Radar active interference signal parameter extraction and interference pattern recognition method and device

Abstract

The invention relates to a radar active interference signal parameter extraction and interference pattern recognition method and device and belongs to the technical field of signal processing. The method of combining broadband frequency domain processing and narrowband time domain processing is adopted, signals are accurately detected in real time by adopting a double-threshold signal detection algorithm, the method is advantaged in that signal bandwidth and frequency estimation precision is improved, pulse pressure data deviation rate calculation and peak value correction are carried out, pulse pressure peak value determination accuracy is improved, interference signal identification accuracy is substantially improved, the method is simple and convenient in application realization mode and strong in practicality, and simultaneous different-frequency multi-interference identification capability is realized.

Description

Technical field [0001] The present invention relates to the technical field of signal processing, in particular to the technical field of radar, and specifically to a method and device for extracting radar active interference signal parameters and identifying interference patterns. Background technique [0002] Radar interference refers to changing the echo signal parameters, disturbing the radar's detection and tracking targets, and then affecting the correct judgment of the radar. It mainly includes active interference and passive interference. [0003] According to the result of interference affecting the real target signal, radar active interference can be divided into suppressive interference, deceptive interference, and combined interference of the two. Suppressive interference refers to interference whose interference energy is much larger than the useful signal. Since the radar receiver detects the target based on the pulse pressure result, the suppressed interference will ...

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Problems solved by technology

Radar is no longer faced with a single type of electronic interference, but usually multiple different types of interference, or even compound interference, generated by multiple interference sources. These interferences are distributed in a wide frequency band, with flexible parameters and interference Variety of styles poses a serious threat to radar

Although there have been many studies on the identification technology of radar interference in recent years, most of them can only be applied to the laboratory environment, and the identification effect is poor in the actual electromagnetic environment. Therefore, there is still a lack of effective identification methods for radar interference signals. There is also little research on the multi-interference identification of

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