APPARATUS AND METHOD FOR CALCULATING POSITION OF MOBILE TERMINAL
First Claim
1. An apparatus to calculate a position of a mobile terminal, comprising:
- a storage to store global positioning system (GPS) reference information corresponding to at least three GPS satellites;
an updater to receive GPS satellite signals from the at least three GPS satellites, and to update the GPS reference information if an information update event occurs; and
a position calculation unit to detect synchronization signals of the GPS satellite signals, and to calculate a position of the mobile terminal using the synchronization signals and the GPS reference information stored in the storage if a position calculation event occurs.
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Accused Products
Abstract
An apparatus that calculates a mobile terminal position includes storage, an updater to receive global positioning system (GPS) satellite signals, and a position calculation unit. The apparatus stores GPS reference information, which is updated if an information update event occurs. Then, if a position calculation event occurs, the apparatus receives synchronization signals from the GPS satellite signals and calculates the position of the mobile terminal using the synchronization signals and the stored GPS reference information. A method for calculating a position of a mobile terminal includes calculating a transmission time period of each GPS satellite signal using synchronization signals, calculating a distance between each GPS satellite and the mobile terminal, calculating positions of the GPS satellites using GPS reference information, and calculating the position of the mobile terminal using GPS satellite positions and distances between the GPS satellites and mobile terminal.
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Citations
14 Claims
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1. An apparatus to calculate a position of a mobile terminal, comprising:
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a storage to store global positioning system (GPS) reference information corresponding to at least three GPS satellites; an updater to receive GPS satellite signals from the at least three GPS satellites, and to update the GPS reference information if an information update event occurs; and a position calculation unit to detect synchronization signals of the GPS satellite signals, and to calculate a position of the mobile terminal using the synchronization signals and the GPS reference information stored in the storage if a position calculation event occurs. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for calculating a position of a mobile terminal, comprising:
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a transmission time acquisition step of obtaining, at the mobile terminal, transmission times of global positioning system (GPS) satellite signals received from at least three GPS satellites if a position calculation event occurs, the transmission times obtained from synchronization signals of the GPS satellite signals; a transmission time period calculation step of calculating transmission time periods of the GPS satellite signals; a distance calculation step of calculating distances between the at least three GPS satellites and the mobile terminal; a satellite position calculation step of calculating positions of the at least three GPS satellites using GPS reference information about the at least three GPS satellites stored in advance of the position calculation event; and a mobile terminal position calculation step of calculating a position of the mobile terminal using the distances between the at least three GPS satellites and the mobile terminal, and the positions of the at least three GPS satellites. - View Dependent Claims (10, 11, 12, 13, 14)
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Specification