SAR (synthetic aperture radar) deception jamming generation method and system based on one-bit sampling

Abstract

The invention discloses an SAR (synthetic aperture radar) deception jamming generation method and system based on one-bit sampling; the method comprises: acquiring SAR transmitted signal, comparing the signal with a preset threshold, and generating a one-bit sampling sequence according to the comparison results; acquiring an instantaneous slope distance difference between scattering coefficients of a plurality of false points to be generated, quantizing the difference into a discrete instantaneous slope distance difference unit, and acquiring a one-dimensional distance image according to the instantaneous slope distance difference unit; subjecting the one-bit sampling sequence and the one-dimensional distance image to convolution operation to generate a deception jamming vector; generating a one-bit sequence according to the results of pointwise comparison of the deception jamming vector with a pre-generated noise threshold; amplifying the one-bit sequence, and forwarding to the SAR to be jammed; repeating the above steps in different pulse repeat intervals to generate a focused deception jamming target. Calculation amount and calculation complexity are greatly decreased for deception jamming convolution modulation, the cost of an SAR deception jammer is reduced, and deception jamming effect is good.

Description

technical field [0001] The present invention relates to the technical field of signal processing, in particular to a method and system for generating SAR spoofing jamming based on one-bit sampling. Background technique [0002] The SAR deception jammer performs delay and phase modulation on the intercepted SAR signal according to the pre-designed false scenario, which requires lower power and greater harm than the traditional suppression jamming. Among them, SAR is the abbreviation of Synthetic ApertureRadar, and the Chinese translation is Synthetic Aperture Radar. The jammer generates realistic false targets in real scenes, thus disrupting the information acquisition and decision-making of SAR. Therefore, the research on SAR deception jamming has attracted extensive attention of scholars. However, with the increase of false scenes, the computational complexity and computing time required to generate spoofing jamming also increase, which not only puts forward higher require...

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Problems solved by technology

[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a method and system for generating SAR spoofing interference based on one-bit sampling, aiming to solve the spoofing interference modulation method in the prior art. , the modulation system is complex and the amount of calculation is large, which increases the cost of the SAR deception jammer and brings a lot of inconvenient technical problems for the deception jamming modulation

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