Airborne radar anti-forwarding type interference method based on adaptive beamforming

Abstract

The invention belongs to the technical field of airborne radar clutter and interference rejection, and particularly relates to an airborne radar anti-forwarding type interference method based on adaptive beamforming. The airborne radar anti-forwarding type interference method based on adaptive beamforming comprises the following steps that a receiving array of an airborne radar receives corresponding echo signals in the corresponding directions; according to the echo signals received by the airborne radar in all directions, corresponding constant false alarm detecting is carried out within the corresponding Doppler channel range in a Doppler clear area, and corresponding constant false alarm detecting results are obtained; the direction of arrival of the forwarding type interference signals are obtained according to the constant false alarm detecting results; the airspace guiding vectors of the forwarding type interference signals are obtained; the adaptive weight is worked out; interference rejection and clutter rejection are carried out on the echo signals received by the airborne radar in all directions according to the adaptive weight.

Description

technical field [0001] The invention belongs to the technical field of airborne radar clutter and interference suppression, in particular to an airborne radar anti-repeat interference method based on adaptive beamforming, which is used to fundamentally eliminate the influence of sidelobe retransmission interference on moving target detection. Background technique [0002] The forwarding spoofing jamming based on digital radio frequency memory stores the received radar signal, and then delays and phase modulates the signal as needed before forwarding it to the radar, generating a signal similar to the target echo for radar detection and tracking The system can generate speed deception jamming, distance deception jamming and wave position deception jamming, etc. The retransmission jamming signal has a high correlation with the radar signal, and it can obtain high gain through the radar matched filter. In addition, since the radar echo power of the real target is inversely prop...

AI Technical Summary

Problems solved by technology

The side lobe concealment technology can distinguish the target from the main lobe or the side lobe, and can counteract the forward interference coming from the side lobe to a certain extent, but the side lobe concealment and those who use the difference between the deceptive interference target and the real target to distinguish the two The method is the same as the method, but it does not fundamentally suppress the deception interference, and cannot overcome the influence of the deception interference on the constant false alarm rate detection threshold. In addition, the side lobe concealment technology cannot resist the main lobe interference.

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