Single-pulse radar coherent jamming method based on target range profile template matching

Abstract

The invention relates to the technical field of radar electronic countermeasures, and discloses a single-pulse tracking and guiding radar coherent jamming method based on target range profile template matching. The method is characterized in that frequency domain response of an all-attitude angle target is established on an operating frequency of a typical airborne single-pulse tracking and guiding radar, and database construction of an all-attitude angle extended target range profile is completed; parameter measurement, feature extraction and signal reconstruction are carried out on radar signals when a ship-borne electronic support measure (ESM) reconnaissance system reconnoiters transmitting signals of the airborne tracking and guiding radar; a ship-borne jammer carries out matching processing on reconstructed signals and scattering properties of a protected target, additional phase shift and time delay parameters are set, and jamming signals which have a stable phase relation with target echoes are generated. The single-pulse radar coherent jamming method is applicable to jamming devices on various platforms of ships, airplanes and the like, a self-defense electronic jamming ability is provided in allusion to an extended target, and the single-pulse tracking and guiding radar is enabled to create a good angle deception jamming effect.

Description

technical field [0001] The invention relates to the technical field of radar electronic countermeasures, in particular to a monopulse radar coherent jamming method based on target range image template matching for complex extended targets. Background technique [0002] Monopulse radar has fast angle measurement and high precision. It is the most effective detection method for long-distance moving or stationary targets. It has been widely used in various ground tracking and guidance radars and airborne radars. In recent years, the research on jamming technology of monopulse tracking and guidance radar has been deepened. [0003] At present, the research on coherent jamming for monopulse tracking guidance radar mainly focuses on the traditional two-point source / multi-point source coherent angle deception jamming. Coherent two-point source interference is to set an interference source near the target in the irradiation beam of the monopulse tracking guidance radar, treat the t...

AI Technical Summary

Problems solved by technology

However, in the protection scenarios of sea surface early warning and large complex targets, the covered targets are mainly extended targets such as ships. When the incident signal has a large bandwidth (not less than 140MHz) and a high distance resolution, such large The echo phase of the target will be affected by the complex scattering characteristics of the target

At this time, it is difficult for the signal phase of the real target echo to reach the antenna aperture to maintain a stable relationship with the interference signal generated based on the particle model, so that the phase difference Δφ between the echo signal and the interference signal at the antenna aperture presents a random distribution, that is, the interference The signal cannot be coherent with the echo signal

Therefore, the coherent interference method based on the traditional particle model is ineffective

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