Patents by Inventor Seung-Chang Bang

Seung-Chang Bang 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 FOR TRANSMITTING AND RECEIVING DATA TO PROVIDE HIGH-SPEED DATA COMMUNICATION AND METHOD THEREOF
    Publication number: 20190280731
    Abstract: A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal.
    Type: Application
    Filed: May 28, 2019
    Publication date: September 12, 2019
    Inventors: Seung-Chang BANG, Tae Joong KIM, Jae Heung KIM, Jung Im KIM, Jong Suk CHAE, Hyuck Jae LEE, Jae Ryong SHIM, Narm Hee LEE
  • Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system
    Patent number: 10305536
    Abstract: A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal.
    Type: Grant
    Filed: September 12, 2014
    Date of Patent: May 28, 2019
    Inventors: Seung-Chang Bang, Tae Joong Kim, Jae Heung Kim, Jung Im Kim, Jong Suk Chae, Hyuck Jae Lee, Jae Ryong Shim, Narm Hee Lee
  • Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communicating system
    Patent number: 8121173
    Abstract: A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal. The method is capable of improving a power efficiency of a mobile station by reducing a peak-to-average power ratio in a mobile communication system.
    Type: Grant
    Filed: October 27, 2008
    Date of Patent: February 21, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seung-Chang Bang, Tae-Joong Kim, Jae-Heung Kim, Jung-Im Kim, Jong-Suk Chae, Hyuck-Jae Lee, Jae-Ryong Shim, Narm-Hee Lee
  • Apparatus and method for modulating data message by employing orthogonal variable spreading factor (OVSF) codes in mobile communication system
    Patent number: 8090003
    Abstract: A method for converting source data to a channel-modulated signal having a plurality of pairs of in-phase (I) and quadrature-phase (Q) data in a mobile station, wherein the mobile station uses at least one channel, includes the steps of: a) encoding the source data to generate at least one data part and a control part; b) generating at least one spreading code to be allocated to the channel, wherein each spreading code is selected on the basis of a data rate of the data part and the control part and spreading codes are selected so that two consecutive pairs of the I and Q data are correspondent to two points located on same point or symmetrical with respect to a zero point on a phase domain; and c) spreading the control part and the data part by using the spreading code, to thereby generate the channel-modulated signal. The method is capable of improving a power efficiency of a mobile station by reducing a peak-to-average power ratio in a mobile communication system.
    Type: Grant
    Filed: July 23, 2009
    Date of Patent: January 3, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Seung-Chang Bang, Tae-Joong Kim, Jae-Heung Kim, Jung-Im Kim, Jong-Suk Chae, Hyuck-Jae Lee, Jae-Ryong Shim, Narm-Hee Lee