Patents Assigned to TRDA, Inc.
  • CALIBRATION APPARATUS AND METHOD FOR QUADRATURE MODULATION SYSTEM
    Publication number: 20080285682
    Abstract: A calibration apparatus for a quadrature modulation system with a quadrature modulation compensator and a logarithmic envelop detector, wherein a parameter update of the quadrature modulation compensator is derived by utilizing a transformed offset value and a transformed gain value of the logarithmic envelop detector as intermediate parameters, and the transformed offset and the transformed gain parameters are used in a training sequence of the quadrature modulation compensator.
    Type: Application
    Filed: April 11, 2008
    Publication date: November 20, 2008
    Applicant: TRDA, Inc.
    Inventors: Lichung Chu, Kiyoyuki Ihara, Kenji Kamitani, Fumitaka Iizuka