Main‐lobe jamming cancellation for multi‐static radar by joint range‐Doppler processing

It is well‐known that the noise jamming impedes the mission effectiveness of radar systems. It raises the level of the background and swamps out target returns. Techniques to suppress jamming and improve the performance of radar systems are continuously being developed. Here, a jammer being close to a target or even equivalent to it in direction, colloquially referred to as mainlobe jamming is considered. A mainlobe jamming cancellation technique based on multi‐static radar systems (MSRSs) is developed. In a MSRS, a jammer will produce different time delays and relative speeds to the diverse radar receivers located at separated positions. Here, the method to simultaneously estimate the shifts of time delay and Doppler frequency in the range‐Doppler plane (RDP) is proposed. Furthermore, the jamming cancellation is adaptively performed in the range‐Doppler domain. The simulation results show the validity of the proposed method.