专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

91. 发明授权

US07596176B2 Apparatus, system, and method for adaptive asynchronous equalization using leakage 有权
标题翻译：使用泄漏进行自适应异步均衡的装置，系统和方法
公开(公告)号：US07596176B2
公开(公告)日：2009-09-29
申请号：US11263189
申请日：2005-10-31
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： H03H7/30
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相加，以在具有第一采样率的异步时域中形成均衡信号。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。

92. 发明申请

US20090195909A1 GAIN CONTROL FOR DATA-DEPENDENT DETECTION IN MAGNETIC STORAGE READ CHANNELS 有权
标题翻译：在磁存储读取通道中数据相关检测的增益控制
公开(公告)号：US20090195909A1
公开(公告)日：2009-08-06
申请号：US12027258
申请日：2008-02-06
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： G11B21/02
CPC分类号： G11B20/10009 , G11B20/10027 , G11B20/10037 , G11B20/24 , G11B2220/2516
摘要： Method, apparatus and computer program product adjust gain in a read channel of a magnetic media data storage device. A digital signal sample having a data-dependent noise component is received. A gain value, stored in a location in a gain table, is selected in a data-dependent manner. The gain of the signal sample is adjusted in response to the selected gain value. A bit pattern is detected from the gain-adjusted signal sample and a data output signal is output based upon the detected bit pattern.
摘要翻译：方法，装置和计算机程序产品调整磁介质数据存储装置的读通道中的增益。接收具有数据相关噪声分量的数字信号采样。以数据相关的方式选择存储在增益表中的位置的增益值。响应于所选择的增益值来调整信号采样的增益。从增益调整信号采样中检测位模式，并且基于检测到的位模式输出数据输出信号。

93. 发明申请

US20090097604A1 METHODS FOR MULTI-CHANNEL DATA DETECTION PHASE LOCKED LOOP ERROR COMBINATION 失效
标题翻译：多通道数据检测方法锁相环路错误组合方法
公开(公告)号：US20090097604A1
公开(公告)日：2009-04-16
申请号：US11870885
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 , H04L27/00
CPC分类号： H04L7/0029 , G11B20/10009 , G11B20/10222 , G11B20/10425 , G11B2220/90 , H03L7/07 , H03L7/087 , H03L7/091 , H04L7/0025 , H04L7/0054
摘要： Phase-error combination methods 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; combining the received phase error information and generating a combined phase error; and applying the combined phase error to at least one channel phase locked loop. Error signal combination comprises receiving 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, weighted error signal is applied 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方法包括接收关于每个通道的相位误差信息; 组合所接收的相位误差信息并产生组合相位误差; 以及将组合的相位误差应用于至少一个通道锁相环。误差信号组合包括相对于每个通道接收与锁相环相关的信号的误差信息; 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。组合的加权误差信号被施加到至少一个通道锁相环。

94. 发明申请

US20090097535A1 MULTI-CHANNEL DATA DETECTION PHASE LOCKED LOOP ERROR COMBINATION LOGIC 失效
标题翻译：多通道数据检测相位锁定环路错误组合逻辑
公开(公告)号：US20090097535A1
公开(公告)日：2009-04-16
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： H04Q1/20
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。

95. 发明授权

US07480327B2 System and method for controlling line driver power in digital subscriber line modems 有权
标题翻译：用于数字用户线路调制解调器控制线路驱动器功率的系统和方法
公开(公告)号：US07480327B2
公开(公告)日：2009-01-20
申请号：US11945213
申请日：2007-11-26
申请人： Gordon Taylor Davis , Jeffrey Haskell Derby , Evangelos Stavros Eleftheriou , Sedat Oelcer , Malcolm Scott Ware
发明人： Gordon Taylor Davis , Jeffrey Haskell Derby , Evangelos Stavros Eleftheriou , Sedat Oelcer , Malcolm Scott Ware
IPC分类号： H04B1/38 , H04L5/16
CPC分类号： H04L25/028 , H04L27/2626 , H04M11/062 , Y02D50/44
摘要： A method for operating plurality of DSL modem transmitters integrated within a circuit card. The method includes each DSL modem transmitter: generating a full power physical frame when the DSL modem transmitter is provided with data to transmit; generating a low power physical frame having a control channel signal component and no data; and selecting between the full power physical frame and the low power physical frame for transmission from the DSL modem transmitter, wherein selection of the low power physical frame for transmission from the DSL modem transmitter is based only on the DSL modem transmitter having no data to transmit. The method further includes limiting aggregate flow of data to the plurality of DSL modem transmitters such that a total power required by the plurality of DSL modem transmitters is held below a predefined target power level.
摘要翻译：一种用于操作集成在电路卡内的多个DSL调制解调器发射机的方法。该方法包括每个DSL调制解调器发射机：当DSL调制解调器发射机被提供有要传输的数据时，产生全功率物理帧; 生成具有控制信道信号分量且不存在数据的低功率物理帧; 并且在全功率物理帧和低功率物理帧之间选择用于从DSL调制解调器发射机发射，其中，用于从DSL调制解调器发射机传输的低功率物理帧的选择仅基于没有数据传输的DSL调制解调器发射机。该方法还包括限制数据到多个DSL调制解调器发射机的汇总流量，使得多个DSL调制解调器发射机所需的总功率保持在预定义的目标功率电平以下。

96. 发明申请

US20080253012A1 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：磁带读取通道信号值开发使用PRML VITERBI检测器的路径存储器的中间位
公开(公告)号：US20080253012A1
公开(公告)日：2008-10-16
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。

97. 发明授权

US07428116B2 Method for a cyclic dibit response estimation in a media system using a data set separator sequence 失效
标题翻译：在使用数据集分隔符序列的媒体系统中进行循环双位响应估计的方法
公开(公告)号：US07428116B2
公开(公告)日：2008-09-23
申请号：US11122680
申请日：2005-05-05
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： G11B20/10 , G11B20/10009 , G11B20/10046
摘要： A dibit response estimation generator receives a DSS sequence and a DSS readback sequence, which is a function of a channel processing of the DSS sequence by a read channel. The generator generates a cyclic dibit response vector as a function of the DSS sequence and the DSS readback sequence. The generator further generates an error signal as a function of a comparison of the DSS readback sequence and a filtering of the DSS sequence based on the cyclic dibit response vector. An unacceptable error signal indicates a need to adjust the cyclic dibit response vector to yield an acceptable comparison of the DSS readback sequence and the filtering of the DSS sequence based on the cyclic dibit response vector.
摘要翻译：双向响应估计生成器接收DSS序列和DSS回读序列，DSS序列是通过读取通道的DSS序列的信道处理的函数。发生器产生作为DSS序列和DSS回读序列的函数的循环双位响应向量。发生器还根据DSS回读序列的比较和基于循环双位响应向量的DSS序列的滤波产生误差信号。不可接受的误差信号表示需要调整循环双位响应向量，以产生DSS回读序列的可接受比较和基于循环双位响应向量的DSS序列的过滤。

98. 发明授权

US07359135B2 Dynamically adapting a magnetic tape read channel equalizer 失效
标题翻译：动态调整磁带读通道均衡器
公开(公告)号：US07359135B2
公开(公告)日：2008-04-15
申请号：US11733934
申请日：2007-04-11
申请人： Robert Allen Hutchins , Glen Alan Jaquette , Evangelos S. Eleftheriou , Sedat Oelcer
发明人： Robert Allen Hutchins , Glen Alan Jaquette , Evangelos S. Eleftheriou , Sedat Oelcer
IPC分类号： G11B5/35
CPC分类号： G11B20/10 , G11B5/02
摘要： A read channel equalizer of a magnetic tape drive which equalizes digitally sampled magnetic signals detected by a read head is dynamically adapted. A detector of equalizer dynamic adaptation logic compares equalizer output signals to desired values that are based on the decoding scheme (such as +2, 0 and −2 for PR4) to sense equalizer output signals that are offset from at least one desired value, and signals the fact of each offset and it polarity as amplitude independent error signals. The signaled sensed amplitude independent error signals are fed back to adjustable taps of the equalizer. The simplified error signals thus avoid complex calculations of waveform errors, such as least mean square calculations. The error signals may be weighted and may be adjusted to align synchronously provided error signals with asynchronous taps of the equalizer.
摘要翻译：磁头驱动器的读取通道均衡器，其均衡由读取头检测到的数字采样磁信号。均衡器动态适配逻辑的检测器将均衡器输出信号与基于解码方案（例如PR4的+2,0和-2）的期望值进行比较，以感测与至少一个期望值偏移的均衡器输出信号，以及将每个偏移的事实表示为与振幅无关的误差信号。信号感知的与振幅无关的误差信号反馈到均衡器的可调节抽头。因此，简化的误差信号避免了波形误差的复杂计算，例如最小均方根计算。误差信号可以被加权并且可以被调整以使同步提供的误差信号与均衡器的异步抽头对齐。

99. 发明授权

US07254180B1 Discrete multitone transmission systems 失效
标题翻译：离散多音传输系统
公开(公告)号：US07254180B1
公开(公告)日：2007-08-07
申请号：US09585027
申请日：2000-06-01
申请人： Sedat Oelcer
发明人： Sedat Oelcer
IPC分类号： H04L5/12
CPC分类号： H04L27/2614 , H04L27/3411
摘要： Systems for generating a discrete multitone signal are provided in which N carriers, corresponding to respective subchannels, are modulated in each sample period (T) of the signal by performing an inverse discrete Fourier transform of N modulation symbols (Xk,{tilde over (X)}k), each of which symbols (Xk,{tilde over (X)}k) represents a signal point in a QAM constellation for a respective subchannel, the QAM constellation comprising a basic constellation of M≧2m signal points where m is the number of data bits to be communicated over the subchannel in a sample period. For each of Nc≦N of the subchannels, an expanded QAM constellation is defined which comprises pM signal points including said basic constellation of points, where p is an integer greater than 1. In each expanded constellation, p−1 equivalent signal points are defined for each signal point of the basic constellation, where each of the p−1 equivalent points is selected from redundant points in the opposite quadrant of the constellation to the corresponding point of the basic constellation. The discrete multitone signal is generated in a sample period (T) by selecting, for each of the Nc subchannels, the modulation symbol (Xk,{tilde over (X)}k) representing either a basic constellation point or a corresponding equivalent point such that the peak value of the signal does not exceed a predetermined threshold.
摘要翻译：提供了用于产生离散多音信号的系统，其中通过执行N个调制符号（X＆lt; k＆gt;＆gt;）的离散傅立叶逆变换，对信号的每个采样周期（T）调制对应于各个子信道的N个载波，其中每个符号（X SUB，X SUB）表示相应的QAM星座中的信号点子信道，QAM星座包括M> = 2 信号点的基本星座，其中m是在采样周期中将在子信道上传送的数据比特数。对于N个子信道中的每一个，定义扩展的QAM星座，其包括包括所述基本星座点的pM信号点，其中p是大于1的整数。在每个扩展星座为基本星座的每个信号点定义p-1等效信号点，其中p-1个等效点中的每一个从星座的相对象限中的冗余点中选择到基本星座的对应点。离散多音信号在采样周期（T）中通过针对N个子信道中的每一个选择调制符号（X SUB k，X k）表示基本星座点或对应的等效点，使得信号的峰值不超过预定阈值。

100. 发明授权

US07000167B2 Decoding low density parity check codes 失效
公开(公告)号：US07000167B2
公开(公告)日：2006-02-14
申请号：US10044624
申请日：2002-01-08
申请人： Jon Coker , Ajay Dholakia , Evangelos S. Eleftheriou , Rick Galbraith , Thomas Mittelholzer , Sedat Oelcer
发明人： Jon Coker , Ajay Dholakia , Evangelos S. Eleftheriou , Rick Galbraith , Thomas Mittelholzer , Sedat Oelcer
IPC分类号： H03M13/00
CPC分类号： H03M13/112 , H03M13/1117 , H03M13/1515 , H03M13/255 , H03M13/2906 , H03M13/6331 , H03M13/6583
摘要： A method for decoding Low Density Parity Check (LDPC) codes comprises executing a sum product algorithm to recover a set of information bits from an LDPC code represented as a bipartite graph of symbol nodes and check nodes, the sum product algorithm being responsive to input log likelihood ratios associated with the symbol nodes. The check nodes are updated by generating a set of forward difference metrics and a set of backward difference metrics in dependence on the ratios of logarithmic probabilities each associated with a corresponding symbol node of the LDPC code, updating each metric in the set of forward difference metrics in dependence on the absolute value of the log likelihood ratio associated with the symbol node and the absolute value of the previous metric in the set, updating each metric in the set of backward difference metrics in dependence on the absolute value of the log likelihood ratio associated with the symbol node and the absolute value of the previous metric in the set, and generating log likelihood ratios to be propagated back to each symbol node in dependence on the updated sets of forward and backward difference metrics.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式