Range-extended target adaptive detection method under inverse Gaussian texture complex Gaussian clutter

Abstract

The present invention belongs to the technical field of radar target detection and discloses a range-extended target adaptive detection method under inverse Gaussian texture complex Gaussian clutter for the target detection under a wideband radar system. The method comprises a step of establishing the binary hypothesis model of radar target detection, a step of using a spherically invariant vector process model to construct an inverse Gaussian texture complex Gaussian clutter signal, a step of using a generalized likelihood ratio to obtain a range-extended target adaptive detector under the inverse Gaussian texture complex Gaussian clutter, a step of determining the detection threshold of the adaptive detector, a step of obtaining radar echo data and determining the detection statistic amount of the radar echo data according to the adaptive detector, and a step of judging whether the radar echo data has a range-extended target according to the detection statistic amount and the detection threshold, and if the detection statistic amount is larger than the detection threshold, determining that the radar echo data has the range-extended target, otherwise, determining that the radar echo data has no range-extended target.

Description

technical field [0001] The invention relates to the technical field of radar target detection, in particular to an adaptive detection method for range extension targets under inverse Gaussian texture composite Gaussian clutter, which can be used for target detection under a broadband radar system. Background technique [0002] The application of radar mainly has two aspects: on the one hand, remote sensing of the atmosphere, land, ocean, etc.; on the other hand, detection and identification of targets. The principle of electromagnetics based on radar application is that an object will scatter the electromagnetic waves irradiated on its surface, and some relevant information of the irradiated object, such as electromagnetic scattering characteristics and geometric shape, can be obtained through the intercepted scattered electromagnetic waves. Among the electromagnetic echoes received by the radar, the electromagnetic echoes generated by various scatterers that are not expecte...

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Problems solved by technology

Under the K-distributed clutter model, scholars have designed many adaptive detectors for range-extended targets, but there is little research on adaptive detectors for range-extended targets under inverse Gaussian texture composite Gaussian clutter, so inverse Gaussian texture composite It is necessary to study and design an adaptive detector for range-extended targets under Gaussian clutter

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