Two-stage interacting multiple models filter for use in a global positioning system
First Claim
1. A method for determining a dynamical quantity of a receiver of signals conveying information useful in estimating the dynamical quantity, the method comprising the steps of:
- a) providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) providing a plurality of different motion models for modeling the motion of the receiver; and
c) providing a first value of the dynamical quantity formed by combining one or more filter solutions each based on a different one of the motion models, the combining based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution.
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Accused Products
Abstract
A method, corresponding apparatus and corresponding system for determining a dynamical quantity of a receiver of signals conveying information useful in estimating the dynamical quantity, the method including the steps of: providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined; providing a plurality of filter solutions (such as predictive filter solutions), and each assuming a different motion model for the receiver; and combining the plurality of filter solutions to provide a first value of the dynamical quantity based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution.
17 Citations
33 Claims
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1. A method for determining a dynamical quantity of a receiver of signals conveying information useful in estimating the dynamical quantity, the method comprising the steps of:
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a) providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) providing a plurality of different motion models for modeling the motion of the receiver; and
c) providing a first value of the dynamical quantity formed by combining one or more filter solutions each based on a different one of the motion models, the combining based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution. - View Dependent Claims (2, 3, 4, 5)
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6. An apparatus for determining a dynamical quantity of a receiver of signals conveying information useful in estimating the dynamical quantity, the apparatus comprising:
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a) means for providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) means for providing a plurality of different motion models for modeling the motion of the receiver; and
c) means for providing a first value of the dynamical quantity formed by combining one or more filter solutions each based on a different one of the motion models, the combining based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution. - View Dependent Claims (7, 8, 9, 10)
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11. A system for determining a dynamical quantity of a component receiver of signals conveying information useful in estimating the dynamical quantity, the system comprising:
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a receiver, including;
a) means for providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) means for providing a plurality of different motion models for modeling the motion of the receiver; and
c) means for providing a first value of the dynamical quantity formed by combining one or more filter solutions each based on a different one of the motion models, the combining based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for determining a dynamical quantity of a receiver of signals conveying information useful in estimating the dynamical quantity, the method comprising the steps of:
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a) providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) providing a plurality of filter solutions each assuming a different motion model for the receiver; and
c) combining the plurality of filter solutions to provide a first value of the dynamical quantity based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution. - View Dependent Claims (22, 23)
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24. An apparatus for determining a dynamical quantity of a host receiver of signals conveying information useful in estimating the dynamical quantity, the apparatus comprising:
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a) means for providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) means for providing a plurality of filter solutions each assuming a different motion model for the receiver; and
c) means for combining the plurality of filter solutions to provide a first value of the dynamical quantity based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution. - View Dependent Claims (25, 26)
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27. A system for determining a dynamical quantity of a component receiver of signals conveying information useful in estimating the dynamical quantity, the system comprising:
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a receiver, including;
a) means for providing a single-point solution, by solving for the dynamical quantity of the receiver using a single-point solution having as an input the information useful in estimating the dynamical quantity being determined;
b) means for providing a plurality of filter solutions each assuming a different motion model for the receiver; and
c) means for combining the plurality of filter solutions to provide a first value of the dynamical quantity based on weights that take into account the likelihood of the suitability of each motion model, with the likelihood determined on the basis of agreement of the first value of the dynamical quantity compared with a second value of the dynamical quantity as indicated by a single-point solution. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification