System and method for indoor location tracking using pseudo GPS signal transmitter
First Claim
1. A system for tracking the location of a terminal in an indoor space, the system comprising:
- a GPS signal receiving antenna for receiving a GPS signal sent from an artificial satellite;
a pseudo GPS signal transmitter including the GPS signal receiving antenna, and for generating a pseudo GPS signal based on the GPS signal received by the GPS signal receiving antenna; and
a plurality of GPS transmitting antennas for sending the pseudo GPS signal generated by the pseudo GPS signal transmitter to enable the terminal located in the indoor space to track the location,wherein the pseudo GPS signal transmitter comprises;
a GPS signal receiving unit that receives the GPS signal received by the GPS signal receiving antenna, extracts a clock signal of the artificial satellite contained in the GPS signal, and outputs the extracted clock signal as a reference GPS signal;
a clock synchronization unit that performs clock synchronization with the artificial satellite based on the reference GPS signal output from the GPS signal receiving part;
a pseudo GPS signal generating unit that contains identification information of the GPS transmitting antennas, location information of the GPS transmitting antennas, and pseudo GPS signal transmission time information, and generates a pseudo GPS signal; and
a signal transmitter that relays the pseudo GPS signal generated by the pseudo GPS signal generating unit to send the same outwherein the pseudo GPS signal transmitter further comprises;
a transmission signal control unit that controls the sequence and interval of the pseudo GPS signal to be sent;
a signal processing unit that generates a transmission frame to be sent to the GPS transmitting antennas; and
an information storage unit that stores identification information of the GPS transmitting antennas and location information of the GPS transmitting antennas.
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Accused Products
Abstract
To track the location of a terminal in an indoor space by using a pseudo GPS signal transmitter, a GPS signal sent from an artificial satellite is received, and a clock signal of the artificial satellite is extracted from the received GPS signal to perform synchronization with the artificial satellite. Once synchronization with the artificial satellite is performed, a pseudo GPS signal is generated, and the transmission time of the pseudo GPS signal is controlled. The GPS signal is sent to the terminal located in the indoor space by a plurality of transmitting antennas based on the controlled transmission time, thereby enabling the terminal located in the indoor space to track its location.
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Citations
4 Claims
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1. A system for tracking the location of a terminal in an indoor space, the system comprising:
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a GPS signal receiving antenna for receiving a GPS signal sent from an artificial satellite; a pseudo GPS signal transmitter including the GPS signal receiving antenna, and for generating a pseudo GPS signal based on the GPS signal received by the GPS signal receiving antenna; and a plurality of GPS transmitting antennas for sending the pseudo GPS signal generated by the pseudo GPS signal transmitter to enable the terminal located in the indoor space to track the location, wherein the pseudo GPS signal transmitter comprises; a GPS signal receiving unit that receives the GPS signal received by the GPS signal receiving antenna, extracts a clock signal of the artificial satellite contained in the GPS signal, and outputs the extracted clock signal as a reference GPS signal; a clock synchronization unit that performs clock synchronization with the artificial satellite based on the reference GPS signal output from the GPS signal receiving part; a pseudo GPS signal generating unit that contains identification information of the GPS transmitting antennas, location information of the GPS transmitting antennas, and pseudo GPS signal transmission time information, and generates a pseudo GPS signal; and a signal transmitter that relays the pseudo GPS signal generated by the pseudo GPS signal generating unit to send the same out wherein the pseudo GPS signal transmitter further comprises; a transmission signal control unit that controls the sequence and interval of the pseudo GPS signal to be sent; a signal processing unit that generates a transmission frame to be sent to the GPS transmitting antennas; and an information storage unit that stores identification information of the GPS transmitting antennas and location information of the GPS transmitting antennas. - View Dependent Claims (2, 3, 4)
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Specification