The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 16, 1996
Filed:
Mar. 28, 1995
Alain Appriou, Orsay, FR;
Office National D'Etudes Et De Recherches Aerospatiales, Chatillon Cedex, FR;
Abstract
The tracking of moving objects on land, in the air or at sea is effected by means of one or more sensors (S.sub.j.sup.1). The observation space of each sensor is divided into resolution cells (X.sup.1h) forming a grid. The sensors of the same grid are grouped together. A probability estimate (.beta.k) for a moving object being in a cell (Xk) which is an intersection of the resolution cells (X.sup.1h) is produced. For this purpose, the starting points are signals (M.sub.j.sup.1h) delivered by the sensors (S.sub.j.sup.1) and previously selected according to windowing criteria, sets of pairs (F.sub.i (M.sub.j.sup.1h)D.sub.ij.sup.1h) stored in memories (1) and coming from a prior supervised statistical learning, and tracking coefficients (.alpha.k) delivered by an adaptive tracking filter (4) of the PDAF type. After application of this probability (.beta.k) to the adaptive tracking filter (4), there is obtained on the one hand an estimated status (X*,P*) affording a trajectory prediction (x,S) for at least one moving object and, on the other hand, the windowing criterion is adjusted.