Patents by Inventor Philip F. Chang

Philip F. Chang 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).

  • Identification of a fault
    Patent number: 9479515
    Abstract: An apparatus, method, and system are provided for determining a location of an error source. Equalization coefficients may be retrieved and an average period of time between localized peak amplitudes may be determined. The average period of time may be multiplied by a velocity of propagation associated with a communication channel to determine an approximate location of the error source. The equalization coefficients may correspond to the inverse of the frequency response associated with the communication channel and may be updated over time using replacement or combination (e.g., convolution) techniques.
    Type: Grant
    Filed: March 1, 2013
    Date of Patent: October 25, 2016
    Assignee: Comcast Cable Communications, LLC
    Inventors: Lawrence D. Wolcott, Philip F. Chang
  • Identification of a Fault
    Publication number: 20130176860
    Abstract: An apparatus, method, and system are provided for determining a location of an error source. Equalization coefficients may be retrieved and an average period of time between localized peak amplitudes may be determined. The average period of time may be multiplied by a velocity of propagation associated with a communication channel to determine an approximate location of the error source. The equalization coefficients may correspond to the inverse of the frequency response associated with the communication channel and may be updated over time using replacement or combination (e.g., convolution) techniques.
    Type: Application
    Filed: March 1, 2013
    Publication date: July 11, 2013
    Applicant: Comcast Cable Communications, LLC
    Inventors: Lawrence D. Wolcott, Philip F. Chang