DEAD RECONING SYSTEM BASED ON LOCALLY MEASURED MOVEMENT
First Claim
1. A method of improving position determination of a cellular device using locally measured movement, the method comprising:
- accessing a Global Navigation Satellite System (GNSS) chipset embedded within the cellular device, wherein the GNSS chipset calculates raw pseudoranges;
extracting the raw pseudoranges from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset;
calculating a position fix based on the raw pseudoranges;
obtaining, at a first point in time, a first image with an image capturing device that is in a known physical relationship with the cellular device;
obtaining, at a second point in time, a second image with the image capturing device;
calculating an estimate of a distance that the cellular device moved from the first point in time to the second point in time by processing image data collected for a time frame from the first point in time to the second point in time; and
processing the position fix based on the estimate of the distance,wherein the accessing, the extracting, the calculating of the position fix, the obtaining the first image, the obtaining the second image, the calculating of the estimate, and the processing of the position fix are performed by one or more hardware processors located in the cellular device and outside of the GNSS chipset.
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Accused Products
Abstract
A Global Navigation Satellite System (GNSS) chipset embedded within the cellular device is accessed. The GNSS chipset calculates raw pseudoranges. The raw pseudoranges are extracted from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset. A position fix is calculated based on the raw pseudoranges. At a first point in time, a first image, and at a second point in time, a second image are obtained with an image capturing device that is in a known physical relationship with the cellular device. An estimate of a distance that the cellular device moved from the first point in time to the second point in time is calculated by processing image data collected from the first point in time to the second point in time. The position fix is processed based on the estimate of the distance.
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Citations
22 Claims
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1. A method of improving position determination of a cellular device using locally measured movement, the method comprising:
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accessing a Global Navigation Satellite System (GNSS) chipset embedded within the cellular device, wherein the GNSS chipset calculates raw pseudoranges; extracting the raw pseudoranges from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset; calculating a position fix based on the raw pseudoranges; obtaining, at a first point in time, a first image with an image capturing device that is in a known physical relationship with the cellular device; obtaining, at a second point in time, a second image with the image capturing device; calculating an estimate of a distance that the cellular device moved from the first point in time to the second point in time by processing image data collected for a time frame from the first point in time to the second point in time; and processing the position fix based on the estimate of the distance, wherein the accessing, the extracting, the calculating of the position fix, the obtaining the first image, the obtaining the second image, the calculating of the estimate, and the processing of the position fix are performed by one or more hardware processors located in the cellular device and outside of the GNSS chipset. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A system for improving position determination of a cellular device using locally measured movement, the system comprising:
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accessing logic that accesses a Global Navigation Satellite System (GNSS) chipset embedded within the cellular device, wherein the GNSS chipset calculates raw pseudoranges; extracting logic that extracts the raw pseudoranges from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset; position fix determining logic that calculates a position fix based on the raw pseudoranges; image capturing device movement information accessing logic that obtains, at a first point in time, a first image with an image capturing device that is in a known physical relationship with the cellular device and that obtains, at a second point in time, a second image with the image capturing device; and processing logic that calculates an estimate of a distance that the cellular device moved from the first point in time to the second point in time by processing image data collected for a time frame from the first point in time to the second point in time, and that processes the position fix based on the estimate of the distance, wherein the accessing logic, the extracting logic, the image capturing device movement information accessing logic and the processing logic are performed by one or more hardware processors located in the cellular device and outside of the GNSS chipset. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A non-transitory computer readable storage medium having computer readable instructions stored thereon for causing a computer system to perform a method of improving position determination of a cellular device using locally measured movement, the method comprising:
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accessing a Global Navigation Satellite System (GNSS) chipset embedded within the cellular device, wherein the GNSS chipset calculates raw pseudoranges; extracting the raw pseudoranges from the GNSS chipset for processing elsewhere in the cellular device outside of the GNSS chipset; calculating a position fix based on the raw pseudoranges; obtaining, at a first point in time, a first image with an image capturing device that is in a known physical relationship with the cellular device; obtaining, at a second point in time, a second image with the image capturing device; calculating an estimate of a distance that the cellular device moved from the first point in time to the second point in time by processing image data collected for a time frame from the first point in time to the second point in time; and processing the position fix based on the estimate of the distance, wherein the accessing, the extracting, the calculating of the position fix, the obtaining the first image, the obtaining the second image, the calculating of the estimate, and the processing of the position fix are performed by one or more hardware processors located in the cellular device and outside of the GNSS chipset. - View Dependent Claims (20, 21, 22)
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Specification