Patent ID: 7570194
Filing Date: 2009-08-04
Classification: G01S

Abstract:
1. A system for locating and identifying cooperating mobiles carrying a transponder of a secondary surveillance radar (SSR) apt to emit an SSR signal, the system comprising: a plurality of measuring stations; one or more reference transponders, installed in known positions, for performing time synchronization of the measuring stations with respect to an assigned measuring station used as a temporal reference station, so producing a single temporal reference for the system, on the basis of a difference between a time of arrival of a signal from the transponder to the assigned measurement station and a time of arrival to the station to be synchronized; and a processing subsystem, wherein each measuring station comprises a processing section for processing an SSR signal emitted by a mobile, said SSR signal comprising a preamble including a sequence of pulses, so to obtain a measure of the time of arrival referred to a clock of said station, said processing section being configured to: wherein said processing subsystem collects data related to said measured time of arrival and reconstructs position and identity of the mobiles.