Calculation of Vector Transport Theory Chaff Cloud Scattering Method in Sea Background

Abstract

The invention belongs to the field of electronics and science and technology, and discloses a method for estimating sea background chaff cloud scattering based on vector transport theory, establishing a sea surface background model according to the P-M spectrum theory, and compounding it with an explosive chaff cloud model; using The K-means algorithm partitions the chaff cloud data, and uses the method of moments to calculate the attenuation coefficient in each area; based on the least square method and the KD tree algorithm, calculate and save the normal vectors of the sea surface to calculate the scattering of the sea surface Direction; the incident energy is equivalent to photons, and its process from emission to reception is tracked, and the composite model is calculated and solved for the Stokes vector to obtain the model's radar scattering cross-section area, and the polarization of the model can also be obtained by analyzing all components characteristic. The invention solves the problem of low calculation efficiency of the large-scale chaff cloud radar scattering cross-section in the prior art, and also solves the calculation problem of the composite radar scattering cross-section of the chaff cloud and the sea surface background.

Description

technical field [0001] The invention belongs to the field of electronic science and technology, and in particular relates to a method for estimating the scattering characteristics of sea background chaff clouds based on vector transport theory. Background technique [0002] At present, the closest existing technology: in electromagnetic warfare, chaff has a long history as a measure of passive interference, and has the characteristics of low cost, good effect, and simple manufacture. Radars that are mainly used to interfere with reconnaissance equipment in electronic countermeasures between the enemy and the enemy play a vital role in the defense of countries around the world. The chaff jamming technology is to release a large amount of chaff in space, resulting in a large difference between the echo obtained by the enemy radar and the real echo of the target, so that the enemy radar cannot accurately and quickly identify the target. This kind of interference method does no...

AI Technical Summary

Problems solved by technology

[0004] To sum up, there are several significant deficiencies in chaff cloud radar scattering calculation (prediction) technology: First, although the calculation of chaff cloud radar scattering cross-section based on numerical algorithms is accurate, due to the limitation of computing resources and the need to solve The number of unknowns is so large that the numerical algorithm cannot calculate the radar cross-section of large-scale chaff clouds, and thus cannot obtain its electromagnetic scattering characteristics, and thus cannot obtain the best processing method for interference or identification

[0006] (1) In the prior art chaff cloud radar scattering prediction technology, the calculation of chaff cloud radar scattering cross section based on numerical algorithm is accurate, but due to the limitation of computing resources and the huge number of unknowns to be solved, the numerical algorithm cannot calculate large Radar Cross Section of Scale Chaff Clouds

[0007] (2) There are other possible situations other than the experiment that cannot be exhausted in the existing chaff cloud radar scattering prediction technology, and the measured results are difficult to promote

[0008] (3) Existing techniques for chaff cloud radar scattering estimation exist due to the electromagnetic coupling between chaffs, while the independent scattering method ignores multiple couplings between chaffs, making the calculation results less reliable

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