Patents by Inventor Joon Doo Kim

Joon Doo Kim 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).

  • Precoding method and device
    Patent number: 8625688
    Abstract: A method for a transmitting terminal in a multi-user multi-antenna environment to perform precoding includes: receiving feedback information from a plurality of receiving terminals; estimating a channel between the transmitting terminal and the plurality of receiving terminals by using the feedback information; and generating a plurality of transmission symbols by applying a first nonlinear precoding method and a second nonlinear precoding method to a plurality of symbols and the estimated channel to be transmitted to the plurality of receiving terminals. The first nonlinear precoding method is used to eliminate interference between subchannels of the same receiving terminal, and the second nonlinear precoding method is used to eliminate interference between the receiving terminals.
    Type: Grant
    Filed: November 24, 2009
    Date of Patent: January 7, 2014
    Assignees: Samsung Electronics Co., Ltd., Electronics and Telecommunications Research Institute
    Inventors: Choongil Yeh, Young Seog Song, Min Sik Seo, Dong Seung Kwon, Joon-doo Kim, Chungyong Lee, Jiwon Kang
  • Transmitting/receiving method for multi-user multiple-input multiple-output system
    Patent number: 8509336
    Abstract: Disclosed is a transmitting/receiving method in a multi-user multiple-input multiple-output (MU-MIMO) channel. The transmitting method includes: performing QR decomposition on a Hermitian transpose matrix of a channel matrix to obtain a first matrix and a second matrix as a triangular matrix; obtaining a preprocessing matrix by using the first matrix; and forming an effective channel based on the preprocessing matrix by a block triangulation technique.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: August 13, 2013
    Assignees: Samsung Electronics Co., Ltd., Electronics & Telecommunications Research Institute
    Inventors: Choong il Yeh, In-Kyeong Choi, Young Seog Song, Seung Joon Lee, Byung-Jae Kwak, Ji Hyung Kim, Dong Seung Kwon, Joon Doo Kim, Ji Won Kang, Chung Yong Lee
  • PRECODING METHOD AND DEVICE
    Publication number: 20110243204
    Abstract: A method for a transmitting terminal in a multi-user multi-antenna environment to perform precoding includes: receiving feedback information from a plurality of receiving terminals; estimating a channel between the transmitting terminal and the plurality of receiving terminals by using the feedback information; and generating a plurality of transmission symbols by applying a first nonlinear precoding method and a second nonlinear precoding method to a plurality of symbols and the estimated channel to be transmitted to the plurality of receiving terminals. The first nonlinear precoding method is used to eliminate interference between subchannels of the same receiving terminal, and the second nonlinear precoding method is used to eliminate interference between the receiving terminals.
    Type: Application
    Filed: November 24, 2009
    Publication date: October 6, 2011
    Inventors: Choongil Yeh, Young Seog Song, Min Sik Seo, Dong Seung Kwon, Joon-doo Kim, Chungyong Lee, Jiwon Kang
  • TRANSMITTING/RECEIVING METHOD FOR MULTI-USER MULTIPLE-INPUT MULTIPLE-OUTPUT SYSTEM
    Publication number: 20100310001
    Abstract: Disclosed is a transmitting/receiving method in a multi-user multiple-input multiple-output (MU-MIMO) channel. The transmitting method includes: performing QR decomposition on a Hermitian transpose matrix of a channel matrix to obtain a first matrix and a second matrix as a triangular matrix; obtaining a preprocessing matrix by using the first matrix; and forming an effective channel based on the preprocessing matrix by a block triangulation technique.
    Type: Application
    Filed: June 24, 2008
    Publication date: December 9, 2010
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Electronics and Telecommunications Research Institute
    Inventors: Choong il Yeh, In-Kyeong Choi, Young Seog Song, Seung Joon Lee, Byung-Jae Kwak, Ji Hyung Kim, Dong Seung Kwon, Joon Doo Kim, Ji Won Kang, Chung Yong Lee