Passive Covert Radars using CP-OFDM signals. A new efficient method to extract targets echoes

Passive Coherent Location (PCL) systems use the signal transmitted by so called illuminators-of-opportunity in the environment to illuminates the targets. With CP-OFDM transmissions, it is quite easy to recover the original data and then to reconstruct the original transmission. The main difficulty is to extract, from the mixture received on the sensors, only the targets echoes. A new efficient and low complexity method is exposed here. Results on both simulated and real data are presented.