Location Fix From Unknown Position
First Claim
1. An apparatus for determining a location of a receiver by means of signals received by the receiver from a plurality of satellites, the apparatus being configured to:
- when the receiver has been unable to decode a time-of-transmission from the satellite signals, determine a location for the receiver by means of an algorithm that takes an estimate of the location of the receiver as an input; and
when an estimate of the location of the receiver is unavailable, determine an approximate location of the receiver in dependence on the satellite signals and input that approximate location into the algorithm as the estimate of the location of the receiver.
2 Assignments
0 Petitions
Accused Products
Abstract
An apparatus for determining a location of a receiver by using signals received by the receiver from a number of satellites, the apparatus being configured to, when the receiver has been unable to decode a time-of-transmission from the satellite signals, determine a location for the receiver by use of an algorithm that takes an estimate of the location of the receiver as an input, and, when an estimate of the location of the receiver is unavailable, determine an approximate location of the receiver in dependence on the satellite signals and input that approximate location into the algorithm as the estimate of the location of the receiver.
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Citations
23 Claims
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1. An apparatus for determining a location of a receiver by means of signals received by the receiver from a plurality of satellites, the apparatus being configured to:
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when the receiver has been unable to decode a time-of-transmission from the satellite signals, determine a location for the receiver by means of an algorithm that takes an estimate of the location of the receiver as an input; and when an estimate of the location of the receiver is unavailable, determine an approximate location of the receiver in dependence on the satellite signals and input that approximate location into the algorithm as the estimate of the location of the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A method for determining a location of a receiver when the receiver has been unable to decode a time-of-transmission from signals received by the receiver from a plurality of satellites and an estimate of the location of the receiver is unavailable, the method comprising:
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determining an approximate location of the receiver in dependence on the satellite signals; and inputting that approximate location into an algorithm, which is capable of determining a location for the receiver when the receiver has been unable to decode a time-of-transmission from the satellite signals, as an estimate of the location of the receiver.
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20. A computer-readable medium encoded with instructions, that when executed by an apparatus for determining a location of a receiver by means of signals received by the receiver from a plurality of satellites, cause the apparatus to:
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when the receiver has been unable to decode a time-of-transmission from the satellite signals, determine a location for the receiver by means of an algorithm that takes an estimate of the location of the receiver as an input; and when an estimate of the location of the receiver is unavailable, determine an approximate location of the receiver in dependence on the satellite signals and input that approximate location into the algorithm as the estimate of the location of the receiver.
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21. An apparatus configured to determine a region of the Earth'"'"'s surface within which a receiver is located by:
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identifying a plurality of satellites from which that receiver is receiving signals; and determining a region of the Earth'"'"'s surface from which it is possible to simultaneously receive signals from the plurality of satellites.
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22. A method for determining a region of the Earth'"'"'s surface within which a receiver is located comprising:
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identifying a plurality of satellites from which that receiver is receiving signals; and determining a region of the Earth'"'"'s surface from which it is possible to simultaneously receive signals from the plurality of satellites.
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23. A computer-readable medium encoded with instructions, that when executed by an apparatus configured to determine a region of the Earth'"'"'s surface within which a receiver is located, cause the apparatus to:
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Identify a plurality of satellites from which that receiver is receiving signals; and determine a region of the Earth'"'"'s surface from which it is possible to simultaneously receive signals from the plurality of satellites.
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Specification