Patent ID: 9134410
Filing Date: 2015-09-15
Classification: G01S

Abstract:
1. A method implemented in a mobile system comprising a radar for detecting, in a scene, at least one target reflector of a first predetermined type, called target type, that may be concealed by at least one high-energy reflector of a second type, called strong type, said method comprising: a step for identifying a zone of a distance-radial velocity space that includes high-energy reflectors configured to conceal the target reflectors; a step for modeling an order two phase shift over time, due to the Doppler effect, of theoretical reflectors of said target type and theoretical reflectors of said strong type, the modeling using a kinematic signature of said theoretical reflectors; a step for creating a filter for at least one distance and one radial velocity given by: said phase shifts being obtained from the aforementioned step for modeling, said filter being designed to attenuate, by projection, the energy of the high-energy reflectors of said scene and increase, by correlation, the energy of said at least one target reflector of the scene at the given distance and for the given radial velocity; a step for illuminating the scene, by controlling the radar, and acquiring raw radar data from echoes reflected by the reflectors of the scene; a step for obtaining distance profiles obtained by processing raw radar data to separate the reflectors of the scene in terms of distance, said profiles being collected over a long enough time for the distance variation of a reflector of the scene to be able to be considered quadratic relative to the time; a step for applying filters on said distance profiles, this step leading to a separation of the reflectors of the scene in velocity; and a step for detecting the target reflectors among the high-energy reflectors.