Patents by Inventor Hyeon KWON

Hyeon KWON 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 producing/recovering OFDM/OFDMA signals
    Patent number: 7929511
    Abstract: The present invention discloses a method of producing a multi-layered OFDM symbol using a plurality of small IFFT blocks. The produced OFDM symbol is able to reduce complexity in performing IFFT or FFT while maintaining orthogonality of a related art OFDM symbol. In particular, by avoiding the related art scheme using the N-sized IFFT, the layered IFFT is executed in a manner of grouping N data symbols into P groups each of which includes Q data symbols (N=P?Q). In order to produce an OFDM signal equal to that of the related art N-sized IFFT, it is preferable that phases are aligned for the data symbols on which Q-sized IFFT has been performed.
    Type: Grant
    Filed: November 2, 2006
    Date of Patent: April 19, 2011
    Assignee: LG Electronics Inc.
    Inventors: Yeong Hyeon Kwon, Seung Hee Han, Min Seok Noh, Young Woo Yun
  • Method of transmitting synchronization signal in wireless communication system
    Patent number: 7924808
    Abstract: A method of transmitting a synchronization signal includes generating a sequence P(k) for a synchronization signal from a Zadoff-Chu (ZC) sequence having the odd numbered length N, the sequence P(k) having the even numbered length N?I, mapping the sequence P(k) to subcarriers so that the sequence P(k) is halved with respect to a DC subcarrier, and transmitting the a synchronization signal in the subcarriers. Time/frequency ambiguity caused by a synchronization error can be avoided, and sequence detection errors can be decreased.
    Type: Grant
    Filed: May 16, 2008
    Date of Patent: April 12, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • Method of generating code sequence and method of transmitting signal using the same
    Patent number: 7916759
    Abstract: A method of generating a code sequence and method of adding additional information using the same are disclosed, by which a code sequence usable for a channel for synchronization is generated and by which a synchronization channel is established using the generated sequence. The present invention, in which the additional information is added to a cell common sequence for time synchronization and frequency synchronization, includes the steps of generating the sequence repeated in time domain as many as a specific count, masking the sequence using a code corresponding to the additional information to be added, and transmitting a signal including the masked sequence to a receiving end.
    Type: Grant
    Filed: December 20, 2006
    Date of Patent: March 29, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Young Woo Yun, Hyun Hwa Park, Hyun Woo Lee, Dong Cheol Kim
  • Method of performing cell search in wireless communication system
    Patent number: 7916714
    Abstract: A method of performing cell search includes receiving a primary synchronization signal (PSS) comprising a primary synchronization code (PSC), and receiving a secondary synchronization signal (SSS) comprising a first secondary synchronization code (SSC) and a second SSC. The first SSC and the second SSC are respectively scrambled by using a first scrambling code and a second scrambling code, and the first scrambling code and the second scrambling code are associated with the PSC. Detection performance on synchronization signals can be improved, and cell search can be performed more reliably.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: March 29, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • METHOD FOR UPLINK TRANSMISSION OF CONTROL INFORMATION IN MOBILE COMMUNICATION SYSTEM
    Publication number: 20110069672
    Abstract: A method for uplink transmitting control information in a mobile communication system is disclosed. A method for uplink transmitting control information in a mobile communication system includes receiving control channel configuration information for indicating a first period about a time interval in which a control channel is repeatedly allocated and a second period about a time interval in which the control channel is repeatedly allocated in accordance with the first period, generating a control channel at a predetermined position in a time-frequency resource region for uplink transmission in consideration of the first period and the second period, and transmitting control information through the generated control channel.
    Type: Application
    Filed: May 29, 2009
    Publication date: March 24, 2011
    Inventors: Hyun Woo Lee, Min Seok Noh, Yeong Hyeon Kwon, Jin Sam Kwak, Dong Cheol Kim, Sung Ho Moon, Seung Hee Han
  • PREAMBLE TRANSMISSION METHOD IN A MULTIPLE ANTENNA SYSTEM
    Publication number: 20110070850
    Abstract: A method of transmitting a preamble for synchronization in a multiple-antenna system includes applying a masking sequence to a plurality of preambles, and transmitting each of the plurality of preambles, to which the masking sequence is applied, through each of a plurality of transmit antennas. In a multiple-antenna system, deterioration of reception performance for a preamble can be reduced.
    Type: Application
    Filed: May 20, 2009
    Publication date: March 24, 2011
    Inventors: Yeong Hyeon Kwon, Min Seok Noh, Jin Sam Kwak, Dong Cheol Kim, Sung Ho Moon, Seung Hee Han, Hyun Woo Lee
  • METHOD AND APPARATUS FOR TRANSMITTING DATA IN MULTIPLE CARRIER SYSTEM
    Publication number: 20110064042
    Abstract: A method and apparatus for transmitting data in a multiple carrier system is provided. The method includes receiving an uplink resource assignment comprising a carrier indicator through one of a plurality of downlink carriers, and transmitting uplink data in a resource assigned by the uplink resource assignment through the uplink carrier indicated by the carrier indicator.
    Type: Application
    Filed: July 31, 2009
    Publication date: March 17, 2011
    Inventors: So Yeon Kim, Jae Hoon Chung, Yeong Hyeon Kwon
  • Method of performing cell search in wireless communication system
    Patent number: 7907592
    Abstract: A method of performing cell search includes receiving a primary synchronization signal (PSS) comprising a primary synchronization code (PSC), acquiring an unique identity from the PSS, receiving a secondary synchronization signal (SSS) which is associated with a cell identity group, the SSS comprising two secondary synchronization codes (SSCs) and acquiring a cell identity which is defined by the unique identity within the cell identity group, wherein the two SSCs are respectively scrambled by using two different scrambling codes. Detection performance on synchronization signals can be improved, and cell search can be performed more reliably.
    Type: Grant
    Filed: July 3, 2008
    Date of Patent: March 15, 2011
    Assignee: LG Electronics Inc.
    Inventors: Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • METHOD OF TRANSMITTING CONTROL SIGNAL IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20110051621
    Abstract: A method of transmitting a control signal in a wireless communication system includes allocating a first sequence to spread a first control signal in a radio resource, allocating a second sequence to spread a second control signal in the radio resource, selecting one of the first control signal and the second control signal, generating a spread control signal by spreading the selected control signal, and transmitting the spread control signal in the radio resource, wherein the first sequence and the second sequence use different cyclic shifts of a base sequence.
    Type: Application
    Filed: November 8, 2010
    Publication date: March 3, 2011
    Inventors: Jin Sam KWAK, Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim
  • METHOD AND APPARATUS FOR ALLOCATING RANGING CHANNEL FOR SYNCHRONIZED MOBILE STATION IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20110051688
    Abstract: A method and apparatus for allocating a ranging channel for a synchronized mobile station in a wireless communication system is provided. A base station (BS) allocates the ranging channel for the synchronized mobile station in a first subframe and a first subband. An index of the first subframe and an index of the first subband are determined respectively based on an index of a second subframe and an index of a second subband in which a ranging channel of a non-synchronized mobile station is allocated.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 3, 2011
    Inventors: Hyun Woo Lee, Han Gyu CHO, Jin Sam KWAK, Yeong Hyeon KWON
  • METHOD OF TRANSMITTING UPLINK CONTROL SIGNALS IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20110051680
    Abstract: A method and device for transmitting uplink control signals in a wireless communication system, the method including: reserving a preassigned scheduling request (SR) physical uplink control channel (PUCCH) resource used for transmission of a SR; determining a frequency domain sequence and an orthogonal sequence based on the preassigned SR PUCCH resource; spreading an ACK/NACK for Hybrid Automatic Repeat Request (HARQ) with the frequency domain sequence and the orthogonal sequence to generate a mapped sequence; and transmitting the mapped sequence
    Type: Application
    Filed: November 8, 2010
    Publication date: March 3, 2011
    Inventors: Jin Sam KWAK, Hong Won Park, Seung Hee Han, Min Seok Noh, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jae Hoon Chung
  • COMMUNICATION METHOD FOR RADIO COMMUNICATION SYSTEM
    Publication number: 20110044215
    Abstract: A communication method of a user equipment using a time division duplex (TDD) frame in a wireless communication system is provided. The communication method include configuring a TDD frame comprising at least one downlink subframe and at least one uplink subframe, and transmitting a signal by using the TDD frame, wherein an uplink of the TDD frame starts on the basis of a guard period (GP) or an uplink pilot time slot (UpPTS) of a heterogeneous TDD frame.
    Type: Application
    Filed: April 14, 2009
    Publication date: February 24, 2011
    Inventors: Dong Cheol Kim, Min Seok Noh, Yeong Hyeon Kwon, Jin Sam Kwak, Sung Ho Moon, Seung Hee Han, Hyun Woo Lee
  • METHOD AND APPARATUS FOR GENERATING RANGING SIGNAL IN WIRELESS COMMUNICATION SYSTEM
    Publication number: 20110044312
    Abstract: A method and apparatus of generating a ranging signal in a wireless communication system is provided. A mobile station (MS) generates a ranging code in which a covering code has been applied to each of a plurality of orthogonal frequency division multiple access (OFDMA) symbols, and maps the ranging code to a plurality of subcarriers constituting each of the OFDMA symbols. The ranging signal is generated by performing OFDMA modulation on each of the OFDMA symbols.
    Type: Application
    Filed: August 19, 2010
    Publication date: February 24, 2011
    Inventors: Hyun Woo Lee, Han Gyu Cho, Jin Sam Kwak, Yeong Hyeon Kwon
  • Random access method and signalling method for the same
    Patent number: 7894396
    Abstract: A method for generating an iterative sequence and a signal transmission method using the same are disclosed. As the cell size or the distance between a user equipment (UE) and a Node-B increases, the CP is repeated at least one time while the iterative sequence is generated, the CP length and the ZCZ length are adjusted, so that the sequence timing point can be easily detected, orthogonality between sequences is maintained, and the sequences can be clearly distinguished from each other.
    Type: Grant
    Filed: September 21, 2007
    Date of Patent: February 22, 2011
    Assignee: LG Electronics Inc.
    Inventors: Min Seok Noh, Seung Hee Han, Yeong Hyeon Kwon, Hyun Hwa Park, Hyun Woo Lee, Dong Cheol Kim
  • METHOD FOR TRANSMITTING SUB-FRAME DESIGNATION INFORMATION TO A DOWNLINK IN A RADIO COMMUNICATION SYSTEM
    Publication number: 20110038285
    Abstract: A method of transmitting subframe designating information in downlink in a wireless communication system is disclosed. The present invention includes generating the subframe designating information for designating a subframe of a specific type in a radio frame and transmitting the generated subframe designating information to a user equipment, wherein the subframe designating information includes initial location information indicating an initial location of the subframe of the specific type on the radio frame and period information indicating a period for the subframe of the specific type to be repeated.
    Type: Application
    Filed: November 11, 2009
    Publication date: February 17, 2011
    Inventors: Yeong Hyeon Kwon, Min Seok Noh, Kyu Jin Park, Jae Hoon Chung, Seung Hee Han
  • Method for uplink transmission in OFDM(A) system
    Patent number: 7889633
    Abstract: A method for uplink transmission in an OFDMA system is provided. The subcarrier transmission method includes arranging 4 pilot REs at different positions of a frequency axis in a basic unit when the basic unit includes 4 subcarriers on the frequency axis and 6 OFDM(A) symbols in a time axis, arranging data REs at remaining positions of the basic unit, and transmitting the basic unit to a receiving end.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: February 15, 2011
    Assignee: LG Electronics Inc.
    Inventors: Min Seok Noh, Yeong Hyeon Kwon, Sung Ho Moon, Jin Sam Kwak, Dong Cheol Kim, Seung Hee Han, Hyun Woo Lee, Jin Soo Choi
  • METHOD AND APPARATUS FOR COMMUNICATION IN A TDD-BASED WIRELESS COMMUNICATION SYSTEM
    Publication number: 20110032853
    Abstract: Disclosed is a method and an apparatus for communication in a TDD (Time Division Duplex) based wireless communication system. The present invention involves setting a first frame comprising a plurality of consecutive downlink subframes and a plurality of consecutive uplink subframes. The start point for the first uplink subframe in the plurality of consecutive uplink subframes, is located at a switching point in a second frame used by another system.
    Type: Application
    Filed: April 14, 2009
    Publication date: February 10, 2011
    Inventors: Seong Ho Moon, Min Seok Noh, Yeong Hyeon Kwon, Jin Sam Kwak, Dong Cheol Kim, Seung Hee Han, Hyun Woo Lee
  • METHOD OF COMMUNICATING ACCORDING TO TIME DIVISION DUPLEX
    Publication number: 20110032855
    Abstract: The present invention provides a method of performing communication using a TDD (Time Division Duplex) mode, the method comprising receiving, from a second system, TDD frame configuration information of the second system, which comprises information on punctured symbol, the information on punctured symbol to be obtained based on TDD frame configuration information of a first system and operating based on the received TDD frame configuration information of the second system.
    Type: Application
    Filed: April 23, 2009
    Publication date: February 10, 2011
    Inventors: Dong Cheol Kim, Min Seok Noh, Yeong Hyeon Kwon, Jin Sam Kwak, Sung Ho Moon, Seung Hee Han, Hyun Woo Lee
  • Method for generating a reference signal sequence using grouping
    Patent number: 7881364
    Abstract: Method for generating reference signal sequence using grouping is explained. In this method, base sequences are grouped such that each group contains at least one base sequence of each length, so UE(s) can use various length sequences as a reference signal. And in this method, inter cell interference caused by using various length sequence as a reference signal sequence can be minimized by grouping sequences having the high cross correlation relation.
    Type: Grant
    Filed: July 30, 2009
    Date of Patent: February 1, 2011
    Assignee: LG Electronics Inc.
    Inventors: Min Seok Noh, Seung Hee Han, Yeong Hyeon Kwon, Hyun Woo Lee, Dong Cheol Kim, Jin Sam Kwak
  • METHOD FOR ALLOCATING RADIO RESOURCES IN FDD FRAME
    Publication number: 20110019597
    Abstract: A method of allocating a radio resource in a frequency division duplex (FDD) frame in which a downlink frame and an uplink frame are divided in a frequency domain in a wireless communication system includes allocating a downlink resource region for a first system in the downlink frame, and allocating an uplink resource region for the first system to the uplink frame such that the uplink resource region does not temporally overlap with the downlink resource region for the first system, wherein a resource region except for the downlink resource region for the first system is allocated to a downlink resource region for a second system in the downlink frame, and a resource region except for the uplink resource region for the first system is allocated to an uplink resource region for the second system in the uplink frame.
    Type: Application
    Filed: February 26, 2009
    Publication date: January 27, 2011
    Inventors: Sung Ho Moon, Minseok Noh, Yeong Hyeon Kwon, Jin Sam Kwak, Dong Cheol Kim, Seung Hee Han, Hyun Woo Lee