Patents by Inventor Dong-kyu Kim

Dong-kyu Kim 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: 7327797
    Abstract: An OFDM receiving device for adjusting a beam formation azimuth through a plurality of antennas, a communication device using the same, and a method thereof.
    Type: Grant
    Filed: November 1, 2001
    Date of Patent: February 5, 2008
    Inventors: Bong-Wee Yu, Hyun-Cheol Park, Dong-Kyu Kim, Jun-Hyun Park, Ju-Yon Kim, Hak-Lim Ko
  • Publication number: 20080021132
    Abstract: Provided is a low friction type anti-fouling paint. The anti-fouling paint includes prepolymer fluid formed of 10% to 30% NCO mythylene diisocyanate of 100 wt %; and resin fluid formed of polyoxylpropylenediamine of about 42 wt % to 48 wt % for adjusting an elongation and a tensile strength of a paint film, polyethertriamine of about 8 wt % to 10 wt % having a molecular weight of 5,000 for adjusting a curing time, polydiphenyltriamine of about 15 wt % to 20 wt % for adjusting a curing physical property and increasing the elongation, a modified silicone fluid of about 8 wt % to 12 wt % for increasing a slip and an anti fouling property, a filler of about 5 wt % to 9 wt % for increasing an abrasion resistance, an adhesion promoter of about 1 wt % to 2 wt %, and a pigment of about 1 wt % to 2 wt %.
    Type: Application
    Filed: December 18, 2006
    Publication date: January 24, 2008
    Inventor: Dong Kyu Kim
  • Publication number: 20070251259
    Abstract: An ice-making device of a refrigerator includes: an ice-making unit installed within a refrigerator and making ice cubes; a dispenser provided on a refrigerator door to allow the ice cubes to be taken out of the refrigerator; an ice duct guiding the ice cubes made in the ice-making unit to the dispenser; and an introduction preventing unit preventing an object from being introduced into the ice-making unit through the ice duct. A method for controlling an ice-making device of a refrigerator includes: inputting an ice cube extract signal; making ice cubes by driving an ice-making unit provided within the refrigerator and breaking the ice cubes according to the inputted signal; sensing an internal temperature of an ice duct that guides the ice cubes made in the ice-making unit to a dispenser provided on a refrigerator door; and stopping an operation of the ice-making unit when the sensed temperature is higher.
    Type: Application
    Filed: April 26, 2007
    Publication date: November 1, 2007
    Inventors: Dong-Kyu Kim, Jin-Hyun Kim
  • Publication number: 20070129391
    Abstract: Provided is a composition for preventing or treating damages of the mucosa in the gastrointestinal tracts, comprising revaprazan or a salt thereof and a pharmaceutically acceptable carrier. Revaprazan or its salt has an excellent preventive or treatment effect for gastrointestinal mucosal damage by potentiating a defensive factor in the gastrointestinal mucosa, simultaneously with acting as an acid pump antagonist.
    Type: Application
    Filed: November 27, 2006
    Publication date: June 7, 2007
    Applicant: Yuhan Corporation
    Inventors: Ki-Baik Hahm, Dong-Kyu Kim, Mi-Sun Kwak, Sang-Aun Joo, Byoung-Seok Moon, Geun-Seog Song
  • Publication number: 20070041459
    Abstract: A Peak-to-Average Power Ratio (PAPR) reduction apparatus and method in an OFDM communication system are provided. In the PAPR reduction method, magnitude and phase components are extracted from transmission sample data. Peaks having magnitude components exceeding a threshold are detected by comparing the extracted magnitude components with the threshold. The highest of the peaks is detected and compared with the threshold. If the highest peak is greater than the threshold, the highest peak is updated.
    Type: Application
    Filed: August 10, 2006
    Publication date: February 22, 2007
    Applicant: SAMSUNG ELECTRONICS CO., LTD.
    Inventors: Hae-Dong Yeon, Jae-Yong Lee, Yun-Sang Park, Bong-Gee Song, Dong-Kyu Kim, Dong-Joon Shin
  • Publication number: 20070018927
    Abstract: A liquid crystal display (LCD) which can provide uniform vertical and horizontal visibility while improving lateral visibility is provided. The LCD includes a first insulating substrate, first and second gate lines which are formed on the first insulating substrate, and a data line which is insulated from the first and second gate lines and intersects the first and second gate lines. The LCD also includes first and second thin film transistors (TFTs) which are formed in each pixel and are connected to the first and second gate lines, respectively, and to the data line, first sub-pixel electrodes which are connected to the first TFT, and a second sub-pixel electrode which is separated from the first sub-pixel electrodes by predetermined gaps and is connected to the second TFT.
    Type: Application
    Filed: May 31, 2006
    Publication date: January 25, 2007
    Inventor: Dong-kyu Kim
  • Patent number: 7158476
    Abstract: A received signal is converted into a digital signal through an A/D converter and then converted into the polar coordinate system. A synchronizer removes a frequency offset from the digital signal, the digital signal is again converted into an orthogonal coordinate system and a fast fourier transform is performed with a FFT. The digital signal is again converted into the polar coordinate system. An equalizer and a phase compensator compensate respectively a channel distortion and a phase error to the digital signal. Thus, the OFDM receiver using polar coordinate system and method thereof of the present invention can reduce the number of adders and multipliers required in a frequency synchronization, a compensation for channel influence, and a removal of remaining phase error by processing the signal in the polar coordinate system, thereby simplifying the calculation process and the receiver.
    Type: Grant
    Filed: July 29, 2002
    Date of Patent: January 2, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-kyu Kim
  • Publication number: 20060182015
    Abstract: An Orthogonal Frequency Division Multiplexing (OFDM) signal receiving apparatus and method of estimating a common phase error (CPE) using data subcarriers (and pilot subcarriers) instead of only pilot subcarriers. In the OFDM signal receiver, a channel measurement unit estimates a channel from a fast-Fourier-transformed signal to generate information about good subcarrier indexes as channel state information (CSI). A Common Phase Error (CPE) estimation unit estimates good pilot subcarriers and good data subcarriers from an equalized signal output from an equalizer (EQ) based on the channel state information (CSI), calculates the first and second common phase errors from the estimated pilot and data subcarriers respectively, and combines the first and second common phase errors to generate a final common phase error.
    Type: Application
    Filed: January 25, 2006
    Publication date: August 17, 2006
    Inventor: Dong-Kyu Kim
  • Patent number: 7088672
    Abstract: A device for receiving an orthogonal frequency division multiplexing (OFDM) signal includes: an ADC for converting an analog OFDM signal into a digital signal; a control device for controlling a sampling clock of the digital signal from the ADC, and detecting a symbol start point; an FFT unit for performing the fast Fourier transform on the symbol from the control device; an operation device for calculating a common phase noise and a sampling clock offset amount of the symbol from the FFT unit, outputting the compensated symbol to the channel estimation unit, and providing the sampling clock offset amount to the control device; a channel estimation unit for estimating a channel property according to the value from the operation device; and an equalizing device for compensating for distortion of the reception signal according to the estimated channel property value from the channel estimation unit.
    Type: Grant
    Filed: December 6, 2001
    Date of Patent: August 8, 2006
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Dong-Kyu Kim
  • Publication number: 20060146947
    Abstract: A circuit for detecting a guard interval in an orthogonal frequency division multiplication (OFDM) communication system, using two successive autocorrelation calculations for a received sample train. The circuit determines a guard interval by calculating the maximum correlation value first autocorrelation calculation step (delaying an OFDM signal by the length of valid data N, the useful data duration); and a second autocorrelation calculation step (delaying the OFDM signal by a guard interval detection period (N+G1), the sum of the valid data length (N) and the minimum guard interval (GI)). Performing two autocorrelation calculation steps provides improved detection of the guard interval, being free from noises and distortions and producing the maximum correlation value and position more distinctly.
    Type: Application
    Filed: December 14, 2005
    Publication date: July 6, 2006
    Inventor: Dong-Kyu Kim
  • Publication number: 20060135077
    Abstract: Disclosed is a multi-transceiver system adapted to estimate a frequency offset on basis of a test signal and a reference signal. Transceivers in the multi-transceiver system are adapted to transmit signals compensated with the frequency offsets.
    Type: Application
    Filed: October 11, 2005
    Publication date: June 22, 2006
    Inventor: Dong-Kyu Kim
  • Patent number: 7012881
    Abstract: A timing and frequency offset estimation method for OFDM use an analytic tone in calculating timing offset estimation and a frequency offset estimation. An analytic tone includes a signal that contains only one subcarrier and has characteristics of a uniform magnitude and a uniform phase rotation. The estimation algorithm with an analytic tone is based correlation function. By changing the interval between two samples in correlation, the maximum estimation range for the frequency offset can be extended to ±N/2 subcarrier spacing, where N is the number of total subcarriers. Thus, the frequency synchronization scheme for OFDM systems has a wider range and a more simple complexity than traditional ones requiring separate fine and coarse synchronization.
    Type: Grant
    Filed: December 29, 2000
    Date of Patent: March 14, 2006
    Assignee: Samsung Electronic Co., Ltd.
    Inventor: Dong Kyu Kim
  • Publication number: 20060002359
    Abstract: Provided are an orthogonal frequency division multiple assess (OFDMA) system and a method for controlling frequency offsets of subscribers in uplink communication. The OFDMA system solves a problem that the system performance is deteriorated in uplink communications because subscriber stations have different carrier frequency offsets. Each subscriber station compensates for a frequency offset thereof in response to a frequency offset control signal provided by a base station and then transmits an uplink frame to the base station. The base station compensates for an average frequency offset using the uplink frame, which has a small frequency offset shift because each subscriber station compensates for the frequency offset thereof previously, and thus the frequency offset of each subscriber station can be correctly compensated to prevent inter-carrier interference.
    Type: Application
    Filed: June 8, 2005
    Publication date: January 5, 2006
    Inventors: Dong-Kyu Kim, Yong-Je Lim
  • Publication number: 20050232217
    Abstract: An apparatus for detecting a guard interval length (type) of a transmission symbol among the structure of an orthogonal frequency division multiplexing (OFDM) system receiver, to ensure proper operation of a symbol start detector and a fast Fourier transform (FFT) window position controller, is provided.
    Type: Application
    Filed: June 14, 2005
    Publication date: October 20, 2005
    Inventors: Sang-hyun Do, Dong-kyu Kim, Hyung-jin Choi
  • Patent number: D538270
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: March 13, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Kyu Kim, Yang Jic Lee, Beom Ku Han, Chang Hwan Hwang
  • Patent number: D538271
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: March 13, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Kyu Kim, Yang Jic Lee, Beom Ku Han, Chang Hwan Hwang
  • Patent number: D538792
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: March 20, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Kyu Kim, Yang Jic Lee, Beom Ku Han, Chang Hwan Hwang
  • Patent number: D539787
    Type: Grant
    Filed: January 9, 2006
    Date of Patent: April 3, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Kyu Kim, Yang Jic Lee, Beom Ku Han, Chang Hwan Hwang
  • Patent number: D553077
    Type: Grant
    Filed: November 7, 2006
    Date of Patent: October 16, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong Kyu Kim, Beom Ku Han, Chang Soo Lee
  • Patent number: D558712
    Type: Grant
    Filed: July 27, 2006
    Date of Patent: January 1, 2008
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Dong-Kyu Kim, Beom-Ku Han, Chang-Soo Lee