公开(公告)号：US06310896B1

公开(公告)日：2001-10-30

申请号：US09174026

申请日：1998-10-16

Applicant: Ehud Langberg ,  Weimin Liu ,  Xiao Liu ,  William Scholtz

Inventor： Ehud Langberg ,  Weimin Liu ,  Xiao Liu ,  William Scholtz

IPC: H04J306

CPC classification number: H04L7/042 ,  H04L27/261 ,  H04L27/2655 ,  H04L27/2675

Abstract: A system and method are disclosed for synchronizing a predetermined repeated data sequence contained in a first data signal at a first sample rate with the same predetermined repeated data sequence contained in a second data signal at a second sample rate in a data communications device. The system preferably includes a digital signal processor operating pursuant to logic stored on a memory. The logic includes synchronization logic which reduces the first sample rate to a predetermined correlation sample rate using a first decimator, resulting in a first reduced data signal. The synchronization logic also reduces the second sample rate to the same predetermined correlation sample rate using a second decimator, resulting in a second reduced data signal. Finally, the synchronization logic determines a sequence offset between the predetermined repeated data sequence contained in the first reduced data signal and the predetermined repeated data sequence contained in the second reduced data signal using a correlator. This sequence offset is used to determine a time delay that is applied to the second data signal, thereby synchronizing the predetermined repeated data sequence contained in the first and second data sequences.

Abstract translation: 公开了一种系统和方法，用于使包含在第一采样率的第一数据信号中的预定重复数据序列与包含在数据通信设备中的第二采样率的第二数据信号中的相同预定重复数据序列同步。 该系统优选地包括根据存储在存储器上的逻辑操作的数字信号处理器。 逻辑包括同步逻辑，其使用第一抽取器将第一采样率降低到预定的相关采样率，从而产生第一缩减的数据信号。 同步逻辑还使用第二抽取器将第二采样率降低到相同的预定相关采样率，导致第二降低的数据信号。 最后，同步逻辑使用相关器确定包含在第一简化数据信号中的预定重复数据序列与包含在第二缩减数据信号中的预定重复数据序列之间的序列偏移。 该序列偏移用于确定施加到第二数据信号的时间延迟，从而使包含在第一和第二数据序列中的预定重复数据序列同步。

公开(公告)号：US5703904A

公开(公告)日：1997-12-30

申请号：US586008

申请日：1995-12-29

Applicant: Ehud Langberg

Inventor： Ehud Langberg

IPC: H03H21/00 ,  H04B3/23 ,  H04L25/03 ,  G06F17/10 ,  H04B1/10

CPC classification number: H03H21/0012 ,  H04L25/03146 ,  H04L25/03343 ,  H03H2021/007 ,  H03H2021/0074

Abstract: In a receiver system embodying the invention, the amplitude of the input signal is sensed so that when it exceeds a predetermined level, the adaptation of adaptive filters employed in the receiver is inhibited. In one embodiment of the invention the adaptation is inhibited for the extent of time that the sensed signal exceeds the predetermined level. In another embodiment of the invention, the adaptation is inhibited for a fixed period of time whenever the sensed signal exceeds the predetermined level. In still another embodiment of the invention, where the noise impulse has some repetitive pattern, an inhibiting signal is generated in anticipation of a repetitive noise impulse to inhibit adaptation of the adaptive filters during the period of time ("window") the noise impulse occurs.

Abstract translation: 在体现本发明的接收机系统中，感测输入信号的幅度，使得当超过预定电平时，禁止在接收机中使用的自适应滤波器的适配。 在本发明的一个实施例中，在感测信号超过预定水平的时间范围内禁止适配。 在本发明的另一实施例中，每当感测信号超过预定电平时，自适应被禁止固定的时间段。 在本发明的另一个实施例中，在噪声脉冲具有一些重复模式的情况下，产生抑制信号，以期在重复的噪声脉冲中抑制自适应滤波器在时间段（“窗口”）期间的适应性噪声脉冲发生 。

公开(公告)号：US08532147B2

公开(公告)日：2013-09-10

申请号：US13554861

申请日：2012-07-20

Applicant: William Scholtz ,  Ben Chan ,  Ehud Langberg ,  Shareq Rahman ,  Xy Chen ,  James Zhang

Inventor： William Scholtz ,  Ben Chan ,  Ehud Langberg ,  Shareq Rahman ,  Xy Chen ,  James Zhang

IPC: H04J1/02 ,  H04M11/00

CPC classification number: H04M3/4281 ,  H04M3/02 ,  H04M3/18 ,  H04M3/42365 ,  H04M7/006 ,  H04M2203/156

Abstract: A method and system are provided for preventing data loss in a VoIP system. In particular, during a VoIP call, it is determined whether incoming ringing on a POTS line causes an unacceptable level of signal loss or errors. If so, for subsequent VoIP calls, the CO handling calls to the POTS line is instructed to either answer each call with a busy signal or automatically forward calls to the POTS line to the VoIP line or other selected telephone. Calling returns to normal upon ending of the VoIP call. In this manner, incoming ringing on the POTS line does not result in call dropping or lengthy retraining processes.

Abstract translation: 提供了一种防止VoIP系统中的数据丢失的方法和系统。 特别地，在VoIP呼叫期间，确定POTS线上的输入振铃是否导致不可接受的信号丢失或错误的水平。 如果是这样，对于随后的VoIP呼叫，指示对POTS线路的CO处理呼叫以忙信号来应答每个呼叫，或者自动将呼叫转移到VoIP线路或其他所选电话的POTS线路。 呼叫结束时呼叫恢复正常。 以这种方式，POTS线路上的呼入不会导致呼叫丢失或冗长的再训练过程。

公开(公告)号：US07813434B2

公开(公告)日：2010-10-12

申请号：US11559772

申请日：2006-11-14

Applicant: Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

Inventor： Yan Wu ,  Lujing Cai ,  William Scholtz ,  Ehud Langberg

IPC: H04K1/10 ,  H04L27/28

CPC classification number: H04L27/2608 ,  H04L1/0006 ,  H04L1/0009 ,  H04L1/0057 ,  H04L1/0058 ,  H04L1/006 ,  H04L1/007 ,  H04L5/14

Abstract: Systems and methods for performing bit loading in a dual latency data transmission system. In a computer network, such as an XDSL-based network, carrier channels are allocated between two latency paths. Error sensitive information is transmitted over a latency path employing one or more forward error correction techniques. Latency sensitive information that is relatively more tolerant of errors is transmitted over the other latency path. Rather than employing the lowest coding gain for carrier channels having the two different latency paths, the highest coding gain for each path is used by applying different target S-N-R margins for carrier channels having different latency paths.

Abstract translation: 用于在双延迟数据传输系统中执行比特加载的系统和方法。 在诸如基于XDSL的网络的计算机网络中，在两个等待时间路径之间分配载波信道。 误差敏感信息通过采用一个或多个前向纠错技术的等待时间路径传输。 通过另一个等待时间路径发送相对更容忍错误的延迟敏感信息。 不是对具有两个不同等待时间路径的载波信道采用最低的编码增益，而是通过对具有不同等待时间路径的载波信道应用不同的目标S-N-R边缘来使用每个路径的最高编码增益。

公开(公告)号：US07352805B2

公开(公告)日：2008-04-01

申请号：US11282109

申请日：2005-11-18

Applicant: Ehud Langberg ,  Lujing Cai

Inventor： Ehud Langberg ,  Lujing Cai

IPC: H03H7/30

CPC classification number: H04L5/1438 ,  H04B17/0085 ,  H04L25/03012 ,  H04L25/03019 ,  H04L27/2602 ,  H04L27/2607 ,  H04L27/2628 ,  H04L27/265 ,  H04L2025/03414 ,  H04L2025/03445 ,  H04L2025/03585

Abstract: A method and system for enhancing reach-performance of a multi-carrier VDSL System estimates loop length, estimates maximum available bandwidth that can be utilized at that particular loop length, optimally selects an FFT size and sampling rate, and decides whether to apply a time domain equalization to its receiver and if so, selects a cyclic extension size. To minimize the implementation complexity, the sampling frequencies at receiver and transmitter are lowered to match the actual usable bandwidth. The FFT/IFFT sizes in the implementation are also required to set appropriately accordingly.

Abstract translation: 一种用于增强多载波VDSL系统的达到性能的方法和系统估计环路长度，估计可以在该特定环路长度下使用的最大可用带宽，最佳地选择FFT大小和采样率，并且决定是否应用时间 域均衡到其接收器，如果是，则选择循环扩展大小。 为了最小化实现复杂度，降低接收机和发射机的采样频率以匹配实际可用带宽。 执行中的FFT / IFFT大小也需要适当地进行设置。

公开(公告)号：US20050010853A1

公开(公告)日：2005-01-13

申请号：US10860286

申请日：2004-06-04

Applicant: Patrick Duvant ,  Ehud Langberg ,  Julien Pons ,  William Sholtz

Inventor： Patrick Duvant ,  Ehud Langberg ,  Julien Pons ,  William Sholtz

IPC: H03M13/25 ,  H04L1/00 ,  H03D3/22 ,  H03M13/03 ,  H04L27/22

CPC classification number: H04L1/006 ,  H03M13/255 ,  H03M13/256 ,  H03M13/635 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/007

Abstract: Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset of the remaining bits of the binary word may be encoded using trellis coded modulation (TCM) coding. The results of the boosted channel coding and the TCM coding may be mapped to one or more symbols. The one or more symbols then may be transmitted to a receiver using transmission techniques well known to those skilled in the art. The present invention finds particular benefit in digital subscriber line (DSL)-based systems in accord with the ITU G.992-1 Recommendation and similar standards.

Abstract translation: 这里公开了用于多电平信道编码的各种技术。 对于包括多个位的给定二进制字，最低有效位可以通过诸如turbo信道编码或低密度奇偶校验（LDPC）信道编码的增强编码技术来编码。 可以使用网格编码调制（TCM）编码对二进制字的剩余位的子集进行编码。 增强的信道编码和TCM编码的结果可以映射到一个或多个符号。 然后可以使用本领域技术人员公知的传输技术将一个或多个符号发送到接收机。 本发明在符合ITU G.992-1建议书和类似标准的基于数字用户线路（DSL）的系统中特别有益。

公开(公告)号：US06829251B2

公开(公告)日：2004-12-07

申请号：US10315743

申请日：2002-12-10

Applicant: Patrick Duvaut ,  Ehud Langberg ,  William Scholtz ,  Laurent Pierrugues ,  Oliver Moreno

Inventor： Patrick Duvaut ,  Ehud Langberg ,  William Scholtz ,  Laurent Pierrugues ,  Oliver Moreno

IPC: H04J116

CPC classification number: H04L12/66 ,  H04L27/2608 ,  H04L27/2647 ,  H04L47/10 ,  H04L47/38 ,  H04M11/062 ,  H04Q2213/13039 ,  H04Q2213/13176 ,  H04Q2213/1319 ,  H04Q2213/13191 ,  H04Q2213/13209 ,  H04Q2213/13389

Abstract: Systems and methods for increasing data capacity in communication systems is presented. In one embodiment, line characteristics are determined, and a downstream bandwidth is adaptively allocated in response to the determined line characteristics. In this regard, the upstream and downstream bandwidths may be seen as adaptively changing as a function of line characteristics.

Abstract translation: 介绍了增加通信系统数据容量的系统和方法。 在一个实施例中，确定线路特性，响应于所确定的线路特性，自适应地分配下行带宽。 在这方面，上行和下行带宽可以看作是根据线路特性的自适应变化。

公开(公告)号：US07457368B2

公开(公告)日：2008-11-25

申请号：US10860286

申请日：2004-06-04

Applicant: Patrick Duvaut ,  Ehud Langberg ,  Julien Pons ,  William Scholtz

Inventor： Patrick Duvaut ,  Ehud Langberg ,  Julien Pons ,  William Scholtz

IPC: H04L5/12

CPC classification number: H04L1/006 ,  H03M13/255 ,  H03M13/256 ,  H03M13/635 ,  H04L1/0041 ,  H04L1/0066 ,  H04L1/007

Abstract: Disclosed herein are various techniques for multilevel channel coding. For a given binary word comprising a plurality of bits, the least-significant bit may be encoded by a boosted coding technique, such as turbo channel coding or low density parity check (LDPC) channel coding. A subset of the remaining bits of the binary word may be encoded using trellis coded modulation (TCM) coding. The results of the boosted channel coding and the TCM coding may be mapped to one or more symbols. The one or more symbols then may be transmitted to a receiver using transmission techniques well known to those skilled in the art. The present invention finds particular benefit in digital subscriber line (DSL)-based systems in accord with the ITU G.922.1 Recommendation and similar standards.

Abstract translation: 这里公开了用于多电平信道编码的各种技术。 对于包括多个位的给定二进制字，最低有效位可以通过诸如turbo信道编码或低密度奇偶校验（LDPC）信道编码的增强编码技术来编码。 可以使用网格编码调制（TCM）编码对二进制字的剩余位的子集进行编码。 增强的信道编码和TCM编码的结果可以映射到一个或多个符号。 然后可以使用本领域技术人员公知的传输技术将一个或多个符号发送到接收机。 本发明在符合ITU G.922.1建议书和类似标准的基于数字用户线路（DSL）的系统中具有特别的益处。

公开(公告)号：US07457353B2

公开(公告)日：2008-11-25

申请号：US10849569

申请日：2004-05-20

Applicant: Patrick Duvaut ,  Ehud Langberg ,  Albert Rapaport ,  William Sholtz ,  Faina Shmulyian

Inventor： Patrick Duvaut ,  Ehud Langberg ,  Albert Rapaport ,  William Sholtz ,  Faina Shmulyian

IPC: H04B1/38 ,  H04B3/20 ,  H04M9/08

CPC classification number: H04L27/2602 ,  H04L27/2614

Abstract: The present invention is directed to implementing theoretical foundations of frequency domain methods aiming to locally decrease the impact of aggregate side lobes of a few discrete frequency tones, in the vicinity of other “victim” frequencies. The family of frequency methods referred to makes use of one or more “canceller tones.” The “canceller tones” loads are optimized to minimize the aggregate power in the neighborhood of the victim frequencies. An exemplary method for decreasing an impact of aggregate side lobes of one or more discrete frequency tones in the vicinity of one or more victim tones comprises the steps of calculating an aggregate power of one or more side lobes of one or more disturber tones within a victim bandwidth; determining at least one optimal load to minimize the aggregate power wherein the at least one optimal load comprises a linear combination of the one or more disturber tones; and applying the at least one optimal load to one or more canceller tones for minimizing the impact of the one or more side lobes of the one or more disturber tones.

Abstract translation: 本发明旨在实现频域方法的理论基础，旨在局部地减小在其他“受害者”频率附近的几个离散频率的聚集旁瓣的影响。 所提及的频率方法族使用一个或多个“消除音”。 优化“消除音”负载以最小化受害者频率附近的总功率。 减少一个或多个受害音调附近的一个或多个离散频率音调的聚集旁瓣的影响的示例性方法包括以下步骤：计算受害者中一个或多个干扰音的一个或多个旁波的总功率 带宽; 确定至少一个最佳负载以最小化所述总功率，其中所述至少一个最佳负载包括所述一个或多个干扰调制音的线性组合; 以及将所述至少一个最佳负载应用于一个或多个消除器音调，以最小化一个或多个干扰音调的一个或多个旁瓣的影响。

公开(公告)号：US20080080601A1

公开(公告)日：2008-04-03

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 (UI, U2) and two downstream masks (DI, 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（UI，U 2）和两个下行掩码（DI，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，其中唯一的调制解调器特征 在握手期间被激活以在频谱兼容性方面自动检查物理层状态，并且因此利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/下游掩码的最佳组合。