High-resolution through-wall imaging system and method based on random antenna arrays and microwave correlated imaging principles

Abstract

The invention discloses a high-resolution through-wall imaging system and method based on random antenna arrays and the microwave correlated imaging principles. The antenna arrays which are arranged at equal distance and identical in rows are used as transmitting parts, one signal source is randomly sampled through random on and off of each array element antenna, the sampled signal source is projected to an imaging area to form a microwave field with time-space random undulatory property and statistical independence similar to a fake thermal light source, a high-resolution imaging result is acquired through one-step detection, design and manufacturing difficulty of a microwave correlated imaging system is reduced, cost is lowered, system stability and interference resistance are increased, and conditions are created for large-scale application and popularization of microwave correlated imaging. The imaging method has the advantages that the high-resolution images of indoor targets and areas blocked by a wall can be acquired, the method is insensitive to signal attenuation brought by the wall, high in noise resistance and worthy of application, and disguising performance of a detecting device and battlefield survivability of an operator are increased.

Description

technical field [0001] The invention belongs to the technical category of through-wall radar imaging, and relates to a high-resolution through-wall imaging system and method. Background technique [0002] Through-the-wall radar imaging is a kind of technology and method that uses microwave signals to image the interior of buildings, especially indoor targets and indoor environments that are blocked by concrete walls. It has very huge application value. [0003] At present, researchers and defense companies at home and abroad have developed a variety of through-wall radar imaging methods and devices for the above scenarios, mainly based on the principle of beamforming (Beamforming), synthetic aperture radar (SAR) and inverse synthetic aperture radar (ISAR) principles And the imaging theory and method of tomography (Tomography). Since the resolution of traditional microwave imaging methods is limited by the bandwidth of the signal, the existing through-wall radar imaging met...

AI Technical Summary

Problems solved by technology

Extend the theory of correlation imaging from the optical field to the microwave field, and combine it with the practical problems of through-wall imaging, which not only solves the problems of low resolution, high computational complexity, and wall resistance of existing through-wall radar imaging methods and devices in known technologies. It overcomes the problems of poor body interference ability and low concealment, and overcomes the shortcomings of the existing microwave correlation imaging method in the known technology, such as too long detection distance, too many observation times, weak scene adaptability, weak anti-noise ability, etc. High-resolution through-wall imaging of indoor targets and indoor environments blocked by walls

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