Patents by Inventor Jin-Sub Moon

Jin-Sub Moon 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).

  • Apparatus and method for compensating error for analog quadrature modulator (AQM)
    Patent number: 7130357
    Abstract: An apparatus and a method for compensating an error of an AQM measuring and compensating the error using returned I/Q digital signals calculate the error compensating signal is disclosed. The process includes detecting a DC offset signal by averaging sampling values of returned I/Q digital signals; detecting a gain compensating signal using a maximum value in a period of the I/Q digital signals of which the DC offset is compensated; and detecting a phase compensating value of the I/Q digital signals on the basis of sum of absolute values for differences between the gain compensated I-digital signals and Q-digital signals, and remove phase error, gain error and DC offset of the inputted digital signal sequentially to compensate the AQM error.
    Type: Grant
    Filed: December 24, 2002
    Date of Patent: October 31, 2006
    Assignee: LG-Nortel Co., Ltd.
    Inventors: Jin-Sub Moon, Woo-Sik Kim
  • Apparatus and method for compensating error for analog quadrature modulator (AQM)
    Publication number: 20030118126
    Abstract: An apparatus and a method for compensating an error of an AQM measuring and compensating the error using returned I/Q digital signals calculate the error compensating signal is disclosed. The process includes detecting a DC offset signal by averaging sampling values of returned I/Q digital signals; detecting a gain compensating signal using a maximum value in a period of the I/Q digital signals of which the DC offset is compensated; and detecting a phase compensating value of the I/Q digital signals on the basis of sum of absolute values for differences between the gain compensated I-digital signals and Q-digital signals, and remove phase error, gain error and DC offset of the inputted digital signal sequentially to compensate the AQM error.
    Type: Application
    Filed: December 24, 2002
    Publication date: June 26, 2003
    Applicant: LG Electronics Inc.
    Inventors: Jin-Sub Moon, Woo-Sik Kim