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US 10,378,897 B2Granted
Determination of positioning information of a mobile device using modulated light signals
AssigneeQUALCOMM Incorporated
InventorsAleksandar Jovicic, Thomas J. Richardson
Life of this patent
Estimating the term…
Abstract
Methods, systems, and devices are described for determining positioning information of a mobile device using modulated light signals. A modulated light signal may be received from each of at least one light source. Each modulated light signal may be decoded to obtain identification information identifying the at least one light source. An angle of arrival of each modulated light signal may also be identified. Each angle of arrival of may be associated with an identified light source.
Claims30
A method for determining positioning information of a mobile device using modulated light signals, comprising:
- receiving, at the mobile device, a modulated light signal from each of at least two light sources;
- decoding, by the mobile device, each modulated light signal to obtain identification information identifying the at least two light sources;
- estimating, by the mobile device, a relative angle of arrival of each modulated light signal with respect to a coordinate system of the mobile device;
- acquiring, at the mobile device, measurements of an orientation of the mobile device using an orientation sensor;
- estimating, by the mobile device, an absolute angle of arrival of each modulated light signal with respect to an absolute coordinate system based at least in part on the acquired measurements and the relative angle of arrival;
- measuring the distance between two illuminated regions captured by an image sensor of the mobile device, the two illuminated regions corresponding to at least the at least two light sources in a horizontal plane vertically removed from the mobile device having a known distance between the at least two light sources;
- estimating, a height from the mobile device of each of the at least two light sources based at least in part on the measured distance and the known distance between the at least two light sources;
- estimating distances, in three dimensions, from the mobile device to each of the at least two lights sources based at least in part on the absolute angle of arrival of each respective modulated light signal and the estimated height;
- identifying a location of each of the at least two light sources;
- and
- determining, by the mobile device, a position of the mobile device based at least in part on the identified location of each of the at least two light sources and the estimated distances.
8 more elements
Apparatus for determining positioning information using modulated light signals, comprising:
- a processor;
- memory in electronic communication with the processor;
- and
- instructions stored in the memory, the instructions being executable by the processor to:
- receive, at a mobile device, a modulated light signal from each of at least two light sources;
- decode, by the mobile device, each modulated light signal to obtain identification information identifying the at least two light sources;
- estimate, by the mobile device, a relative angle of arrival of each modulated light signal with respect to a coordinate system of the mobile device;
- acquire, at the mobile device, measurements of an orientation of the mobile device using an orientation sensor;
- estimate, by the mobile device, an absolute angle of arrival of each modulated light signal with respect to an absolute coordinate system based at least in part on the acquired measurements and the relative angle of arrival;
- measure the distance between two illuminated regions captured by an image sensor of the mobile device, the two illuminated regions corresponding to at least the at least two light sources in a horizontal plane vertically removed from the mobile device having a known distance between the at least two light sources;
- estimate, a height from the mobile device of each of the at least two light sources based at least in part on the measured distance and the known distance between the at least two light sources;
- estimate distances, in three dimensions, from the mobile device to each of the at least two lights sources based at least in part on the absolute angle of arrival of each respective modulated light signal and the estimated height;
- identify a location of each of the at least two light sources;
- and
- determine, by the mobile device, a position of the mobile device based at least in part on the identified location of each of the at least two light sources and the estimated distances.
12 more elements
A computer program product for determining positioning information of a mobile device using modulated light signals, the computer program product comprising a non-transitory computer-readable medium storing instructions executable by a processor to:
- receive, at the mobile device, a modulated light signal from each of at least two light sources;
- decode, by the mobile device, each modulated light signal to obtain identification information identifying the at least two light sources;
- estimate, by the mobile device, a relative angle of arrival of each modulated light signal with respect to a coordinate system of the mobile device;
- acquire, at the mobile device, measurements of an orientation of the mobile device using an orientation sensor;
- estimate, by the mobile device, an absolute angle of arrival of each modulated light signal with respect to an absolute coordinate system based at least in part on the acquired measurements and the relative angle of arrival;
- measure the distance between two illuminated regions captured by an image sensor of the mobile device, the two illuminated regions corresponding to at least the at least two light sources in a horizontal plane vertically removed from the mobile device having a known distance between the at least two light sources;
- estimate, a height from the mobile device of each of the at least two light sources based at least in part on the measured distance and the known distance between the at least two light sources;
- estimate distances, in three dimensions, from the mobile device to each of the at least two lights sources based at least in part on the absolute angle of arrival of each respective modulated light signal and the estimated height;
- identify a location of each of the at least two light sources;
- and
- determine, by the mobile device, a position of the mobile device based at least in part on the identified location of each of the at least two light sources and the estimated distances.
8 more elements
Dependencies are inferred from the claim text.