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1.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。
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2.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：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
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。
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3.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：US06973123B2
公开(公告)日：2005-12-06
申请号：US09814044
申请日：2001-03-21
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 flow 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。 以及一种用于通过选择性地限制数据分组到DSL的流量来控制在集成DSLAM中消耗的总功率的方法。
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4.发明授权System and method for controlling line driver power in a shared digital subscriber line modem 失效在共享数字用户线路调制解调器中控制线路驱动器功率的系统和方法公开(公告)号：US06965637B2
公开(公告)日：2005-11-15
申请号：US09813558
申请日：2001-03-21
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
摘要： A shared digital subscriber line modem achieves reduced total power consumption and data security by generating and transmitting a physical data frame which includes a control channel and a data field to only the connected client modem associated with the intended recipient. A second physical frame which does not include the data field is generated and transmitted to all of the other connected client modems. This method results in a reduction in the power required and provides improved data security by preventing data access to non-addressed client modems.
摘要翻译： 共享数字用户线路调制解调器通过仅向与预期接收者相关联的连接的客户端调制解调器生成并发送包括控制信道和数据字段的物理数据帧来实现减少的总功耗和数据安全性。 不包括数据字段的第二物理帧被生成并发送到所有其他连接的客户端调制解调器。 这种方法导致所需功率的降低，并且通过防止数据访问未被寻址的客户端调制解调器来提供改进的数据安全性。
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公开(公告)号：US06895547B2
公开(公告)日：2005-05-17
申请号：US09902859
申请日：2001-07-11
CPC分类号： H04L1/0058 , G11B20/1833 , H03M13/1162 , H03M13/118 , H03M13/255
摘要： A method for low-density parity-check (LDPC) encoding of data comprises defining a first M×N parity check matrix; generating, based on the first parity check matrix, a second parity check matrix having an M×M triangular sub-matrix; and, mapping the data into an LDPC code word based on the second parity check matrix. The method is particularly useful for data communications applications, but may also be employed in other applications such as, for example, data storage.
摘要翻译： 用于数据的低密度奇偶校验（LDPC）编码的方法包括定义第一M×N奇偶校验矩阵; 基于所述第一奇偶校验矩阵生成具有M×M三角形子矩阵的第二奇偶校验矩阵; 以及基于第二奇偶校验矩阵将数据映射到LDPC码字。 该方法对于数据通信应用特别有用，但也可以用于其他应用中，例如数据存储。
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公开(公告)号：US08872573B2
公开(公告)日：2014-10-28
申请号：US13342881
申请日：2012-01-03
CPC分类号： G11B20/10009 , G11B5/09 , G11B20/10027 , G11B20/10037 , G11B20/10046 , G11B20/10055 , G11B20/10074 , G11B20/10175 , G11B20/10212 , G11B20/10425 , G11B2220/90
摘要： A method according to one embodiment includes receiving an increment signal at a first integrator when a second integrator overflows; receiving a decrement signal at the first integrator when the second integrator underflows; and incrementing or decrementing a gain applied to an analog signal based on receipt of the increment or decrement signal. A system according to one embodiment includes a first integrator configured to cause incrementing of a gain applied to an analog signal based on receipt of an increment signal when a second integrator overflows, the first integrator being configured to cause decrementing of the gain applied to the analog signal based on receipt of a decrement signal when the second integrator underflows; and the second integrator.
摘要翻译： 根据一个实施例的方法包括当第二积分器溢出时在第一积分器处接收增量信号; 当第二积分器下溢时，在第一积分器处接收递减信号; 以及基于所述增量或减量信号的接收递增或递减施加到模拟信号的增益。 根据一个实施例的系统包括第一积分器，其被配置为当第二积分器溢出时，基于接收到增量信号来增加施加到模拟信号的增益，所述第一积分器被配置为引起施加到模拟信号的增益的递减 当第二积分器下溢时基于接收到递减信号的信号; 和第二个积分器。
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公开(公告)号：US08743499B2
公开(公告)日：2014-06-03
申请号：US13527490
申请日：2012-06-19
CPC分类号： G11B5/00817 , G11B5/09 , G11B20/10046 , G11B20/10074 , G11B20/10287 , G11B2220/90
摘要： In one embodiment, a system includes a tape channel for reading data from a magnetic tape medium to produce a signal, a bank of noise whitening filters positioned subsequent to the tape channel adapted for receiving the signal, the bank of noise whitening filters being adapted for minimizing variance of noise affecting the signal at an output of the bank of noise whitening filters, wherein each noise whitening filter in the bank of noise whitening filters is dependent on a different possible data pattern, a soft DMAX detector adapted for calculating first soft information, dependent on the different possible data patterns, about each bit of the signal from the bank of noise whitening filters, and sending the first soft information to a soft decoder adapted for calculating second soft information about each bit of the signal and sending the second soft information to the soft DMAX detector.
摘要翻译： 在一个实施例中，系统包括用于从磁带介质读取数据以产生信号的带通道，位于适于接收信号的磁带通道之后的一组噪声白化滤波器，噪声增白滤波器组适于 最小化影响噪声白化滤波器组的输出处的信号的噪声的方差，其中噪声白化滤波器组中的每个噪声白化滤波器取决于不同的可能数据模式，适于计算第一软信息的软DMAX检测器， 取决于不同的可能数据模式，关于噪声白化滤波器组的信号的每个位，并且将第一软信息发送到软解码器，该软解码器适于计算关于信号的每个位的第二软信息，并且发送第二软信息 到软DMAX检测器。
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8.发明申请METHODS FOR PARTIAL REVERSE CONCATENATION FOR DATA STORAGE DEVICES USING COMPOSITE CODES 有权使用复合代码进行数据存储设备部分反向定位的方法公开(公告)号：US20130326307A1
公开(公告)日：2013-12-05
申请号：US13483026
申请日：2012-05-29
CPC分类号： H03M13/2906 , G06F11/1076 , G11B20/1426 , G11B2020/1836 , G11B2020/1853 , G11B2220/956 , H03M13/09 , H03M13/1102 , H03M13/1515 , H03M13/253 , H03M13/29 , H03M13/2909 , H03M13/2945 , H03M13/2957
摘要： In one embodiment, a method includes writing data to a storage medium of a data storage system using a partial reverse concatenated modulation code by encoding data sets using a C2 encoding scheme, adding a header to each subunit of the data sets, encoding the headers of the data sets with a first modulation encoding scheme, encoding data portions of the data sets with a second modulation encoding scheme, encoding portions of the one or more C2-encoded data sets using a C1 encoding scheme, combining the C1-encoded portions with the modulation-encoded headers of the C2-encoded data sets using a multiplexer, and writing the one or more combined C1- and C2-encoded data sets to data tracks of the storage medium. Other methods for writing data to a storage medium of a data storage system using a partial reverse concatenated modulation code are presented according to more embodiments.
摘要翻译： 在一个实施例中，一种方法包括使用部分反向级联调制码将数据写入数据存储系统的存储介质，通过使用C2编码方案对数据集进行编码，将头部添加到数据集的每个子单元， 具有第一调制编码方案的数据集，用第二调制编码方案对数据集的数据部分进行编码，使用C1编码方案对所述一个或多个C2编码数据集的部分进行编码，将C1编码部分与 使用多路复用器对C2编码数据集的调制编码报头，以及将一个或多个组合的C1和C2编码的数据集写入存储介质的数据轨道。 根据更多实施例，呈现用于使用部分反向级联调制码将数据写入数据存储系统的存储介质的其它方法。
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9.发明授权公开(公告)号：US08077764B2
公开(公告)日：2011-12-13
申请号：US12360777
申请日：2009-01-27
IPC分类号： H03H7/30
CPC分类号： H04L25/03299 , H04L25/03197 , H04L2025/03617
摘要： A 16-State adaptive NPML detector is provided for a tape drive which addresses weaknesses of a conventional fixed, 8-state EPR4 detector. Rather than having a fixed target channel, the detector is programmable to allow a range of target channels and can support “classical” partial response channels such as PR4 or EPR4 by programming predictor or whitening filter coefficients. In one embodiment, two filter coefficients may be set via XREG inputs or dynamically determined through the use of an LMS algorithm allowing the detector to adapt the predictor coefficients as data is being read. Another embodiment provides a detector for an EPR4 target in which the whitening filter has one coefficient. Components of the detection system include the detector itself, an LMS engine, a coefficient engine and a noise predictive or whitening filter. Coefficients from the LMS engine may be loaded or stored dynamically based upon conditions in the tape drive.
摘要翻译： 为磁带驱动器提供了16状态自适应NPML检测器，其解决了常规固定的8状态EPR4检测器的缺点。 不是具有固定的目标通道，检测器可编程以允许一定范围的目标通道，并且可以通过编程预测器或白化滤波器系数来支持“经典”部分响应通道，例如PR4或EPR4。 在一个实施例中，可以经由XREG输入来设置两个滤波器系数，或者通过使用LMS算法动态地确定，允许检测器在正在读取数据时调整预测器系数。 另一个实施例提供了一种用于EPR4目标的检测器，其中白化滤波器具有一个系数。 检测系统的组件包括检测器本身，LMS引擎，系数引擎和噪声预测或增白滤波器。 可以根据磁带驱动器中的条件动态地加载或存储来自LMS引擎的系数。
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10.发明申请DATA-DEPENDENT NOISE-PREDICTIVE MAXIMUM LIKELIHOOD DETECTION (DD-NPML) FOR MAGNETIC RECORDING 有权用于磁记录的数据依赖性噪声预测最大似然检测（DD-NPML）公开(公告)号：US20110242692A1
公开(公告)日：2011-10-06
申请号：US12753586
申请日：2010-04-02
IPC分类号： G11B27/36
CPC分类号： G11B20/10009 , G11B20/10046 , G11B20/10074 , G11B20/10175 , G11B20/10287 , G11B2220/90
摘要： In one embodiment, a method includes applying one or more whitening filters to an input stream of digitized samples from a magnetic data channel to produce a filtered sequence, performing one or more branch metric calculations to the filtered sequence to produce a branch metric, and applying a multi-state data-dependent noise-predictive maximum likelihood (DD-NPML) detector to the branch metric to produce an output stream. In another embodiment, a multi-channel data storage system includes a head for reading data from a storage medium, logic for applying one or more whitening filters to an input stream of digitized samples from a magnetic data channel to produce a filtered sequence, logic for performing one or more branch metric calculations to the filtered sequence to produce a branch metric, and logic for applying a multi-state DD-NPML detector to the branch metric to produce an output stream. Other systems and methods are described as well.
摘要翻译： 在一个实施例中，一种方法包括将一个或多个白化滤波器应用于来自磁数据信道的数字化样本的输入流，以产生经滤波的序列，对经滤波的序列执行一个或多个分支度量计算以产生分支度量，以及应用 用于产生输出流的分支度量的多状态数据相关噪声预测最大似然（DD-NPML）检测器。 在另一个实施例中，多通道数据存储系统包括用于从存储介质读取数据的头，用于将一个或多个白化滤波器应用于来自磁数据通道的数字化采样的输入流以产生滤波序列的逻辑，用于 对经滤波的序列执行一个或多个分支度量计算以产生分支度量，以及将多状态DD-NPML检测器应用于分支度量以产生输出流的逻辑。 还描述了其他系统和方法。
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