Patent application number | Description | Published |
20100034137 | BEACON SIGNAL GENERATING APPARATUS IN SATELLITE COMMUNICATION SYSTEM AND PHASE SYNCHRONIZING APPARATUS USING THE SAME - 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. | 02-11-2010 |
20120112925 | APPARATUS AND METHOD FOR MONITORING STATUS OF SATELLITE TRANSPONDER USING STATISTICAL ANALYSIS OF TELEMETRY DATA - Provided are an apparatus and a method for monitoring a status of a satellite transponder using a statistical analysis of telemetry data, which may disclose a configuration to receive at least one of an input signal level and an output signal level with respect to a satellite transponder, to receive telemetry data with respect to the satellite transponder, and to statistically analyze the telemetry data based on the at least one of the input signal level and the output signal level. | 05-10-2012 |
20120119946 | SYSTEM AND METHOD FOR TESTING PERFORMANCE OF TRANSPONDER - 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. | 05-17-2012 |
20130137363 | APPARATUS AND METHOD FOR COMMUNICATION SATELLITE MONITORING - Provided is an apparatus for monitoring a communication satellite, including: a receiver to receive at least one satellite service signal from a satellite repeater; a measurement unit to measure a frequency, a bandwidth, and a magnitude of the at least one satellite service signal; a controller to determine whether a signal transmitting station malfunctions by comparing the at least one satellite service signal with a predetermined reference value based on the measurement result; and a communication unit to inform an operator terminal about a malfunction of the signal transmitting station when the signal transmitting station is determined to malfunction. | 05-30-2013 |
20140087653 | APPARATUS AND METHOD FOR MANAGING SATELLITE SERVICE RESOURCE - An apparatus and method for managing a satellite service resource is provided. The method may include measuring, using a communication system monitoring unit, at least one satellite service signal being received for at least one satellite service, calculating, using a service resource management unit, an optimum frequency and an optimum output power for the at least one satellite service through analysis of a satellite service resource, allocating the calculated frequency and the calculated output power to the at least one satellite service, and transmitting the allocated information to the communication system monitoring unit, and comparing, using the communication system monitoring unit, the measured information to the allocated information, and transmitting a result of the comparison to the service resource management unit. | 03-27-2014 |
20140213195 | APPARATUS AND METHOD FOR ANALYZING EFFECT ON WIRELESS COMMUNICATION SYSTEM BY SOLAR COSMIC RADIO WAVE - Provided is an apparatus and method for analyzing an effect on a wireless communication system that may analyze an effect of a solar activity on a wireless communication system based on strength of solar cosmic radio waves. An apparatus for analyzing an effect on a wireless communication system may include a solar cosmic radio wave strength collecting unit to collect strength of solar cosmic radio waves according to a solar activity; and an interference determining unit to determine a level of interference of the solar activity against the wireless communication system, based on the strength of solar cosmic radio waves. | 07-31-2014 |
20140222255 | APPARATUS AND METHOD FOR MONITORING STATUS OF SATELLITE - Provided is an apparatus and method for monitoring a status of a satellite, including classifying satellite telemetry information and space weather information and storing the information in a storage unit including respective databases, predicting whether a predetermined type of satellite failure occurs based on the space weather information, and generating satellite control command information to change a status of a predetermined satellite configuration when a satellite failure determining index used to determine a possibility of the satellite failure is beyond a predetermined critical alert range. | 08-07-2014 |
20150192670 | METHOD AND APPARATUS FOR EXTRACTING IONOSPHERIC TRACE - A method and apparatus for extracting an ionospheric trace are provided. The trace extraction method includes: searching for a signal data having maximum strength among signal data displayed on an ionogram of the ionosphere; selecting the point where the signal data having maximum strength is placed as a first point; extracting the trace on the right side of the first point while increasing frequency of the signal data; and extracting the trace on the left side of the first point while decreasing the frequency. | 07-09-2015 |