Patents by Inventor Thomas Holtzman Williams

Thomas Holtzman Williams has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200204416
    Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.
    Type: Application
    Filed: March 2, 2020
    Publication date: June 25, 2020
    Inventors: Douglas D. Jones, Luis Alberto Campos, Thomas Holtzman Williams
  • Publication number: 20200186240
    Abstract: Mitigation of satellite interference is contemplated. The mitigation may include processing satellite transmissions to remove interferences based on an amount of signal overlap, such as to facilitate mitigating interferences resulting from satellite spacing and/or ground antenna dish size.
    Type: Application
    Filed: February 3, 2020
    Publication date: June 11, 2020
    Inventors: Thomas Holtzman Williams, David Daniel Smith
  • Patent number: 10658989
    Abstract: An amplification subsystem for a communication system includes a downstream amplifier configured to transmit a downstream signal within a first frequency range, an upstream amplifier configured to transmit an upstream signal within a second frequency range, and a bidirectional amplifier configured to selectively transmit a mid-band signal in either of the upstream and downstream direction.
    Type: Grant
    Filed: October 24, 2019
    Date of Patent: May 19, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventors: Thomas Holtzman Williams, Belal Hamzeh
  • Patent number: 10644797
    Abstract: A communication network includes a first electrical cable, a home network translation device, and a first termination device. The home network translation device is communicatively coupled between an optical cable and the first electrical cable, and the home network translation device is configured to translate data between an optical protocol on the optical cable and a home networking protocol on the first electrical cable. The first termination device is communicatively coupled to the first electrical cable and is configured to translate data between the home networking protocol on the first electrical cable and an additional protocol on an additional communication medium communicatively coupled to the first termination device.
    Type: Grant
    Filed: January 18, 2019
    Date of Patent: May 5, 2020
    Assignee: CABLE TELEVISION LABORATORIES, INC.
    Inventor: Thomas Holtzman Williams
  • Patent number: 10581654
    Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.
    Type: Grant
    Filed: July 20, 2018
    Date of Patent: March 3, 2020
    Assignee: Cable Television Laboratories, Inc
    Inventors: Douglas D. Jones, Luis Alberto Campos, Thomas Holtzman Williams
  • Publication number: 20200059206
    Abstract: An amplification subsystem for a communication system includes a downstream amplifier configured to transmit a downstream signal within a first frequency range, an upstream amplifier configured to transmit an upstream signal within a second frequency range, and a bidirectional amplifier configured to selectively transmit a mid-band signal in either of the upstream and downstream direction.
    Type: Application
    Filed: October 24, 2019
    Publication date: February 20, 2020
    Inventors: Thomas Holtzman Williams, Belal Hamzeh
  • Patent number: 10554292
    Abstract: Mitigation of satellite interference is contemplated. The mitigation may include processing satellite transmissions to remove interferences based on an amount of signal overlap, such as to facilitate mitigating interferences resulting from satellite spacing and/or ground antenna dish size.
    Type: Grant
    Filed: October 9, 2018
    Date of Patent: February 4, 2020
    Assignee: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman Williams, David Daniel Smith
  • Publication number: 20190372818
    Abstract: A method of modulating a series of input digital symbols of a first modulation scheme is provided. The method is implemented by a transmitter and includes receiving a sequential series of samples of the digital symbols in a first domain of the first modulation scheme. The first domain is one of the time domain and the frequency domain. The method further includes determining a dual of the first modulation scheme. The dual has a second modulation scheme in a second domain that is different from the first domain the second domain is the other of the time domain and the frequency domain. The method further includes applying a 90 degree rotational operation to the second modulation scheme to generate a rotational modulation format, modulating the series of digital symbols with the generated rotational modulation format, and outputting the modulated series of digital symbols to a receiver.
    Type: Application
    Filed: January 18, 2018
    Publication date: December 5, 2019
    Applicant: Cable Television Laboratories, Inc.
    Inventors: Thomas Holtzman WILLIAMS, Lin CHENG
  • Publication number: 20190319718
    Abstract: A transmitter is configured to transmit data to a receiver over a communications network. The transmitter includes a memory for storing computer-executable instructions and a processor in operable communication with the memory. The processor is configured to (i) collect spectrum data of a spectral band over a first sampling interval, and (ii) store the collected spectrum data in the memory. The transmitter further includes a common path distortion (CPD) detection unit configured to (i) sample the collected spectrum data, over a second sampling interval less than the first sampling interval, for a plurality of sub-bands within the spectral band, (ii) analyze the spectral band and each sub-band for indications of common path distortion, and (iii) inject a test signal configured for detection at a headend of the communications network. The transmitter further includes a modem portion configured to operably communicate with the headend and the receiver.
    Type: Application
    Filed: April 15, 2019
    Publication date: October 17, 2019
    Inventors: Thomas Holtzman Williams, Luis Alberto Campos, Jason W. Rupe
  • Publication number: 20190281628
    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.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Thomas Holtzman Williams, Matthew D. Schmitt
  • Publication number: 20190222316
    Abstract: A communication network includes a first electrical cable, a home network translation device, and a first termination device. The home network translation device is communicatively coupled between an optical cable and the first electrical cable, and the home network translation device is configured to translate data between an optical protocol on the optical cable and a home networking protocol on the first electrical cable. The first termination device is communicatively coupled to the first electrical cable and is configured to translate data between the home networking protocol on the first electrical cable and an additional protocol on an additional communication medium communicatively coupled to the first termination device.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 18, 2019
    Inventor: Thomas Holtzman Williams
  • Publication number: 20190222007
    Abstract: Generating an assessment of the suitability of cables, ducts, tubes, pipes and/or other hollow-type of conduits to extraction of cores, conductors, insulation, etc. included therein while still buried in the ground or otherwise positioned out-of-sight so as to be unavailable for visual and/or physical inspection is contemplated. The assessment may be used to indicate a suitability of a cable buried in the ground of a hybrid fiber coaxial (HFC) cable plant to extraction of the type whereby a core of the cable may be extracted using hydraulics while still buried.
    Type: Application
    Filed: January 18, 2019
    Publication date: July 18, 2019
    Inventors: Luis Alberto Campos, Thomas Holtzman Williams, Zhensheng Jia
  • Publication number: 20190109633
    Abstract: Mitigation of satellite interference is contemplated. The mitigation may include processing satellite transmissions to remove interferences based on an amount of signal overlap, such as to facilitate mitigating interferences resulting from satellite spacing and/or ground antenna dish size.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 11, 2019
    Inventors: Thomas Holtzman Williams, David Daniel Smith
  • Publication number: 20190109608
    Abstract: Mitigating noise in a network is contemplated, such as but not necessarily limited to mitigating noise through a detection process whereby noise deviations resulting from selectively controlling smart taps, switches or other devices to block signaling in the network may be used to locate sources of noise.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 11, 2019
    Inventors: Joseph Padden, Thomas Holtzman Williams, Jonathan Ray Dennis, Daryl William Malas, Dan Schrimpsher, Douglas D. Jones
  • Publication number: 20190107572
    Abstract: A system for detecting a failure along a transmission line of a cable plant is provided. The system includes a mobile vehicle configured to travel along a pathway substantially proximate to the cable plant along a span of the transmission line, and a transmitter disposed with the mobile vehicle. The transmitter is configured to emit (i) a test signal capable of ingressing the transmission line at a location of the failure, and (ii) an information signal containing location and velocity data of the mobile vehicle. The test signal is configured to provide phase shift and Doppler frequency information to a receiver operably connected to the transmission line at a location upstream from the location of the failure.
    Type: Application
    Filed: October 9, 2018
    Publication date: April 11, 2019
    Inventor: Thomas Holtzman Williams
  • Publication number: 20190028310
    Abstract: A method for transmitting a digital frame by an optical network unit in a digital communications network includes steps of arranging received data into a series of symbols, installing a primary cyclic prefix immediately preceding the series of symbols in time, and inserting individual ones of a plurality of secondary cyclic prefixes between each adjacent pair of symbols in the series of symbols. A length of each secondary cyclic prefix corresponds to a first duration shorter than an amount of time needed to turn on a laser of the optical network unit. The method further includes a step of providing to the optical network unit the digital frame. The digital frame includes the primary cyclic prefix, the plurality of secondary cyclic prefixes, and the series of symbols. The method further includes a step of modulating the provided digital frame by a laser of the optical network unit.
    Type: Application
    Filed: July 20, 2018
    Publication date: January 24, 2019
    Inventors: Douglas D. Jones, Luis Alberto Campos, Thomas Holtzman Williams
  • Publication number: 20180159588
    Abstract: Facilitating echo cancellation within communication networks is contemplated, such as but not necessarily limited to facilitating echo cancellation within full-duplex (FDX) communication networks. The echo cancellation may optionally be performed with an echo canceller included as part of or otherwise associated with an FDX node used to facilitate interfacing signaling between a digital domain and an analog domain of a FDX or other communication network.
    Type: Application
    Filed: November 2, 2017
    Publication date: June 7, 2018
    Inventors: Thomas Holtzman Williams, Belal Hamzeh, Luis Alberto Campos
  • Patent number: 7788050
    Abstract: A system and method to range a distance to a source of CPD on a two-way cable system, comprises a fixed CW signal injected into a downstream signal path, a swept signal transmitted from a network analyzer, a mixer for generating an up-converted swept signal, and a source of CPD in the two-way cable system that mixes the fixed CW signal and the swept signal to create an upstream swept signal. The network analyzer receives the upstream swept signal and determines a complex frequency response created by the source of CPD. An impulse response is determined from the complex frequency response, and the distance to the source of CPD is determined from the impulse response.
    Type: Grant
    Filed: July 7, 2008
    Date of Patent: August 31, 2010
    Assignee: Arcom Digital, LLC
    Inventor: Thomas Holtzman Williams
  • Patent number: 7489137
    Abstract: A method to discover defective coaxial shielding in cable lines in a building by inducing a test current into the nearby alternating current (AC) power lines (also known as “mains” in the United Kingdom) and measuring a resulting induced test signal inside the coaxial cable lines. A test signal current driven onto the power lines from a wall socket will propagate back to the main electrical box in the building. The main electrical box is normally connected to a ground, such as water pipes or a ground rod driven into the earth. Some of the test signal will be transferred to the outside of the coaxial cable in the building by radiation, conduction or induction. If the coaxial cable has perfect shield integrity, none of the test signal will be induced into the center conductor of the coaxial cable. However, if the coaxial cable has poor shielding integrity or a shield break, some portion of the test current will be transferred into the inside of the cable, potentially causing interference with cable signals.
    Type: Grant
    Filed: April 13, 2005
    Date of Patent: February 10, 2009
    Inventor: Thomas Holtzman Williams
  • Publication number: 20080319689
    Abstract: A system and method to range a distance to a source of CPD on a two-way cable system, comprises a fixed CW signal injected into a downstream signal path, a swept signal transmitted from a network analyzer, a mixer for generating an up-converted swept signal, and a source of CPD in the two-way cable system that mixes the fixed CW signal and the swept signal to create an upstream swept signal. The network analyzer receives the upstream swept signal and determines a complex frequency response created by the source of CPD. An impulse response is determined from the complex frequency response, and the distance to the source of CPD is determined from the impulse response.
    Type: Application
    Filed: July 7, 2008
    Publication date: December 25, 2008
    Applicant: ARCOM DIGITAL, LLC
    Inventor: Thomas Holtzman Williams