公开(公告)号：US07000168B2

公开(公告)日：2006-02-14

申请号：US10093926

申请日：2002-03-08

申请人： Erozan M. Kurtas ,  Alexander Vasilievich Kuznetsov ,  Bane Vasic

发明人： Erozan M. Kurtas ,  Alexander Vasilievich Kuznetsov ,  Bane Vasic

IPC分类号： H03M13/00

CPC分类号： H03M13/116 ,  H03M13/05 ,  H03M13/118 ,  H03M13/1185 ,  H03M13/255 ,  H03M13/6561

摘要： A method of generating low density parity check codes for encoding data includes constructing a parity check matrix H from balanced incomplete block design (BIBD) in which a plurality B-sets which define the matrix have no more than one intersection point. The parity bits are then generated as a function of the constructed parity check matrix H.

公开(公告)号：US06909385B2

公开(公告)日：2005-06-21

申请号：US10084040

申请日：2002-02-27

申请人： Bane Vasic ,  Erozan M. Kurtas

发明人： Bane Vasic ,  Erozan M. Kurtas

IPC分类号： G11B20/14 ,  H03M5/14 ,  H03M7/46 ,  H03M7/20

CPC分类号： G11B20/1426 ,  G11B2020/1438 ,  G11B2020/1457 ,  H03M5/145 ,  H03M7/46

摘要： A method of encoding digital information in order to suppress dc includes the steps of receiving a sequence of m message bits of a message word, and mapping the sequence of m message bits of the message word to a codeword, of length n bits, generated from the m message bits using algebraic operations. Multiple codeword candidates are generated from the m message bits using the algebraic operations to combine the m message bits with different periodic scrambling sequences. One of the codeword candidates is selected for mapping based upon an optimizing criteria. Second order digital sum sequences, corresponding to each of the plurality of codeword candidates, can be used as the optimizing criteria to select the codeword.

摘要翻译： 编码数字信息以便抑制直流的方法包括以下步骤：接收消息字的m个消息比特序列，并将消息字的m个消息比特的序列映射到长度为n比特的码字，从 m个消息位使用代数运算。 使用代数运算从m个消息比特生成多个码字候选，以将m个消息比特与不同的周期性加扰序列相组合。 基于优化标准来选择码字候选中的一个用于映射。 对应于多个码字候选中的每一个的二阶数字和序列可以用作选择码字的优化标准。

公开(公告)号：US07889823B2

公开(公告)日：2011-02-15

申请号：US11070917

申请日：2005-03-03

申请人： Xueshi Yang ,  Mehmet F. Erden ,  Erozan M. Kurtas

发明人： Xueshi Yang ,  Mehmet F. Erden ,  Erozan M. Kurtas

IPC分类号： H04B1/10

CPC分类号： H04L7/0054 ,  G11B20/10009 ,  G11B20/10037 ,  G11B20/1403 ,  H04L7/0029 ,  H04L7/0062

摘要： A parallel channel timing recovery circuit. The parallel timing recovery circuit comprises multiple prefilters receiving parallel channel outputs and providing prefilter outputs. Multiple sampling filters receive the prefilter outputs and provide multiple discrete time signal samples. A self-timing circuit has multiple inputs receiving the multiple discrete time signal samples. The self-timing circuit provides a sampling control output to the sampling filters. The sampling control output is based on a composite of the multiple discrete time signal samples. Each of the sampling filters generates a discrete time signal sample based on the sampling control output and the prefilter outputs.

摘要翻译： 并行通道定时恢复电路。 并行定时恢复电路包括多个预滤波器，其接收并行通道输出并提供预滤波器输出。 多个采样滤波器接收预滤波器输出并提供多个离散时间信号采样。 自定时电路具有接收多个离散时间信号样本的多个输入。 自定时电路为采样滤波器提供采样控制输出。 采样控制输出基于多个离散时间信号样本的复合。 每个采样滤波器基于采样控制输出和预滤波器输出产生离散时间信号采样。

公开(公告)号：US07265937B1

公开(公告)日：2007-09-04

申请号：US11450208

申请日：2006-06-09

申请人： Mehmet F. Erden ,  Mark D. Bedillion ,  Erozan M. Kurtas ,  Xueshi Yang ,  Darren W. Karns

发明人： Mehmet F. Erden ,  Mark D. Bedillion ,  Erozan M. Kurtas ,  Xueshi Yang ,  Darren W. Karns

IPC分类号： G11B5/596

CPC分类号： G11B5/59605 ,  G11B5/59688

摘要： A data storage system in which multiple readback signals are resolved is provided. The data storage system includes a data storage medium configured to store servo marks and data marks. The data storage medium has tracks that are divided into sectors. An array of heads is configured to interact with the data storage medium. A demodulation circuit receives servo signals obtained by at least some heads of the array of heads and computes a resultant servo signal, which is used to adjust a position of the array of heads over the storage medium.

摘要翻译： 提供多个回读信号被解析的数据存储系统。 数据存储系统包括配置为存储伺服标记和数据标记的数据存储介质。 数据存储介质具有被划分成扇区的轨迹。 头阵列被配置为与数据存储介质交互。 解调电路接收由头阵列的至少一些头部获得的伺服信号，并计算合成的伺服信号，该伺服信号用于调整存储介质上的头阵列的位置。

公开(公告)号：US06754015B2

公开(公告)日：2004-06-22

申请号：US10224825

申请日：2002-08-21

申请人： Mehmet F. Erden ,  Erozan M. Kurtas

发明人： Mehmet F. Erden ,  Erozan M. Kurtas

IPC分类号： G11B502

CPC分类号： G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/6076 ,  G11B2005/001 ,  G11B2005/0016

摘要： A disc drive data recovery system for recovering data from a magnetic disc having asperities provided. Readback data follows a nominal readback path and a thermal asperity cancellation readback path. A thermal asperity detector detects a thermal asperity in the readback signal and responsively selects the readback signal which follows the thermal asperity cancellation readback path.

摘要翻译： 一种用于从具有凹凸的磁盘中恢复数据的盘驱动器数据恢复系统。 回读数据遵循标称回读路径和热绝对消除回读路径。 热敏不均匀检测器检测回读信号中的热不均匀性，并响应于选择跟随热绝对消除回读路径的回读信号。