Method for the location of mobile terminals, related systems and terminal, computer program products thereof
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Accused Products
Abstract
A method for determining the location coordinates of a mobile terminal with respect to reference elements adapted to send toward the mobile terminal radioelectric signals involves the steps of measuring the radioelectric signals to derive respective measurements, the measurements being affected by measurement errors, and subjecting the measurements to state-based statistical filtering, such as, a Kalman filtering, to derive therefrom the location coordinates of the mobile terminal. At least some of the reference elements are terrestrial reference elements and in the statistical filtering at least one further state is included in addition to the coordinates. The further state is representative of the measurement errors. The terminal is adapted to be mounted on a vehicle, such as, a motorcar, and to have associated therewith a measurement source, such as, an altimeter adapted to provide additional measurements indicative of the location, e.g., the altitude, and/or the displacement of the mobile terminal.
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Citations
52 Claims
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1-26. -26. (canceled)
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27. A method for determining the location coordinates of a mobile terminal with respect to a set of reference elements adapted to send toward said mobile terminal radioelectric signals, comprising the steps of:
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measuring said radioelectric signals to derive respective measurements, said measurements being affected by measurement errors;
subjecting such measurements to state-based statistical filtering to derive therefrom said location coordinates;
selecting at least part of said set reference elements as terrestrial reference elements; and
providing in said statistical filtering at least one further state in addition to said coordinates, said at least one further state being representative of said measurement errors. - View Dependent Claims (28, 29, 30, 31, 32, 33, 51)
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34. A method for determining the location coordinates of a mobile terminal with respect to a set of reference elements adapted to send toward said mobile terminal radioelectric signals, comprising the steps of:
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including in said set of reference elements both terrestrial reference elements and at least one satellite of a satellite-based positioning system;
measuring said radioelectric signals to derive respective measurements, said measurements being affected by measurement errors;
subjecting said measurements to state-based statistical filtering to derive therefrom said location coordinates; and
associating with said respective measurements at least one additional measurement indicative of at least one of the location and displacement of said mobile terminal.
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35. A system for determining the location coordinates of a mobile terminal with respect to a set of reference elements adapted to send toward said mobile terminal radioelectric signals comprising:
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at least one measuring module for measuring said radioelectric signals and deriving respective measurements, said measurements being affected by measurement errors; and
at least one processing module adapted for subjecting such measurements to state-based statistical filtering to derive therefrom said location coordinates, at least a part of said set of reference elements being terrestrial reference elements, and said at least one processing module being configured for including in said statistical filtering at least one further state in addition to said coordinates, said at least one further state being representative of said measurement errors. - View Dependent Claims (36, 37, 38, 39, 40, 41, 42)
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43. A system for determining the location coordinates of a mobile terminal with respect to a set of reference elements adapted to send toward said mobile terminal radioelectric signals, comprising:
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both a set of terrestrial reference elements and at least one satellite of a satellite-based positioning system as said reference elements;
at least one measuring module for measuring said radioelectric signals to derive respective measurements, said measurements being affected by measurement errors;
at least one processing module for subjecting said measurements to state-based statistical filtering to derive therefrom said location coordinates; and
at least one measurement source providing at least one additional measurement to be associated with said respective measurements, said at least one additional measurement being indicative of at least one of the location and displacement of said mobile terminal.
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44. A mobile terminal configured for determining its location coordinates with respect to a set of reference elements adapted to send toward said mobile terminal radioelectric signals, comprising:
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a measuring module for measuring said radioelectric signals and deriving respective measurements, said measurements being affected by measurement errors; and
a processing module adapted for subjecting such measurements to state-based statistical filtering to derive therefrom said location coordinates, the terminal comprising together with at least part of said set of reference elements, a terrestrial communication system, and said processing module being configured for including in said statistical filtering at least one further state in addition to said coordinates, said at least one further state being representative of said measurement errors. - View Dependent Claims (45, 46, 47, 48, 49, 52)
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50. A mobile terminal configured for determining its location coordinates with respect to a set of reference elements adapted to send toward said mobile terminal radioelectric signals, said set of reference elements including both terrestrial reference elements and at least one satellite of a satellite-based positioning system comprising:
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a measuring module for measuring said radioelectric signals to derive respective measurements, said measurements being affected by measurement errors;
a processing module for subjecting said measurements to state-based statistical filtering to derive therefrom said location coordinates; and
at least one measurement source associated to the mobile terminal and providing at least one additional measurement to be associated with said measurements, said at least one additional measurement being indicative of at least one of the location and displacement of said mobile terminal.
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Specification