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Wall clutter inhibition method based on spatial symmetry of wall-through array

A clutter suppression and symmetry technology, applied in the field of through-wall array radar imaging, can solve problems such as poor applicability, and achieve the effect of simple method, easy implementation, and simple algorithm idea.

Inactive Publication Date: 2014-12-10
NAT UNIV OF DEFENSE TECH
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Problems solved by technology

The method of eigenvalue decomposition belongs to the method of statistical processing. The biggest problem of this method is that it cannot complete the optimal selection of eigenvalues ​​adaptively, and its applicability in practice is poor.

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  • Wall clutter inhibition method based on spatial symmetry of wall-through array
  • Wall clutter inhibition method based on spatial symmetry of wall-through array
  • Wall clutter inhibition method based on spatial symmetry of wall-through array

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Embodiment Construction

[0039] The wall clutter suppression method based on the spatial symmetry of through-wall array radar is divided into four steps, as follows: figure 1 shown. The present invention will be further explained below in conjunction with the data acquired by XFDTD electromagnetic simulation software.

[0040] figure 1 It is a schematic diagram of the processing flow of the present invention. According to the processing flow, any column of the initial matrix is ​​processed in the following four steps, that is, the first step is to read the column to be processed and find the reference column; the second step is to unify the starting time of the column to be processed and the reference column; the third step , to extract the wall clutter information; the fourth step is to eliminate the wall clutter information of the columns to be processed. Finally, the initial matrix after removing the wall clutter is obtained.

[0041] figure 2 A three-dimensional scene diagram for the simulat...

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Abstract

The invention provides a wall clutter inhibition method based on spatial symmetry of a wall-through array. The method comprises that data received by the array is arranged to obtain an initial matrix, a new matrix is obtained by establishing correspondence between different reception antennae through the spatial arrangement symmetry of a wall-through array radar and eliminating wall cluster in each column of data in the initial matrix via related operation given by the invention, and an image after wall cluster elimination is obtained by carrying out imaging processing on the new matrix via a common imaging algorithm in the subsequent application. The wall clutter inhibition method can effectively inhibit wall clutters of the wall-through array radar with spatial arrangement symmetry, and at the same time the method is simple and easy to realize.

Description

technical field [0001] The invention belongs to the technical field of through-wall array radar imaging, in particular to a wall clutter suppression method based on the spatial symmetry of through-wall array radar. Background technique [0002] Through-wall array radar emits electromagnetic waves with good low-frequency penetration and uses large bandwidth to meet the requirements of distance resolution, so as to achieve high-resolution imaging of targets behind walls and even building structures, which greatly enhances the ability to acquire target information. Due to the influence of the mirror reflection of the wall, the echo intensity of the wall is much stronger than that of the target. At the same time, due to the smearing phenomenon caused by the multiple propagation of electromagnetic waves in the wall, the target is often submerged in the imaging. In the wall clutter, it seriously affects the subsequent target detection and processing, so it is necessary to suppress...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/36
Inventor 陆必应周智敏孙鑫金添宋千王建李杨寰张斓子赵洋
Owner NAT UNIV OF DEFENSE TECH