An Adaptive Object Detection Method Based on Fine Clutter Image

A target detection and clutter map technology, applied to radio wave measurement systems, instruments, etc., can solve problems such as difficult adaptive method selection and processing, and difficult to effectively improve target detection performance, so as to achieve easy hardware implementation and improve radar detection capabilities , to suppress the effect of false alarms

Active Publication Date: 2019-07-09
利国智能科技(昆山)有限公司
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Problems solved by technology

Traditional super clutter detection methods are difficult to effectively realize adaptive method selection and processing, and it is difficult to effectively improve target detection performance

Method used

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  • An Adaptive Object Detection Method Based on Fine Clutter Image
  • An Adaptive Object Detection Method Based on Fine Clutter Image
  • An Adaptive Object Detection Method Based on Fine Clutter Image

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Embodiment Construction

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0032] An embodiment of the present invention provides an adaptive target detection method based on a fine clutter map, referring to figure 1 , the method includes the steps of:

[0033] Step 1: Obtain the target echo signals after the radar transmits L consecutive pulses, and sequentially perform pulse compression processing on the L target echo signals to obtain L signals after pulse compression processing.

[0034] Specifically, the pulse compression proce...

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Abstract

The invention belongs to the field of the radar signal processing technology, and discloses an adaptive target detection method based on a fine clutter map. An improved fine clutter map is adopted, and ground clutters and sea clutters are updated in different ways according to different clutter attributes. Different from traditional clutter map updating methods where only the amplitude information is updated, the method of the invention simultaneously counts and updates amplitude and variance parameters and applies the variance information in the subsequent signal weighting so as to effectively suppress false alarms which may be caused by sea peaks. Different from traditional constant false alarm threshold methods, the method of the invention adopts the technical scheme of simultaneously seeking fast and slow threshold constant false alarm thresholds and automatically selects the fast and slow constant false alarm thresholds according to certain criteria, thereby effectively improving the constant false alarm effect.

Description

technical field [0001] The invention relates to the technical field of radar signal processing, in particular to an adaptive target detection method based on fine clutter images. Background technique [0002] The ever-increasing military transformation has put forward higher and higher requirements for the detection performance of radar. There are often complex strong ground clutter, sea clutter and other kinds of clutter around the target. The clutter intensity is generally very large, often much stronger than the target echo signal, causing serious interference to target detection. So the radar must try to suppress the clutter before the target detection. [0003] For the detection of low-speed targets, due to the overlapping of the Doppler spectrum of the clutter and the Doppler spectrum of the low-speed target signal, whether it is the traditional kalmus filter or the MTI / MTD technology, it is through presenting a deep stop at zero frequency. With notches, the essence...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 苏涛于祥龙邱瑾蔡晓磊吴凯
Owner 利国智能科技(昆山)有限公司
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