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    Technique for improving multiple-channel multi-tone transmissions
    31.
    发明授权
    Technique for improving multiple-channel multi-tone transmissions 失效
    改善多声道多音调传输的技术

    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。

    Method and system for preventing data loss in a real-time computer system
    32.
    发明授权
    Method and system for preventing data loss in a real-time computer system 有权
    用于防止实时计算机系统中的数据丢失的方法和系统

    公开(公告)号：US07522638B2

    公开(公告)日：2009-04-21

    申请号：US10430278

    申请日：2003-05-07

    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。

    Adaptive RFI canceller for DSL
    34.
    发明授权
    Adaptive RFI canceller for DSL 有权

    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.

    Dual echo canceller and method for increasing dynamic range of a receiver
    36.
    发明授权
    Dual echo canceller and method for increasing dynamic range of a receiver 有权
    双回波消除器和增加接收机动态范围的方法

    公开(公告)号：US06741701B1

    公开(公告)日：2004-05-25

    申请号：US10014315

    申请日：2001-12-11

    Applicant: Ehud Barak ,  Ehud Langberg

    Inventor： Ehud Barak ,  Ehud Langberg

    IPC: H04M100

    CPC classification number: H04B3/237

    Abstract: In accordance with one aspect of the invention, an apparatus is provided having a transmit path and a receive path for communicating data. The apparatus includes an analog to digital (A/D) converter that is disposed in communication with the receive path. The A/D converter operates at a first sampling rate, and it converts a received analog signal into a digital signal. The apparatus also includes a first echo canceller that is in communication with the receive path and that operates at the first sampling rate for estimating a first portion of an echo signal leaking from the transmit path to the receive path. The estimated echo signal is subtracted from the digital signal. The amplitude of the digital signal is increased by a digital gain. A decimator is disposed in communication with the receive path, whereby the decimator filters the digital signal that has a first sampling rate and emits a signal output at a reduced sampling rate. Thereafter, a second echo canceller is in communication with the output from the decimator for generating an echo replica estimation of a second portion of echo signal leaking from said transmit path to said receive path. The second portion of echo signal leaking from said transmit path to said receive path is subtracted from the output from the decimator. The result is a substantially echo-free digital data signal.

    Abstract translation: 根据本发明的一个方面，提供一种具有用于传送数据的发送路径和接收路径的装置。 该装置包括与接收路径通信设置的模数（A / D）转换器。 A / D转换器以第一采样率工作，并将接收到的模拟信号转换为数字信号。 该装置还包括与接收路径通信并且以第一采样率操作以估计从发射路径泄漏到接收路径的回波信号的第一部分的第一回波消除器。 从数字信号中减去估计的回波信号。 数字信号的幅度增加数字增益。 抽取器被布置成与接收路径通信，由此抽取器对具有第一采样率的数字信号进行滤波并以降低的采样率发射信号输出。 此后，第二回波消除器与来自抽取器的输出通信，用于产生从所述发送路径泄漏到所述接收路径的回波信号的第二部分的回波复制估计。 从所述抽取器的输出中减去从所述发送路径泄漏到所述接收路径的回波信号的第二部分。 结果是基本上无回波的数字数据信号。

    System and method for echo cancellation over asymmetric spectra
    37.
    发明授权
    System and method for echo cancellation over asymmetric spectra 有权
    用于不对称光谱回波消除的系统和方法

    公开(公告)号：US06421377B1

    公开(公告)日：2002-07-16

    申请号：US09164552

    申请日：1998-10-01

    Applicant: Ehud Langberg ,  Xueming Lin ,  Weimin Liu ,  Wenye Yang

    Inventor： Ehud Langberg ,  Xueming Lin ,  Weimin Liu ,  Wenye Yang

    IPC: H04B138

    CPC classification number: H04B3/23 ,  H04L27/2647

    Abstract: The present invention generally relates to echo cancellation over an asymmetric transmission and receiving spectra. An apparatus is provided having a transmit path and a receive path, with an adaptive echo canceler disposed therebetween, for communicating data within a first bandwidth and a second bandwidth respectively. A first decimator is disposed between the transmit path and the echo canceler circuit and filters an incoming signal having a first sampling rate and emits a signal output at a second, reduced sampling rate. A second decimator is disposed along said receive path and filters an incoming signal and emits a signal output at a reduced sampling rate. An adder is disposed to subtract the output of the adaptive echo canceler from output of the second decimator to generate a received signal that is substantially free of echo.

    Abstract translation: 本发明一般涉及不对称传输和接收光谱的回波消除。 提供一种具有发送路径和接收路径的装置，其间设置有自适应回波消除器，用于分别在第一带宽和第二带宽内传送数据。 第一抽取器设置在发射路径和回波抵消器电路之间，并且对具有第一采样率的输入信号进行滤波，并以第二次降低的采样率发射信号输出。 沿着所述接收路径设置第二抽取器，并且对输入信号进行滤波并以降低的采样率发射信号输出。 设置加法器以从第二抽取器的输出中减去自适应回波消除器的输出，以产生基本上没有回波的接收信号。

    System and method for external timing using a complex rotator
    38.
    发明授权
    System and method for external timing using a complex rotator 失效
    使用复数旋转器进行外部定时的系统和方法

    公开(公告)号：US06327666B1

    公开(公告)日：2001-12-04

    申请号：US09014155

    申请日：1998-01-27

    Applicant: Ehud Langberg ,  Richard Gut ,  Chenshu Wang

    Inventor： Ehud Langberg ,  Richard Gut ,  Chenshu Wang

    IPC: G06F104

    CPC classification number: H04J3/0685 ,  H03L7/08 ,  H04L7/033 ,  H04L7/0334

    Abstract: An improvement to system timing and synchronization in a digital transceiver allows the synchronization of a transceiver located at a central office to a network or system clock without the use of any additional transmitted bits or additional external circuitry. The system allows a transceiver to achieve timing and synchronization lock to a system master clock, such as a T1 or E1 clock, by operating on the two level input clock with a complex rotator to develop an error signal which allows a phase locked loop circuit to drive a frequency synthesizing device, which in turn drives a system clock. The system clock provides an input to a complex generator, which in turn develops a complex rotation function. The complex rotation function allows the transceiver clock to synchronize to the network master clock.

    Abstract translation: 对数字收发器中的系统定时和同步的改进允许位于中心局的收发器与网络或系统时钟的同步，而不使用任何附加的发送位或附加的外部电路。 该系统允许收发器通过在具有复数旋转器的两级输入时钟上操作来产生对系统主时钟（例如T1或E1时钟）的定时和同步锁定，以产生允许锁相环电路 驱动频率合成装置，从而驱动系统时钟。 系统时钟为复合发电机提供输入，这又产生复杂的旋转功能。 复合旋转功能允许收发器时钟与网络主时钟同步。

    Rate adaptive digital subscriber line (RADSL) modem
    39.
    发明授权
    Rate adaptive digital subscriber line (RADSL) modem 失效
    速率自适应数字用户线（RADSL）调制解调器

    公开(公告)号：US6167034A

    公开(公告)日：2000-12-26

    申请号：US16994

    申请日：1998-02-02

    Applicant: Ehud Langberg ,  William Henry Scholtz

    Inventor： Ehud Langberg ,  William Henry Scholtz

    IPC: H04L5/02 ,  H04L5/14 ,  H04L7/04 ,  H04J1/00 ,  H04B3/10

    CPC classification number: H04L7/041 ,  H04L5/023 ,  H04L5/143 ,  H04L7/043 ,  H04L7/044

    Abstract: The invention provides a transceiver which is preferably used for high speed communications between a customer location and a central office over a subscriber line. The transceiver uses a pseudorandom noise generator both to provide a correlation for a complementary transceiver to use in achieving synchronization and as a way to transmit data in an extremely robust fashion. In addition, the transceiver uses frequency domain multiplexing so that downstream data and upstream data are transmitted by their respective transceivers in completely separate and distinct frequency bands. In order to achieve high data transfer rates, the transceivers can operate in an asymmetrical manner, whereby either (but, typically, the central office) transceiver can transmit data at a higher rate than the other transceiver.

    Abstract translation: 本发明提供一种收发器，其优选地用于在用户线路上的客户位置和中心局之间的高速通信。 收发器使用伪随机噪声发生器来提供互补收发器的相关性，以用于实现同步，并且作为以非常鲁棒的方式传输数据的方式。 此外，收发器使用频域复用，使得下行数据和上行数据由它们各自的收发器以完全分离和不同的频带发送。 为了实现高数据传输速率，收发器可以以非对称方式操作，由此（但是，通常，中心局）收发器可以以比另一个收发器更高的速率发送数据。

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