Patents by Inventor Ki-Won Song

Ki-Won Song 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).

  • Method and apparatus for adjusting threshold weight of frequency domain to improve anti-jamming performance and eliminate jamming in GPS system
    Patent number: 9651670
    Abstract: A method and apparatus for improving anti-jamming performance are provided. A threshold value level estimated in a GPS (global positioning system) receiver RF/IF stage, a threshold value weight, a median value of a median value of a 2˜8 MHz bandwidth is estimated as a threshold value with respect to a frequency component exceeding the estimated threshold value level, and an adjustable K-median threshold scheme is provided in a multi-jamming environment.
    Type: Grant
    Filed: November 4, 2010
    Date of Patent: May 16, 2017
    Assignee: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Jun O Kim, Jun Seoung Bae, Ki Won Song
  • METHOD AND APPARATUS FOR ADJUSTING THRESHOLD WEIGHT OF FREQUENCY DOMAIN TO IMPROVE ANTI-JAMMING PERFORMANCE AND ELIMINATE JAMMING IN GPS SYSTEM
    Publication number: 20120306695
    Abstract: A method and apparatus for improving anti-jamming performance are provided. A threshold value level estimated in a GPS (global positioning system) receiver RF/IF stage, a threshold value weight, a median value of a median value of a 2-8 MHz bandwidth is estimated as a threshold value with respect to a frequency component exceeding the estimated threshold value level, and an adjustable K-median threshold scheme is provided in a multi-jamming environment.
    Type: Application
    Filed: November 4, 2010
    Publication date: December 6, 2012
    Applicant: AGENCY FOR DEFENSE DEVELOPMENT
    Inventors: Jun O Kim, Jun Seong Bae, Ki Won Song
  • Protoberberine derivatives which inhibit activity of the mitogen-activated protein kinase
    Publication number: 20040029910
    Abstract: The present invention relates to protoberberine derivatives which inhibit the activity of mitogen-activated protein kinase. More specifically, the present invention is directed to protoberberine derivatives which inhibit the activity of Wis1 and Spc1 kinase in intracellular signal transduction cascade wherein mitogen-activated protein kinase (MAPK) is involved.
    Type: Application
    Filed: July 28, 2003
    Publication date: February 12, 2004
    Inventors: Ki-Won Song, Mi-Ri Jwa, Myoung-Jin Jang, Young-Ki Paik, Jun-Ho Kim