Satellite positioning system receiver time determination in minimum satellite coverage
First Claim
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1. A method in a satellite positioning system receiver, the method comprising:
- acquiring a set of satellite positioning system satellites;
determining time from at least two satellite subset times, the satellite subset times obtained based on over-determined position solutions for at least two different subsets of the satellites acquired.
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Abstract
A method in a satellite positioning system receiver, including acquiring (210) a set of satellite positioning system satellites, determining (220) satellite subset time based on over-determined position solutions for at least two different subsets of the satellites acquired, determining (230) satellite time from at least two satellite subset times, computing (250) a position solution based on the satellite time or a refined (240) satellite time.
33 Citations
21 Claims
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1. A method in a satellite positioning system receiver, the method comprising:
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acquiring a set of satellite positioning system satellites;
determining time from at least two satellite subset times, the satellite subset times obtained based on over-determined position solutions for at least two different subsets of the satellites acquired. - View Dependent Claims (2, 3, 6, 7, 8, 9)
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4. The method 3, determining satellite subset time for at least two satellite subsets using corresponding satellite subset pseudorange information and using receiver altitude information.
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5. The method 1, determining time from at least two of the satellite subset times by combining the at least two satellite subset times.
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10. A method in a satellite positioning system receiver, the method comprising:
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acquiring a set of satellite positioning system satellites;
determining a satellite subset time from at least two subsets of the satellites acquired;
weighting the at least two satellite subset times if the satellite subset time having a least error variance does not satisfy an accuracy requirement;
determining time from the weighted satellite subset times. - View Dependent Claims (11, 12, 13, 14)
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15. A method in a satellite positioning system receiver, the method comprising:
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acquiring not more than 4 satellites;
determining a satellite subset time for at least two subsets of the satellites acquired based on pseudorange information for the corresponding satellite subsets and based upon aiding information;
determining time from at least two of the satellite subset times. - View Dependent Claims (16)
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17. A method in a satellite positioning system receiver, the method comprising:
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acquiring a set of satellite positioning system satellites;
determining satellite subset times based on over-determined position solutions for at least two subsets of the satellites acquired;
determining whether any of the satellite subset times satisfies an accuracy requirement. - View Dependent Claims (18, 19, 20, 21)
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Specification