A sea corner-reflector jamming identification method based on time-frequency feature

Micro-motion characteristics of the sea corner-reflector jamming and the ship are different. The corresponding time-frequency feature extracted from the time-frequency representation (TFR) of the target echo can be used to discriminate the corner-reflector jamming and the ship. Three parameters, including the micro motion period, the time-frequency spectrum entropy and the maximum of micro-Doppler half-period frequency difference, are applied to describe time-frequency feature of the target. An identification method based on those time-frequency feature parameters is presented to discriminate the corner-reflector jamming and the ship. Experiments with measured data validate the effectiveness of the identification method via time-frequency feature.