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Radar image clutter suppression method based on time-domain characteristics

A radar image and clutter suppression technology, applied in radio wave measurement systems, instruments, etc., can solve problems affecting algorithm efficiency, tracking algorithm burden, difficult real-time processing, etc., to improve detection sensitivity and improve detection capabilities.

Active Publication Date: 2014-12-10
CHINA ACAD OF CIVIL AVIATION SCI & TECH
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  • Abstract
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Problems solved by technology

However, this kind of scheme will bring an excessive burden to the tracking algorithm, seriously affect the efficiency of the algorithm, and it is difficult to realize real-time processing

Method used

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Embodiment

[0043] The method for clutter suppression of radar images based on time domain characteristics proposed by the present invention will be illustrated and described below in conjunction with the processing results of a certain PPI radar image sequence in the accompanying drawings.

[0044] The background of PPI radar contains a large number of stationary objects, most of which are non-rigid targets (forest, grass, water surface, etc.). The method of the invention uses the time-domain characteristics of the target and the clutter in the radar image to correct the segmentation threshold, so as to improve the detection rate while maintaining a low false alarm rate.

[0045] figure 2 It is a radar image containing a target motion trajectory (continuous rectangular box) according to an embodiment of the present invention, the image size is 456×456, the coordinate origin is in the upper left corner of the image, the X axis is horizontally to the right, and the Y axis is vertically do...

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Abstract

The invention discloses a radar image clutter suppression method based on time-domain characteristics. According to the method, based on time-domain characteristics of a radar moving target, a dim target is detected, and great clutter information is suppressed. The method includes the steps such as background differentiation, clutter suppression, measurement information extraction and multi-target tracking. In the clutter suppression step, through measurement information output in the step of measurement information extraction and time-domain characteristics such as a target path output in the step of multi-target tracking, a target detection segmentation threshold is corrected. The method has the advantages that the defect that the traditional clutter suppression method performs threshold segmentation only by the aid of a gray level, clutter jamming is maximally suppressed on the basis of time-domain characteristics, and the method is applicable to detection and tracking of dim moving targets on the basis of PPI (plain position image) radar images.

Description

technical field [0001] The invention relates to a radar image clutter suppression method based on time domain characteristics, belongs to the technical field of low-altitude airspace security monitoring, and relates to radar image processing and target detection. Background technique [0002] The primary radar has the characteristics of low cost, convenient erection and strong independent workability, and is an important means of airspace security surveillance. The primary radar itself does not have the function of moving target detection. The mature radar monitoring system usually uses the image acquisition card to transmit the radar plane position indication image (plane echo display map, PPI) to the computer, and then the back-end image-based target detection algorithm is used. Process it and extract the moving target information from it. Since the area monitored by the system is low-altitude airspace, the background environment is complex, and the noise interference is ...

Claims

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Application Information

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IPC IPC(8): G01S7/41
CPCG01S7/414G01S7/415
Inventor 陈唯实李敬
Owner CHINA ACAD OF CIVIL AVIATION SCI & TECH
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