Patents by Inventor Jong Kwan Yook

Jong Kwan Yook 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 feedback of channel state information in a distributed antenna system (DAS)— based wireless communication system
    Patent number: 8908548
    Abstract: Feedback methods and apparatuses are provided for efficiently feeding back downlink Channel State Information (CSI) using limited information in a DAS-based wireless communication system. A method includes determining, by a receiver, a candidate Antenna Port (AP) set from among a plurality of APs; selecting an active AP set from the candidate AP set; and transmitting the candidate AP set, the active AP set, and the downlink CSI of active APs included in the active AP set.
    Type: Grant
    Filed: December 7, 2011
    Date of Patent: December 9, 2014
    Assignees: Samsung Electronics Co., Ltd., Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Cheol Mun, Sung Tae Kim, Jong Kwan Yook, Youn Sun Kim, Jin Kyu Han
  • Method and apparatus for downlink transmission based on MIMO precoding in wireless communication system employing distributed antenna systems
    Patent number: 8724607
    Abstract: A transmission method and apparatus utilizing Multiple-Input and Multiple-Output (MIMO) precoding based on Distributed Antenna Systems (DASs) are provided. The transmission method includes determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) evenly placed in a service area; assigning a Multiple-Input and Multiple-Output (MIMO) mode to the UE and notifying the UE of the MIMO mode assignment; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports.
    Type: Grant
    Filed: February 13, 2012
    Date of Patent: May 13, 2014
    Assignees: Samsung Electronics Co., Ltd, Industry-Academic Cooperation Foundation, Yonsei University
    Inventors: Jin Kyu Han, Cheol Mun, Sung Tae Kim, Youn Sun Kim, Jong Kwan Yook
  • METHOD AND APPARATUS FOR DOWNLINK TRANSMISSION BASED ON MIMO PRECODING IN WIRELESS COMMUNICATION SYSTEM EMPLOYING DISTRIBUTED ANTENNA SYSTEMS
    Publication number: 20120207145
    Abstract: A transmission method and apparatus utilizing Multiple-Input and Multiple-Output (MIMO) precoding based on Distributed Antenna Systems (DASs) are provided. The transmission method includes determining active antenna ports, for a User Equipment (UE) having multiple receive antennas, from among a plurality of Distributed Antenna Ports (DAPs) evenly placed in a service area; assigning a Multiple-Input and Multiple-Output (MIMO) mode to the UE and notifying the UE of the MIMO mode assignment; determining a signal precoding vector on a basis of feedback information for the MIMO mode received from the UE; and precoding a signal using the signal precoding vector and transmitting the precoded signal through the active antenna ports.
    Type: Application
    Filed: February 13, 2012
    Publication date: August 16, 2012
    Applicants: Industry-Academic Cooperation Foundation, Yonsei University, Samsung Electronics Co., Ltd.
    Inventors: Jin Kyu HAN, Cheol MUN, Sung Tae KIM, Youn Sun KIM, Jong Kwan YOOK
  • METHOD AND APPARATUS FOR FEEDBACK OF CHANNEL STATE INFORMATION IN A DISTRIBUTED ANTENNA SYSTEM (DAS)- BASED WIRELESS COMMUNICATION SYSTEM
    Publication number: 20120140663
    Abstract: Feedback methods and apparatuses are provided for efficiently feeding back downlink Channel State Information (CSI) using limited information in a DAS-based wireless communication system.
    Type: Application
    Filed: December 7, 2011
    Publication date: June 7, 2012
    Applicant: Samsung Electronis Co., Ltd.
    Inventors: Cheol MUN, Sung Tae Kim, Jong Kwan Yook, Youn Sun Kim, Jin Kyu Han