Enhanced location methodology for a location system

G - Physics – 01 – S

Patent

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G01S 3/02 (2006.01) G01S 1/24 (2006.01) G01S 5/12 (2006.01)

Patent

CA 2452108

A first device (100) transmits a first signal to a second device (300) at a first time. A third device (110) detects a second signal from the second device (300) at a second time. The second signal was transmitted in response to detection of the first signal. Based on the first and second times, a sum of a first propagation delay (200) and a second propagation delay (210) is estimated. The first propagation delay (200) is between the first device (100) and the second device (300), and the second propagation delay (210) is between the second device (300) and the third device (110). The sum of the first and second propagation delays (200, 210) is then used to estimate a location of the second device (300).

L'invention concerne un premier dispositif (100) qui émet un premier signal à un deuxième dispositif (300) à un premier moment. Un troisième dispositif (110) détecte un second signal provenant du deuxième dispositif (300) à un second moment. Le second signal a été émis en réponse à la détection du premier signal. Sur la base du premier et du second moments, on fait une estimation de la somme d'un premier temps de propagation (200) et d'un second temps de propagation (210). Le premier temps de propagation se situe entre le premier dispositif (100) et le deuxième dispositif (300), et le second temps de propagation (210), entre le deuxième dispositif (300) et le troisième dispositif (110). La somme des premier et second temps de propagation (200, 210) sert alors à faire une estimation d'une localisation du deuxième dispositif (300).

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