Patent ID: 8330643

Claim:
A surveillance system for detecting a plurality of targets, the system comprising at least two radar antennae each of which is mounted on one of a plurality of blades of a windmill, and being configured to apply a compressive sensing technique when the blades do not rotate, the applied compressive sensing technique including: a step of reconstructing a cross-range image ρ at a certain distance (y 0 ) from the windmill blades, a measurement vector s including measurements performed by the radar antennae at slant ranges (r(u 1 ), r(u 2 ), r(u 3 )) corresponding to their respective distances to the cross-range image ρ, the cross-range image ρ being given by s=Eρ+z, where E is a measurement matrix and z corresponds to random disturbances, the measurement matrix E including a model of a radar echo s together with a geometry that determines the distances from the radar antennae to the cross-range image ρ.