Patents by Inventor Julio Vergel

Julio Vergel 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).

  • Test instruments and methods for compensating IQ imbalance
    Patent number: 10924321
    Abstract: A test instrument may include a transmitter configured to transmit signals to a unit under test, a receiver configured to receive signals from the unit under test, and a controller configured to generate a transmitter compensation filter by (i) transmitting, with the transmitter, complex multi-sine signals over a first plurality of observed frequencies within a predetermined baseband frequency range, (ii) estimating a first plurality of frequency responses that compensate for in-phase and quadrature (IQ) imbalance at the first plurality of observed frequencies within the predetermined baseband frequency range, and (iii) determining, using the first plurality of frequency responses, a transmitter polynomial surface, and to compensate, using the transmitter compensation filter, at least one of the signals to be transmitted by the transmitter to reduce IQ imbalance in the transmitted signals, including using the transmitter polynomial surface to calculate a frequency response that reduces the IQ imbalance in the
    Type: Grant
    Filed: May 1, 2020
    Date of Patent: February 16, 2021
    Assignee: VIAVI SOLUTIONS INC.
    Inventors: Julio Vergel, Daniel Moore, Raja Balu
  • TEST INSTRUMENTS AND METHODS FOR COMPENSATING IQ IMBALANCE
    Publication number: 20200259698
    Abstract: A test instrument may include a transmitter configured to transmit signals to a unit under test, a receiver configured to receive signals from the unit under test, and a controller configured to generate a transmitter compensation filter by (i) transmitting, with the transmitter, complex multi-sine signals over a first plurality of observed frequencies within a predetermined baseband frequency range, (ii) estimating a first plurality of frequency responses that compensate for in-phase and quadrature (IQ) imbalance at the first plurality of observed frequencies within the predetermined baseband frequency range, and (iii) determining, using the first plurality of frequency responses, a transmitter polynomial surface, and to compensate, using the transmitter compensation filter, at least one of the signals to be transmitted by the transmitter to reduce IQ imbalance in the transmitted signals, including using the transmitter polynomial surface to calculate a frequency response that reduces the IQ imbalance in the
    Type: Application
    Filed: May 1, 2020
    Publication date: August 13, 2020
    Applicant: VIAVI SOLUTIONS INC.
    Inventors: Julio Vergel, Daniel Moore, Raja Balu
  • Test instruments and methods for compensating IQ imbalance
    Patent number: 10644927
    Abstract: A test instrument may include a transmitter configured to transmit signals to a unit under test, a receiver configured to receive signals from the unit under test, and a controller configured to generate a transmitter compensation filter by (i) transmitting, with the transmitter, complex multi-sine signals over a first plurality of observed frequencies within a predetermined baseband frequency range, (ii) estimating a first plurality of frequency responses that compensate for in-phase and quadrature (IQ) imbalance at the first plurality of observed frequencies within the predetermined baseband frequency range, and (iii) determining, using the first plurality of frequency responses, a transmitter polynomial surface, and to compensate, using the transmitter compensation filter, at least one of the signals to be transmitted by the transmitter to reduce IQ imbalance in the transmitted signals, including using the transmitter polynomial surface to calculate a frequency response that reduces the IQ imbalance in the
    Type: Grant
    Filed: June 29, 2019
    Date of Patent: May 5, 2020
    Assignee: VIAVI SOLUTIONS, INC.
    Inventors: Julio Vergel, Daniel Moore, Raja Balu
  • TEST INSTRUMENTS AND METHODS FOR COMPENSATING IQ IMBALANCE
    Publication number: 20200007378
    Abstract: A test instrument may include a transmitter configured to transmit signals to a unit under test, a receiver configured to receive signals from the unit under test, and a controller configured to generate a transmitter compensation filter by (i) transmitting, with the transmitter, complex multi-sine signals over a first plurality of observed frequencies within a predetermined baseband frequency range, (ii) estimating a first plurality of frequency responses that compensate for in-phase and quadrature (IQ) imbalance at the first plurality of observed frequencies within the predetermined baseband frequency range, and (iii) determining, using the first plurality of frequency responses, a transmitter polynomial surface, and to compensate, using the transmitter compensation filter, at least one of the signals to be transmitted by the transmitter to reduce IQ imbalance in the transmitted signals, including using the transmitter polynomial surface to calculate a frequency response that reduces the IQ imbalance in the
    Type: Application
    Filed: June 29, 2019
    Publication date: January 2, 2020
    Inventors: Julio Vergel, Daniel Moore, Raja Balu