Patents by Inventor Kyu Chung

Kyu Chung 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 SIGNAL TRANSMISSION STARTING POINT OF TERMINAL IN WIRELESS NETWORK
    Publication number: 20120207146
    Abstract: Disclosed is a method for adjusting a transmission time point of at least one second terminal in a wireless network by a first terminal. In the method for adjusting a transmission time point of a terminal, a transmission time point of the second terminal is set, a first frame including information regarding the transmission time point is transmitted to the second terminal, a first response frame transmitted according to the transmission time point from the second terminal is received, and the transmission time point is adjusted according to an arrival time of the first response frame.
    Type: Application
    Filed: August 20, 2010
    Publication date: August 16, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Sung-Geun Jin, Kapseok Chang, Hyoung Jin Kwon, Woo Yong Lee, Hyun Kyu Chung
  • SYNCHRONIZATION CONTROL METHOD FOR DATA TRANSMISSION/RECEPTION, AND STATION FOR DATA TRANSMISSION/RECEPTION SYNCHRONIZATION
    Publication number: 20120207080
    Abstract: Disclosed is a technique related to a method for controlling synchronization by correcting data transmission time or frequency offset, and to a station.
    Type: Application
    Filed: August 25, 2010
    Publication date: August 16, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Sung Geun Jin, Hyun Kyu Chung, Woo yong Lee, Hyoung Jin Kwon
  • Channel estimation apparatus and method in mobile communication system having dispersed pilot
    Patent number: 8243836
    Abstract: Provided are a channel estimation method and apparatus in mobile communication system having dispersed pilot. The channel estimation apparatus includes an entire band channel estimation unit and an edge channel estimation unit. The entire band channel estimation unit performs channel estimation on an entire frequency band. The edge channel estimation unit performs channel estimation on an edge region. By separately performing the gating operation of the entire band channel estimation unit and the gating operation of the edge channel estimation unit, a channel frequency response is more accurately calculated even in an edge region.
    Type: Grant
    Filed: December 8, 2009
    Date of Patent: August 14, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Hye Kyung Jwa, Il Gyu Kim, Hyun Kyu Chung, Seung Chan Bang
  • Method for measuring variable bandwidth wireless channel and transmitter and receiver therefor
    Patent number: 8233845
    Abstract: Provided are a method for measuring a variable bandwidth wireless channel, and a transmitter and a receiver therefor. The transmitter, includes: a pre-processing unit for performing variable over-sampling and band-limited filtering on an original sequence for measuring the wireless channel according to a pre-determined digital-to-analog (D/A) operation speed and measurement bandwidth, and creating and storing a probing sequence whose frequency is up-converted into a fixed transmitting intermediate frequency; and a real-time processing unit for transmitting a probing signal that the stored probing sequence is converted according to the D/A operation speed to the wireless channel.
    Type: Grant
    Filed: January 5, 2012
    Date of Patent: July 31, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Sung-Jun Lee, Heon-Kook Kwon, Myung-Don Kim, Hyun-Kyu Chung, Kwang-Chun Lee
  • COMMUNICATION SYSTEM USING ULTRASONIC WAVES
    Publication number: 20120182836
    Abstract: Disclosed is a technology for performing a communication using an ultrasonic wave in an environment where an electromagnetic shielding is so severe that a wireless communication using an electromagnetic is difficult. In the environment where the electromagnetic shielding is severe, an ultrasonic terminal according to the present invention may transmit the ultrasonic wave using a solid structure as a medium, and an ultrasonic base station may receive the ultrasonic wave using the solid structure as the medium.
    Type: Application
    Filed: September 17, 2010
    Publication date: July 19, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Byung-Jae Kwak, Kwang Chun Lee, Hyun Kyu Chung, Nah-Oak Song
  • Monoclonal Antibodies Against ANGPTL4
    Publication number: 20120171217
    Abstract: Monoclonal antibodies that specifically bind to ANGPTL4 are provided. Monoclonal antibodies that neutralize at least one activity of ANGPTL4 are provided. Methods of treating a disorder of lipid metabolism using neutralizing monoclonal antibodies are provided.
    Type: Application
    Filed: December 8, 2011
    Publication date: July 5, 2012
    Applicant: LEXICON PHARMACEUTICALS, INC.
    Inventors: E-Chiang Lee, Gregory M. Landes, Kyu Chung, Ling Chen, Urvi Desai, David Reed Powell, Seokjoo Hong
  • APPARATUS AND METHOD FOR OBTAINING MAXIMUM VALUE AND MINIMUM VALUE IN PLURALITY OF DIGITAL INPUT SIGNALS
    Publication number: 20120169374
    Abstract: The present invention relates to a digital signal processing circuit, and more particularly, to a method and apparatus for generating a maximum value or a minimum value used for designing the digital signal processing circuit. An apparatus for obtaining a maximum value or a minimum value from N digital input signals may include N×W bit processing elements to receive an input of W bits of each of the N digital input signals, W OR operators to receive an input of N operation values output from bit processing elements, and to perform an OR operation, respectively, and W inverters to invert an output value for each of the W OR operators.
    Type: Application
    Filed: December 29, 2011
    Publication date: July 5, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung Woo CHOI, Woo Yong Lee, Hyun Kyu Chung
  • METHOD FOR SENDING AND RECEIVING DATA ON A COOPERATIVE COMMUNICATIONS SYSTEM AND A COOPERATIVE COMMUNICATIONS METHOD
    Publication number: 20120170619
    Abstract: A data transmission method of a source node in a cooperative communication system includes: performing a beamforming to a relay node; transmitting data to the relay node; performing a beamforming to a destination node; and transmitting data to the destination node.
    Type: Application
    Filed: July 8, 2010
    Publication date: July 5, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT
    Inventors: Kap-Seok Chang, Woo-Yong Lee, Kyeongpyo Kim, Hyoung-Jin Kwon, Hyun-Kyu Chung
  • Structure of Adaptive Multiple Antennas and Communication Device and Method Using Adaptive Multiple Antennae
    Publication number: 20120163217
    Abstract: The present invention relates to communication using multiple antennas, and more particularly, to an apparatus and method for adaptively adjusting, based on a channel environment, an interval and direction of multiple antennas each of a transmitter and a receiver. A communication method according to the present invention may include verifying information about a channel state based on a pilot signal transmitted for each antenna of a transmitter, adjusting intervals among antennas of a receiver based on the information about a channel state, calculating transmission capacity values according to the adjusted intervals among antennas, and setting an antenna to an antenna interval corresponding to a transmission capacity having a highest value among the transmission capacity values calculated.
    Type: Application
    Filed: December 22, 2011
    Publication date: June 28, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Kyeong Pyo KIM, Kap Seok Chang, Woo Yong Lee, Seung Joon Lee, Hyun Kyu Chung
  • MULTI-LINK WIRELESS CHANNEL SOUNDER AND MULTI-LINK WIRELESS CHANNEL MEASUREMENT METHOD THEREOF
    Publication number: 20120155516
    Abstract: A multi-link wireless channel sounder is provided. The multi-link wireless channel sounder includes a multi-input multi-output (MIMO) antenna unit, a transmitter (TX) signal processing unit configured to transmit via the MIMO antennas one or more TX wireless channel signals to be transmitted via a wireless channel, a receiver (RX) signal processing unit configured to receive and process one or more RX wireless channel signals that are received from multiple links via the MIMO antenna unit, and a control unit configured to receive an operation mode selection signal that indicates a TX mode or an RX mode from a user and to control the TX signal processing unit or the RX signal processing unit to operate selectively in accordance with the operation mode selection signal.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 21, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Myung-Don KIM, Jae-Joon PARK, Hyun-Kyu CHUNG
  • MOBILE PAYMENT METHOD AND SYSTEM USING BARCODE
    Publication number: 20120136739
    Abstract: A mobile payment method using a barcode is provided. In the method, a barcode is scanned using a mobile terminal of a member store to extract product information and/or payment-related information written to the barcode. Information of a payment methods selected by a customer is input to the mobile terminal and the input information is combined with the extracted product information and payment-related information to generate payment information. The payment information is transmitted to a payment server through or without passing through a relay server. The mobile terminal receives a payment confirmation code from the relay server or the payment server.
    Type: Application
    Filed: February 1, 2011
    Publication date: May 31, 2012
    Applicant: KCP CO., LTD
    Inventor: Seung-Kyu CHUNG
  • NETWORK EMPLOYING SPACE RECYCLING, AND A METHOD FOR MANAGING THE NETWORK
    Publication number: 20120113975
    Abstract: A method of operating a network coordinator for a spatial reuse scheme includes receiving a reservation request for a time period for a data communication of a target transmitter/receiver pair that uses a directional antenna, searching for a time period reserved in advance for another transmitter/receiver pair, from a Channel Time Allocation Period (CTAP) that is a contention-free access period for the data communication, and reserving a time period for the target transmitter/receiver pair in the CTAP, so that the time period reserved for the target transmitter/receiver pair overlaps the time period reserved in advance for the other transmitter/receiver pair.
    Type: Application
    Filed: July 16, 2010
    Publication date: May 10, 2012
    Inventors: Kyeongpyo Kim, Seung Eun Hong, Woo Yong Lee, Hyun Kyu Chung
  • Dual-band wideband local oscillation signal generator
    Patent number: 8174328
    Abstract: A dual-band wideband local oscillation signal generator includes an oscillation unit, a division unit, a poly phase filter (PPF), a switch unit, and a single side band (SSB) mixer. The oscillation unit is configured to generate a positive in-phase (IP) signal, a negative in-phase (IN) signal, a negative quadrature-phase (QN) signal, and a positive quadrature-phase (QP) signal. The division unit is configured to divide frequencies of the IP signal and the IN signal and generate an RF signal. The PPF is configured to receive the IP signal and the IN signals inputted to the division unit, and generate an LO IP signal, an LO IN signal, an LO QP signal, and an LO QN signal. The switch unit is configured to receive the generated LO signals and select a high band frequency signal or a low band frequency signal.
    Type: Grant
    Filed: August 20, 2010
    Date of Patent: May 8, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Bong-Hyuk Park, Kwang-Chun Lee, Hyun-Kyu Chung
  • Intercell interference mitigation apparatus and method
    Patent number: 8175071
    Abstract: There is provided an intercell interference mitigation apparatus for use in a terminal having a single reception antenna in a multi-cell downlink of an OFDMA system. The apparatus includes one or more parallel interference cancellers for canceling intercell interference by respreading soft decision values of cells other than a self cell; one or more LLR creation blocks for creating channel LLRs required for the soft decision for each of subcarriers, and producing channel soft outputs; one or more soft deciders for performing a soft decision of a self user symbol of the self cell in which interferences from other users are mitigated, and producing the soft decision values; and one or more channel estimation blocks for performing iterative channel estimation by respreading symbols of the soft decision values produced from the soft deciders.
    Type: Grant
    Filed: June 5, 2009
    Date of Patent: May 8, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Junyoung Nam, Seong Rag Kim, Hyun Kyu Chung
  • APPARATUS AND METHOD FOR TRANSMITTING/RECEIVING DATA IN COMMUNICATION SYSTEM
    Publication number: 20120106575
    Abstract: Disclosed is an apparatus and method for transmitting/receiving data using a low-density parity check (LDPC) coding scheme in a communication system. The method includes generating a multi-user data packet containing data to be transmitted to a plurality of users, encoding the multi-user data packet as a BCC and an LDPC code, and transmitting the encoded multi-user data packet to the plurality of users. In the method, the encoding of the multi-user data packet encodes MPDU subframes corresponding to each of the plurality of users in the multi-user data packet as the LDPC code, and calculates information on a length in LDPC encoding, corresponding to the encoding of the multi-user data packet as the LDPC code.
    Type: Application
    Filed: October 27, 2011
    Publication date: May 3, 2012
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Jong-Ee OH, Sok-Kyu Lee, Min-Ho Cheong, Jee-Yon Choi, Jae-Woo Park, Hyun-Kyu Chung
  • METHOD FOR MEASURING VARIABLE BANDWIDTH WIRELESS CHANNEL AND TRANSMITTER AND RECEIVER THEREFOR
    Publication number: 20120100820
    Abstract: Provided are a method for measuring a variable bandwidth wireless channel, and a transmitter and a receiver therefor. The transmitter, includes: a pre-processing unit for performing variable over-sampling and band-limited filtering on an original sequence for measuring the wireless channel according to a pre-determined digital-to-analog (D/A) operation speed and measurement bandwidth, and creating and storing a probing sequence whose frequency is up-converted into a fixed transmitting intermediate frequency; and a real-time processing unit for transmitting a probing signal that the stored probing sequence is converted according to the D/A operation speed to the wireless channel.
    Type: Application
    Filed: January 5, 2012
    Publication date: April 26, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Sung-Jun LEE, Heon-Kook KWON, Myung-Don KIM, Hyun-Kyu CHUNG, Kwang-Chun LEE
  • Antibodies immunoreactive with mutant hydroxypenylpyruvate dioxygenase
    Patent number: 8153132
    Abstract: Antibodies immunoreactive to mutant Pseudomonas HPPD are provided, and in an embodiment the mutant HPPD is one in which the wild-type HPPD is substituted at residue 336 with tryptophan for glycine. Also provided are hybridomas producing the antibodies, as well as methods of making and using the antibodies.
    Type: Grant
    Filed: October 30, 2009
    Date of Patent: April 10, 2012
    Assignee: MS Technologies, Inc.
    Inventors: Vaithilingam Sekar, Bruce Held, Kyu Chung, Paul F. Russell, Jr.
  • METHOD OF ALLOCATING RADIO RESOURCE AND TRANSMITTING DATA
    Publication number: 20120082142
    Abstract: Provided is a data transmission method. The data transmission method may limit a use authorization for a contention time period so that a portion of data transmission devices among a plurality of data transmission devices may transmit data during the contention time period.
    Type: Application
    Filed: October 5, 2011
    Publication date: April 5, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Yong Sun KIM, Seung Eun HONG, Woo Yong LEE, Hyun Kyu CHUNG
  • METHOD AND APPARATUS FOR CONTENTION-BASED CHANNEL ACCESS WITH DIRECTIONAL ANTENNA OVER WIDEBAND HIGH FREQUENCY WIRELESS SYSTEM
    Publication number: 20120082109
    Abstract: Provided are a method of performing contention based channel access by classifying a contention period into a beamformable contention period in which a beamforming is allowed and a non-beamformable contention period in which the beamforming is interrupted so as to resolve an issue regarding channel access occurring due to an introduction of a directional antenna for handling a path loss in a wideband wireless communication system according to an embodiment of the present invention, and a method for maximizing a spatial reuse gain by managing, for each direction, information about a transmission time of a message received from a dispersion device.
    Type: Application
    Filed: October 4, 2011
    Publication date: April 5, 2012
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seung Eun HONG, Yong Sun Kim, Woo Yong Lee, Hyun Kyu Chung
  • Apparatus and method of transmitting and receiving reception acknowledgment signal in mobile communication system
    Patent number: 8149769
    Abstract: Provided are apparatus and method of transmitting and receiving a reception acknowledgment signal in a mobile communication system. The apparatus and method of receiving the reception acknowledgment signal includes respectively calculating a probability that the received reception acknowledgment signal is a reception success signal and a probability that the reception acknowledgment signal is a reception failure signal, by using an estimated packet error rate predicted based on a pre-set required packet error rate and determining whether the reception acknowledgment signal is the reception success signal or the reception failure signal.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: April 3, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Heesoo Lee, Hyun-Kyu Chung