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RCS conversion method based on scattering center matrix

A technology of scattering centers and conversion methods, applied in radio wave measurement systems, instruments, etc., can solve problems such as parameter changes that cannot be applied to coupled scattering points

Inactive Publication Date: 2014-01-01
SHANGHAI RADIO EQUIP RES INST
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Problems solved by technology

[0013] In order to solve the problems that the existing RCS conversion approximation technology has great limitations and cannot be applied to situations where the local coupling of the target is strong and the parameters of the scattering points change, the present invention provides an RCS conversion method based on the scattering center matrix

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  • RCS conversion method based on scattering center matrix

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Embodiment Construction

[0055] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0056] Such as figure 1 As shown, the RCS conversion method based on the scattering center matrix of the present invention comprises the following steps:

[0057] (A), rough target shape acquisition and block preprocessing

[0058] Through surveying and mapping, obtain the general shape of each part of the target and the geometric positional relationship between them, ignoring the details such as the surface roughness and deformation of the target, and establish a rough target model; then according to the positional relationship between the various parts of the target and the observation distance, according to the far-field approximation conditions Carry out block division, that is, the size of each block is taken as

[0059] ...

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Abstract

The invention relates to an RCS conversion method based on a scattering center matrix. The method comprises the steps of adopting a moment method or an iterative physical optical method to obtain the approximation relation between an induction source and an exposure field according to a set target rough geometric model, and setting the scattering center conversion matrix between the exposure field and the RCS with a target to be measured comprising an undetermined coefficient; according to the observation direction required to conduct RCS conversion, using the direction of an observation center as a fixed incident angle, and obtaining double-station scattering performance data under the different scattering angles of the target to be measured; adopting the least square method to determine the undetermined coefficient in the conversion matrix; achieving the RCS conversion of the target. The method is not limited in the high-frequency area, the suitable angle range is larger, the required data size is small, and engineering realization is easy.

Description

technical field [0001] The invention relates to the field of target electromagnetic scattering characteristic data processing, in particular to an RCS conversion method based on a scattering center matrix. Background technique [0002] At present, the target RCS (radar cross section) conversion methods mainly include the conversion method based on the tangential field distribution of the surrounding surface, the conversion method based on scattering imaging, and the convolution extrapolation algorithm. Among them, the theoretical basis of the conversion method based on the tangential field distribution of the surrounding surface is the Huygens principle, and the accuracy of the RCS conversion is relatively high, but this method requires a huge amount of bi-station RCS data to be measured, and it is necessary to measure different incident angles and different scattering For the dual-station RCS data under the angle, the cost of engineering implementation is relatively high; t...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/41
Inventor 梁子长高伟
Owner SHANGHAI RADIO EQUIP RES INST
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