Method of suppressing of ultra-low-altitude target mirror image interference using Brewster effect

An image interference, ultra-low-altitude technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of high cost and poor effect, and achieve the effect of good effect and low processing cost.

Inactive Publication Date: 2017-11-17
XIDIAN UNIV +1
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Problems solved by technology

The traditional image processing method uses passive signal processing to suppress it. Considering factors such as the capacity of

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  • Method of suppressing of ultra-low-altitude target mirror image interference using Brewster effect
  • Method of suppressing of ultra-low-altitude target mirror image interference using Brewster effect
  • Method of suppressing of ultra-low-altitude target mirror image interference using Brewster effect

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Embodiment Construction

[0044] The technical solution of the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0045] The first step is to build an electromagnetic simulation model based on the ultra-low-altitude target-environment coupling scattering mechanism, obtain the image interference scattering intensity of ultra-low-altitude missile targets in different battlefield environments, and find the best Brewster angle of attack in the corresponding environment.

[0046] The target-environment multipath scattering is mainly considered to be the vector superposition of scattered echoes from four paths.

[0047] like figure 2 As shown, the electromagnetic wave scattering and propagation path of path 1 is "seeker → target → seeker", and the generated target field is denoted as E 1 (θ 1 ,θ 1 ), is a monostatic scatter.

[0048] The electromagnetic wave scattering and propagation path of path 2 is "seeker→target→envi...

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Abstract

The invention discloses a method for suppressing ultra-low-altitude target mirror image interference using the Brewster effect. The method comprises the steps of setting up, according to an ultra-low-altitude target-environment coupling scattering mechanism, a four-path electromagnetic simulation model, obtaining the mirror image interference scattering intensity of an ultra-low-altitude guided missile target under different battlefield environments, and finding an optimal Brewster's angle of attack under each corresponding environment. Simulation of target-environment composite scattering characteristics under various conditions is performed by using the electromagnetic calculation model, the Brewster's angle in each different environment is found and the signal-to-interference ratio characteristics under the Brewster's angles are compared. According to different target parameters, guidance parameters of a guided missile and the guided missile tracking law are subjected to guided missile guidance rate constraint and optimization design, the grazing angle is enabled to be as close to the Brewster's angle as possible according to a certain optimization method, and the Brewster ballistic optimization design is completed. According to the invention, the suppression performance of the ultra-low-altitude target mirror image interference can be improved with low signal processing cost.

Description

technical field [0001] The present invention mainly relates to the image interference suppression problem when the radar seeker of an air defense missile intercepts an ultra-low-altitude penetration target, and relates to a method for suppressing image interference of an ultra-low-altitude target by using the Brewster effect. Specifically, it relates to a novel Active ultra-low altitude image interference suppression method using Brewster effect. Background technique [0002] In modern air defense operations, low-altitude / ultra-low-altitude penetration has become a conventional and effective combat pattern by using the cover of the complex battlefield environment. When the target penetrates the defense at low altitude / ultra-low altitude, the target and the environment below produce radar multipath effect. Multipath effect is a kind of interference with similar target characteristics, called mirror image interference. Mirror image interference affects the detection of ultra-l...

Claims

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Application Information

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IPC IPC(8): G01S7/38
CPCG01S7/38
Inventor 彭鹏李西敏童创明孙华龙
Owner XIDIAN UNIV
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