Sar spoofing jamming method and system based on multi-receiver equidistant right-angle distribution

Abstract

The invention discloses a SAR deception jamming method and system based on equidistant right-angle distribution of multiple receivers. The method includes: multiple receivers and jammers form equidistant right-angle distribution to form a networked deception jamming system, and obtain the position of the receivers Coordinate construction coefficient matrix; the jammer and multiple receivers intercept radar signals separately, calculate the distance difference between the signal arrival at each receiver and the signal arrival at the jammer, and construct the observation vector; solve the modulation coefficient according to the coefficient matrix and observation vector, and calculate the distance of the interference point Instantaneous slant distance difference: use the instantaneous slant distance difference to perform signal amplitude and phase modulation to generate a deception jamming signal, and forward the deception jamming signal. The present invention adopts the method of multi-receiver equidistant and right-angle expansion layout, and under the condition that there is a large error in the detection parameters, the optimal expansion layout of 2N receivers is set according to the size of the error, so that the error is reduced to 1 / 2N of the original, and the improvement is improved. Spoof the precision of jamming modulation to get higher quality jamming images.

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 simulates radar echoes or echo forwarding through jamming modulation. Interference 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 purpose...

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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