Method and Apparatus for Determining the Location of a Mobile Object
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Accused Products
Abstract
The invention relates to a position-finding method for d4eterming the location of a mobile object. The features, for example received field strengths, of a plurality of base stations are measured, and the object position is located from these features, using a reference map. During an initialization process, a reference map is created which comprises a multiplicity of positions and the associated feature-dependent values. During use of the method, a plurality of position-finding processes are carried out, by means of each of which a measured feature-dependent value and from this, a located position of the object, are determined using the predetermined reference map. The predetermined reference map is in each case updated for at least some of the positions found, during which updates, the feature-dependent values are each corrected by a correction term at the support points of the reference map in a predetermined area surrounding an object position.
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Citations
46 Claims
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1-26. -26. (canceled)
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27. A method for a computer-aided localization of a mobile object aided by a feature-based position-fmding method where the features of a plurality of base stations are measured, and the position of the object is located from the features using a reference map, the feature of a base station characterizing a field emitted by the base station at the object or a field emitted by the object at the base station, comprising:
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predetermining, during initialization of the method, a reference map comprising a multiplicity of support points, which are each represented by a position and a feature-dependent value assigned to the position; carrying-out a plurality of position-finding processes during use of the method wherein a measured feature-dependent value and from the measured feature-dependent value a located position of the object are determined via the feature-based position-fmding method using the predetermined reference map; and carrying-out, in each case, for at least some of the locations, an update of the predetermined reference map where the feature-dependent values are each corrected by a correction term at the support points of the reference map in a predetermined area surrounding an object position, the correction term depending on the difference between the measured feature-dependent value for the respective location and the feature-dependent value at a support point in the predetermined surrounding area. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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Specification