Array-radar-based extending moving-target through-wall imaging method

Abstract

The invention provides an array-radar-based extending moving-target through-wall imaging method. According to the technical scheme, the method includes the following steps that first, difference treatment is performed on every two adjacent frames of echo data with a change detection method to eliminate clutter influences; second, the echo data of all the frames are imaged sequentially; third, targets are detected with a Gaussian distribution CFAR detector; fourth, coordinates of spatial positions of the targets in the image are extracted; fifth, false targets are judged and eliminated, so that the extending moving-target imaging result of all the frames of echo data with the false targets eliminated is obtained. The method can solve the suppression problem of the false targets in the extending moving-target imaging process, meanwhile the method is easy to achieve, and the method can be used for actual engineering design and signal processing.

Description

technical field [0001] The invention belongs to the technical field of through-wall array radar imaging, in particular to a method for imaging a moving target by utilizing the expansion of the through-wall array radar while suppressing false targets during through-wall imaging. 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. In typical wall-penetrating applications, the commonly used frequency band is 1-3GHz, and the range resolution can reach 0.075m. The standard size of the most interesting human target in the research of wall-penetrating moving target imaging is 1.8m×0.5m×0.35m . Since the human target usually occupies multiple distance resolution units, it cannot be tre...

AI Technical Summary

Problems solved by technology

However, when the target is an extended target, because the actual size of the target is relatively large, it will cause a shielding effect on the electromagnetic wave, so when imaging the moving target, one or several false targets will appear, which greatly affects the accuracy of imaging the moving target through the wall nature, which limits the application of this technology in practice

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