Patents by Inventor Hyeong Geun Park

Hyeong Geun Park 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).

  • Patent number: 8259697
    Abstract: A transmission method performed by a mobile station for random access channel (RACH) burst transmission diversity gain is provided. According to the method, a variety of combinations of a time switching transmit diversity (TSTD) technique, a frequency hopping technique, and a power ramping technique that are robust against fading channel environments are applied to transmission of an RACH burst, thereby increasing the probability of detecting an RACH signature of a base station. Also, by using the transmission parameters (subband frequencies, transmission antennas, power, etc.) which are used for successful transmission of an RACH burst, for transmission of a successive user packet data, reliable transmission of the successive user packet data can be performed.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: September 4, 2012
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd
    Inventors: Hyo-Seok Yi, Il-Gyu Kim, Young-Jo Ko, Kapseok Chang, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8249632
    Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes generating a first sequence and a second sequence for identifying cell groups; generating a first scrambling sequence and a second scrambling sequence that are one-to-two mapped to the sequence number of the primary synchronization signal; scrambling the first sequence with the first scrambling sequence and scrambling the second sequence with the second scrambling sequence; and generating a secondary synchronization signal including the scrambled first sequence and second sequence and mapping the secondary synchronization signal to a frequency domain.
    Type: Grant
    Filed: June 24, 2008
    Date of Patent: August 21, 2012
    Assignees: Samsung Electronics Co., Ltd, Electronics and Telecommunications Research Institute
    Inventors: Il Gyu Kim, Young Jo Ko, Hyeong Geun Park, Kap Seok Chang, Hyo Seok Yi, Young-Hoon Kim, Seung Chan Bang, Kyoung Joon Lee
  • Patent number: 8248911
    Abstract: Provided are a cell search method, a forward link frame transmission method, an apparatus using the methods, and a forward link frame structure in an Orthogonal Frequency Division Multiplexing cellular system, wherein the time it takes to perform a cell search and the complexity of the cell search can be reduced. The cell search apparatus includes a sync acquirer which receives a signal according to a forward link frame comprising a plurality of sync channel symbols each having different intervals between the adjacent sync channel symbols and achieves synchronization of the sync channel symbols using a sync channel of the received signal, and a boundary detector which detects a frame boundary using an interval pattern between the sync channel symbols, based on the achieved synchronization.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: August 21, 2012
    Assignees: Electronics and Telecommunications Research Institute, KT Corporation, SK Telecom. Co., Ltd.
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Nam-Il Kim, Kap-Seok Chang, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8194594
    Abstract: A base station applies frequency switching transmission diversity and a precoding vector to a synchronization channel and applies a space-frequency block coding and a precoding vector to a broadcast channel. The base station controls the synchronization channel and the broadcast channel to be positioned adjacent each other and then generates and transmits a downlink frame. The base station includes partial information on the number of antennas in the synchronization channel, and other information thereon in the broadcast channel.
    Type: Grant
    Filed: December 5, 2007
    Date of Patent: June 5, 2012
    Assignee: Electronics and Telecommunications Research Institute
    Inventors: Kap-Seok Chang, Hyeong-Geun Park, Il-Gyu Kim, Young-Jo Ko, Hyo-Seok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8165097
    Abstract: A transmission method performed by a mobile station for random access channel (RACH) burst transmission diversity gain is provided. According to the method, by combining and using switching diversity by beam forming, frequency hopping, and power ramping, the probability that when the speed of a mobile station is low, the mobile station falls into a deep fading environment is lowered, thereby increasing the probability of detecting an RACH signature of the base station. Also, by using the transmission parameters (subbands, precoding matrixes, power, etc.) which are used for successful transmission of an RACH burst, for transmission of a successive user packet data, reliable transmission of the successive user packet data can be performed.
    Type: Grant
    Filed: April 19, 2007
    Date of Patent: April 24, 2012
    Assignee: Electronics and Telecommincations Research Institute
    Inventors: Hyo-Seok Yi, Il-Gyu Kim, Young-Jo Ko, Kapseok Chang, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8130717
    Abstract: Provided are a random access method of a mobile station and a mobile communication device performing the same. The mobile station can obtain a diversity gain without a Random Access Channel (RACH) burst collision by hopping according to a cell group in a frequency domain and transmitting a random access when random access resources are used between neighboring cells and detect an RACH even with low transmission power by applying switching diversity together with the frequency hopping.
    Type: Grant
    Filed: July 30, 2007
    Date of Patent: March 6, 2012
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
    Inventors: Hyoseok Lee, Il-Gyu Kim, Hyeong-Geun Park, Kapseok Chang, Young-Jo Ko, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 8050358
    Abstract: The present invention relates to a transmit diversity method of a mobile communication system and a base station transmitting apparatus using the same. A first code and a second code that is diversity-encoded from the first code are generated, and transmit symbols are spread with the first code and the second code. A first transmit symbol spread with the first code and a second transmit symbol spread with the second code are mapped to symbols in frequency and time domains in a frame and transmitted through antennas. Therefore, various diversity techniques can be provided to the mobile communication system, and the diversity technique is not restricted to symbols transmitted to the same mobile station and can also be applied to a 1-bit channel.
    Type: Grant
    Filed: August 24, 2006
    Date of Patent: November 1, 2011
    Assignees: Electronics and Telecommunications Research Institute, SK Telecom., Co., Ltd., KT Corporation
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang
  • Patent number: 7969964
    Abstract: In a cellular system in which OFDM is used, a forward link synchronization channel, a common pilot channel structure, an initial cell searching method of a mobile station, and an adjacent cell searching method for handover are required. A method of transmitting a forward synchronization signal in a wireless communication system according to the present invention includes generating a frame comprised of a plurality of sync blocks; and transmitting the frame through a forward link, wherein the frame comprises primary synchronization channel sequences which provide timing information of the sync blocks and a plurality of secondary synchronization channel sequences which provide timing information of the frame, wherein a cell identifier is specified by a combination of the primary synchronization channel sequence and a hopping code word specified by the plurality of the secondary synchronization channel sequences. Therefore, the cell searching time can be efficiently reduced in an OFDM system.
    Type: Grant
    Filed: July 25, 2007
    Date of Patent: June 28, 2011
    Assignee: Electronics & Telecommunications Research Institute
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20110150064
    Abstract: Provided is a method of estimating a symbol. The method may include deriving phase components of input data, applying a second order differentiation to the phase components to obtain a second order differential phase vector, and estimating symbols corresponding to the input data using the second order differential phase vector.
    Type: Application
    Filed: December 17, 2010
    Publication date: June 23, 2011
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Chung Sup KIM, Soo Ho SOHN, Ki Cheol TAE, Hyeong Geun PARK, Yong-Seok CHOI
  • Publication number: 20110149947
    Abstract: A method of and an apparatus therefor searching a cell in a mobile station of a communication system in which a plurality of cells are grouped into a plurality of cell groups, and each cell group includes at least two cells. The method includes detecting a primary synchronization signal and a secondary synchronization signal from a received signal, and identifying a cell based on a combination of the primary synchronization signal and the secondary synchronization signal. The secondary synchronization signal is related to the cell group to which the mobile station belongs and the primary synchronization signal is related to the cell to which the mobile station belongs within the cell group.
    Type: Application
    Filed: February 28, 2011
    Publication date: June 23, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Il-Gyu KIM, Hyeong-Geun PARK, Young-Jo KO, Kapseok CHANG, Hyoseok YI, Young-Hoon KIM, Seung-Chan BANG
  • Publication number: 20110085495
    Abstract: Provided is method of forming a signal in a wireless communication system in which a plurality of terminals commonly use a resource in the time domain and the frequency domain. The method includes multiplying a signal to be transmitted by a frequency domain orthogonal code symbol corresponding to a first cyclic shift index in a first slot to be transmitted to a base station, wherein the multiplying is performed by a first terminal and a second terminal; and multiplying information to be transmitted by a frequency domain orthogonal code symbol corresponding to a second cyclic index that is different from the first cyclic index of the first slot to be transmitted to the base station, in a second slot, wherein the multiplying is performed by the first terminal and the second terminal.
    Type: Application
    Filed: August 8, 2008
    Publication date: April 14, 2011
    Inventors: Young-Jo Ko, Hyeong-Geun Park, Il-Gyu Kim, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20110044256
    Abstract: An apparatus for generating a downlink signal and a cell search apparatus are disclosed. An apparatus for generating a downlink signal generates a downlink signal by one unique cell identification code group and a plurality of frame synchronization identification sequences, generates a downlink signal by a plurality of unique cell identification code groups and a plurality of frame synchronization identification sequences, or generates a downlink signal by a plurality of unique cell identification code groups and one frame synchronization identification sequence. A cell search apparatus obtains frame synchronization and identifies cells through a frame synchronization identification sequence and a unique cell identification code group.
    Type: Application
    Filed: May 30, 2007
    Publication date: February 24, 2011
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap-Seok Chang, Il-Gyu Kim, Nam-Il Kim, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20110009138
    Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes generating a first sequence and a second sequence for identifying cell groups; generating a first scrambling sequence and a second scrambling sequence that are one-to-two mapped to the sequence number of the primary synchronization signal; scrambling the first sequence with the first scrambling sequence and scrambling the second sequence with the second scrambling sequence; and generating a secondary synchronization signal including the scrambled first sequence and second sequence and mapping the secondary synchronization signal to a frequency domain.
    Type: Application
    Filed: June 24, 2008
    Publication date: January 13, 2011
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Il Gyu Kim, Young Jo Ko, Hyeong Geun Park, Kap Seok Chang, Hyo Seok Yi, Young-Hoon Kim, Seung Chan Bang, Kyoung Joon Lee
  • Patent number: 7817566
    Abstract: Provided is a wired Multiple-Input Multiple-Output (MIMO) link tester. The wired link tester, includes: a simulating unit for constructing a wired link corresponding to a wireless link for a multiple-input multiple-output system and simulating wireless-link characteristics using each variable element located on the wired link; and a control means for prestoring a predetermined value of the variable element depending on the state change time and the number of the state changes and controlling the variable element according to the predetermined value of the variable element.
    Type: Grant
    Filed: December 6, 2007
    Date of Patent: October 19, 2010
    Assignees: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
    Inventors: Sung-Jun Lee, Jae-Ho Jung, Hyeong-Geun Park, Seong-Min Kim, Kwang-Chun Lee
  • Patent number: 7790206
    Abstract: The present invention relates to a composition for promoting the growth of animals, comprising extracts of Artemisia capillaris thunberg, Acanthopanax and garlic, as well as a feed composition comprising the same. The composition for promoting the growth of animals shows the excellent effect of promoting the secretion of growth hormone. Particularly, when the feed composition comprising the animal growth-promoting composition is administered to livestock animals, it will show the excellent effects of body weight gain, meat quality improvement and milk production increase in the livestock animals.
    Type: Grant
    Filed: June 13, 2005
    Date of Patent: September 7, 2010
    Assignee: RNL Life Science Ltd.
    Inventors: Jeong Chan Ra, Hyeong Geun Park, Kyung Sun Kang
  • Publication number: 20100208709
    Abstract: Provided is a method of efficiently transmitting an acknowledgement/negative acknowledgement (ACK/NACK) bit supporting hybrid automatic repeat request (HARQ) in a wireless communication system supporting multi-user multi-input and multi-output (MIMO). The method transmits the same downlink code and in-phase/quadrature (I/Q) multiplexed ACK/NACK bit to two mobile stations using the same uplink resource block. Accordingly, the method can efficiently transmit the ACK/NACK bit for multi-user MIMO and efficiently use downlink radio resources.
    Type: Application
    Filed: June 13, 2008
    Publication date: August 19, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100182976
    Abstract: When a plurality of terminals share the same resources in a wireless communication system, and when control information such as acknowledgement/negative acknowledgement (ACK/NAK) information or scheduling information is transmitted, a method of efficiently performing code division multiplexing (CDM) is required to distinguish the plurality of terminals. In particular, it is necessary to develop a method by which a code sequence of CDM can be selected and used according to each cell condition. Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly share frequency and time resources. The method includes the operations of receiving condition information in a cell; selecting one of a plurality of time domain orthogonal sequences having different lengths, according to the condition information; and allocating the selected time domain orthogonal sequence to a control signal symbol block.
    Type: Application
    Filed: June 23, 2008
    Publication date: July 22, 2010
    Applicants: Electronics and Telecommunications Research Institute, KT Corporation
    Inventors: Young-Jo Ko, Hyeong-Geun Park, Il-Gyu Kim, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100172330
    Abstract: Provided is a method of forming a signal in a wireless communication system in which a plurality of terminals commonly use time and frequency resources for efficient code hopping. The method includes allocating the same frequency-axis sequence and different time-axis sequences to a plurality of terminals by using a resource index according to a first slot in the first slot; and allocating different frequency-axis sequences and different time-axis sequences to the plurality of terminals by using a resource index according to a second slot in the second slot.
    Type: Application
    Filed: June 16, 2008
    Publication date: July 8, 2010
    Inventors: Young-Jo Ko, Hyeong-Geun Park, Il-Gyu Kim, Kapseok Chang, Hyoseok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100104001
    Abstract: Provided are a receiver and a receiving method for a scalable bandwidth in a mobile station of an Orthogonal Frequency Division Multiplexing (OFDM) system. The receiving method includes the steps of: (a) filtering a received RF signal; (b) oscillating a frequency according to a center frequency control signal to output a local oscillation frequency; (c) down-converting the filtered RF signal by using the local oscillation frequency; (d) scalable-filtering the down-converted signal while adjusting a bandwidth according to a bandwidth control signal; (e) controlling gain of the scalable-filtered signal; (f) converting the gain-controlled analog signal into a digital signal by using a sampling frequency matching with a corresponding bandwidth according to an ADC control signal; and (g) demodulating the converted digital signal, outputting the center frequency control signal, the bandwidth control signal, and the ADC control signal according to control information received from an upper layer.
    Type: Application
    Filed: October 10, 2007
    Publication date: April 29, 2010
    Applicants: SAMSUNG ELECTRONICS CO., LTD., Electronics and Telecommunications Research Institute
    Inventors: Moon-Sik Lee, Nam-Il Kim, Hyeong-Geun Park, Il-Gyu Kim, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100086129
    Abstract: A signal transmitting method according to an exemplary embodiment of the present invention includes channel-coding broadcasting channel information by using a first scrambling code in a first frame within a broadcasting channel information updating period including a plurality of frames, and channel-coding the broadcasting channel information by using a second scrambling code in a second frame within the broadcasting channel information updating period. The second scrambling code is different from the first scrambling code.
    Type: Application
    Filed: December 10, 2009
    Publication date: April 8, 2010
    Applicants: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
    Inventors: Hyeong-Geun PARK, Il-Gyu KIM, Kap-Seok CHANG, Young-Jo KO, Hyo-Seok YI, Young-Hoon KIM, Seung-Chan BANG