Patents by Inventor Joong-Han Choi

Joong-Han Choi 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).

  • Repeating system and method for cancellation of feedback interference signal with pre-distortion function
    Patent number: 8344800
    Abstract: There is provided a repeating system for cancellation of a feedback interference signal, including: a PA (Power Amplifier) for power-amplifying an output signal; a feedback ICS (Interference Cancellation System) for canceling a feedback interference signal and detecting a residual error; a pre-distorter for compensating for an error of the PA by applying pre-distortion and compensating for the residual error by using information on the residual error detected by the feedback ICS to linearize the characteristic of the PA; and a control unit for controlling the feedback ICS and the pre-distorter.
    Type: Grant
    Filed: October 31, 2007
    Date of Patent: January 1, 2013
    Assignee: Airpoint
    Inventors: Sung-Jun Baik, Joong-Han Choi
  • REPEATING SYSTEM AND METHOD FOR CANCELLATION OF FEEDBACK INTERFERENCE SIGNAL WITH PRE-DISTORTION FUNCTION
    Publication number: 20100109771
    Abstract: There is provided a repeating system for cancellation of a feedback interference signal, including: a PA (Power Amplifier) for power-amplifying an output signal; a feedback ICS (Interference Cancellation System) for canceling a feedback interference signal and detecting a residual error; a pre-distorter for compensating for an error of the PA by applying pre-distortion and compensating for the residual error by using information on the residual error detected by the feedback ICS to linearize the characteristic of the PA; and a control unit for controlling the feedback ICS and the pre-distorter.
    Type: Application
    Filed: October 31, 2007
    Publication date: May 6, 2010
    Applicant: Hynix Semiconductor, Inc.
    Inventors: Sung-Jun Baik, Joong-Han Choi