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公开(公告)号：US08817907B2
公开(公告)日：2014-08-26
申请号：US12412191
申请日：2009-03-26
IPC分类号： H04L27/10
CPC分类号： H04L1/0045 , H04L1/1671 , H04L1/243
摘要： The measurement of far-end crosstalk (FEXT) in a Digital Subscriber Line communications is instrumental in the ability of using a multiple input multiple output (MIMO) pre-coder to cancel FEXT. A reliable robust back channel for transmission of error is instrumental to provide error samples for the proper operation of a MIMO pre-coder. Bins can be dedicated to insure bandwidth from the customer premises equipment (CPE) to the central office (CO). By increasing the margin used in the bins, robustness can be added to this back channel between the CPE and CO.
摘要翻译： 数字用户线路通信中远端串扰（FEXT）的测量有助于使用多输入多输出（MIMO）预编码器取消FEXT。 用于错误传输的可靠的鲁棒后置信道对于为MIMO预编码器的正确操作提供错误样本是有用的。 可以专门用于保证客户端设备（CPE）到中心局（CO）的带宽。 通过增加机箱中使用的余量，可以在CPE和CO之间的后向通道中增加鲁棒性。
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公开(公告)号：US20090245340A1
公开(公告)日：2009-10-01
申请号：US12412191
申请日：2009-03-26
IPC分类号： H04B17/00
CPC分类号： H04L1/0045 , H04L1/1671 , H04L1/243
摘要： The measurement of far-end crosstalk (FEXT) in a Digital Subscriber Line communications is instrumental in the ability of using a multiple input multiple output (MIMO) pre-coder to cancel FEXT. A reliable robust back channel for transmission of error is instrumental to provide error samples for the proper operation of a MIMO pre-coder. Bins can be dedicated to insure bandwidth from the customer premises equipment (CPE) to the central office (CO). By increasing the margin used in the bins, robustness can be added to this back channel between the CPE and CO.
摘要翻译： 数字用户线路通信中远端串扰（FEXT）的测量有助于使用多输入多输出（MIMO）预编码器取消FEXT。 用于错误传输的可靠的鲁棒后置信道对于为MIMO预编码器的正确操作提供错误样本是有用的。 可以专门用于保护客户端设备（CPE）到中心局（CO）的带宽。 通过增加机箱中使用的余量，可以在CPE和CO之间的后向通道中增加鲁棒性。
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3.发明申请SYSTEMS AND METHODS FOR SELECTING TONES FOR FAR-END CROSS TALK MITIGATION 有权用于选择用于末端十字路口减速的音调的系统和方法公开(公告)号：US20100278328A1
公开(公告)日：2010-11-04
申请号：US12431878
申请日：2009-04-29
IPC分类号： H04B3/32
CPC分类号： H04B3/32
摘要： Systems and methods are described for selecting tones for far-end crosstalk (FEXT) mitigation. In particular, systems and methods are described for performing far-end crosstalk (FEXT) mitigation within a digital subscriber line (xDSL) system. One embodiment is a method that comprises determining a first set of function values relating to a per-tone signal-to-noise ratio (SNR) for a user among a plurality of users for a number of tones, wherein the number of tones is less than or equal to a total number of tones available for transmission. The method further comprises estimating coefficients for performing FEXT mitigation for the number of tones, performing FEXT mitigation on the number of tones based on the estimated coefficients, and performing FEXT mitigation on a selected group of tones from among the number of tones, wherein the selected group of tones is less than or equal to the number tones.
摘要翻译： 描述了用于选择用于远端串扰（FEXT）减轻的音调的系统和方法。 特别地，描述了用于在数字用户线（xDSL）系统内执行远端串扰（FEXT）减轻的系统和方法。 一个实施例是一种方法，其包括确定与多个用户之间的用户对于多个音调的用户的每音调信噪比（SNR）有关的第一功能值集合，其中，音调数量较少 超过或等于可用于传输的总音数。 该方法还包括估计用于对音调数执行FEXT减轻的系数，基于估计的系数对音调数执行FEXT减轻，以及从所选择的音数中对所选择的音调组执行FEXT减轻，其中所选择的 一组音调小于或等于数字音。
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4.发明授权公开(公告)号：US08204211B2
公开(公告)日：2012-06-19
申请号：US12431878
申请日：2009-04-29
CPC分类号： H04B3/32
摘要： Systems and methods are described for selecting tones for far-end crosstalk (FEXT) mitigation. In particular, systems and methods are described for performing far-end crosstalk (FEXT) mitigation within a digital subscriber line (xDSL) system. One embodiment is a method that comprises determining a first set of function values relating to a per-tone signal-to-noise ratio (SNR) for a user among a plurality of users for a number of tones, wherein the number of tones is less than or equal to a total number of tones available for transmission. The method further comprises estimating coefficients for performing FEXT mitigation for the number of tones, performing FEXT mitigation on the number of tones based on the estimated coefficients, and performing FEXT mitigation on a selected group of tones from among the number of tones, wherein the selected group of tones is less than or equal to the number tones.
摘要翻译： 描述了用于选择用于远端串扰（FEXT）减轻的音调的系统和方法。 特别地，描述了用于在数字用户线（xDSL）系统内执行远端串扰（FEXT）减轻的系统和方法。 一个实施例是一种方法，其包括确定与多个用户之间的用户对于多个音调的用户的每音调信噪比（SNR）有关的第一功能值集合，其中，音调数量较少 超过或等于可用于传输的总音数。 该方法还包括估计用于对音调数执行FEXT减轻的系数，基于估计的系数对音调数执行FEXT减轻，以及从所选择的音数中对所选择的音调组执行FEXT减轻，其中所选择的 一组音调小于或等于数字音。
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5.发明申请Systems and Methods for Implementing a Multi-Sensor Receiver in a DSM3 Environment 有权在DSM3环境中实现多传感器接收器的系统和方法公开(公告)号：US20110235759A1
公开(公告)日：2011-09-29
申请号：US13051906
申请日：2011-03-18
IPC分类号： H04L25/08
CPC分类号： H04B1/1027 , H04B3/32 , H04L25/03012 , H04L25/03159
摘要： In accordance with one embodiment, a method is implemented in a vectored system for improving a signal-to-noise ratio (SNR) of a far end transmitted signal on a victim line in the system. The method comprises mitigating, by the vectored system, self-induced far-end crosstalk (self-FEXT) on the victim line based on self-FEXT mitigation coefficients and receiving, by a second sensor, information relating to at least one of: self-FEXT of the vectored system, external noise, and the far end transmitted signal. The method further comprises learning, at the second sensor, coefficients relating to self-FEXT coupling into the second sensor and removing self-FEXT from the second sensor based on the learned coefficients. Upon removal of self-FEXT from the second sensor, a linear combiner configured to combine information relating to the victim line and the second line is learned. The method further comprises applying the learned linear combiner and readjusting the self-FEXT mitigation coefficients to remove any residual self-FEXT on the victim line after application of the learned linear combiner.
摘要翻译： 根据一个实施例，在矢量系统中实现一种方法，用于改善系统中受害线路上的远端发射信号的信噪比（SNR）。 该方法包括通过矢量系统减轻基于自FEXT减轻系数的受害线上的自身诱发的远端串扰（self-FEXT），并且由第二传感器接收与以下至少一个相关的信息：自身 -OFXT的矢量系统，外部噪声和远端传输信号。 该方法还包括在第二传感器处学习与第二传感器的自FEXT耦合有关的系数，并且基于所学习的系数从第二传感器中去除自FEXT。 在从第二传感器移除自身FEXT时，学习用于组合与受害线和第二线有关的信息的线性组合器。 该方法还包括应用所学习的线性组合器，并且在应用所学习的线性组合器之后重新调整自FEXT缓解系数以去除所述受害线上的任何剩余自FEXT。
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公开(公告)号：US20100220823A1
公开(公告)日：2010-09-02
申请号：US12713482
申请日：2010-02-26
申请人： Pravesh Biyani , Laurent Francis Alloin , Shankar Prakriya , Surendra Prasad , Amitkumar Mahadevan
发明人： Pravesh Biyani , Laurent Francis Alloin , Shankar Prakriya , Surendra Prasad , Amitkumar Mahadevan
IPC分类号： H04B1/10
CPC分类号： H04B3/32 , H04J1/12 , H04L2025/03414 , H04L2025/03426
摘要： Systems and methods for partial self-FEXT (far-end crosstalk) are described. One method, among others, comprises determining one or more instantaneous characteristics of an input signal, wherein the one or more instantaneous characteristics comprise one or more of amplitude of the input signal and an energy level of the input signal. The method further comprises selecting one or more disturbers to cancel according to the one or more instantaneous characteristics, wherein selecting one or more disturbers is performed on a per-DMT (discrete multi-tone) symbol basis.
摘要翻译： 描述了部分自FEXT（远端串扰）的系统和方法。 一种方法包括确定输入信号的一个或多个瞬时特性，其中一个或多个瞬时特性包括输入信号的幅度和输入信号的能级中的一个或多个。 该方法还包括根据一个或多个瞬时特性选择一个或多个干扰器来取消，其中，对每个DMT（离散多音调）符号进行选择一个或多个干扰器。
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7.发明授权Systems and methods for implementing a multi-sensor receiver in a DSM3 environment 有权用于在DSM3环境中实现多传感器接收器的系统和方法公开(公告)号：US08576690B2
公开(公告)日：2013-11-05
申请号：US13051906
申请日：2011-03-18
IPC分类号： H04J1/12
CPC分类号： H04B1/1027 , H04B3/32 , H04L25/03012 , H04L25/03159
摘要： In accordance with one embodiment, a method is implemented in a vectored system for improving a signal-to-noise ratio (SNR) of a far end transmitted signal on a victim line in the system. The method comprises mitigating, by the vectored system, self-induced far-end crosstalk (self-FEXT) on the victim line based on self-FEXT mitigation coefficients and receiving, by a second sensor, information relating to at least one of: self-FEXT of the vectored system, external noise, and the far end transmitted signal. The method further comprises learning, at the second sensor, coefficients relating to self-FEXT coupling into the second sensor and removing self-FEXT from the second sensor based on the learned coefficients. Upon removal of self-FEXT from the second sensor, a linear combiner configured to combine information relating to the victim line and the second line is learned. The method further comprises applying the learned linear combiner and readjusting the self-FEXT mitigation coefficients to remove any residual self-FEXT on the victim line after application of the learned linear combiner.
摘要翻译： 根据一个实施例，在矢量系统中实现一种方法，用于改善系统中受害线路上的远端发射信号的信噪比（SNR）。 该方法包括通过矢量系统减轻基于自FEXT减轻系数的受害线路上的自身诱发的远端串扰（self-FEXT），并且由第二传感器接收与以下至少一个相关的信息：自身 -OFXT的矢量系统，外部噪声和远端传输信号。 该方法还包括在第二传感器处学习与第二传感器的自FEXT耦合有关的系数，并且基于所学习的系数从第二传感器中去除自FEXT。 在从第二传感器移除自身FEXT时，学习用于组合与受害线和第二线有关的信息的线性组合器。 该方法还包括应用所学习的线性组合器并且重新调整自FEXT缓解系数以在施加学习的线性组合器之后去除受害线上的任何残余自FEXT。
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公开(公告)号：US08644127B2
公开(公告)日：2014-02-04
申请号：US12713482
申请日：2010-02-26
申请人： Pravesh Biyani , Laurent Francis Alloin , Shankar Prakriya , Surendra Prasad , Amitkumar Mahadevan
发明人： Pravesh Biyani , Laurent Francis Alloin , Shankar Prakriya , Surendra Prasad , Amitkumar Mahadevan
CPC分类号： H04B3/32 , H04J1/12 , H04L2025/03414 , H04L2025/03426
摘要： Systems and methods for partial self-FEXT (far-end crosstalk) are described. One method, among others, comprises determining one or more instantaneous characteristics of an input signal, wherein the one or more instantaneous characteristics comprise one or more of amplitude of the input signal and an energy level of the input signal. The method further comprises selecting one or more disturbers to cancel according to the one or more instantaneous characteristics, wherein selecting one or more disturbers is performed on a per-DMT (discrete multi-tone) symbol basis.
摘要翻译： 描述了部分自FEXT（远端串扰）的系统和方法。 一种方法包括确定输入信号的一个或多个瞬时特性，其中一个或多个瞬时特性包括输入信号的幅度和输入信号的能级中的一个或多个。 该方法还包括根据一个或多个瞬时特性选择一个或多个干扰器来取消，其中，对每个DMT（离散多音调）符号进行选择一个或多个干扰器。
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9.发明授权Systems and methods for loop termination detection based on per-port calibration 失效基于每端口校准的循环终止检测的系统和方法公开(公告)号：US08515017B2
公开(公告)日：2013-08-20
申请号：US12044531
申请日：2008-03-07
IPC分类号： H04M1/24
摘要： Systems and methods for performing loop termination are described. One embodiment is a method that comprises receiving a per-port calibrated echo signal of a loop under test, receiving a region designation and a loop length for the loop under test, and determining whether the loop is terminated by a short or open termination based on phase of the per-port calibrated echo signal.
摘要翻译： 描述用于执行环路终止的系统和方法。 一个实施例是一种方法，其包括接收被测环路的每端口校准的回波信号，接收被测环路的区域指定和环路长度，以及基于基于 每端口校准回波信号的相位。
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10.发明申请SYSTEMS AND METHODS FOR CHARACTERIZING LOOP TERMINATION VIA SINGLE-ENDED LINE TESTING 有权通过单端测试来表征环路终止的系统和方法公开(公告)号：US20100086105A1
公开(公告)日：2010-04-08
申请号：US12325541
申请日：2008-12-01
IPC分类号： H04M1/24
CPC分类号： H04M3/302
摘要： Disclosed are various embodiments for determining a state of loop termination. One embodiment comprises receiving an un-calibrated echo signal for the loop under test using frequency domain reflectometry single-ended line testing (FDR-SELT) and determining the state of loop termination based on phase of the un-calibrated echo signal. The step of determining the state of loop termination comprises determining whether the loop is terminated by an open termination or a short termination by correlating the phase of the echo signal with an expected phase of the echo signal derived from measurements taken at the same loop length for open and short terminations. For other embodiments, the amplitude of the un-calibrated echo signal is analyzed to determine whether the loop is terminated by a matched-impedance termination.
摘要翻译： 公开了用于确定环路终止状态的各种实施例。 一个实施例包括使用频域反射测试单端线测试（FDR-SELT）接收待测环路的未校准回波信号，并且基于未经校准的回波信号的相位确定环路终止状态。 确定环路终止状态的步骤包括通过将回波信号的相位与从在相同环路长度处获取的测量得到的回波信号的预期相位相关联来确定环路是否由开放终止或短终端终止， 开放和短暂终止。 对于其他实施例，分析未校准的回波信号的幅度，以确定环路是否由匹配阻抗终端终止。
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