Research on suppression of slicing jamming with digital array radar

Slicing jamming is a kind of un-continuous jamming formed based on dense repeater jamming principle. For the strongly slicing jamming received from antenna sidelobe, sidelobe blanking technique does not work while sidelobe cancellation is commonly used to suppress continuous wave jamming. General sampling method in radar resting period occurred sidelobe canceling failure, so it was crucial to choose an appropriate location of sampling window for jamming sampling. This new sampling method by comparing the correlation coefficients between the main channel and auxiliary channels in two-dimensional digital array radar succeed to get jamming samples, then adaptive cancellation weights can be calculated by sample matrix inversion. First slicing jamming model was established, then calculated correlation coefficients to choose appropriate location of sampling window for jamming sampling and make use of the adaptive sidelobe cancellation to suppress slicing jamming. Finally the simulation results showed that it can effectively reduce the jamming power after cancellation and obtain a better jamming cancellation ratio.