METHOD FOR CLEANING SIGNALS FOR CENTRALISED ANTIJAMMING

摘要

The invention relates to a method for cleaning signals for centralised antijamming. The invention provides as many cleaned antenna paths as sub-networks with limited calculation requirements. The method comprises two steps. Firstly, an antijamming matrix (M) is calculated. The matrix depends on the noise co-variance matrix (G), on a weighing vector (w<SUB>r</SUB>) representing the shape of the desired antenna pattern at the reception in a non-jammed environment, and on restrictions (C, f) for preserving the shape of the antenna pattern. Secondly, the signals (x<SUB>i</SUB>) from the antenna sub-networks undergo a linear recombination carried out by the antijamming matrix (M). The antijamming method is called centralised because the data necessary for the antijamming processing are concentrated in the sole antijamming matrix (M). The invention is particularly useful for radar systems, in particular for airborne radar systems.