Radar radiation source feature extraction and classification method based on variational mode decomposition

Abstract

The invention discloses a radar radiation source feature extraction and classification method based on variational mode decomposition, and the method comprises the steps of firstly, receiving a high-frequency pulse signal of a radar, carrying out the preprocessing of the high-frequency pulse signal, and obtaining a preprocessing signal; utilizing the digital channelization processing to generate apulse description word parameter of the pre-processed signal, and extracting an arrival angle and a pulse width in the pulse description word parameter; preprocessing the central frequency intra-pulse characteristics of the signals through a variational mode decomposition method, taking the central frequency intra-pulse characteristics as the supplement of conventional parameters, forming the characteristic parameters of a radar radiation source, and finally adopting a fuzzy-C means method to sort the radar radiation sources. The method can be used for classifying the frequency modulation type radar radiation sources, has the very good noise suppression capability, and can effectively improve the classification effect of the radar radiation sources under the low signal-to-noise ratio.

Description

technical field [0001] The invention relates to the field of radar technology, in particular to a radar radiation source feature extraction and classification method based on variational mode decomposition in the field of electronic countermeasures, which is suitable for the classification of radar radiation sources under the condition of low signal-to-noise ratio. Background technique [0002] Radar radiation source identification is an important part of the electronic reconnaissance system. By intercepting, sorting, identifying and locating enemy radar radiation sources, it provides battlefield information and intelligence for one's own military operations, and radar reconnaissance obtains enemy intelligence. The quantity and quality of the battle will determine the direction of the battle. [0003] In order to ensure that the radar reconnaissance equipment has a high probability of intercepting the enemy's radiation source signal, the frequency domain wide open receiving ...

AI Technical Summary

Problems solved by technology

However, in today's electromagnetic environment, the density of electromagnetic signals is high, and the complex system is changeable. The defects of this method are becoming more and more obvious.

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