Patents by Inventor Brian Krongold

Brian Krongold 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).

  • Blind equalization for polarization-switched QPSK optical communications
    Patent number: 8995834
    Abstract: An apparatus, e.g. an optical receiver, includes an optical front end and an equalizer. The front end is configured for receiving an optical signal bearing first and second symbols on respective first and second polarization channels. The equalizer is configured to 1) select a first cost function if the first symbol has greater energy than the second symbol, 2) select a second different cost function if the second symbol has a greater energy than the first symbol, and 3) based on the selected cost function, update coefficients of an adaptive filter configured to demultiplex and equalize the first and second polarization channels.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: March 31, 2015
    Assignee: Alcatel Lucent
    Inventors: Brian Krongold, Timo Pfau, Noriaki Kaneda
  • BLIND EQUALIZATION FOR POLARIZATION-SWITCHED QPSK OPTICAL COMMUNICATIONS
    Publication number: 20130163988
    Abstract: An apparatus, e.g. an optical receiver, includes an optical front end and an equalizer. The front end is configured for receiving an optical signal bearing first and second symbols on respective first and second polarization channels. The equalizer is configured to 1) select a first cost function if the first symbol has greater energy than the second symbol, 2) select a second different cost function if the second symbol has a greater energy than the first symbol, and 3) based on the selected cost function, update coefficients of an adaptive filter configured to demultiplex and equalize the first and second polarization channels.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 27, 2013
    Applicant: Alcatel-Lucent USA, Inc.
    Inventors: Brian Krongold, Timo Pfau, Noriaki Kaneda