-
81.发明授权System and method for controlling line driver power in digital subscriber line modems 有权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：US07352802B2
公开(公告)日：2008-04-01
申请号：US11237001
申请日：2005-09-28
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
CPC分类号： H04L25/028 , H04L27/2626 , H04M11/062 , Y02D50/44
摘要： A low power DSL modem transmitter, suitable for incorporation in integrated DSLAM server line cards, transmits full power physical frames which include a control channel and a data field when data is available for transmission and physical frames having only a control channel or a control channel and a low power synchronization field when data is not available for transmission. And a method for controlling the total power dissipated in the integrated DSLAM by selectively restricting the flaw of data packets to the DSLs.
摘要翻译： 适用于集成DSLAM服务器线路卡的低功率DSL调制解调器发射机在数据可用于传输和仅具有控制信道或控制信道的物理帧的情况下传输包括控制信道和数据字段的全功率物理帧， 当数据不可用于传输时的低功率同步字段。 以及一种通过选择性地将数据分组的缺陷限制到DSL来控制集成DSLAM中消耗的总功率的方法。
-
82.发明申请Method for a cyclic dibit response estimation in a media system using a data set separator sequence 失效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：US20060250719A1
公开(公告)日：2006-11-09
申请号：US11122680
申请日：2005-05-05
IPC分类号： G11B5/09
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。
-
公开(公告)号：US20060119969A1
公开(公告)日：2006-06-08
申请号：US11003283
申请日：2004-12-03
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 its 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 将每个偏移及其极性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。
-
公开(公告)号：US20060039457A1
公开(公告)日：2006-02-23
申请号：US11237001
申请日：2005-09-28
IPC分类号： H04B1/38
CPC分类号： H04L25/028 , H04L27/2626 , H04M11/062 , Y02D50/44
摘要： A low power DSL modem transmitter, suitable for incorporation in integrated DSLAM server line cards, transmits full power physical frames which include a control channel and a data field when data is available for transmission and physical frames having only a control channel or a control channel and a low power synchronization field when data is not available for transmission. And a method for controlling the total power dissipated in the integrated DSLAM by selectively restricting the flow of data packets to the DSLs.
-
公开(公告)号：US20130335848A1
公开(公告)日：2013-12-19
申请号：US13527473
申请日：2012-06-19
IPC分类号： G11B5/09
CPC分类号： G11B20/10046 , G11B5/008 , G11B20/10268
摘要： In one embodiment, a data storage system includes a tape channel for reading data from a magnetic tape medium to produce a signal, a noise whitening filter positioned subsequent to the tape channel adapted for receiving the signal, wherein the noise whitening filter is adapted for minimizing variance of its output signal, a soft detector adapted for receiving output from the noise whitening filter, the soft detector adapted for calculating first soft information about each bit of the signal and sending the first soft information to a soft decoder, and the soft decoder positioned subsequent to the soft detector, the soft decoder being adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft detector. Other systems, methods, and computer program products are described according to more embodiments.
摘要翻译： 在一个实施例中，数据存储系统包括用于从磁带介质读取数据以产生信号的磁带通道，位于适于接收信号的磁带通道之后的噪声白化滤波器，其中噪声增白滤波器适于最小化 其输出信号的方差，适于接收来自噪声白化滤波器的输出的软检测器，软检测器适于计算关于信号的每个位的第一软信息，并将第一软信息发送到软解码器，并且软解码器定位 在软检测器之后，软解码器适于计算关于信号的每个位的第二软信息，并将第二软信息发送到软检测器。 根据更多实施例描述其它系统，方法和计算机程序产品。
-
公开(公告)号：US20130335845A1
公开(公告)日：2013-12-19
申请号：US13527501
申请日：2012-06-19
CPC分类号： G11B20/10046 , G11B5/008 , G11B20/10074 , G11B20/10287 , G11B2020/185 , G11B2020/1853 , G11B2220/956
摘要： In one embodiment, a data storage system includes a tape channel for reading data from a tape to produce a signal, an adaptive noise whitening filter adapted for receiving the signal, the noise whitening filter being adapted for minimizing variance of noise affecting the signal output from the noise whitening filter, a soft DMAX detector adapted for receiving the signal from the noise whitening filter, the soft detector adapted for calculating first soft information about each bit of the signal and sending the first soft information to a soft decoder, and the soft decoder positioned subsequent to the soft detector, the soft decoder being adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft DMAX detector, wherein one or more noise whitening coefficients used in the noise whitening filter are updated using a noise whitening filter coefficient updater.
摘要翻译： 在一个实施例中，数据存储系统包括用于从磁带读取数据以产生信号的磁带通道，适于接收该信号的自适应噪声白化滤波器，所述噪声白化滤波器适于最小化影响从 噪声白化滤波器，适于接收来自噪声白化滤波器的信号的软DMAX检测器，软检测器适于计算关于信号的每个位的第一软信息并将第一软信息发送到软解码器，以及软解码器 定位在软检测器之后，软解码器适于计算关于信号的每个位的第二软信息，并将第二软信息发送到软DMAX检测器，其中在噪声白化滤波器中使用的一个或多个噪声白化系数被更新 使用噪声美白滤波系数更新器。
-
87.发明申请DATA FORMAT USING AN EFFICIENT REVERSE CONCATENATED MODULATION CODE FOR MAGNETIC TAPE RECORDING 有权使用有效的反向调整码进行磁带记录的数据格式公开(公告)号：US20130326305A1
公开(公告)日：2013-12-05
申请号：US13483004
申请日：2012-05-29
IPC分类号： H03M13/00
CPC分类号： G11B5/00813 , G11B20/1833 , G11B2020/1836 , G11B2020/185 , G11B2020/1853 , G11B2220/90 , H03M5/145 , H03M13/1102 , H03M13/13 , H03M13/1515 , H03M13/2906
摘要： In one embodiment, a tape drive system includes a write channel for writing data to a magnetic tape, the write channel utilizing a rate-(232/234) reverse concatenated modulation code. The write channel includes logic adapted for receiving a data stream comprising one or more data sets, logic adapted for separating each data set into a plurality of sub data sets, logic adapted for encoding each sub data set with a C2 encoding, logic adapted for encoding each C2-encoded sub data set with a modulation code, logic adapted for encoding each modulated sub data set with a C1 encoding, and logic adapted for simultaneously writing the encoded modulated sub data sets to data tracks of the magnetic tape. Other systems for writing data to a magnetic tape utilizing a rate-(232/234) reverse concatenated modulation code are described according to various other embodiments.
摘要翻译： 在一个实施例中，磁带驱动器系统包括用于将数据写入磁带的写入通道，该写入通道利用速率（232/234）反向级联调制码。 写通道包括适于接收包括一个或多个数据组的数据流的逻辑，适用于将每个数据集分成多个子数据集的逻辑，适用于使用C2编码对每个子数据集进行编码的逻辑，适用于编码的逻辑 具有调制码的每个C2编码的子数据集，适用于用C1编码对每个经调制的子数据集进行编码的逻辑，以及用于将编码的已调制子数据集同时写入到磁带的数据轨道的逻辑。 根据各种其他实施例，描述使用速率（232/234）反向级联调制码将数据写入磁带的其它系统。
-
88.发明申请公开(公告)号：US20130128374A1
公开(公告)日：2013-05-23
申请号：US13304227
申请日：2011-11-23
CPC分类号： G11B20/10046 , G11B20/10509 , G11B2220/90 , H03H21/0012 , H03H2021/0072
摘要： A method for selecting which tap coefficients of a programmable finite-impulse-response (FIR) equalizer to fix is disclosed. In one embodiment, such a method includes performing an initial calibration to determine an initial value for each tap coefficient of a FIR equalizer. These initial values may be used to produce a first waveform. The method then performs an operation on the first waveform to produce a second waveform comprising multiple lobes. The second waveform is then analyzed to determine one or more lobes of the second waveform that have the largest area. The method then fixes coefficients of one or more taps that are closest to the lobe or lobes having the largest area. A corresponding apparatus and computer program product are also disclosed.
摘要翻译： 公开了一种用于选择可修复有限脉冲响应（FIR）均衡器的抽头系数以进行固定的方法。 在一个实施例中，这种方法包括执行初始校准以确定FIR均衡器的每个抽头系数的初始值。 这些初始值可用于产生第一波形。 该方法然后对第一波形执行操作以产生包括多个波瓣的第二波形。 然后分析第二波形以确定具有最大面积的第二波形的一个或多个波瓣。 该方法然后固定最靠近具有最大面积的凸角或凸角的一个或多个抽头的系数。 还公开了相应的装置和计算机程序产品。
-
89.发明申请SYSTEM AND METHOD FOR CONTROLLING LINE DRIVER POWER IN DIGITAL SUBSCRIBER LINE MODEMS 有权用于控制数字用户线路模式的线路驱动器功率的系统和方法公开(公告)号：US20080069194A1
公开(公告)日：2008-03-20
申请号：US11945213
申请日：2007-11-26
IPC分类号： H04B1/38
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。
-
90.发明申请公开(公告)号：US20070115574A1
公开(公告)日：2007-05-24
申请号：US11286553
申请日：2005-11-23
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175
摘要： Provided is an asynchronous read channel shaped toward generalized partial response characteristics. The read channel is incorporated in a storage device to process signals read from a storage medium. An equalizer receives asynchronous input read signals and shapes the input read signals toward a desired fixed characteristic in an asynchronous time domain. An interpolator transforms the read signal from the equalizer in the asynchronous time domain to a synchronous time domain. A noise whitening filter processes the read signal shaped toward the desired fixed characteristic to produce an output read signal shaped towards a generalized partial response polynomial. A detector receives the read signal shaped towards the generalized partial response polynomial in the synchronous time domain to determine an output value comprising data represented by the input read signals.
摘要翻译： 提供了形成为广义部分响应特性的异步读取通道。 读取通道被结合在存储设备中以处理从存储介质读取的信号。 均衡器接收异步输入读取信号，并将输入读取信号形成为异步时域中期望的固定特性。 内插器将来自异步时域中的均衡器的读信号转换为同步时域。 噪声白化滤波器处理朝向期望的固定特性成形的读取信号，以产生朝向广义部分响应多项式成形的输出读取信号。 检测器接收在同步时域中形成为广义部分响应多项式的读信号，以确定包括由输入读信号表示的数据的输出值。
-
-
-
-
-
-
-
-
-
搜索结果
103 条记录 (耗时 0.06 秒)
