INDOOR LOCATION DETERMINATION
First Claim
1. A method for determining an indoor location of a transmitter, comprising the steps of:
- a) inside an indoor environment, performing an angle of arrival (AOA) triangulation procedure on the transmitter to provide a tentative indoor transmitter location; and
b) using at least one added input to ensure that the tentative transmitter location is an accurate indoor transmitter location.
4 Assignments
0 Petitions
Accused Products
Abstract
A tentative location of a transmitter in an indoor environment is determined by triangulation, using at least two direction finders. The tentative location is made more accurate by performing at least one added action selected from the following: checking the likelihood that the tentative location is an accurate location by comparing measured transmitter signal strengths with calculated signal strengths, using a known indoor environment structure, using a record of the transmitter movement through the indoor environment for determining whether the transmitter is located in an obscured area of the indoor environment or performing an alignment procedure on the antennas to improve the triangulation.
87 Citations
20 Claims
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1. A method for determining an indoor location of a transmitter, comprising the steps of:
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a) inside an indoor environment, performing an angle of arrival (AOA) triangulation procedure on the transmitter to provide a tentative indoor transmitter location; and b) using at least one added input to ensure that the tentative transmitter location is an accurate indoor transmitter location. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for determining a location of a transmitter, comprising the steps of:
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a) inside an indoor environment, performing an angle of arrival (AOA) triangulation procedure on the transmitter to provide a tentative indoor transmitter location; b) calculating a signal strength expected from the respective transmitter; c) comparing the calculated signal strength with a measured signal strength of the respective transmitter to obtain a correlation value; d) comparing the correlation value with a threshold; e) based on the comparison, determining if the tentative indoor transmitter location is an accurate location. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification