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InSAR technology-based linear scanning near-field RCS test clutter suppression method

A linear scanning and clutter suppression technology, applied in the field of signal feature control and electromagnetic scattering measurement, can solve the problems of high time cost and large limitations of testing, and achieve the effect of suppressing site stray echoes and improving test accuracy.

Active Publication Date: 2017-03-22
BEIJING INST OF ENVIRONMENTAL FEATURES
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Problems solved by technology

However, the time cost of the test of this method is extremely high and it has great limitations in practical application.

Method used

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  • InSAR technology-based linear scanning near-field RCS test clutter suppression method
  • InSAR technology-based linear scanning near-field RCS test clutter suppression method
  • InSAR technology-based linear scanning near-field RCS test clutter suppression method

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Embodiment Construction

[0037] Exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is for the purpose of illustration only, and in no way limits the invention and its application or usage.

[0038] Such as figure 1 As shown, the present invention is based on the linear scan near-field radar cross-section (Radar Cross-Section, RCS) of InSAR technology to test the clutter suppression method, comprising the steps:

[0039] S1. Scan the target in a straight line under two height conditions to obtain two two-dimensional images of the target;

[0040] S2. Determine the height of each scattering source of the target according to the height difference Δh of the two linear scans and the phase difference Δφ of the two two-dimensional images;

[0041] S3. Based on the height of each scattering source of the target, the target is filtered in the height direction, and the filtered scattering so...

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Abstract

The invention discloses an InSAR technology-based linear scanning near-field RCS test clutter suppression method and relates to the technical fields of electromagnetic scattering measurement and signal characteristic control. The method comprises the steps of respectively conducting two linear scanning operations on a target in two height conditions so as to obtain two two-dimensional images of the target; according to a height difference between heights obtained through the two linear scanning operations and the phase difference between the two two-dimensional images, determining the height of each scattering source of the target; based on the height of each scattering source of the target, filtering the target in the height direction, reconstructing the filtered scattering source to obtain a clutter-suppressed target RCS. Based on the InSAR technology, the near field of the target is subjected to linear scanning, so that echo data can be rapidly and efficiently acquired. Meanwhile, the interference avoidance is conducted based on the phase information of two height acquisition data, so that the phase unwrapping within a certain height range is realized. Therefore, the height of the scattering source can be uniquely determined. According to the technical scheme of the invention, through the vertically spatial filtering process, angel echoes at the site can be inhibited and the test accuracy is improved.

Description

technical field [0001] The invention relates to electromagnetic scattering measurement and signal characteristic control technology, in particular to a linear scanning near-field RCS test clutter suppression method based on InSAR technology. Background technique [0002] The technical background related to the present invention will be described below, but these descriptions do not necessarily constitute the prior art of the present invention. [0003] When conducting RCS tests in the field, it is necessary to control the background stray echoes of the site to improve the test accuracy. Due to the constraints of the site, equipment and other factors, it is generally impossible to suppress the stray echo of the site through the method of vector background cancellation, and the method of software / hardware range gate is adopted to reduce the background. The basic principle is to perform spatial filtering based on prior target spatial distribution information to improve the sig...

Claims

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Application Information

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IPC IPC(8): G01S7/36G01S7/40
CPCG01S7/36G01S7/40
Inventor 吕鸣高超
Owner BEIJING INST OF ENVIRONMENTAL FEATURES
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