False target interference identification method

Abstract

The invention discloses a false target interference identification method. The method comprises the following steps: storing pulse data subjected to pulse compression processing in a buffer area by taking a pulse repetition period as a unit; performing filtering processing on each pulse data in sequence in a slow time dimension to obtain a filtering result; performing first-order difference processing on the filtering results in sequence to obtain first-order difference results; sequentially carrying out local normalization processing on the first-order difference result by using root-mean-square values of filtering results of adjacent orientations of the same distance unit to obtain a local normalization signal; detecting a local normalized signal according to a preset detection threshold, and extracting envelope characteristics of the signal, the envelope characteristics including an ascending gradient, a descending gradient and peak flatness; and judging whether a false target interference signal exists in the pulse signal or not according to the envelope characteristics. The method not only can identify sidelobe false target interference, but also can identify main lobe and tail lobe false target interference, does not depend on jammer characteristics, and is simple in algorithm process and suitable for engineering application.

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, ...

AI Technical Summary

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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