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).

  • Publication number: 20100074191
    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: Application
    Filed: July 30, 2007
    Publication date: March 25, 2010
    Applicants: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE, SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyoseok Lee, Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Kapseok Chang, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100074448
    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: March 7, 2008
    Publication date: March 25, 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
  • Publication number: 20100074199
    Abstract: A method of discovering a neighbor cell, the method including: determining whether a first Primary Synchronization Channel (PSCH) of a first cell in which a terminal is included is identical to a second PSCH of a second cell, and whether timings of the first cell and the second cell are synchronous; estimating third channel information of the second cell based on second channel information of the first cell from first channel information, when the first PSCH is identical to the second PSCH and the timings of the first cell and the second cell are synchronous, the second channel information being estimated using a first Secondary Synchronization Channel (SSCH) of the first cell, and the first channel information being estimated using the first PSCH and the second PSCH; and detecting a second SSCH of the second cell, and detecting a cell identifier (ID) of the second cell using the second SSCH.
    Type: Application
    Filed: August 18, 2009
    Publication date: March 25, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Eun Jeong Shin, Hyeong Geun Park, Il Gyu Kim
  • Publication number: 20100067613
    Abstract: When a terminal generates an uplink signal in a communication system, the terminal hops a sequence for differentiating itself from another terminal with time. The terminal generates the uplink signal by multiplying a transmission symbol by a sequence of a transmission time corresponding to the transmission symbol.
    Type: Application
    Filed: August 31, 2007
    Publication date: March 18, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Hyeong-Geun Park, Ii-Gyu Kim, Young-Jo Ko, Kap-Seok Chang, Hyo-Seok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100061322
    Abstract: A piece of user equipment (UE), which has received more than two synchronization codes at the same time, has a problem in that the UE may not confirm the synchronization codes due to an increase in inter-signal interference. As a result, the UE may not acquire a primary scrambling code (PSC). A method of transmitting a forward synchronization signal in a wireless communication system includes: each base station existing in a wireless communication system generating a frame according to a predetermined unit of frame timing by using a same external clock signal; and allocating different offsets to frames of adjacent base stations by using the external clock signal so that forward link common channels included in the frames do not overlap each other, and transmitting the frames.
    Type: Application
    Filed: November 23, 2007
    Publication date: March 11, 2010
    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: 20100046432
    Abstract: A base station applies frequency switching transmission diversity and a preceding vector to a synchronization channel and applies a space-frequency block coding and a preceding 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: Application
    Filed: December 5, 2007
    Publication date: February 25, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap-Seok Chang, Hyeong-Geun Park, Ii-Gyu Kim, Young-Jo Ko, Hyo-Seok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100034301
    Abstract: A downlink frame generation device arrange a plurality of synchronization channel symbols and a plurality of broad-casting channel symbols in a common bandwidth of a system so that the symbols may neighbor each other on the time axis. The downlink frame generation device applies a precoding vector to the synchronization channel symbols and the broadcasting channel symbols to generate a plurality of downlink frames corresponding to a plurality of antennas. The precoding vector is variable by a sector for transmitting a plurality of downlink frames and a subframe in which a plurality of synchronization channel symbols are positioned. The precoding vector is independent of an index of a subcarrier.
    Type: Application
    Filed: November 16, 2007
    Publication date: February 11, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap-Seok Chang, Ii-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Hyo-Seok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20100020901
    Abstract: When a plurality of sectors transmit the same signal in a communication system, the same signal is transmitted after a weight is applied to the same signal.
    Type: Application
    Filed: July 5, 2007
    Publication date: January 28, 2010
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hyeong-Geun Park, Il-Gyu Kim, Young-Jo Ko, Kap-Seok Chang, Hyo-Seok Yi, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20090279513
    Abstract: A sector transmitter maps a synchronization channel and a broadcast channel to be on a time axis adjacent to each other, and applies the same bandwidth and the same transmission diversity to the synchronization channel and the broadcast channel. A mobile station estimates a plurality of channel statuses for a plurality of sectors from a synchronization channel signal, and acquires broadcast channel information from a broadcast channel signal using the plurality of estimated channel statuses. As a result, the mobile station can receive a broadcast channel with high reception quality while having low complexity.
    Type: Application
    Filed: June 21, 2007
    Publication date: November 12, 2009
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTIT
    Inventors: Kap-Seok Chang, Il-Gyu Kim, Hyeong-Geun Park, Young-Jo Ko, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20090257409
    Abstract: The present invention relates to a method for generating a downlink frame including generating a first short sequence and a second short sequence indicating cell group information, generating a first scrambling sequence determined by the first synchronization signal, generating a second scrambling sequence determined by the first short sequence, scrambling the first short sequence with the first scrambling sequence, scrambling the second short sequence with at least the second scrambling sequence, and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain.
    Type: Application
    Filed: June 19, 2009
    Publication date: October 15, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok CHANG, Il Gyu KIM, Hyeong Geun PARK, Young Jo KO, Hyo Seok YI, Moon Sik LEE, Young Hoon KIM, Seung Chan BANG
  • Publication number: 20090252109
    Abstract: The present invention relates to a method for demodulating a BCH by using an SCH in an OFDM system with transmit diversity, and a transmitting apparatus and a receiving apparatus using the same. For this purpose, the present invention provides a transmit diversity transmission method for a transmitting apparatus of a base station that generates an SCH symbol and a BCH symbol, maps the SCH symbol and the BCH symbol to an OFDM signal, converts the OFDM signal into a time domain signal, and transmits the OFDM signal trough a selected antenna among a plurality of antennas. In addition, the present invention provides a method for demodulating a BCH by using an SCH to a mobile station that receives an OFDM signal from the base station, filters an SCH and a BCH from the OFDM signal, converts the OFDM signal to a frequency domain signal, calculates a channel estimation value by using the SCH and the BCH, and coherently demodulates the BCH.
    Type: Application
    Filed: December 22, 2006
    Publication date: October 8, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Nam-Il Kim, Kap-Seok Chang, Moon-Sik Lee, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20090252335
    Abstract: The present invention relates to a method of generating a downlink frame.
    Type: Application
    Filed: June 19, 2009
    Publication date: October 8, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok CHANG, Il Gyu KIM, Hyeong Geun PARK, Young Jo KO, Hyo Seok YI, Chan Bok JEONG, Young Hoon KIM, Seung Chan BANG
  • Publication number: 20090252336
    Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by a short sequence group-a wireless communication system uses a plurality of short sequences and the plurality of short sequences are grouped into a plurality of short sequence group-to which the first short sequence is assigned; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain.
    Type: Application
    Filed: June 19, 2009
    Publication date: October 8, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok CHANG, Il Gyu KIM, Hyeong Geun PARK, Young Jo KO, Hyo Seok YI, Chan Bok JEONG, Young Hoon KIM, Seung Chan BANG
  • Publication number: 20090252332
    Abstract: The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a first short sequence and a third scrambling sequence determined by a second short sequence; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; scrambling the second short sequence with the first scrambling sequence; scrambling the first short sequence with at least the third scrambling sequence; and mapping one second synchronization signal including the first short sequence scrambled with the first scrambling sequence and the second short sequence scrambled with at least the second scrambling sequence and another second synchronization signal including the second short sequence scrambled wi
    Type: Application
    Filed: June 19, 2009
    Publication date: October 8, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok Chang, Il Gyu Kim, Hyeong Geun Park, Young Jo Ko, Hyo Seok Yi, Moon Sik Lee, Young Hoon Kim, Seung Chan Bang
  • Publication number: 20090252334
    Abstract: The present invention relates to a method of generating a downlink frame. The method of generating the downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence and a second scrambling sequence determined by the primary synchronization signal; generating a third scrambling sequence determined by the first short sequence; scrambling the first short sequence with the first scrambling sequence and scrambling the second short sequence with the second scrambling sequence and the third scrambling sequence; and mapping the secondary synchronization signal that includes the scrambled first short sequence and the scrambled second short sequence to a frequency domain.
    Type: Application
    Filed: June 19, 2009
    Publication date: October 8, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok CHANG, Il Gyu KIM, Hyeong Geun PARK, Young Jo KO, Hyo Seok YI, Chan Bok JEONG, Young Hoon KIM, Seung Chan BANG
  • Publication number: 20090252333
    Abstract: The present invention relates to a method for generating a downlink frame includes: generating a first short sequence and a second short sequence indicating cell group information; generating a first scrambling sequence determined by a first synchronization signal; generating a second scrambling sequence determined by a group to which the first short sequence belongs, the wireless communication system using a plurality of short sequences and the plurality of short sequence being divided into a plurality of groups; scrambling the first short sequence with the first scrambling sequence; scrambling the second short sequence with at least the second scrambling sequence; and mapping a second synchronization signal including the scrambled first short sequence and the scrambled second short sequence in the frequency domain.
    Type: Application
    Filed: June 19, 2009
    Publication date: October 8, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Kap Seok CHANG, Il Gyu KIM, Hyeong Geun PARK, Young Jo KO, Hyo Seok YI, Moon Sik LEE, Young Hoon KIM, Seung Chan BANG
  • Publication number: 20090232125
    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: Application
    Filed: July 25, 2007
    Publication date: September 17, 2009
    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: 20090219882
    Abstract: Provided are a cell search method, a forward link frame transmission method, an apparatus using the methods, and a forward link frame structure. The cell search apparatus includes a sync acquirer acquiring synchronization of sync channel symbols using a sync channel of a forward link, and a group detector detecting at least one hopping codeword element belonging to a hopping codeword of a target cell from a forward link signal containing sync channel symbols sequence-hopped using a hopping codeword corresponding to a code group to which a scrambling code of each cell belongs based on the acquired synchronization, and detecting a code group of the target cell based on the detected hopping codeword element, wherein the hopping codewords are orthogonal to a cyclic shift operation. Accordingly, a cell search time and the complexity of the cell search can be reduced.
    Type: Application
    Filed: November 10, 2006
    Publication date: September 3, 2009
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Il-Gyu Kim, Hyeong-Geun Park, Nam-Il Kim, Kap-Seok Chang, Young-Hoon Kim, Seung-Chan Bang
  • Publication number: 20090196279
    Abstract: Provided are a sync channel of a forward link, a common pilot channel structure, and an initial cell search method and an adjacent cell search method for handover in a cellular system using orthogonal frequency division multiplexing (OFDM). A cell search method in an OFDM cellular system in which a primary sync channel and a secondary sync channel are configured based on time division multiplexing (TDM) includes acquiring sync block synchronization and a primary sync channel sequence number using a primary sync channel symbol included in a frame received by a terminal, detecting a boundary of the frame and a scrambling code group using the sync block and a secondary sync channel symbol included in the frame received by the terminal, and acquiring a scrambling code using the primary sync channel sequence number and the scrambling code group, thereby reducing cell search time with low complexity.
    Type: Application
    Filed: April 17, 2009
    Publication date: August 6, 2009
    Applicants: Electronics and Telecommunications Research Institute, Samsung Electronics Co., Ltd.
    Inventors: Il-Gyu KIM, Hyeong-Geun PARK, Young-Jo KO, Kapseok CHANG, Hyoseok YI, Jun-Hwan LEE, Young-Hoon KIM, Seung-Chan BANG
  • Publication number: 20090175220
    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: Application
    Filed: April 19, 2007
    Publication date: July 9, 2009
    Inventors: Hyo-Seok Yi, Il-Gyu Kim, Young-Jo Ko, Kapseok Chang, Hyeong-Geun Park, Young-Hoon Kim, Seung-Chan Bang