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公开(公告)号：US20160212657A1
公开(公告)日：2016-07-21
申请号：US15083126
申请日：2016-03-28
Applicant: Cable Television Laboratories, Inc.
Inventor： Thomas H. Williams , Matthew D. Schmitt
CPC classification number: H04W74/085 , H04L5/0005 , H04L5/0071 , H04L5/0073 , H04W72/1231
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。
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公开(公告)号：US09300458B2
公开(公告)日：2016-03-29
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。
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公开(公告)号：US20160080086A1
公开(公告)日：2016-03-17
申请号：US14486297
申请日：2014-09-15
Applicant: Cable Television Laboratories, Inc.
Inventor： Luis Alberto Campos , Alireza Babaei , Thomas H. Williams
IPC: H04B10/2575 , H04B10/50
CPC classification number: H04B10/1141 , H04B10/1121
Abstract: Systems and methods presented herein provide for improved access to data. In one embodiment, a communication system includes an RF communication link that is operable to receive first communications from a mobile device (e.g., a cell phone, tablet computer, laptop computer, or other “user equipment”). The communication system also includes a processor operable to determine a location of the mobile device based on the first communications and a plurality of directional communication links. Each directional communication link is operable to transfer data to the mobile device based on the location of the mobile device as determined by the processor. The processor is also operable to coordinate the transfer of data from each of the directional communication links to the mobile device.
Abstract translation: 本文提出的系统和方法提供了对数据的改进访问。 在一个实施例中，通信系统包括RF通信链路，其可操作以从移动设备（例如，蜂窝电话，平板计算机，膝上型计算机或其他“用户设备”）接收第一通信。 通信系统还包括可操作以基于第一通信和多个定向通信链路来确定移动设备的位置的处理器。 每个定向通信链路可操作以基于由处理器确定的移动设备的位置将数据传送到移动设备。 处理器还可操作以协调从每个定向通信链路到移动设备的数据传输。
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公开(公告)号：US09225387B2
公开(公告)日：2015-12-29
申请号：US14184619
申请日：2014-02-19
Applicant: Cable Television Laboratories, Inc.
Inventor： Thomas H. Williams , Belal Hamzeh
Abstract: A method to test a signal path with vacant bandwidth by sending a test signal twice and processing two resulting nonlinear distortion signals captured in the vacant bands to determine presence of nonlinear distortion. If the signals correlate, the energy in the vacant bands is nonlinear distortion. If the test signal is sent followed by an inverse (in time-domain) of itself, and a resulting correlation peak is negative, the nonlinear distortion is determined to have been created by odd-order nonlinear distortion.
Abstract translation: 通过发送测试信号两次来测试具有空闲带宽的信号路径的方法，并处理在空闲频带中捕获的两个产生的非线性失真信号，以确定非线性失真的存在。 如果信号相关，则空位带中的能量是非线性失真。 如果发送测试信号后跟本身的反向（在时域中），并且所得到的相关峰值为负，则非线性失真被确定为由奇次非线性失真产生。
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公开(公告)号：US20230208472A1
公开(公告)日：2023-06-29
申请号：US18114889
申请日：2023-02-27
Applicant: CABLE TELEVISION LABORATORIES, INC.
Inventor： Thomas H. Williams , Gregory Charles White
CPC classification number: H04B3/04 , H04L27/0008 , H04L27/04 , H04L27/20 , H04L27/3411
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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Patent Agency Ranking
公开(公告)号：US11184202B2
公开(公告)日：2021-11-23
申请号：US16876267
申请日：2020-05-18
Applicant: CABLE TELEVISION LABORATORIES, INC
Inventor： Thomas H. Williams
Abstract: A digital transmission system includes a transmitter configured to transmit an orthogonal frequency division multiplexing (OFDM) signal along a signal path, a receiver for receiving the OFDM signal from the transmitter and extracting OFDM symbols from the received OFDM signal, and a diagnostic unit configured to (i) demodulate the received OFDM signal to create an ideal signal, (ii) compare the received OFDM signal with the ideal signal to calculate an error signal, (iii) cross-correlate the error signal with the ideal signal, and (iv) determine a level nonlinear distortion from one of the transmitter and the signal path based on the correlation of the error signal with the ideal signal.
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公开(公告)号：US11005593B2
公开(公告)日：2021-05-11
申请号：US16554336
申请日：2019-08-28
Applicant: CABLE TELEVISION LABORATORIES, INC
Inventor： Thomas H. Williams , Gregory Charles White
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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公开(公告)号：US20200280470A1
公开(公告)日：2020-09-03
申请号：US16876267
申请日：2020-05-18
Applicant: CABLE TELEVISION LABORATORIES, INC
Inventor： Thomas H. Williams
Abstract: A digital transmission system includes a transmitter configured to transmit an orthogonal frequency division multiplexing (OFDM) signal along a signal path, a receiver for receiving the OFDM signal from the transmitter and extracting OFDM symbols from the received OFDM signal, and a diagnostic unit configured to (i) demodulate the received OFDM signal to create an ideal signal, (ii) compare the received OFDM signal with the ideal signal to calculate an error signal, (iii) cross-correlate the error signal with the ideal signal, and (iv) determine a level nonlinear distortion from one of the transmitter and the signal path based on the correlation of the error signal with the ideal signal.
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公开(公告)号：US10680708B2
公开(公告)日：2020-06-09
申请号：US15481135
申请日：2017-04-06
Applicant: CABLE TELEVISION LABORATORIES, INC
Inventor： Thomas H. Williams , Ryan Richard Vail
IPC: H04B10/071 , H04B10/25 , H04B3/48 , H04B10/077
Abstract: A system for testing reflections within a data transmission signal includes a data transmission line configured to transmit the signal in a downstream direction, and a test probe configured to electrically contact a contact point on the transmission line and measure a magnitude of a frequency response of the signal therein. The system further includes a spectrum capturing device in operable contact with the test probe, and configured to collect and arrange data of frequency response magnitudes measured by the test probe. The data transmission line includes at least a first impedance mismatch corresponding to a first reflection point along the transmission line, and the spectrum capturing device is configured to determine a severity of the first reflection based on a comparison of a first voltage V1 with a second voltage V2, where V1 represents a DC term, and where V2 represents a reflected energy of a subsequent impulse.
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公开(公告)号：US10601501B2
公开(公告)日：2020-03-24
申请号：US16264345
申请日：2019-01-31
Applicant: CABLE TELEVISION LABORATORIES, INC
Inventor： Peter Paul Smyth , Lin Cheng , Jim O'Connor , Eric Winkelman , Thomas H. Williams , Belal Hamzeh , Steve Arendt
IPC: H04B7/185 , H04W16/14 , H04W16/20 , H04B17/391 , H04B7/0413 , H04W52/24 , H04B7/06
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.
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