System and method for verifying consistent measurements in performing GPS positioning
First Claim
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1. A method for verifying whether a set of satellite signals from a plurality of GPS satellites is useful to determine a suitable estimated position of a GPS receiver associated with a user, the method comprising:
- determining, by a processor included in the GPS receiver, a geometric configuration formed by an approximate position of the user and the GPS satellites'"'"' positions, the geometric configuration thereby defining a positional relationship between each of the user and the GPS satellites and being in terms of azimuth and elevation;
based on the geometric configuration, determining if the satellites are sufficiently close to one another to yield consistent measurements for which ranging difference uncertainties are smaller than a predetermined value.
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Abstract
Systems and methods are provided for verifying whether a set of satellite signals may be used to calculate an estimated position. Example systems and methods may include a GPS receiver for receiving the satellite signals and a measurement consistency verifier to analyze a geometric configuration of the satellites from which the satellite signals were acquired. The measurement consistency verifier may determine if the satellites are sufficiently close to one another to provide consistent measurements.
71 Citations
20 Claims
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1. A method for verifying whether a set of satellite signals from a plurality of GPS satellites is useful to determine a suitable estimated position of a GPS receiver associated with a user, the method comprising:
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determining, by a processor included in the GPS receiver, a geometric configuration formed by an approximate position of the user and the GPS satellites'"'"' positions, the geometric configuration thereby defining a positional relationship between each of the user and the GPS satellites and being in terms of azimuth and elevation; based on the geometric configuration, determining if the satellites are sufficiently close to one another to yield consistent measurements for which ranging difference uncertainties are smaller than a predetermined value. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for verifying whether a set of satellite signals from a plurality of GPS satellites is useful to calculate an estimated position, the system comprising:
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a GPS receiver associated with a user for receiving the satellite signals; a measurement consistency verifier to analyze a geometric configuration that defines a positional relationship between each of the user and the GPS satellites from which the satellite signals were acquired and to determine if the GPS satellites are sufficiently close to one another to provide consistent measurements for which ranging difference uncertainties are smaller than a predetermined value. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15, 16)
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17. A mobile communications device for communicating over a mobile communications network, the mobile handset comprising:
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a mobile communications transceiver for transmitting and receiving to and from a mobile communications network station; a Satellite Positioning System (SATPS) receiver for receiving satellite signals from SATPS satellites; an aiding data function for receiving aiding data from the mobile communications network station; an assisted acquisition function to use the aiding data and a minimum set of satellite signals to determine an estimated position; a measurement consistency verifier to analyze a geometric configuration that defines a positional relationship between each of the satellites from which the satellite signals were received and to determine if the satellites are sufficiently close to one another to provide consistent measurements for which ranging difference uncertainties are smaller than a predetermined value. - View Dependent Claims (18)
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19. A Satellite Positioning System (SATPS) receiver for receiving satellite signals from SATPS satellites, the SATPS receiver comprising:
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a mobile communications network interface for receiving aiding data from a mobile communications network; an assisted acquisition function to use the aiding data and a minimum set of satellite signals to determine an estimated position; and a measurement consistency verifier to analyze a geometric configuration that defines a positional relationship between each of the satellites from which the satellite signals were received and to determine if the satellites are sufficiently close to one another to provide consistent measurements for which ranging difference uncertainties are smaller than a predetermined value. - View Dependent Claims (20)
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Specification