Patents by Inventor Seong-Pal Lee
Seong-Pal 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: 20120119946Abstract: Disclosed is a satellite performance monitoring system. The satellite performance monitoring system may include a satellite communication controlling apparatus that is installed outdoors to transmit a test signal for measuring a performance of a satellite transponder to the satellite transponder and thereby receive a test response signal from the satellite transponder, and to transmit a reference signal to the satellite transponder and thereby receive a reference response signal from the satellite transponder; and a satellite performance monitoring apparatus that is installed indoors to generate the test signal and the reference signal, to generate a frequency response characteristic with respect to the satellite transponder using the test response signal, to compute a signal change amount occurring due to a weather condition using the reference signal and the reference response signal, and to apply the computed signal change amount to the frequency response characteristic.Type: ApplicationFiled: November 15, 2011Publication date: May 17, 2012Applicant: Electronics and Telecommunications Research InstituteInventors: Jin Ho JO, Moon Hee You, Seong Pal Lee, Jae Hoon Kim
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Patent number: 7881663Abstract: Provided are a beacon signal generating apparatus and a phase synchronizing apparatus using the same for establishing a phase synchronization while tracking a phase variation of a Timing Source Oscillator (TSO) of a satellite using a simpler scheme at an earth station, in making a phase synchronization between a clock signal of an On board Switch (OBS) embedded in the satellite and that of the earth station in a Satellite Switched Time Division Multiple Access (SS-TDMA) satellite communication system. The inventive beacon signal generating apparatus embedded in a satellite comprises a frequency oscillator for creating a TSO frequency, a beacon signal generator for multiplying the TSO frequency to be matched with a beacon signal frequency to generate a beacon signal synchronized with the TSO frequency, and a transmitter for transmitting the beacon signal to each of earth stations to recovery a frequency synchronized with the TSO frequency.Type: GrantFiled: December 8, 2005Date of Patent: February 1, 2011Assignee: Electronics and Telecommunications Research InstituteInventors: Jin-Ho Jo, Seong-Pal Lee
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Patent number: 7843359Abstract: A fault management system using a satellite telemetering technology and a method thereof are provided. The fault management system includes: a telemetering sensing unit for collecting telemetering data from target apparatuses, which are installed at a remote location and an unattended location and managed through a satellite, in real time and sensing whether the target apparatuses are malfunctioned or not based on the collected telemetering data; a controlling unit for determining whether the target apparatuses are malfunctioned or not by comparing the telemetering data with unique performance request values for normally driving the target apparatuses, analyzing causes of malfunctions, and storing malfunction data into a malfunction data storing unit; a malfunction data analysis unit for managing the malfunction data stored in the malfunction data storing unit and analyzing the malfunction data; and a display unit for outputting the result of analyzing the malfunction data on a display device.Type: GrantFiled: December 1, 2006Date of Patent: November 30, 2010Assignee: Electronics and Telecommunications Research InstitueInventors: Cheol-Oh Jeong, Yong-Deuk Lee, Jae-Woo Park, Seong-Pal Lee
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Patent number: 7760038Abstract: Provided is a voltage controlled oscillator having a new type of a resonator and a negative resistance part capable of finely tuning negative resistance. Thus, the voltage controlled oscillator has an excellent quality factor characteristic and can finely tune the negative resistance even after its fabrication is completed. The voltage controlled oscillator having an active element includes: a resonating unit for generating an oscillation frequency according to a resonance capacitance; a frequency tuning unit, connected to a source terminal of the active element, for tuning the oscillation frequency; and a negative resistance adjusting unit, connected to the frequency tuning unit, for generating a negative resistance to adjust the oscillation frequency, the negative resistance adjusting unit including a varactor diode for finely adjusting the negative resistance.Type: GrantFiled: December 7, 2005Date of Patent: July 20, 2010Assignee: Electronics and Telecommunications Research InstituteInventors: Yong-Deuk Lee, Cheol-Oh Jeong, Jong-Won Eun, Seong-Pal Lee, Ho-Jin Lee
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Publication number: 20100034137Abstract: Provided are a beacon signal generating apparatus and a phase synchronizing apparatus using the same for establishing a phase synchronization while tracking a phase variation of a Timing Source Oscillator (TSO) of a satellite using a simpler scheme at an earth station, in making a phase synchronization between a clock signal of an On board Switch (OBS) embedded in the satellite and that of the earth station in a Satellite Switched Time Division Multiple Access (SS-TDMA) satellite communication system. The inventive beacon signal generating apparatus embedded in a satellite comprises a frequency oscillator for creating a TSO frequency, a beacon signal generator for multiplying the TSO frequency to be matched with a beacon signal frequency to generate a beacon signal synchronized with the TSO frequency, and a transmitter for transmitting the beacon signal to each of earth stations to recovery a frequency synchronized with the TSO frequency.Type: ApplicationFiled: December 8, 2005Publication date: February 11, 2010Inventors: Jin-Ho Jo, Seong-Pal Lee
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Patent number: 7604168Abstract: An apparatus for transmitting/receiving destination wake-up information through communication satellite network is disclosed. The apparatus includes: an input/output unit for receiving ticketing data from an external device, transmitting the ticketing data to a storing unit and outputting the ticketing data to a baseband processing unit by reading from the storing unit according to transmission conditions; a storing unit for storing the ticketing data based on a control of the controlling unit; a baseband processing unit for converting the ticketing data into a baseband signal; and a wireless transceiving unit for converting the baseband signal into a wireless signal and emitting the wireless signal through a satellite antenna.Type: GrantFiled: December 8, 2004Date of Patent: October 20, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Jong-Won Eun, Cheol-Oh Jeong, Seong-Pal Lee
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Patent number: 7603232Abstract: A vehicle position information transmitter via satellite, a method thereof, a vehicle position tracking system using the same and a method thereof are provided. The transmitter transmits vehicle position information and vehicle ID to the vehicle position information management center through the vehicle position information relay satellite if a satellite network communication state is good as the result of comparing a satellite signal intensity with a mobile communication signal intensity, or transmits vehicle position information and vehicle ID to the vehicle position information management center through the terrestrial network if a terrestrial network communication state is good as the result of comparing a satellite signal intensity with a mobile communication signal intensity.Type: GrantFiled: December 8, 2006Date of Patent: October 13, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Cheon-Sik Sin, Seong-Pal Lee
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Patent number: 7567778Abstract: Provided are an apparatus for controlling a switch of a satellite transponder for multibeam communication, and a method thereof. The apparatus and method can increase output efficiency of communicated satellite electric wave signals and reuse frequencies in one-to-one earth station communication or a one-to-multi earth station communication.Type: GrantFiled: November 18, 2004Date of Patent: July 28, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Jin-Ho Jo, Kyung-Soo Choi, Jong-Won Eun, Seong-Pal Lee
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Patent number: 7542829Abstract: Disclosed is a command planning apparatus of a low-earth orbit satellite, and a low-earth orbit satellite control system including the same. The present invention automates the process of executing the command plan for converting the satellite task schedule planned on the ground into telecommands available by the satellite in the low-earth orbit satellite control system, and automatically selects a data set established by the parameters related to the execution task of the satellite according to the mapping rule.Type: GrantFiled: September 26, 2003Date of Patent: June 2, 2009Assignee: Electronics and Telecommunications Research InstituteInventors: Byoung-Sun Lee, Jeong-Sook Lee, Hee-Sook Mo, Jae-Hoon Kim, Seong-Pal Lee
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Publication number: 20080309419Abstract: Provided is a voltage controlled oscillator having a new type of a resonator and a negative resistance part capable of finely tuning negative resistance. Thus, the voltage controlled oscillator has an excellent quality factor characteristic and can finely tune the negative resistance even after its fabrication is completed. The voltage controlled oscillator having an active element includes: a resonating unit for generating an oscillation frequency according to a resonance capacitance; a frequency tuning unit, connected to a source terminal of the active element, for tuning the oscillation frequency; and a negative resistance adjusting unit, connected to the frequency tuning unit, for generating a negative resistance to adjust the oscillation frequency, the negative resistance adjusting unit including a varactor diode for finely adjusting the negative resistance.Type: ApplicationFiled: December 7, 2005Publication date: December 18, 2008Inventors: Yong-Deuk Lee, Cheol-Oh Jeong, Jong-Won Eun, Seong-Pal Lee, Ho-Jin Lee
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Patent number: 7313124Abstract: Disclosed is an adaptive downlink packet transmission method for a multicarrier Code Division Multiple Access (MC-CDMA) system. The method can allocate radio resources efficiently according to the variations of channel conditions for each user terminal, allocate transmission power appropriately according to the interference from the same cell, and minimize interference to adjacent cells.Type: GrantFiled: July 16, 2004Date of Patent: December 25, 2007Assignee: Electronics and Telecommunications Research InstituteInventors: Kwang-Jae Lim, Sooyoung Kim, Seong-Pal Lee
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Publication number: 20070149119Abstract: Provided are an apparatus for controlling a switch of a satellite transponder for multibeam communication, and a method thereof. The apparatus and method can increase output efficiency of communicated satellite electric wave signals and reuse frequencies in one-to-one earth station communication or a one-to-multi earth station communication.Type: ApplicationFiled: November 18, 2004Publication date: June 28, 2007Inventors: Jin-Ho Jo, Kyung-Soo Choi, Jong-Won Eun, Seong-Pal Lee
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Publication number: 20070150193Abstract: A vehicle position information transmitter via satellite, a method thereof, a vehicle position tracking system using the same and a method thereof are provided. The transmitter transmits vehicle position information and vehicle ID to the vehicle position information management center through the vehicle position information relay satellite if a satellite network communication state is good as the result of comparing a satellite signal intensity with a mobile communication signal intensity, or transmits vehicle position information and vehicle ID to the vehicle position information management center through the terrestrial network if a terrestrial network communication state is good as the result of comparing a satellite signal intensity with a mobile communication signal intensity.Type: ApplicationFiled: December 8, 2006Publication date: June 28, 2007Inventors: Cheon-Sik Sin, Seong-Pal Lee
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Publication number: 20070142062Abstract: A satellite simulation model system based on an interface standard model is disclosed. The system includes a satellite subsystem standard model for simulating operations of physical satellite subsystems; a flight software module for generating a control signal changing operation state of the satellite subsystem standard model; an interface standard model for converting data transmitted from the satellite subsystem standard model and the flight software module into data to receiving components and transmitting the converted data to the receiving components; and a model managing unit for generating the satellite subsystem standard model and the interface standard model as independent component objects and controlling each component object to perform satellite simulation.Type: ApplicationFiled: December 13, 2004Publication date: June 21, 2007Inventors: Sung-Ki Cho, Sang-Uk Lee, Jae-Hoon Kim, Seong-Pal Lee
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Publication number: 20070129009Abstract: A fault management system using a satellite telemetering technology and a method thereof are provided. The fault management system includes: a telemetering sensing unit for collecting telemetering data from target apparatuses, which are installed at a remote location and an unattended location and managed through a satellite, in real time and sensing whether the target apparatuses are malfunctioned or not based on the collected telemetering data; a controlling unit for determining whether the target apparatuses are malfunctioned or not by comparing the telemetering data with unique performance request values for normally driving the target apparatuses, analyzing causes of malfunctions, and storing malfunction data into a malfunction data storing unit; a malfunction data analysis unit for managing the malfunction data stored in the malfunction data storing unit and analyzing the malfunction data; and a display unit for outputting the result of analyzing the malfunction data on a display device.Type: ApplicationFiled: December 1, 2006Publication date: June 7, 2007Inventors: Cheol-Oh Jeong, Yong-Deuk Lee, Jae-Woo Park, Seong-Pal Lee
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Publication number: 20070060046Abstract: An apparatus for repeating a signal from a satellite using a microstrip patch array antenna is disclosed. The apparatus includes: a receiving unit for receiving the signal and amplifying the receiving signal; a radiating unit for radiating the amplified signal to the shadow area; and a feeding unit for feeding the amplified signal to the radiating unit.Type: ApplicationFiled: April 27, 2004Publication date: March 15, 2007Applicant: Electronics and Telecommunication Research InstituInventors: Yong-Min Lee, Jong-Won Eun, Seong-Pal Lee
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Patent number: 7170343Abstract: A fast LUT predistortion apparatus and method for compensating nonlinear distortion of the high power amplifier HPA is disclosed. The apparatus includes a predistortion unit for predistorting an input complex digital signal based on a look up table LUT implementation and outputting a predistorted complex signal; and a power amplifier for amplifying the predistorted signal and outputting an amplified complex signal.Type: GrantFiled: May 27, 2004Date of Patent: January 30, 2007Assignee: Electronics and Telecommunications Research InstituteInventors: Ming-Lu Jin, Soo-Young Kim, Seong-Pal Lee, Do-Seob Ahn, Deock-Gil Oh, Jae-Moung Kim
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Patent number: 7170300Abstract: An apparatus and method for detecting a defect on a ground layer of microstrip by using scattering parameters is disclosed. The apparatus includes: a providing unit for providing a signal to the microstrip by changing a frequency of the signal in a predetermined range of frequencies; a detecting unit for detecting scattering parameters of an output signal from the microstrip in response to the frequency of the signal; and an analyzing unit for analyzing the interface based on the scattering parameters.Type: GrantFiled: August 12, 2004Date of Patent: January 30, 2007Assignee: Electronics and Telecommunications Research InstituteInventors: Sung-Tek Kahng, Jong-Won Eun, Seong-Pal Lee
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Patent number: 7088287Abstract: Provided is an antenna aligning apparatus for near-field measurement, which can perform alignment between a measurement target antenna and a probe antenna precisely by using an antenna pattern and detecting coordinates of the least error. The antenna aligning apparatus includes: a receiving antenna, a signal dividing means, a vertical polarization port, a horizontal polarization port, a first amplitude/phase detector, a second amplitude/phase detector, a coordinate determining means for, and a position adjuster.Type: GrantFiled: December 10, 2004Date of Patent: August 8, 2006Assignee: Electronics and Telecommunications Research InstituteInventors: Jeom-Hun Lee, Jong-Won Eun, Seong-Pal Lee
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Publication number: 20060136103Abstract: Disclosed is a command planning apparatus of a low-earth orbit satellite, and a low-earth orbit satellite control system including the same. The present invention automates the process of executing the command plan for converting the satellite task schedule planned on the ground into telecommands available by the satellite in the low-earth orbit satellite control system, and automatically selects a data set established by the parameters related to the execution task of the satellite according to the mapping rule.Type: ApplicationFiled: September 26, 2003Publication date: June 22, 2006Inventors: Byoung-Sun Lee, Jeong-Sook Lee, Hee-Sook Mo, Jae-Hoon Kim, Seong-Pal Lee