Efficient Time-frequency Domain Filter Design Against SAR Interference

Synthetic aperture radar (SAR) could be easily interfered with by a number of active jamming signals from enemy active jammers during its operating cycle, which seriously affects its battlefield information acquisition capability. In order to effectively combat multiple types of interference, this paper proposed an efficient time-frequency domain filtering method, which extracts the jamming-free pulses from received echo, and constructs an adaptive time-frequency domain filter by using its max time-frequency domain energy peaks, which could accurately extract and suppress interference. Simulation results demonstrate the significant suppression effect of the proposed method on the typical types of interference measured.