A False Target Interference Recognition Method

Abstract

The invention discloses a false target interference identification method, which includes storing the pulse data processed by pulse compression in a buffer in the unit of pulse repetition period; performing filtering processing on each pulse data in the slow time dimension to obtain the filtering result ; Perform first-order difference processing on the filtering results in turn to obtain the first-order difference results; sequentially perform local normalization processing on the first-order difference results with the root mean square value of the filtering results of the adjacent orientations of the same distance unit to obtain local normalization Signal; detect locally normalized signals according to the preset detection threshold, and extract the envelope features of the signal, the envelope features include rising gradient, falling gradient and peak flatness; judge whether there is a false target interference signal in the pulse signal according to the envelope features . Using the aforementioned method can not only identify sidelobe false target interference, but also identify main lobe and tail lobe false target interference, and does not depend on the characteristics of the jammer, and the algorithm flow is simple, which is suitable for engineering applications.

Description

technical field [0001] The invention relates to the field of radar signals, in particular to a false target interference identification method. Background technique [0002] With the development of radar electronic countermeasure technology, the working environment of radar is becoming increasingly complex. Unlike previous radars that mainly faced passive interference such as meteorological clutter and ground clutter, the working environment of modern radars is usually full of various active and passive interferences. Therefore, it is urgent to study effective interference identification and countermeasure methods to improve the detection performance of radar in modern complex electromagnetic environments. Deceptive jamming, also known as false target jamming, is a common jamming in radar electronic countermeasures, and it is one of the most threatening active jamming that radars face today. Usually, in order to ensure the effectiveness of the false target jamming signal, ...

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Problems solved by technology

[0005] The present invention provides a false target interference identification method to solve the existing false target interference identification method. Since the digital-to-analog conversion device of the jammer has higher speed and precision, and the bandwidth is higher, the false target interference identification method is more difficult. big problem

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