Patents by Inventor Iick Ho Song

Iick Ho 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).

  • Near ML decoding method based on metric-first search and branch length threshold
    Patent number: 8018828
    Abstract: In this invention, we propose a near maximum likelihood (ML) method for the decoding of multiple input multiple output systems. By employing the metric-first search method, Schnorr-Euchner enumeration, and branch length thresholds in a single frame systematically, the proposed technique provides a higher efficiency than other conventional near ML decoding schemes. From simulation results, it is confirmed that the proposed method has lower computational complexity than other near ML decoders while maintaining the bit error rate (BER) very close to the ML performance. The proposed method in addition possesses the capability of allowing flexible tradeoffs between the computational complexity and BER performance.
    Type: Grant
    Filed: May 19, 2009
    Date of Patent: September 13, 2011
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Iick Ho Song, Tae Hun An, Jong Ho Oh
  • NEAR ML DECODING METHOD BASED ON METRIC-FIRST SEARCH AND BRANCH LENGTH THRESHOLD
    Publication number: 20100157785
    Abstract: In this invention, we propose a near maximum likelihood (ML) method for the decoding of multiple input multiple output systems. By employing the metric-first search method, Schnorr-Euchner enumeration, and branch length thresholds in a single frame systematically, the proposed technique provides a higher efficiency than other conventional near ML decoding schemes. From simulation results, it is confirmed that the proposed method has lower computational complexity than other near ML decoders while maintaining the bit error rate (BER) very close to the ML performance. The proposed method in addition possesses the capability of allowing flexible tradeoffs between the computational complexity and BER performance.
    Type: Application
    Filed: May 19, 2009
    Publication date: June 24, 2010
    Inventors: Iick Ho SONG, Tae Hun AN, Jong Ho OH
  • Multicarrier DS/CDMA system using a turbo code with nonuniform repetition coding
    Patent number: 7136370
    Abstract: The present invention relates to a multicarrier direct sequence code division multiple access (DS/CDMA) system using a turbo code with nonuniform repetition coding. In particular, it relates to a multicarrier DS/CDMA system using a turbo code with unequal diversity order in its code symbols instead of using a convolutional code.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: November 14, 2006
    Assignee: Korea Advanced Institute of Science and Technology
    Inventors: Iick Ho Song, Yun Hee Kim, Hyoung Moon Kwon
  • Multicarrier DS/CDMA system using a turbo code with nonuniform repetition coding
    Publication number: 20040202138
    Abstract: The present invention relates to a multicarrier direct sequence code division multiple access (DS/CDMA) system using a turbo code with nonuniform repetition coding. In particular, it relates to a multicarrier DS/CDMA system using a turbo code with unequal diversity order in its code symbols instead of using a convolutional code.
    Type: Application
    Filed: June 28, 2002
    Publication date: October 14, 2004
    Inventors: Iick Ho Song, Yun Hee Kim, Hyoung Moon Kwon