Device for a mobile terminal for determining position by...

Details Device for a mobile terminal for determining position by... Device for a mobile terminal for determining position by...

2005-11-29

2005-11-29

Camby, Richard M. (Department: 3661)

Data processing: vehicles, navigation, and relative location

Navigation

Employing position determining equipment

C701S213000, C701S214000, C342S357490, C342S357490, C342S357490, C342S357490

Reexamination Certificate

active

06970785

ABSTRACT:
A position determination device for a mobile terminal acquires pseudorandom codes and navigation data contained in received signals and associated augmentation data representative of an instantaneous approximate position of the terminal and an associated radius of protection contained in received messages. In the presence of a radius of protection corresponding to a quality level lower than a chosen quality level or in the momentary absence of a radius of protection associated with an approximate position at a time T, an estimated radius of protection is determined as a function of a weighting law applied to a chosen number of earlier radii of protection. An estimated position of the terminal at the time T is then determined as a function of at least the estimated radius of protection and the pseudorandom codes, navigation data and approximate position acquired at the time T.

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patent: 6466846 (2002-10-01), Maynard
patent: 6677894 (2004-01-01), Sheynblat et al.

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