Patents by Inventor Seong-yun Cho

Seong-yun Cho 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: 20100136999
    Abstract: An apparatus for determining a position of a terminal calculates distances between a terminal and a plurality of base stations by using time information acquired by a reference station among the plurality of base stations through unidirectional communication between the terminal and the base stations and between the base stations, and determines a position of the terminal by using the calculated distances.
    Type: Application
    Filed: September 1, 2009
    Publication date: June 3, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Byung Doo KIM, Youngsu CHO, Seong Yun CHO, Sung Jo YUN, Sun-Joong KIM, Wan Sik CHOI, Jong-Hyun PARK
  • Publication number: 20100137001
    Abstract: The present invention relates to a terminal and a terminal location providing method. The terminal for selectively accessing a plurality of base stations supporting different communication systems includes a first network interface card that is turned on when the terminal is turned on, a second network interface card that is turned on or activated when receiving the terminal's location information request, a power controller for controlling power of the first and second network interface cards, and a processor for receiving the terminal's location information request and controlling the power of the first and second network interface cards through the power controller.
    Type: Application
    Filed: October 20, 2009
    Publication date: June 3, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Youngsu CHO, Byung Doo KIM, Seong Yun CHO, Sung Jo YUN, Sun-Joong KIM, Wan Sik CHOI, Jong-Hyun PARK
  • Publication number: 20100103026
    Abstract: A radar tracking apparatus and method are provided. The radar tracking apparatus includes an ?-? tracking filter, wherein the ?-? tracking filter includes: a tracking index unit calculating a tracking index for obtaining ? and ? filter gains of an ?-? tracking filter, based on changes in the measurement error covariance of a radar-measured value that occur when the measured value of target is converted from a polar coordinate system to a rectangular coordinate system; and a filter gain update unit calculating the variations of ? and ? filter gains, based on the partial differential coefficient of the changing rate of the ? and ? filter gains with respect to the changing rate of the tracking index and the variations of the tracking index, and updating the ? and ? filter gains.
    Type: Application
    Filed: June 15, 2007
    Publication date: April 29, 2010
    Inventors: Byung-Doo Kim, Seong-Yun Cho, Young-Su Cho, Wan-Sik Choi, Jong-Hyun Park
  • Publication number: 20100106745
    Abstract: Provided is a fingerprint database generating method and device for wireless location. Signal strength is estimated by using access points on a numerical map, position coordinates of grid points, and a radio wave attenuation model so as to generate a fingerprint database. A simulation error is computed based on actual survey data measured in the real space, and the estimated signal strength is corrected by using the computed simulation error to thus generate a fingerprint database.
    Type: Application
    Filed: August 4, 2009
    Publication date: April 29, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Seong Yun CHO, Byung Doo Kim, Youngsu Cho, Sung Jo Yun, Sun-Joong Kim, Wan Sik Choi, Jong-Hyun Park
  • Publication number: 20100049439
    Abstract: Provided are an integrated navigation apparatus and a method for providing navigation information using the same. The integrated navigation apparatus includes a first filter, a second filter, a mode probability updating unit, a first navigation information calculating unit, a second navigation information calculating unit, a fusion unit and a navigation information fusion unit.
    Type: Application
    Filed: March 23, 2007
    Publication date: February 25, 2010
    Applicant: Electronics and Telecommunications Research Institute
    Inventors: Seong-Yun Cho, Byung-Doo Kim, Young-Su Cho, Wan-Sik Choi, Jong-Hyun Park
  • Publication number: 20100039929
    Abstract: Provided is an indoor wireless positioning system and method including: a signal receiving unit receiving first signals from wireless communication access points and measuring strengths of the received first signals and a position estimating unit estimating a current position by comparing the strengths of the first signals measured by the signal receiving unit with a table recording strengths of second signals predicted by a simulation for indoor space the system is currently positioned. Accordingly, it is possible to rapidly and accurately create a fingerprint database and calculate position information on the terminal in the terminal or the server on the basis of the database information.
    Type: Application
    Filed: October 29, 2007
    Publication date: February 18, 2010
    Applicant: Electronics and Telecommunications Research Instit
    Inventors: Seong-Yun Cho, Byung-Doo Kim, Young-Su Cho, Wan-Sik Choi, Jong-Hyun Park
  • Publication number: 20100040115
    Abstract: A method and apparatus for acquiring a refined carrier frequency by optimizing search areas are provided. The apparatus for acquiring a refined carrier frequency by optimizing search areas includes: a refined signal generation unit using a coarse carrier frequency and a coarse code phase extracted from a digitized signal and obtaining a refined carrier frequency approximated to the carrier frequency of an original signal from which the digitized signal is obtained by conversion; and a refined carrier frequency searching unit setting and providing a search area in which the refined signal acquisition unit can obtain the refined carrier frequency based on the coarse carrier frequency. According to the method and apparatus, as a result of the searching method reducing a search time, acquisition of a refined carrier frequency as well as fast acquisition of a signal is enabled, thereby allowing a precise initial value to be provided to a signal tracking unit.
    Type: Application
    Filed: November 14, 2007
    Publication date: February 18, 2010
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Young-Su Cho, Byung-Doo Kim, Seong-Yun Cho, Wan-Sik Choi, Jong-Hyun Park
  • Publication number: 20090291693
    Abstract: Provided is a method for estimating a position of a mobile terminal in a wireless network. In the method according to the present invention, difference values between squared signal arrival times of base stations are used to estimate the position of the mobile terminal.
    Type: Application
    Filed: April 6, 2009
    Publication date: November 26, 2009
    Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE
    Inventors: Byung Doo KIM, Seong Yun CHO, Young Su CHO, Wan Sik CHOI
  • Publication number: 20080319708
    Abstract: Provided is an apparatus for estimating virtual axis geomagnetic data using a 2-axis geomagnetic sensor and an inclinometer, including a geomagnetic data normalizing unit for normalizing 2-axis geomagnetic data measured by the 2-axis geomagnetic sensor, a tilt angle calculator for calculating a tilt angle of the 2-axis geomagnetic sensor by using tilt information measured by the inclinometer, and a virtual axis geomagnetic data estimator for determining a magnitude of virtual geomagnetic data with respect to a virtual axis by using the normalized 2-axis geomagnetic data, and determining a sign of the virtual geomagnetic data based on the normalized 2-axis geomagnetic data, the calculated tilt angle and a dip angle to thereby estimate the virtual geomagnetic data.
    Type: Application
    Filed: December 21, 2005
    Publication date: December 25, 2008
    Applicant: Electronics and Telecommunications Research Institute
    Inventor: Seong-Yun Cho
  • Patent number: 7155837
    Abstract: A geomagnetic sensor includes a geomagnetic detection module configured to output an electrical signal having a magnitude corresponding to a magnetic field; a memory configured to store an azimuth measured in a horizontal plane; an accelerometer module configured to measure a tilt at present, and to compute a tilt angle therefrom; and a controller configured to calculate a dip angle by using the electrical signal outputted from the geomagnetic detection module, the tilt angle, and the horizontal azimuth. A method for detecting a dip angle by a geomagnetic sensor includes outputting an electrical signal having a magnitude corresponding to an external geomagnetic field; detecting an azimuth in a horizontal plane and storing the detected azimuth; measuring a tilt at present and computing a tilt angle thereof; and calculating a dip angle by using the electrical signal, the tilt angle, and the azimuth measured in the horizontal plane.
    Type: Grant
    Filed: February 7, 2005
    Date of Patent: January 2, 2007
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Woo-jong Cho, Seong-yun Cho, Chan-gook Park, Sang-on Choi, Woo-jong Lee
  • Publication number: 20050183274
    Abstract: A geomagnetic sensor for detecting a dip angle includes a geomagnetic detection module for outputting an electric signal having a magnitude corresponding to a magnetic field; a memory for storing an azimuth measured in a horizontal plane; an accelerometer module for measuring a tilt at present, and computing a tilt angle therefrom; and a controller for calculating a dip angle by using the electric signal outputted from the geomagnetic detection module, the tilt angle, and the horizontal azimuth. Therefore, a user can more easily and conveniently calculate the dip angle at the present position.
    Type: Application
    Filed: February 7, 2005
    Publication date: August 25, 2005
    Inventors: Woo-jong Cho, Seong-yun Cho, Chan-gook Park, Sang-on Choi, Woo-jong Lee
  • Patent number: 6931323
    Abstract: An apparatus for calculating an azimuth angle includes a two-axis earth magnetic sensor, which is mounted on a device that requires azimuth information, for measuring a strength of an earth magnetic field according to the azimuth information if the device moves, an inclinometer for calculating an attitude such as a roll angle and a pitch angle, a signal conditioning unit including an analog-to-digital (A/D) converter for converting sensor data into a digital value, a microprocessor for calculating the azimuth information by compensating for an attitude error using outputs of the two-axis earth magnetic sensor and the inclinometer, a serial communication interface for transmitting the data processed by the microprocessor, and an LCD module for displaying the azimuth information calculated by the microprocessor.
    Type: Grant
    Filed: August 5, 2003
    Date of Patent: August 16, 2005
    Assignee: Samsung Electric Co., Ltd.
    Inventors: Sang-on Choi, Woo-jong Cho, Woo-jong Lee, Chan-gook Park, Seong-yun Cho
  • Publication number: 20040133349
    Abstract: An apparatus for calculating an azimuth angle includes a two-axis earth magnetic sensor, which is mounted on a device that requires azimuth information, for measuring a strength of an earth magnetic field according to the azimuth information if the device moves, an inclinometer for calculating an attitude such as a roll angle and a pitch angle, a signal conditioning unit including an analog-to-digital (A/D) converter for converting sensor data into a digital value, a microprocessor for calculating the azimuth information by compensating for an attitude error using outputs of the two-axis earth magnetic sensor and the inclinometer, a serial communication interface for transmitting the data processed by the microprocessor, and an LCD module for displaying the azimuth information calculated by the microprocessor.
    Type: Application
    Filed: August 5, 2003
    Publication date: July 8, 2004
    Inventors: Sang-On Choi, Woo-Jong Cho, Woo-Jong Lee, Chan-Gook Park, Seong-Yun Cho