Multi-receiver equidistant rectangular distribution-based SAR deception jamming method and system

Abstract

The invention discloses a multi-receiver equidistant rectangular distribution-based SAR deception jamming method and system. The method includes the following steps that: a plurality of receivers and a jammer are in equidistant rectangular distribution, so as form a networking deception jamming system, and the position coordinates of the receivers are obtained to construct a coefficient matrix; the jammer and the plurality of receivers respectively intercept radar signals, and the difference of a distance by which the signals arrive at the receivers and a distance by which the signals arrive at the jammer is calculated, and an observation vector is constructed; a modulation coefficient is solved according to the coefficient matrix and the observation vector, the instantaneous slant range difference of interference points is calculated; and the instantaneous slant range difference is utilized to carry out signal amplitude and phase modulation, so that deception jamming signals are generated, and the deception jamming signals are forwarded. According to the method, the plurality of receivers are in equidistant rectangular expansion layout, and when a large error exists in investigation parameters, the optimal expansion layout of 2N receivers is set according to the magnitude of the error, so that the magnitude of the error can be decreased to 1 / 2N of that of the original error, and therefore, the precision of deception jamming modulation can be improved, and an interference image with higher quality can be obtained.

Description

technical field [0001] The invention relates to the technical field of signal processing, in particular to a SAR deception jamming method and system based on equidistant right-angle distribution of multiple receivers. Background technique [0002] Synthetic Aperture Radar (hereinafter referred to as SAR) deception jamming detects key parameters such as the center frequency, modulation frequency, and bandwidth of the enemy's SAR signal, and jams the SAR system by jamming, modulating, simulating radar echoes or echo forwarding. , has the advantages of strong flexibility, low interference power, and high fidelity. SAR spoofing jamming makes the false jamming signal and the real echo signal received by the enemy SAR system superimpose each other, and the real target and the set false target are mixed in the imaging result, so as to achieve the imaging effect of "disgusting the real" and realize the protection of the real target, Misleading the enemy's decision-making and other ...

AI Technical Summary

Problems solved by technology

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a SAR deception jamming method and system based on multi-receiver equidistant right-angle distribution, aiming to solve the problem that positioning errors have a relatively large impact on deception jamming results when there are parameter detection errors in the prior art. Large, inability to obtain accurate interference results defects

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