Patent application number | Description | Published |
20100066600 | MOBILE APPARATUS FOR TRACKING SATELLITE AND METHOD THEREOF - 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. | 03-18-2010 |
20110241937 | APPARATUS AND METHOD FOR SIGNAL ACQUISITION IN GLOBAL NAVIGATION SATELLITE SYSTEM RECEIVER - An apparatus for signal acquisition of a Global Navigation Satellite System (GNSS) receiver may downsample digitalized satellite signals based on a code resolution, correlate the downsampled satellite signals and oversampled pseudo-random noise (PRN) codes using a block unit based on a size of a matching filter, and may perform FFT of a value output as a correlation result by employing, as M points, a number of blocks used for the matching filter. Also, the signal acquisition apparatus may estimate a coarse Doppler and a code phase of the satellite signals by comparing a power value, calculated based on the M-point fast Fourier transformed value, with a threshold value, and may estimate a fine Doppler using zero-padding based FFT when the satellite signals are successfully acquired. | 10-06-2011 |
20110279313 | APPARATUS AND METHOD FOR PROCESSING NAVIGATION SIGNAL - An apparatus and method for processing a navigation signal are provided. When a navigation signal is received and processed, a search range associated with signal processing may be reduced by directly computing a clock offset of a receiving terminal, and accordingly it is possible to reduce an operation amount associated with the signal processing, and an amount of a power consumed by the receiving terminal. Additionally, due to a reduction in the search range, it is also possible to reduce a time required to acquire a signal. | 11-17-2011 |
20130093619 | APPARATUS AND METHOD FOR INDOOR POSITIONING - Provided is a technique for estimating an indoor position, by which a terminal may receive a positioning signal from a pseudo satellite, using a plurality of receiving antennas, determine a position of the pseudo satellite based on positional information included in the received positioning signal, estimate a direction of the pseudo satellite based on a phase difference of the positioning signal at each of the plurality of receiving antennas, and estimate a location of the terminal based on the positional information of the pseudo satellite and the estimated direction of the pseudo satellite. | 04-18-2013 |
20130207844 | HYBRID DIRECTION IDENTIFYING APPARATUS AND METHOD - 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. | 08-15-2013 |
20130271323 | APPARATUS AND METHOD FOR FINDING THE DIRECTION OF SIGNAL SOURCE - 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. | 10-17-2013 |
20140086374 | SYSTEM AND METHOD FOR DETECTING BROADBAND GLOBAL POSITIONING SYSTEM (GPS) JAMMING - 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. | 03-27-2014 |
20150035702 | GPS JAMMING SIGNAL RECEIVER AND GPS JAMMING SIGNAL RECEIVING METHOD - 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. | 02-05-2015 |