Patents by Inventor Ryan L. Bunch

Ryan L. Bunch 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).

  • Transceiver IQ calibration system and associated method
    Patent number: 9025645
    Abstract: Local oscillator (LO) in-phase/quadrature (IQ) imbalance correction data are generated for one or both of the transmitter and receiver of a radio-frequency (RF) communication device. An RF transmitter output signal is generated by the transmitter from a known test signal and transmitted to the receiver, where a baseband receiver signal is produced. A signal characteristic of the receiver baseband signal is measured in the presence of phase shifts introduced in the transmitter output signal. Joint LO IQ imbalance figures of merit are computed from the signal characteristic measurements, each characterizing signal processing artifacts in the receiver baseband signal caused by joint signal processing in the transmitter and the receiver under influence of transmitter LO IQ imbalance and receiver LO IQ imbalance.
    Type: Grant
    Filed: April 24, 2013
    Date of Patent: May 5, 2015
    Assignee: MStar Semiconductor, Inc.
    Inventors: Wael Al-Qaq, Ryan L. Bunch, Dennis Mahoney, Paul Brey
  • TRANSCEIVER IQ CALIBRATION SYSTEM AND ASSOCIATED METHOD
    Publication number: 20140321516
    Abstract: Local oscillator (LO) in-phase/quadrature (IQ) imbalance correction data are generated for one or both of the transmitter and receiver of a radio-frequency (RF) communication device. An RF transmitter output signal is generated by the transmitter from a known test signal and transmitted to the receiver, where a baseband receiver signal is produced. A signal characteristic of the receiver baseband signal is measured in the presence of phase shifts introduced in the transmitter output signal. Joint LO IQ imbalance figures of merit are computed from the signal characteristic measurements, each characterizing signal processing artifacts in the receiver baseband signal caused by joint signal processing in the transmitter and the receiver under influence of transmitter LO IQ imbalance and receiver LO IQ imbalance.
    Type: Application
    Filed: April 24, 2013
    Publication date: October 30, 2014
    Applicant: MStar Semiconductor, Inc.
    Inventors: Wael Al-Qaq, Ryan L. Bunch, Dennis Mahoney, Paul Brey