Method and system for time difference of arrival (TDOA) location services
First Claim
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1. A system for the determination of the relative time of arrival of a device transmission, comprising:
- (A) a first base station, said first base station further comprising;
(1) an antenna system;
(2) a global positioning system receiver in communication with said antenna system;
(3) a processor in communication with said global positioning system receiver; and
(4) an altitude sensor in communication with said processor; and
(B) a program executing on said processor, said program determining the relative time of arrival of said device transmission to said first base station.
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Abstract
A method and system for determining the location of a mobile transmitting device that uses three dimensional location coordinates to triangulate the location using a time difference of arrival method, with diminishing errors, error correction and which takes advantage of global positioning systems without the requirement of highly accurate clocks in the mobile transmitting device and the base stations.
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Citations
22 Claims
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1. A system for the determination of the relative time of arrival of a device transmission, comprising:
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(A) a first base station, said first base station further comprising;
(1) an antenna system;
(2) a global positioning system receiver in communication with said antenna system;
(3) a processor in communication with said global positioning system receiver; and
(4) an altitude sensor in communication with said processor; and
(B) a program executing on said processor, said program determining the relative time of arrival of said device transmission to said first base station. - View Dependent Claims (2, 5, 6, 7, 8, 9, 11)
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3. (canceled)
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4. (canceled)
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10. (canceled)
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12. A method for the determination of a mobile transmitting device, comprising:
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(A) receiving a signal from said transmitting device to at least three base stations;
(B) determining the number of said base stations, which received, said signal;
(C) triangulating the location of said transmitting device from a plurality of distances between said transmitting device and said base stations. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A system for the determination of the relative time of arrival of a device transmission, comprising:
at least three base stations, wherein each base station comprises;
an antenna system;
a global positioning system receiver in communication with said antenna system;
a processor in communication with said global positioning system receiver;
a reference clock in communication with said processor; and
a program executing on said processor, said program determining the relative time of arrival of said device transmission to said first base station. - View Dependent Claims (22)
Specification