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    HYBRID FULL DUPLEX COMMUNICATIONS IN A RADIO FREQUENCY CABLE NETWORK
    61.
    发明申请
    HYBRID FULL DUPLEX COMMUNICATIONS IN A RADIO FREQUENCY CABLE NETWORK 审中-公开

    公开(公告)号：US20190394015A1

    公开(公告)日：2019-12-26

    申请号：US16559403

    申请日：2019-09-03

    Applicant: CABLE TELEVISION LABORATORIES, INC

    Inventor： Belal Hamzeh ,  Thomas H. Williams ,  Daniel Rice ,  Luis Alberto Campos

    IPC: H04L5/14 ,  H04L5/00 ,  H04L12/28 ,  H04N21/61

    Abstract: Systems and methods presented herein provide for improved duplex communications in an RF cable network comprising a plurality of CMs. In one embodiment, a system includes a CMTS operable to transmit downstream communications to the CMs and to process upstream communications from the CMs. The system also includes a duplex RF communication path between the CMTS and the CMs. The CMTS is further operable to transmit a control signal that directs a first of the CMs to transmit, to direct the remaining CMs to receive the transmission from the first CM, to direct the CMs to report received power levels of the transmission from the first CM, and to calculate RF isolations of the remaining CMs with respect to the first CM based on the reported power levels.

    SYSTEMS AND METHODS FOR ULTRA RELIABLE LOW LATENCY COMMUNICATIONS
    62.
    发明申请
    SYSTEMS AND METHODS FOR ULTRA RELIABLE LOW LATENCY COMMUNICATIONS 审中-公开

    公开(公告)号：US20190280763A1

    公开(公告)日：2019-09-12

    申请号：US16353813

    申请日：2019-03-14

    Applicant: CABLE TELEVISION LABORATORIES, INC

    Inventor： Peter Paul Smyth ,  Lin Cheng ,  Jim O'Connor ,  Eric Winkelman ,  Thomas H. Williams ,  Steve Arendt ,  Belal Hamzeh

    IPC: H04B7/185

    Abstract: A communication system includes an earth station configured to receive a downlink transmission from a satellite and transmit an uplink transmission to the satellite. The communication system further includes a server in operable communication with the earth station, a beacon detector in operable communication with the server, an access point configured to operate within a proximity of the earth station, and a beacon transmitter disposed within close proximity to the access point. The beacon transmitter is configured to transmit a beacon signal to one or more of the server and the beacon detector. The beacon signal uniquely identifies the access point. The server is configured to implement a measurement-based protection scheme with respect to at least one of the downlink transmission and the uplink transmission.

    Orthogonal signal demodulation
    67.
    发明授权
    Orthogonal signal demodulation 有权

    公开(公告)号：US09660855B2

    公开(公告)日：2017-05-23

    申请号：US13841313

    申请日：2013-03-15

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams ,  Luis Alberto Campos

    IPC: H04L27/26

    CPC classification number: H04L27/265 ,  H04L27/2647

    Abstract: A modulation transmission technique comprises placing orthogonal subcarriers across an arbitrary-wide band of frequencies without a fixed pre-defined center frequency. Receivers demodulate only the sub-group of subcarriers in which they are to receive data. Thus a broadcast service with many audio programs could send signals across a wide band and receivers would only demodulate the audio channel that the user or users wanted to hear. This saves energy which is important for battery powered devices. A transform bandwidth smaller than the transform bandwidth of the transmitter is used that encompasses the receivers pass band, plus the 2 transition bands (upper and lower) of the linear filter. This technique maintains orthogonality between subcarriers. The subcarriers in the pass band are utilized and the subcarriers in the transition bands are discarded. The orthogonal subcarriers may include both orthogonal frequency division multiplexed and pulse amplitude modulated signals. A notch filter may be included in the receiver to remove unwanted non-orthogonal signals such as a television signal or other interference.

    Analysis of captured random data signals to measure linear and nonlinear distortions
    69.
    发明授权
    Analysis of captured random data signals to measure linear and nonlinear distortions 有权
    分析捕获的随机数据信号来测量线性和非线性失真

    公开(公告)号：US09590696B2

    公开(公告)日：2017-03-07

    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 ,  H04B10/079 ,  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。

    ISOLATING AN UPSTREAM NOISE SOURCE IN A CABLE TELEVISION NETWORK
    70.
    发明申请
    ISOLATING AN UPSTREAM NOISE SOURCE IN A CABLE TELEVISION NETWORK 有权
    在电缆电视网络中分离上游噪声源

    公开(公告)号：US20160112734A1

    公开(公告)日：2016-04-21

    申请号：US14864610

    申请日：2015-09-24

    Applicant: Cable Television Laboratories, Inc.

    Inventor： Thomas H. Williams ,  David Hunter

    IPC: H04N21/24 ,  H04N21/647 ,  H04N21/61 ,  H04N21/442

    CPC classification number: H04H20/78 ,  H04H20/12 ,  H04L1/004 ,  H04L1/0057 ,  H04N7/102 ,  H04N21/442 ,  H04N21/6118 ,  H04N21/6168 ,  H04N21/64738

    Abstract: Systems and methods presented herein provide for isolating an upstream noise source in a cable television network. In one embodiment, a cable television network is communicatively coupled to a plurality of CPEs through a node. The cable television network comprises a CMTS with a CPE polling module and a noise monitor communicatively coupled to the CMTS through the node of the cable television network. The noise monitor is operable in a band of frequencies unused by the CPEs for upstream communications to determine when noise in the band breaches a threshold level, and to indicate when the noise breaches the threshold level to the CPE polling module. The CPE polling module then polls each of the CPEs to retrieve transmit power levels and locations of the CPEs, and identifies the first CPE with the intermittently noisy connection based on the retrieved transmit power level and location of the first CPE.

    Abstract translation: 本文提出的系统和方法提供用于隔离有线电视网络中的上游噪声源。 在一个实施例中，有线电视网络通过节点通信地耦合到多个CPE。 有线电视网络包括具有CPE轮询模块的CMTS和通过有线电视网络的节点通信地耦合到CMTS的噪声监视器。 噪声监测器可在用于上行通信的CPE未使用的频带中操作，以确定频带中的噪声何时违反阈值水平，以及指示噪声何时将阈值水平破坏到CPE轮询模块。 CPE轮询模块然后轮询每个CPE以检索CPE的发射功率电平和位置，并且基于检索的第一CPE的发射功率电平和位置来识别具有间歇性噪声连接的第一CPE。

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