Method and Apparatus for Determining the Geographic Location of a Device
First Claim
1. In a method for determining the location of a device receiving signals from each of a plurality of satellites, the device having determined a first location from the received signals, the improvement comprising the steps of:
- (a) comparing a quality of the first location of the device with a predetermined threshold; and
(b) determining additional locations of the device for each different combination of the received signals while leaving out N signal from the received signals if the quality of the first location is not within the predetermined threshold,wherein N is a positive integer.
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Accused Products
Abstract
A method and apparatus for determining the location of a device from signals provided by a plurality of satellites. A device receives a first plurality of signals comprising one signal from each of a first plurality of satellites and determines a first location of the device as a function of the first plurality of signals. The device then determines a second location thereof as a function of a second plurality of signals if the first location is not within a predetermined threshold. The second plurality of signals is a first subset of the first plurality of signals.
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Citations
29 Claims
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1. In a method for determining the location of a device receiving signals from each of a plurality of satellites, the device having determined a first location from the received signals, the improvement comprising the steps of:
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(a) comparing a quality of the first location of the device with a predetermined threshold; and (b) determining additional locations of the device for each different combination of the received signals while leaving out N signal from the received signals if the quality of the first location is not within the predetermined threshold, wherein N is a positive integer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A system for determining a location of a device from signals received from a plurality of Global Navigation Satellite System (“
- GNSS”
) satellites comprising;a receiver for receiving signals from each of a plurality of satellites; a means for determining a first location of the device as a function of a quality of the received signals; and a means for determining additional locations of the device as a function of each subset of said received signals while leaving out N signal from the received signals if said quality is not within a predetermined threshold, wherein N is a positive integer. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18)
- GNSS”
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19. A method of calculating the position of a device comprising the steps of:
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(a) receiving a first plurality of observations from a first plurality of satellites; (b) determining a first position of the device as a function of a quality of the first plurality of observations; (c) if the quality of the first plurality of observations fails to meet the predefined threshold then; (i) determining a second position of the device as defined by a quality of a second plurality of observations, the second plurality being a subset of the first plurality of observations, (ii) if the quality of the second plurality of observations fails to meet the predefined threshold then repeating step (i) for each subset of the first plurality of observations while leaving out at least one received observation, and (iii) determining additional positions of the device using incrementally decreasing subsets of observations until a predetermined criteria is achieved. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification