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    Systems and methods for multi-carrier signal echo management using pseudo-extensions
    42.
    发明授权
    Systems and methods for multi-carrier signal echo management using pseudo-extensions 有权

    公开(公告)号：US10476631B2

    公开(公告)日：2019-11-12

    申请号：US15833832

    申请日：2017-12-06

    Applicant: CABLE TELEVISION LABORATORIES, INC

    Inventor： Thomas H. Williams ,  Gregory Charles White

    IPC: H04W72/04 ,  H04L1/00 ,  H04L27/26 ,  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.

    Hybrid full duplex communications in a radio frequency cable network
    43.
    发明授权
    Hybrid full duplex communications in a radio frequency cable network 有权

    公开(公告)号：US10432388B2

    公开(公告)日：2019-10-01

    申请号：US16175008

    申请日：2018-10-30

    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 ,  H04B3/32 ,  H04B3/487

    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.

    Hybrid full duplex communications in a radio frequency cable network
    47.
    发明授权
    Hybrid full duplex communications in a radio frequency cable network 有权

    公开(公告)号：US10148408B2

    公开(公告)日：2018-12-04

    申请号：US15700951

    申请日：2017-09-11

    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.

    Signal power reduction systems and methods
    48.
    发明授权
    Signal power reduction systems and methods 有权

    公开(公告)号：US10044405B2

    公开(公告)日：2018-08-07

    申请号：US15345326

    申请日：2016-11-07

    Applicant: CABLE TELEVISION LABORATORIES, INC

    Inventor： Thomas H. Williams ,  Gregory Charles White

    IPC: H04L5/12 ,  H04B3/04 ,  H04L27/00 ,  H04L27/04 ,  H04L27/20 ,  H04L27/34

    Abstract: A method of reducing transmission power for an encoded data stream includes the steps of receiving an incoming data stream having equal probability for a plurality of incoming data bits, assigning a symbol scheme to the received data bits of the incoming data stream according to probabilities of occurrence of individual ones of the received data bits, and transmitting an outgoing data stream according to the assigned symbol scheme having a second average transmit power, different than the first average transmit power, for a plurality of outgoing symbols.

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