Airborne Radar Ground Moving Target Detection Method in Dense Transponder Jamming Environment

Abstract

The invention belongs to the technical field of aircraft radar clutter and interference rejection, and particularly relates to an aircraft radar ground moving target detection method under an intensive forwarding type interference environment. The aircraft radar ground moving target detection method under the intensive forwarding type interference environment comprises the following steps that a receiving array of an aircraft radar receives corresponding return signals in the corresponding direction, corresponding constant false-alarm detection is conducted in a Doppler channel range corresponding to a Doppler distinct area according to the return signals received in each direction of the aircraft radar, and corresponding constant false-alarm detection results are obtained; according to the constant false-alarm detection results, wave arriving directions of forwarded interference signals are obtained; then airspace guide vectors of the forwarded interference signals are obtained; according to the airspace guide vectors of the forwarded interference signals, the maximum likelihood estimation value of the ground moving target signal amplitude is obtained; a ground moving target is detected according to the maximum likelihood estimation value of the ground moving target signal amplitude.

Description

technical field [0001] The invention belongs to the technical field of airborne radar clutter and interference suppression, in particular to an airborne radar ground moving target detection method in a dense forwarding interference environment, which is used to fundamentally eliminate the influence of sidelobe forwarding interference on ground 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 r...

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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