Patents by Inventor Jeom-Hun Lee
Jeom-Hun Lee 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).
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Publication number: 20230289912Abstract: Provided is an intelligent disaster management method and an apparatus using a satellite image. The disaster management method includes receiving a satellite image to monitor a disaster, setting a location of an area for disaster monitoring and a type of disaster to be monitored and selecting at least one satellite image associated with the location of the area and the type of disaster among the received satellite images through a satellite image selection model, synthesizing the selected satellite images through a satellite image synthesis model and generating disaster image data which enables to monitor a disaster, and monitoring a disaster of the area for disaster monitoring by using the disaster image data.Type: ApplicationFiled: December 12, 2022Publication date: September 14, 2023Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Yong Mun PARK, Tae-Gun KANG, Sang-il KIM, Seung Chul KIM, Do-Seob AHN, Joon Gyu RYU, Jeom Hun LEE
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Patent number: 9939513Abstract: Disclosed is a hybrid direction detection apparatus and method that may perform a precise direction detection through a one-time rotation of a log period (LP) antenna and a one-time phase difference measurement of a dipole antenna and may remove an ambiguity error of the LP antenna by two dipole antennas spaced apart by a distance of about 0.5? by finding an approximate direction using the LP antenna that is a directional antenna, by measuring a phase difference between arrival waves using two baselines including two dipole antenna in the corresponding direction, and thereby precisely finding a final direction.Type: GrantFiled: February 23, 2015Date of Patent: April 10, 2018Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom Hun Lee, Jae Hoon Kim, Sang Uk Lee, In One Joo
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Patent number: 9304182Abstract: A hybrid direction apparatus and method that rapidly and accurately detects a direction of a radio signal source based on a direction detecting scheme by comparing an amplitude or signal strength, a virtual Doppler scheme, a phase difference comparison scheme while removing an ambiguity based on an amplitude or signal strength scheme, and identify a direction relatively precisely based on a phase difference scheme using only two antennas. Also, an arrival direction of a relative radio wave when an arrival direction of a radio wave is vertical to a single rotating axis may be precisely identified by mounting a directional antenna and a phase comparison antenna on the single rotating axis, and rotating the two antennas.Type: GrantFiled: February 13, 2013Date of Patent: April 5, 2016Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom Hun Lee, In One Joo, Myung Soon Kim, Cheon Sig Sin, Sang Uk Lee
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Publication number: 20160069979Abstract: Disclosed is a hybrid direction detection apparatus and method that may perform a precise direction detection through a one-time rotation of a log period (LP) antenna and a one-time phase difference measurement of a dipole antenna and may remove an ambiguity error of the LP antenna by two dipole antennas spaced apart by a distance of about 0.5? by finding an approximate direction using the LP antenna that is a directional antenna, by measuring a phase difference between arrival waves using two baselines including two dipole antenna in the corresponding direction, and thereby precisely finding a final direction.Type: ApplicationFiled: February 23, 2015Publication date: March 10, 2016Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom Hun LEE, Jae Hoon KIM, Sang Uk LEE, In One JOO
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Patent number: 9102388Abstract: The present invention relates to an emergency position indicating radio beacon (EPIRB) terminal for confirming positions of ships and rescuing the ships during a marine disaster in a marine search and rescue system and an apparatus and a method for monitoring an operating state of the EPIRB terminal. The EPIRB terminal comprises: a sensor unit for sensing the sinking of a ship in which the EPIRB terminal is provided; a generation unit for generating a distress message corresponding to the sensed result of the sensor unit; and a transmission unit for broadcasting a distress signal including the distress message. The sensor unit comprises: a water-pressure sensor for outputting a water-pressure detection signal by sensing the water pressure in the inside of the ship; a moisture sensor for outputting a moisture detection signal by sensing the moisture inside the ship; and a separation sensor for outputting a separation detection signal by sensing the separation of the EPIRB terminal from the ship.Type: GrantFiled: March 11, 2011Date of Patent: August 11, 2015Assignee: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom-Hun Lee, Sanguk Lee
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Patent number: 8958511Abstract: A system and method for detecting broadband global positioning system (GPS) jamming is provided, the system including a local oscillator maintainer to maintain a plurality of local oscillators, a frequency band selector to select a frequency band in which jamming is to be detected, in response to receipt of a radio frequency (RF) signal, an oscillating signal output unit to allow an oscillating signal to be output from a local oscillator identified based on the selected frequency band, among the plurality of local oscillators, and an intermediate frequency (IF) signal generator to generate an IF signal using the RF signal and the oscillating signal.Type: GrantFiled: September 11, 2013Date of Patent: February 17, 2015Assignee: Electronics and Telecommunications Research InstituteInventors: In One Joo, Jeom Hun Lee, Cheon Sig Sin, Sang Uk Lee
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Publication number: 20150035702Abstract: A global positioning system (GPS) jamming signal receiver and a GPS jamming signal receiving method are provided. The GPS jamming signal receiver may include a sample data generator to generate a sample data signal with respect to a signal received through an GPS antenna; a jamming signal determiner to determine a jamming state of a GPS jamming signal using the sample data signal and a navigation processing result value of the sample data; and a transmission direction angle calculator to determine a phase difference value of the GPS jamming signal according to the determination result and to calculate a transmission direction angle of the GPS jamming signal.Type: ApplicationFiled: June 11, 2014Publication date: February 5, 2015Inventors: In One JOO, Jeom Hun LEE, Sang Uk LEE, Jae Hoon KIM
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Publication number: 20140087678Abstract: The apparatus for receiving a wireless signal with anti-jamming includes: a wireless signal receiving unit receiving a wireless signal and including at least one antenna; and a jamming signal blocking unit disposed in front of the wireless signal receiving unit to block a jamming signal input from at least one direction and having a size or an interval from the wireless signal receiving unit determined according to at least one of an antenna pattern of the wireless signal receiving unit, a direction in which the jamming signal is input, and a level of the jamming signal. According to an exemplary embodiment of the present invention, it is possible to smoothly receive a targeted signal while blocking the jamming signal under the environment in which a general signal and the jamming signal coexist.Type: ApplicationFiled: December 14, 2012Publication date: March 27, 2014Applicant: Electronics And Telecommunications Research InstituteInventors: So Hyeun YUN, Man Seok UHM, Jang Sup CHOI, Chang Soo KWAK, Hong Yeol LEE, Jeom Hun LEE, In Bok YOM
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Publication number: 20140086374Abstract: A system and method for detecting broadband global positioning system (GPS) jamming is provided, the system including a local oscillator maintainer to maintain a plurality of local oscillators, a frequency band selector to select a frequency band in which jamming is to be detected, in response to receipt of a radio frequency (RF) signal, an oscillating signal output unit to allow an oscillating signal to be output from a local oscillator identified based on the selected frequency band, among the plurality of local oscillators, and an intermediate frequency (IF) signal generator to generate an IF signal using the RF signal and the oscillating signal.Type: ApplicationFiled: September 11, 2013Publication date: March 27, 2014Applicant: Electronics and Telecommunications Research InstituteInventors: In One JOO, Jeom Hun LEE, Cheon Sig SIN, Sang Uk LEE
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Publication number: 20130271323Abstract: The direction finding apparatus includes: a first and second antennas configured to receive radio signals respectively; a travel guide unit mechanically coupled with the first and second antennas and configured to provide a travel path along which the first and second antennas are linearly movable; a driver configured to provide a driving force for linearly moving at least one antenna of the first and second antennas in response to a driving control signal; a driving controller configured to provide the driving control signal, wherein the driving control signal is used to separate the first and second antennas from each other by a predetermined distance; and a direction finding unit configured to calculate an angle of arrival (AOA) of radio signals respectively received through the first and second antennas, based on the phase difference between the radio signals, and the predetermined distance.Type: ApplicationFiled: April 16, 2013Publication date: October 17, 2013Applicant: Electronics and Telecommunications Research InstituteInventors: In One JOO, Jeom Hun LEE, Sang Uk LEE
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Publication number: 20120299776Abstract: The present invention relates to an emergency position indicating radio beacon (EPIRB) terminal for confirming positions of ships and rescuing the ships during a marine disaster in a marine search and rescue system and an apparatus and a method for monitoring an operating state of the EPIRB terminal. The EPIRB terminal comprises: a sensor unit for sensing the sinking of a ship in which the EPIRB terminal is provided; a generation unit for generating a distress message corresponding to the sensed result of the sensor unit; and a transmission unit for broadcasting a distress signal including the distress message. The sensor unit comprises: a water-pressure sensor for outputting a water-pressure detection signal by sensing the water pressure in the inside of the ship; a moisture sensor for outputting a moisture detection signal by sensing the moisture inside the ship; and a separation sensor for outputting a separation detection signal by sensing the separation of the EPIRB terminal from the ship.Type: ApplicationFiled: March 11, 2011Publication date: November 29, 2012Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom-Hun Lee, Sanguk Lee
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Publication number: 20110143778Abstract: Provided are a system and method for estimating position of lost mobile terminal and a mobile terminal. The system for estimating position of lost mobile terminal includes a plurality of base stations and a computing apparatus. Each of the base stations transmits an activation signal, receives a terminal ID from the mobile terminal in response to the activation signal, and transmits a reception time of the terminal ID and the terminal ID. The computing apparatus estimates a position of the mobile terminal corresponding to the terminal ID on the basis of the reception time and a position of each of the base stations.Type: ApplicationFiled: December 29, 2009Publication date: June 16, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Yoo La HWANG, Jeom Hun LEE, Byoung Sun LEE, Sang Uk LEE
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Publication number: 20110122019Abstract: Provided are an apparatus for searching a distress signal and a controlling method thereof. The apparatus for searching a distress signal includes: a beacon receiver receiving the distress signal transmitted from a distress beacon apparatus of a COSPAS-SARSAT system; a decoder decoding the distress signal to acquire distress information; and a display unit displaying the acquired distress information. The apparatus for searching a distress signal is used by a search and rescue team.Type: ApplicationFiled: November 17, 2010Publication date: May 26, 2011Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom Hun LEE, Sang Uk Lee, Jae Hoon Kim
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Publication number: 20100066600Abstract: A mobile apparatus for tracking a satellite, includes: a mobile unit; a GPS receiving unit mounted on the mobile unit that generates position coordinates of the mobile unit; a level meter mounted on the mobile unit that adjusts the mobile unit in horizontal and obtains a tilt angle of the mobile unit; an antenna unit mounted on the mobile unit and being adjusted to the true north direction according to the position coordinates. Further, the mobile apparatus for tracking a satellite includes position tracking control unit mounted on the mobile unit that temporarily stops the mobile unit when tracking a position of the satellite, adjusts the mobile unit in horizontal by the level meter and aligns the position coordinates and the tile angles to correct current position information of the mobile unit.Type: ApplicationFiled: October 31, 2007Publication date: March 18, 2010Applicant: ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTEInventors: Jeom Hun Lee, Sang Uk Lee, In One Joo, Tae Hee Kim, Jae Hoon Kim
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Publication number: 20100039335Abstract: Provided are an apparatus and method for measuring an antenna gain. The apparatus includes an antenna gain-to-noise-temperature (G/T) ratio calculator for calculating a G/T ratio using a reception noise power measured while an antenna is tracking the sun, a noise temperature measurer for measuring a noise temperature when a signal is transmitted or received through the antenna, and an antenna gain calculator for calculating an antenna gain using the calculated G/T ratio and the measured noise temperature. Thus, it is possible to easily measure the antenna gain of a ground station without a reference antenna or a satellite-mounted device capable of functioning as a reference antenna.Type: ApplicationFiled: July 16, 2009Publication date: February 18, 2010Inventors: Jeom-hun LEE, Sang-uk LEE, Jae-hoon KIM, Tae-hee KIM
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Patent number: 7653501Abstract: Provided are an apparatus and method for determining a diameter of a reflector antenna.Type: GrantFiled: December 26, 2005Date of Patent: January 26, 2010Assignee: Electronics ADN Telecommunications Research InstituteInventors: Jeom-hun Lee, Jae-Hoon Kim, Ho-Jin Lee
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Patent number: 7643792Abstract: Provided is a satellite ground control system and method based on a communication satellite. The system includes: a communication satellite link means for monitoring and controlling a system device and transmitting remote measurement data and a process result to the central control station; an interface for analyzing the command, transmitting the command to a processing means and transmitting remote measurement data and a process result to the communication satellite link means; a satellite operating means for receiving a command from the interface, transforming the command into a remote command and transmitting remote measurement data to the interface; and a control satellite link means for transmitting the received remote command, receiving the remote measurement data, transmitting the remote measurement data to the satellite operating means, and transmitting a process result of monitor and control of a corresponding system device to the interface.Type: GrantFiled: December 28, 2006Date of Patent: January 5, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Tae-Hee Kim, Jeom-Hun Lee, Jae-Hoon Kim
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Patent number: 7456783Abstract: Provided is a Global Positioning System (GPS) signal repeater and a GPS receiver of a stationary orbit satellite, and a method for positioning a stationary orbit satellite using the same. The GPS signal repeater includes: a GPS receiver for receiving an L-band GPS signal transmitted from a GPS satellite; a low-noise amplifier for removing noise of the received L-band GPS signal and maximally amplifying a desired signal; a frequency transformer for transforming the amplified L-band GPS signal into an up-link frequency band; a high power amplifier for amplifying the transformed up-link frequency band GPS signal; and a transmitter for transmitting the amplified signal to a stationary orbit satellite.Type: GrantFiled: November 16, 2006Date of Patent: November 25, 2008Assignee: Electronics and Telecommunications Research InstituteInventors: In-One Joo, Jeom-Hun Lee, Jae-Hoon Kim
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Publication number: 20080249739Abstract: Provided are an apparatus and method for determining a diameter of a reflector antenna.Type: ApplicationFiled: December 26, 2005Publication date: October 9, 2008Applicant: Electronics And Telecommunications Research InstituteInventors: Jeom-Hun Lee, Jae-Hoon Kim, Ho-Jin Lee
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Publication number: 20080092180Abstract: Provided is a satellite ground control system and method based on a communication satellite. The system includes: a communication satellite link means for monitoring and controlling a system device and transmitting remote measurement data and a process result to the central control station; an interface for analyzing the command, transmitting the command to a processing means and transmitting remote measurement data and a process result to the communication satellite link means; a satellite operating means for receiving a command from the interface, transforming the command into a remote command and transmitting remote measurement data to the interface; and a control satellite link means for transmitting the received remote command, receiving the remote measurement data, transmitting the remote measurement data to the satellite operating means, and transmitting a process result of monitor and control of a corresponding system device to the interface.Type: ApplicationFiled: December 28, 2006Publication date: April 17, 2008Inventors: Tae-Hee Kim, Jeom-Hun Lee, Jae-Hoon Kim