Method and apparatus for mitigating multipath effects at a satellite signal receiver using a sequential estimation filter
AssigneeGlobal Locate, Inc.
InventorsFrank van Diggelen, Charles Abraham, Sergei Podshivalvo
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Abstract
A method and apparatus for mitigating multipath effects in a satellite signal receiver is described. The method includes computing at least one pseudorange residual as a function of (i) a measured pseudorange to a given satellite, and (ii) an expected pseudorange to the given satellite, which is derived by mathematically projecting a pseudorange to the given satellite. The method also includes applying the measured pseudorange to a sequential-estimation filter, which is configured to solve a navigation-solution problem, when the pseudorange residual satisfies a given threshold.
Claims22
A method for mitigating multipath effects in a satellite-signal receiver, comprising:
- computing at least one pseudorange residual as a function of a measured pseudorange to a given satellite and an expected pseudorange to the given satellite, wherein the expected pseudorange is derived by mathematically projecting a pseudorange to the given satellite;
- and
- when the pseudorange residual satisfies a given threshold, applying the measured pseudorange to a sequential-estimation filter for solving a navigation-solution problem.
An apparatus for mitigating multipath effects in a satellite-signal receiver, comprising:
- memory operable to store executable instructions;
- and
- a processor operable to obtain from the memory the executable instruction and execute the executable instructions to:
- compute at least one pseudorange residual as a function of a measured pseudorange to a given satellite and an expected pseudorange to the given satellite, wherein the expected pseudorange is derived by mathematically projecting a pseudorange to the given satellite;
- and
- apply the measured pseudorange to a sequential-estimation filter for solving a navigation-solution problem when the pseudorange residual satisfies a given threshold.
A mobile device, comprising:
- a satellite signal receiver operable to process signals from at least one satellite to obtain a measured pseudorange;
- and
- a processor operable to compute at least one pseudorange residual as a function of a measured pseudorange to a given satellite and an expected pseudorange to the given satellite, wherein the expected pseudorange is derived by mathematically projecting a pseudorange to the given satellite;
- and to apply the measured pseudorange to a sequential-estimation filter for solving a navigation-solution problem when the pseudorange residual satisfies a given threshold.
Dependencies are inferred from the claim text.