Anti-deceptive jamming method for multi-base SAR

Abstract

The invention discloses an anti-deceptive jamming method for a multi-base SAR. The anti-deceptive jamming method comprises the following steps: S1, establishing an echo model in a multi-jammer environment; S2, carrying out false target detection and discrimination: detecting an interested target in each SAR image by using a visual saliency detection method based on a spectral residual error to obtain a geometric center position of the interested target, and successively discriminating whether the interested target is a false target by using a discrimination method based on an Euclidean distance; and S3, carrying out positioning and suppression of jammers: combining the corresponding relationship between the false target and the jammers, solving by using the multi-base distance and the established equation set to obtain the specific position of each group of jammers, and then finding the combination with the correct positions of the jammers by using an LCMV interference suppression algorithm to realize interference suppression. According to the method, deceptive interference in the multi-base SAR imaging system can be effectively suppressed, the readability of the multi-base SAR image is improved, so that the imaging image identification degree of the multi-base SAR system is improved, and accurate imaging of the multi-base SAR is realized.

Description

technical field [0001] The invention belongs to the technical field of radar signal processing, in particular to an anti-spoofing jamming method for multi-base SAR. Background technique [0002] Synthetic Aperture Radar (SAR) is a two-dimensional high-resolution imaging system with all-weather and all-weather characteristics. High resolution, and the imaging quality is not affected by weather conditions (clouds, light), etc., and has the characteristics of detecting and locating long-distance targets. At present, SAR has been widely used in disaster monitoring, resource exploration, geological surveying and mapping, military reconnaissance and other fields. Compared with traditional single-base SAR, multi-base SAR can obtain more abundant target scattering information, has good concealment, anti-interception, and multi-view imaging capabilities, and its receiving station is low in cost and flexible in configuration. With the increasing demand for information, the research ...

AI Technical Summary

Problems solved by technology

false targets created by such jammers are difficult to deal with directly

[0004] The current anti-spoofing jamming technology does not have much research on the situation where multiple jammers with fixed transmission delays exist at the same time, especially the research on the positioning technology of multiple jammers and the suppression technology of jamming signals

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