Method and device for ground moving target indication based on InSAR (interferometric synthetic aperture radar) formation

Abstract

The invention discloses a method and a device for ground moving target indication based on InSAR (interferometric synthetic aperture radar) formation. The method includes: setting up a sliding spotlight SAR echo model according to original echo signals received in a scene irradiation region, and imaging each single radar two-dimensional sliding spotlight initial SAR image in the model; enabling the plurality of imaged radar initial SAR images to form a three-dimensional matrix, and subjecting sections of the three-dimensional matrix to compressed sensing treatment to acquire SAR images; subjecting the SAR images to registration, wherein same pixels in different SAR images correspond to a same ground unit; subjecting the registered SAR images to space-time adaptive processing; subjecting the SAR images to elevation phase compensation after space-time adaptive processing; subjecting the SAR images to target detection after elevation phase compensation by means of constant false alarm rate detection. By means of elevation phase compensation, measurement accuracy can be evidently improved, and measurement errors can be controlled about 0.05.

Description

technical field [0001] The present invention relates to the technical field of ground moving target detection, in particular to a ground moving target detection method and device based on an InSAR configuration. Background technique [0002] Ground Moving Target Indication (GMTI, Ground Moving Target Indication) has special significance in military affairs, and has always been the focus of people's attention. Due to the limitation of baseline length, traditional single-satellite space-based radar greatly restricts its GMTI performance. The Interferometric Synthetic Aperture Radar (InSAR, Interferometric Synthetic Aperture Radar) system has the characteristics of long baseline and multiple baselines, and realizes high-precision imaging of the three-dimensional topography of the target ground and high-precision detection of ground moving targets. Detecting moving targets, and because of its obvious advantages in detecting low-speed moving targets, combined with InSAR to detec...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defect of low robustness caused by the clutter suppression caused by the longer vertical baseline that cannot be fully considered in the prior art when detecting ground moving targets. According to one aspect of the present invention, an InSAR-based structure is proposed. type ground moving target detection method

Images