A method and system for generating SAR spoofing interference based on one-bit sampling

Abstract

The invention discloses a method and system for generating SAR spoofing interference based on one-bit sampling. The method includes: obtaining a signal transmitted by SAR and comparing it with a predetermined threshold, and generating a one-bit sampling sequence according to the comparison result; obtaining several false points to be generated The instantaneous slant range difference of the scattering coefficient is quantified into discrete instantaneous slant range difference units, and the one-dimensional range image is obtained according to the instantaneous slant range difference unit; the one-bit sampling sequence is convolved with the one-dimensional range image to generate a deception interference vector; Generate a bit sequence according to the point-by-point comparison of the deceptive interference vector and the pre-generated noise threshold; amplify the bit sequence and forward it to the SAR that needs to be interfered; repeat the above steps in different pulse repetition intervals, Creates a focused deception that interferes with the target. The invention greatly reduces the calculation amount and operation complexity of the deception jamming convolution modulation, reduces the cost of the SAR deception jamming machine, and has good deception jamming effect.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a method and system for generating SAR deception interference based on one-bit sampling. Background technique [0002] The SAR spoofing jammer performs delay and phase modulation on the intercepted SAR signal according to the pre-designed false scene, which requires less power than the traditional suppression of jamming and is more harmful. Among them, SAR is the abbreviation of Synthetic ApertureRadar, and the Chinese translation is synthetic aperture radar. The jammer produces realistic false targets in the real scene, thereby disrupting the information acquisition and decision-making of SAR. Therefore, the research on SAR deception jamming has attracted widespread attention of scholars. However, with the increase of false scenes, the computational complexity and computing time required to generate deception jamming also increase, which not only puts forward higher r...

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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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