SVM-based continuous wave Doppler radio fuse frequency-swept jamming prevention method

Abstract

The invention relates to an SVM-based continuous wave Doppler radio fuse frequency-swept jamming prevention method which comprises the following steps: step 1, acquiring a fuse detection signal, and performing fast Fourier transform on the sampled data; step 2, searching three maximum peak points of a Fourier amplitude spectrum; step 3, respectively solving the ratio of the amplitudes of the three maximum peak points; step 4, constructing a three-dimensional feature vector by using the Fourier amplitude spectrum peak value ratio so as to serve as an input training classifier of the SVM, thereby obtaining a classification decision function; and step 5, acquiring the features of the Fourier amplitude spectrum peak value ratio of an unknown fuse detection signal, inputting the features into the SVM, and classifying and identifying the signal by virtue of the classification decision function value. According to the method disclosed by the invention, the operating features of a frequency-swept jamming machine are fully utilized, the fuse detection signal under the actions of a target echo signal and a frequency-swept jamming signal can be accurately identified, and the frequency-swept jamming resistance of the fuse can be effectively improved.

Description

technical field [0001] The invention relates to an SVM-based continuous wave Doppler radio fuze anti-sweep interference method, which belongs to the technical field of radio fuzes. Background technique [0002] A fuze is a control device or system that uses environmental information and target information to detonate or ignite the warhead charge under predetermined conditions. As an important part of the weapon system, whether the fuze detection device can correctly identify various jamming signals and real target signals in a complex jamming environment is an important prerequisite for the fuze to maintain a high probability of timely activation and coordination efficiency. It is indispensable to ensure that the ammunition system has a high damage efficiency. Once the fuze is successfully interfered by the enemy's jamming system, it will affect the performance of the entire weapon system. Therefore, domestic and foreign fuze design attaches great importance to the research...

AI Technical Summary

Problems solved by technology

[0005] When the target can be regarded as a point target, the Doppler signal obtained by the fuze is a signal of a single frequency, but when the fuze actually works, it is often necessary to consider the body target effect. In this case, the target echo signal Doppler When the Le frequency is broadened, the waveform will be distorted to a certain extent, but the change of Doppler frequency still conforms to the law of Doppler effect

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