式类型之间的区分。

8. 发明授权

US07957088B1 Track compensation and skew compensation for drives having flangeless rollers and systems thereof 有权
标题翻译：具有无法兰滚子及其系统的驱动器的履带补偿和偏斜补偿
公开(公告)号：US07957088B1
公开(公告)日：2011-06-07
申请号：US12716200
申请日：2010-03-02
申请人： Nhan X. Bui , Giovanni Cherubini , Jens Jelitto , Kazuhiro Tsuruta
发明人： Nhan X. Bui , Giovanni Cherubini , Jens Jelitto , Kazuhiro Tsuruta
IPC分类号： G11B5/58
CPC分类号： G11B5/584
摘要： According to one embodiment, a system includes a plurality of synchronous servo channels, where each channel receives a signal from a servo reader of a magnetic head. The system also includes logic for estimating a tape velocity, logic for determining a first and second time instant representing a time at which a flag is generated by a related servo channel, logic for determining a first and second correction term representing a time difference between a time at which a peak of a correlation signal and a time at which the flag occur, logic for calculating a skew error estimate based on a reference shift value associated with a servo band pair being spanned by a head module, and logic for applying a control signal including a skew correction that corresponds to the calculated skew error estimate to the skew-following loop. Other systems and methods are disclosed as well.
摘要翻译：根据一个实施例，系统包括多个同步伺服通道，其中每个通道接收来自磁头的伺服读取器的信号。该系统还包括用于估计磁带速度的逻辑，用于确定表示由相关伺服通道产生标志的时间的第一和第二时刻的逻辑，用于确定表示第一和第二校正项的逻辑，相关信号的峰值和标志出现的时间的时间，用于基于与头模块跨越的伺服带对相关联的参考移位值计算偏斜误差估计的逻辑，以及用于施加控制的逻辑信号包括对应于所计算的偏斜误差估计到偏斜跟踪环路的偏斜校正。还公开了其它系统和方法。

9. 发明授权

US07777980B2 Multi-channel data detection phase locked loop error combination logic 失效
标题翻译：多通道数据检测锁相环路错误组合逻辑
公开(公告)号：US07777980B2
公开(公告)日：2010-08-17
申请号：US11870853
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： Phase-error combination for a multi-channel data detection system with a phase locked loop for each channel, 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 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.
摘要翻译：具有用于每个通道的锁相环的多通道数据检测系统的相位误差组合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，例如对可靠性信息加权来自每个信道的接收到的误差信号信息。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。

10. 发明申请

US20090097606A1 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相位锁定环路频率误差组合
公开(公告)号：US20090097606A1
公开(公告)日：2009-04-16
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： H03D3/24
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。

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