Resolving Transmit Time Uncertainty in Carrier Phase Relative Positioning
First Claim
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1. A method for use with a device having an SPS receiver, the method comprising:
- determining a current chip number associated with a spread-spectrum sequence in at least one received Satellite Positioning System (SPS) signal transmitted by at least one space vehicle (SV);
determining a fraction of a chip associated with at least one carrier signal phase measurement sample; and
determining at least one SV transmit time based, at least in part on a local receiver time, said current chip number, and said fraction of said chip.
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Abstract
Methods and apparatus are provided for use in electronic devices to perform carrier phase relative positioning processing.
14 Citations
43 Claims
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1. A method for use with a device having an SPS receiver, the method comprising:
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determining a current chip number associated with a spread-spectrum sequence in at least one received Satellite Positioning System (SPS) signal transmitted by at least one space vehicle (SV); determining a fraction of a chip associated with at least one carrier signal phase measurement sample; and determining at least one SV transmit time based, at least in part on a local receiver time, said current chip number, and said fraction of said chip. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus comprising:
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means for determining a current chip number associated with a spread-spectrum sequence in at least one received Satellite Positioning System (SPS) signal transmitted by at least one space vehicle (SV); means for determining a fraction of a chip associated with at least one carrier signal phase measurement sample; and means for determining at least one SV transmit time based, at least in part on a local receiver time, said current chip number, and said fraction of said chip. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. An article comprising:
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a computer readable medium having stored thereon computer implementable instructions that if implemented by one or more processing units operatively enable the one or more processing unit to; determine a current chip number associated with a spread-spectrum sequence in at least one received Satellite Positioning System (SPS) signal transmitted by at least one space vehicle (SV); determine a fraction of a chip associated with at least one carrier signal phase measurement sample; and determine at least one SV transmit time based, at least in part on a local receiver time, said current chip number, and said fraction of said chip. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. An apparatus comprising:
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a receiver operatively enabled to acquire at least one SPS signal associated with a spread-spectrum sequence as transmitted using a carrier signal by at least one space vehicle (SV); and at least one processing unit operatively coupled to said receiver, and operatively enabled to; determine a current chip number associated with said spread-spectrum sequence; determine a fraction of a chip associated with at least one carrier signal phase measurement sample; and determine at least one SV transmit time based, at least in part on a local receiver time, said current chip number, and said fraction of said chip. - View Dependent Claims (35, 36, 37, 38, 39, 40, 41, 42, 43)
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Specification