Polarization detection and recognition method and device for terrain rebound interference

Abstract

The invention relates to the technical field of radar signal processing and radar electronic countermeasures, and discloses a polarization detection and recognition method and device for terrain rebound interference. The device used in the method is positioned on an airborne radar and comprises a transmitter, a dual-channel receiver, an internal processor and a circulator, the internal processor is respectively connected with the transmitter and the dual-channel receiver through cables, the dual-channel receiver comprises a horizontal polarization receiver and a vertical polarization receiver, the horizontal polarization receiver is connected with a horizontal polarization antenna through a cable, and the vertical polarization receiver is connected with a vertical polarization antenna through a cable. Whether interference signals transmitted by a jammer are present or not can be detected and determined, and the interference signals generated by terrain rebound can be recognized when interference is judged. The method is applicable to various devices for detection, recognition and angle tracking by the aid of radar signals, the types of the interference signals are rapidly recognized, the interference recognition capacity of a system is improved, and interference is effectively eliminated.

Description

technical field [0001] The invention relates to the technical fields of radar signal processing and radar electronic countermeasures, in particular to a polarization detection and identification method and device for terrain bounce interference. Background technique [0002] At present, most unmanned aerial vehicles generally use radar, also known as airborne radar, to detect air or ground targets. In order to prevent the effective detection of unmanned aerial vehicles, the defenders, such as aircraft, will carry jammers, release noise to suppress jamming or spoof jamming, so that the airborne radar will generate wrong angle and distance measurement information. For this reason, airborne radar generally adopts the tracking interference source (HOJ) technology, which uses the interference signal emitted by the target as the signal source, and passively receives the interference signal, so as to realize passive passive angle tracking and accurate measurement. According to the...

AI Technical Summary

Problems solved by technology

Both the terrain bounce interference and the real target echo can enter the airborne radar antenna, but the spatial angles are different, so that there are two angle tracking signals in the radar field of view, forcing the radar tracking angle to be not the actual target angle, forming an angle deceptive distraction effect

The tracking jamming source (HOJ) cannot identify the terrain bounce jamming, which makes the terrain bounce jamming effect remarkable. At present, no effective radar electronic anti-jamming measures and devices have been reported, which can detect and identify the terrain bounce jamming

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