公开(公告)号：US07295603B2

公开(公告)日：2007-11-13

申请号：US11009710

申请日：2004-12-13

Applicant: Patrick Duvaut ,  Ehud Langberg ,  Anupama Ramalingam

Inventor： Patrick Duvaut ,  Ehud Langberg ,  Anupama Ramalingam

IPC: H04B1/38 ,  H04L5/16

CPC classification number: H04B3/32 ,  H04B3/487

Abstract: A method and apparatus implements a Virtual Exchange Reference Impact (VERI) technique to define a pattern to shape the spectrum of a cabinet deployed system to minimize its impact, e.g., FEXT, into an exchange deployed system while achieving effective cabinet system performance, e.g., in terms of data transmission rate. The invention shapes the cabinet system to replicate a self-impact of the exchange system on itself based on the known distance of the cabinet from the exchange. The shaping is required when both exchange and cabinet systems share the same bundle and exhibit overlapped bandwidths. A particular example consists of VDSL deployed from remote cabinet impacting ADSL2/ADSL2+ deployed from the exchange.

Abstract translation: 一种方法和装置实现了虚拟交换参考影响（VERI）技术，以定义一种模式来形成柜部署系统的频谱，以将其影响（例如FEXT）最小化到交换部署系统中，同时实现有效的机柜系统性能， 在数据传输率方面。 本发明根据柜与交换机的已知距离对橱柜系统进行整形以将交换系统的自身影响复制到其自身上。 交换和机柜系统共享相同的捆绑包并展示重叠的带宽时，需要进行整形。 一个特定的例子包括从远程机柜部署的VDSL，影响从交换机部署的ADSL2 / ADSL2 +。

公开(公告)号：US07653138B2

公开(公告)日：2010-01-26

申请号：US10874329

申请日：2004-06-24

Applicant: Patrick Duvaut ,  Ehud Langberg ,  William Scholtz

Inventor： Patrick Duvaut ,  Ehud Langberg ,  William Scholtz

IPC: H04L27/00

CPC classification number: H04L1/0656 ,  H04L27/2602 ,  H04L27/2626 ,  H04L27/2647

Abstract: A technique for improving multiple-channel multi-tone transmissions is disclosed. According to one particular embodiment, a method for transmitting data over at least two bonded channels is provided, wherein each of the at least two bonded channels comprises a plurality of tones. The method may comprise: transmitting a first symbol stream over a first tone in a first bonded channel and over a second tone in a second bonded channel, wherein the first tone is bonded to the second tone, and the transmissions over the first tone and the second tone are substantially in parallel; transmitting a second symbol stream over a third tone in the first bonded channel; and transmitting a third symbol stream over a fourth tone in the second bonded channel, wherein the third tone is bonded to the fourth tone, and the transmissions of the second symbol stream and the third symbol stream are substantially in parallel.

Abstract translation: 公开了一种用于改善多声道多音调传输的技术。 根据一个特定实施例，提供了一种用于在至少两个绑定信道上传输数据的方法，其中所述至少两个绑定信道中的每一个包括多个音调。 该方法可以包括：通过第一绑定信道中的第一音调和第二绑定信道中的第二音调发送第一符号流，其中第一音调被绑定到第二音调，并且通过第一音调和 第二音基本上是平行的; 在所述第一绑定信道中通过第三音调发送第二符号流; 以及在所述第二绑定信道中通过第四音调发送第三符号流，其中所述第三音调被绑定到所述第四音调，并且所述第二符号流和所述第三符号流的传输基本上是并行的。

公开(公告)号：US07406126B2

公开(公告)日：2008-07-29

申请号：US10714655

申请日：2003-11-18

Applicant: Patrick Duvaut ,  Ehud Langberg ,  Lujing Cai ,  Laurent Pierrugues ,  William Scholtz ,  Oliver Moreno ,  Feng Ouyang ,  Massimo Sorbara

Inventor： Patrick Duvaut ,  Ehud Langberg ,  Lujing Cai ,  Laurent Pierrugues ,  William Scholtz ,  Oliver Moreno ,  Feng Ouyang ,  Massimo Sorbara

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04L5/143 ,  H04L5/1438 ,  H04L27/2626 ,  H04Q2213/13039

Abstract: Various embodiments for addressing the performance objectives of LDSL and examples of smart systems for LDSL are disclosed. An evaluation of the spectral compatibility of two LDSL modes based on two different downstream masks, identified herein as LDSL Wide and Narrow, is disclosed. Spectral compatibility is evaluated in accordance with existing rules. Other embodiments may further comprise determining features of upstream transmission.

Abstract translation: 公开了用于解决LDSL的性能目标的各种实施例和用于LDSL的智能系统的示例。 公开了基于两种不同下游掩模的两种LDSL模式的频谱兼容性的评估，这两种不同的下行掩码在本文中被标识为LDSL Wide和Narrow。 光谱兼容性根据现有规则进行评估。 其他实施例还可以包括确定上行传输的特征。

公开(公告)号：US07120211B2

公开(公告)日：2006-10-10

申请号：US10393345

申请日：2003-03-21

Applicant: Faina Shmulyian ,  Ehud Langberg ,  Patrick Duvaut

Inventor： Faina Shmulyian ,  Ehud Langberg ,  Patrick Duvaut

IPC: H04L1/00

CPC classification number: H04B1/1036 ,  H04B1/123 ,  H04B15/02 ,  H04L1/206 ,  H04L27/2647

Abstract: Disclosed herein are various mechanisms for the adaptive cancellation of radio frequency interference (RFI) in Discrete Multitone (DMT)-based signal transmissions systems. various mechanisms for the adaptive cancellation of radio frequency interference (RFI) in Discrete Multitone (DMT) modulated signal transmissions systems. In at least one embodiment of the present invention, RFI introduced by one or more RFI disturbers (e.g., ham radios) into a DMT modulated signal may be detected by calculating an RFI canceller coefficient for some or all of the DMT bins of the signal, where the RFI canceller coefficient represents the correlation between the noise at the corrupted bin and the reference RFI noise. The RFI canceller coefficients for the corrupted bins may be calculated using an LMS adaptation process. Those bins where the magnitude of the corresponding RFI canceller coefficient is greater than a certain threshold may be marked as corrupted by RFI. Further, one or more bins having RFI canceller coefficients with the largest magnitudes may be marked as reference disturber bins. The noise (e.g., error) present in the identified reference disturber bins may be determined using, for example, the slicer error. The RFI disturbance at some or all of the corrupted bins then may be estimated based at least in part on the error of the reference disturber bin proximal to the corrupted bin and the RFI canceller coefficient for the corrupted bin. The received signal then may be adjusted based on the RFI estimations for some or all of the corrupted bins to reduce or eliminate the RFI disturbance in the signal.

公开(公告)号：US20050213714A1

公开(公告)日：2005-09-29

申请号：US10808549

申请日：2004-03-25

Applicant: Ehud Langberg ,  William Scholtz ,  Lujing Cai ,  Albert Rapaport ,  Shareq Rahman ,  Patrick Duvaut

Inventor： Ehud Langberg ,  William Scholtz ,  Lujing Cai ,  Albert Rapaport ,  Shareq Rahman ,  Patrick Duvaut

IPC: H04L1/00 ,  H04L5/02 ,  H04L27/26 ,  H04M1/24 ,  H04M3/08

CPC classification number: H04L5/023 ,  H04L1/0026 ,  H04L27/2608

Abstract: A system and method for multiple inputs, multiple outputs (MIMO) PSD allocation in a DSL system is disclosed. In some embodiments, the method may comprise monitoring system performance by performing a multi-ended line test (MELT), processing the MELT and allocating PSD based on at least one of system coupling power and system traffic.

Abstract translation: 公开了DSL系统中的多输入多输出（MIMO）PSD分配的系统和方法。 在一些实施例中，该方法可以包括通过执行多端线路测试（MELT）来监视系统性能，处理MELT并且基于系统耦合功率和系统业务中的至少一个来分配PSD。

公开(公告)号：US08194767B2

公开(公告)日：2012-06-05

申请号：US13091651

申请日：2011-04-21

Applicant: Patrick Duvaut ,  Amitkumar Mahadevan ,  Massimo Sorbara ,  Ehud Langberg

Inventor： Patrick Duvaut ,  Amitkumar Mahadevan ,  Massimo Sorbara ,  Ehud Langberg

IPC: H04L27/28

CPC classification number: H04B3/32 ,  H04L1/0042

Abstract: One embodiment is a method for precoding data for transmission in a discrete multi-tone (DMT) system to cancel self-induced far end crosstalk (self-FEXT). The method comprises learning, by the system, characteristics associated with a plurality of N users within a digital subscriber line (xDSL) system to determine an initial off-diagonal multiple input multiple output (MIMO) precoder (ODMP) for a given tone frequency and converging towards an ODMP from the initial ODMP to cancel self-FEXT for the plurality of N users, wherein the ODMP is represented as a zero diagonal matrix containing only off-diagonal terms.

Abstract translation: 一个实施例是用于在离散多音（DMT）系统中预编码用于传输的数据以消除自感应远端串扰（self-FEXT）的方法。 该方法包括通过系统学习与数字用户线（xDSL）系统内的多个N个用户相关联的特征，以确定给定音频的初始非对角多输入多输出（MIMO）预编码器（ODMP），以及 从初始ODMP收敛到ODMP以取消多个N个用户的自身FEXT，其中ODMP被表示为仅包含非对角项的零对角矩阵。

公开(公告)号：US07764752B2

公开(公告)日：2010-07-27

申请号：US10672079

申请日：2003-09-29

Applicant: Ehud Langberg ,  Patrick Duvaut ,  Peter Kleewein ,  Wolfgang Kleewein, legal representative ,  Laurent Pierrugues

Inventor： Ehud Langberg ,  Patrick Duvaut ,  Peter Kleewein ,  Laurent Pierrugues

IPC: H03D1/04 ,  H04B1/10

CPC classification number: H04L5/16 ,  H04B3/32 ,  H04L5/023

Abstract: A method and system of the present inventions reduces both near-end crosstalk (NEXT) and far-end crosstalk (FEXT) interferences due to handshake tones into upstream and downstream neighboring services, both at the customer premises equipment (CPE) and at the central office (CO), when handshake is experienced. An embodiment of the present inventions is directed to significantly reduce the NEXT and/or FEXT interferences due to handshake tones. For example, NEXT and/or FEXT interferences due to G.994.1 handshake tones, identified as, bins 7 and 9 for the Upstream channel and bins 12, 14 and 64 for the Downstream channel may be reduced. An embodiment of the present inventions provides an algorithm that may be used for both NEXT and FEXT Handshake Interferences reduction at the CO and at the CPE. In addition, the algorithm may operate in the time domain and in the frequency domain. Frequency domain algorithm offers two options, both versions taking advantage of the high correlation time of the Handshake tone signals.

Abstract translation: 本发明的方法和系统将客户端设备（CPE）和中央处理器（CPE）处的上下游相邻服务期间由于握手音调的近端串扰（NEXT）和远端串扰（FEXT）干扰减少 办公室（CO），握手时经历。 本发明的实施例旨在显着地减少由于握手音而引起的NEXT和/或FEXT干扰。 例如，可以减少由于G.994.1握手音调而导致的NEXT和/或FEXT干扰，被识别为用于上行信道的分组7和9以及用于下行信道的分组12,14和64。 本发明的一个实施例提供了一种算法，其可以用于在CO和CPE处的NEXT和FEXT握手干扰减少。 另外，该算法可以在时域和频域中操作。 频域算法提供两个选项，两个版本利用握手音信号的高相关时间。

公开(公告)号：US20090219979A1

公开(公告)日：2009-09-03

申请号：US12392039

申请日：2009-02-24

Applicant: Patrick Duvaut ,  Ehud Langberg

Inventor： Patrick Duvaut ,  Ehud Langberg

IPC: H04B1/38

CPC classification number: H04Q11/04 ,  H04Q2213/13039 ,  H04Q2213/13094 ,  H04Q2213/13204 ,  H04Q2213/13396

Abstract: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

Abstract translation: 本发明通过定义两个上游掩码（U1，U2）和两个下行掩码（D1，D2）并使用用于长距离数字用户线（LDSL）的掩码可选择系统来克服各种问题，其中唯一的调制解调器特征被激活 在握手期间，根据频谱兼容性自动检查物理层状态，因此，使用掩码可选择系统自动优化升压模式，在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

公开(公告)号：US07496135B2

公开(公告)日：2009-02-24

申请号：US11849618

申请日：2007-09-04

Applicant: Patrick Duvaut ,  Ehud Langberg

Inventor： Patrick Duvaut ,  Ehud Langberg

IPC: H04B1/38

CPC classification number: H04Q11/04 ,  H04Q2213/13039 ,  H04Q2213/13094 ,  H04Q2213/13204 ,  H04Q2213/13396

Abstract: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

Abstract translation: 本发明通过定义两个上游掩码（U1，U2）和两个下行掩码（D1，D2）并使用用于长距离数字用户线（LDSL）的掩码可选择系统来克服各种问题，其中唯一的调制解调器特征被激活 在握手期间，根据频谱兼容性自动检查物理层状态，因此，使用掩码可选择系统自动优化升压模式，在任何物理层噪声场景中选择上游/下游掩码的最佳组合。

公开(公告)号：US07272172B2

公开(公告)日：2007-09-18

申请号：US10714907

申请日：2003-11-18

Applicant: Patrick Duvaut ,  Ehud Langberg

Inventor： Patrick Duvaut ,  Ehud Langberg

IPC: H04B1/38

CPC classification number: H04Q11/04 ,  H04Q2213/13039 ,  H04Q2213/13094 ,  H04Q2213/13204 ,  H04Q2213/13396

Abstract: The present invention overcomes various problems by defining two upstream masks (U1, U2) and two downstream masks (D1, D2) and using a mask selectable system for the long reach digital subscriber line (LDSL), in which a unique modem feature is activated during handshake to automatically check for physical layer status in terms of spectral compatibility and, thus, automatically optimize the boosted mode with the use of the mask selectable system choose the best combination of upstream/downstream masks in any physical layer noise scenario.

Abstract translation: 本发明通过定义两个上行掩码（U 1，U 2）和两个下行掩码（D 1，D 2）并使用用于长距离数字用户线（LDSL）的掩码可选择系统来克服各种问题，其中唯一 调制解调器功能在握手期间被激活，以便在频谱兼容性方面自动检查物理层状态，因此使用掩模可选择系统自动优化升压模式，在任何物理层噪声场景中选择上游/下游屏蔽的最佳组合 。