Patent ID: 7649806
Filing Date: 2010-01-19
Classification: G01S

Abstract:
1. A method for detecting a source of signal from the signal received by a detector said received signal being in the form of a data stream y(t, ω) dependent on a discrete time variable t and an observation variable ω, relative to the source, said source being characterized by a state model x(t) with values determined among a finite set {x 1 , . . . , x N } of N values, to which there corresponds a finite set {ω 1 , . . . , ω N } of N values of said observation variable ω, said method producing for each instant t a detection information d(t, x n ), pointing out for each value x n of the state model X(t) if a source was detected, said detection information being produced by calculating for each instant t and for each value x n of the state model a value of a detection criterion Λ n (t) and comparing this value to a predetermined detection threshold, the detection information d(t, x n ) pointing out that a source was detected by a value x n when the values of Λ n (t) calculated for this value x n exceeds the threshold; said method comprising the following steps: a first step wherein, for each instant t the calculation of Λ a first operation calculating Λ a second operation calculating Λ the larger of the two calculated values of Λ n (t) being retained as being the value the criterion Λ n (t); a second step wherein the retained value of Λ