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    Energy monitoring in a communciation link
    12.
    发明授权
    Energy monitoring in a communciation link 有权

    公开(公告)号：US09622097B2

    公开(公告)日：2017-04-11

    申请号：US14621842

    申请日：2015-02-13

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams

    IPC: H04B3/46 ,  H04B17/00 ,  H04Q1/20 ,  H04W24/08 ,  H04N21/426 ,  H04N21/61

    CPC classification number: H04W24/08 ,  H04B3/46 ,  H04N21/42676 ,  H04N21/6118

    Abstract: Systems and methods presented herein provide for monitoring of noise and other interfering energy on a communication link. One system includes an interface coupled to the communication link to receive a signal conveyed over the communication link. The system also includes a monitor operable to: track energy across a frequency spectrum of the signal conveyed over the communication link for a predetermined period of time; flag, at intervals of the predetermined period of time, energy levels across the frequency spectrum of the signal that breach a threshold energy level to identify where in the frequency spectrum a breach of the threshold energy level occurs; and add the flags to determine how long the threshold energy level was breached during the predetermined period of time.

    Radio frequency leakage detection in a cable plant
    13.
    发明授权
    Radio frequency leakage detection in a cable plant 有权
    电缆厂的射频泄漏检测

    公开(公告)号：US09455766B2

    公开(公告)日：2016-09-27

    申请号：US14812916

    申请日：2015-07-29

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams ,  Colin Justis

    IPC: H04B3/46 ,  H04B1/16 ,  G01R31/08 ,  G01S5/02 ,  G01R31/02

    CPC classification number: H04B3/46 ,  G01R31/025 ,  G01R31/08 ,  G01R31/083 ,  G01S5/02 ,  H04B1/16

    Abstract: Embodiments described provide detection of RF leaks in a coaxial cable of a cable plant. One embodiment comprises a mobile device that includes an antenna, a quadrature demodulator, and a controller. The antenna receives an RF signal from an RF leak in the coaxial cable. The quadrature demodulator demodulates the RF signal to generate IQ data. The controller determines changes in a phase angle of the RF signal based on the IQ data generated as the mobile device is in motion, and identifies that the mobile device is travelling toward the RF leak responsive to determining that the phase angle is advancing. The controller identifies that the mobile device is travelling away from the RF leak responsive to determining that the phase angle is retarding.

    Abstract translation: 所描述的实施例提供了对电缆设备的同轴电缆中的RF泄漏的检测。 一个实施例包括包括天线，正交解调器和控制器的移动设备。 天线从同轴电缆中的RF泄漏接收RF信号。 正交解调器解调RF信号以产生IQ数据。 控制器基于随着移动设备在运动中生成的IQ数据来确定RF信号的相位角的变化，并且响应于确定相位角正在前进，识别移动设备正朝向RF泄漏行进。 响应于确定相位角正在延迟，控制器识别移动设备正在远离RF泄漏。

    TRANSMISSION OPPORTUNITY SKIPPING FOR BURST NOISE PROTECTION
    14.
    发明申请
    TRANSMISSION OPPORTUNITY SKIPPING FOR BURST NOISE PROTECTION 有权
    传输机会防止爆发噪音

    公开(公告)号：US20150304067A1

    公开(公告)日：2015-10-22

    申请号：US14259108

    申请日：2014-04-22

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams ,  Belal Hamzeh

    IPC: H04L1/00

    CPC classification number: H04L1/0027 ,  H04L1/003 ,  H04L1/0041 ,  H04L1/0042 ,  H04L1/0057 ,  H04L5/0044 ,  H04L5/0082

    Abstract: Skipping, spreading or otherwise metering signaling across multiple transmission opportunities is contemplated. The contemplated signal processing may be beneficial in ameliorating the influence of burst noise and other interferences on signal transmissions. The contemplated signal processing may be operable to facilitate supplementing and/or replacing other error correction techniques aimed at reducing signaling interference.

    Abstract translation: 考虑跨多个传输机会跳过，传播或以其他方式计量信令。 预期的信号处理可以有利于改善突发噪声和其他干扰对信号传输的影响。 预期的信号处理可以可操作以便于补充和/或替换旨在减少信令干扰的其他纠错技术。

    Analysis of Captured Random Data Signals to Measure Linear and Nonlinear Distortions
    15.
    发明申请
    Analysis of Captured Random Data Signals to Measure Linear and Nonlinear Distortions 有权
    捕获的随机数据信号测量线性和非线性失真的分析

    公开(公告)号：US20150280780A1

    公开(公告)日：2015-10-01

    申请号：US14735495

    申请日：2015-06-10

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams ,  Luis Alberto Campos

    IPC: H04B3/46 ,  H04L12/26 ,  H04W24/08

    CPC classification number: H04B3/46 ,  H04B10/07953 ,  H04B10/6163 ,  H04L43/08 ,  H04W24/08

    Abstract: A method to capture random data signals at an end point in a broadband network and process them via digital signal processing (DSP) techniques to determine both linear distortions and nonlinear distortions. In a distribution network, such as a tree and branch cable network, the location of the impairment addition can be identified by determining location of terminals have a distortion and locations of terminals that do not have a distortion. Linear distortions may be determined by an autocorrelation of the captured signal with itself. Nonlinear distortions may be determined by processing measured energy in a vacant band with manufactured energy in the vacant band. If a vacant band is not available, one can be created by demodulating a signal occupying the band, and subtracting the demodulated signal from the measured signal plus interference in a band, leaving only the interference.

    Abstract translation: 一种在宽带网络终端捕获随机数据信号的方法，并通过数字信号处理（DSP）技术对其进行处理，以确定线性失真和非线性失真。 在诸如树和分支电缆网络的分配网络中，可以通过确定终端的位置具有失真和不具有失真的终端的位置来识别损害附加的位置。 线性失真可以通过捕获的信号与其自身的自相关来确定。 可以通过在空带中制造能量的空带中处理测量的能量来确定非线性失真。 如果空闲频带不可用，可以通过解调占用频带的信号，并从测量信号中减去解调信号加上频带中的干扰来创建，只留下干扰。

    SIGNAL NOISE ESTIMATION
    16.
    发明申请
    SIGNAL NOISE ESTIMATION 有权
    信号噪声估计

    公开(公告)号：US20140254407A1

    公开(公告)日：2014-09-11

    申请号：US13931841

    申请日：2013-06-29

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams

    IPC: H04W24/06

    CPC classification number: H04W24/06 ,  H04L5/0048 ,  H04L25/022 ,  H04L25/0232 ,  H04L27/2647 ,  H04L27/2657

    Abstract: Estimation of noise within signaling is contemplated. The noise estimation may be beneficial in detecting noise within signaling in order to facilitate error correction or other corrective measures without having to process transmitted data being transmitted within the signaling. The noise estimation may be based on pilot tones included within frequency division multiplexed signaling.

    Abstract translation: 考虑了信令内的噪声估计。 噪声估计可以有益于检测信令内的噪声，以便促进纠错或其他纠正措施，而不必处理在信令内传输的传输数据。 噪声估计可以基于包括在频分复用信令内的导频音。

    TRANSMISSION OPPORTUNITY SCHEDULING
    17.
    发明申请
    TRANSMISSION OPPORTUNITY SCHEDULING 有权
    传输机会调度

    公开(公告)号：US20140219293A1

    公开(公告)日：2014-08-07

    申请号：US13759908

    申请日：2013-02-05

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams ,  Matthew D. Schmitt

    IPC: H04L5/00

    CPC classification number: H04W28/044 ,  H04L5/0005 ,  H04L5/0071 ,  H04L5/0073 ,  H04W72/1231 ,  H04W74/085

    Abstract: Scheduling of transmission opportunities to prevent collisions is contemplated. The transmission opportunities may be scheduled for terminal units where transmissions of one terminal unit may collide or otherwise interfere with transmissions of another terminal unit. The transmission opportunities may be scheduled according to a time-frequency grid to prevent collisions in a time domain and/or a frequency domain.

    Abstract translation: 考虑了传输机会的调度以防止冲突。 可以对终端单元调度传输机会，其中一个终端单元的传输可能与另一个终端单元的传输相冲突或以其他方式干扰。 可以根据时间频率网格来调度传输机会，以防止时域和/或频域中的冲突。

    SYSTEMS AND METHODS FOR MULTI-CARRIER SIGNAL ECHO MANAGEMENT USING PSEUDO-EXTENSIONS
    19.
    发明申请
    SYSTEMS AND METHODS FOR MULTI-CARRIER SIGNAL ECHO MANAGEMENT USING PSEUDO-EXTENSIONS 有权

    公开(公告)号：US20230115010A1

    公开(公告)日：2023-04-13

    申请号：US17967560

    申请日：2022-10-17

    Applicant: CABLE TELEVISION LABORATORIES, INC.

    Inventor： Thomas H. Williams ,  Gregory Charles White

    IPC: H04L27/26 ,  H04L1/00 ,  H04L25/03

    Abstract: A receiver is configured to capture a plurality of linearly distorted OFDM symbols transmitted over a signal path. The receiver forms the captured OFDM symbols into an overlapped compound data block that includes payload data and at least one pseudo-extension, processes the overlapped compound block with circular convolution in the time domain using an inverse channel response, or frequency domain equalization, to produce an equalized compound block, and discards end portions of the equalized block to produce a narrow equalized block. The end portion corresponds with the pseudo-extension, and the narrow block corresponds with the payload data. The receiver cascades multiple narrow equalized blocks to form a de-ghosted signal stream of OFDM symbols. The OFDM symbols may be OFDM or OFDMA, and may or may not include a cyclic prefix, which will have a different length from the pseudo-extension.

    Systems and methods for multi-carrier signal echo management using pseudo-extensions
    20.
    发明授权
    Systems and methods for multi-carrier signal echo management using pseudo-extensions 有权

    公开(公告)号：US11476975B2

    公开(公告)日：2022-10-18

    申请号：US17315854

    申请日：2021-05-10

    Applicant: CABLE TELEVISION LABORATORIES, INC.

    Inventor： Thomas H. Williams ,  Gregory Charles White

    IPC: H04J11/00 ,  H04L1/00 ,  H04L27/26 ,  H04L25/03 ,  H04W72/04 ,  H04B1/707

    Abstract: A receiver is configured to capture a plurality of linearly distorted OFDM symbols transmitted over a signal path. The receiver forms the captured OFDM symbols into an overlapped compound data block that includes payload data and at least one pseudo-extension, processes the overlapped compound block with circular convolution in the time domain using an inverse channel response, or frequency domain equalization, to produce an equalized compound block, and discards end portions of the equalized block to produce a narrow equalized block. The end portion corresponds with the pseudo-extension, and the narrow block corresponds with the payload data. The receiver cascades multiple narrow equalized blocks to form a de-ghosted signal stream of OFDM symbols. The OFDM symbols may be OFDM or OFDMA, and may or may not include a cyclic prefix, which will have a different length from the pseudo-extension.

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