Method and apparatus for determining accuracy of the...

Details Method and apparatus for determining accuracy of the... Method and apparatus for determining accuracy of the...

2011-06-28

2011-06-28

Wachsman, Hal D (Department: 2857)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

C702S181000, C701S207000

Reexamination Certificate

active

07970575

ABSTRACT:
A method for determining the accuracy of the estimated position for a target device in a wireless system includes the computation of a confidence index. In the online location determining phase, after knowing the observations of the radio signal for a target device, the target device's probability distribution of location and its motion model are combined to calculate the position uncertainty, thereby giving the confidence index of this location estimate. The invention determines the location probability distribution, and calculates the uncertainty of the location probability distribution and the possible maximum uncertainty under the current situation. Based on these uncertainties, this invention determines the confidence index of the radio signal. The confidence may be regarded as a quantity that the location uncertainty can be excluded in the location prediction.

REFERENCES:
patent: 6249252 (2001-06-01), Dupray
patent: 2004/0067759 (2004-04-01), Spirito et al.
patent: 2005/0131635 (2005-06-01), Myllymaki et al.
patent: 2005/0243936 (2005-11-01), Agrawala et al.
patent: 2006/0276201 (2006-12-01), Dupray
patent: 2005/062606 (2005-07-01), None

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