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Rain clutter identification method and system based on navigation radar

A technology of navigation radar and recognition method, applied in the field of radar, to achieve good rain clutter suppression and target detection, good effect and improved effect

Active Publication Date: 2022-04-29
BEIJING HIGHLANDER DIGITAL TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the use of the differential circuit suppresses the echoes of land targets while suppressing the rain and snow echoes, and the differential circuits are used at full range and in all directions, and small target echoes outside the rain clutter area are also very likely suppressed

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  • Rain clutter identification method and system based on navigation radar
  • Rain clutter identification method and system based on navigation radar
  • Rain clutter identification method and system based on navigation radar

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Embodiment Construction

[0063] 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 creative efforts fall within the protection scope of the present invention.

[0064] It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the specific posture changes, the directional indication will also change accordingly.

[0065] In addition, in describing the present invention, the terms used are for the purpose ...

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Abstract

The embodiment of the invention discloses a rain clutter identification method based on a navigation radar, and the method comprises the steps: carrying out the median filtering processing and minimum filtering processing of a first image, and obtaining a second image and a third image; calculating gradient values of the second image in all directions by adopting convolution templates in multiple directions, selecting a maximum value and performing threshold judgment to obtain a fourth image; performing connected domain processing on the fourth image to obtain a fifth image; performing target area detection on the fifth image by using the pixel value information of the second image and the connected domain information of the fifth image to obtain a sixth image; replacing the pixel value of the target area of the second image by using the target area of the sixth image and the pixel value of the third image to obtain a seventh image; and smoothing the seventh image to obtain an eighth image. The embodiment of the invention further discloses a rain clutter recognition system based on the navigation radar. According to the method, the rain clutter is identified, and rain clutter suppression and target detection can be better carried out after identification.

Description

technical field [0001] The invention relates to the technical field of radar, in particular to a method and system for identifying rain clutter based on navigation radar. Background technique [0002] It is difficult for radar to distinguish the distance between adjacent raindrops, so the echo videos generated by rain reflection all form loose cotton-wool-like continuous bright spot areas without obvious edges on the screen. The greater the rainfall, the thicker the raindrops, the shorter the radar operating wavelength, the wider the antenna beam and the wider the pulse used, the stronger the rain reflection, and the echoes of small targets in the bright rain spot will be submerged. On the contrary, the rain reflection is weaker. In the prior art, radar echo video images are usually processed by differential circuits to suppress rain and snow interference. The wide interference video pulse formed by raindrops contains a wide range of gentle DC components. Differentiation c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41G01S7/292
CPCG01S7/414G01S7/2923Y02A90/10
Inventor 杨婧周双林王晓谊夏文涛刘波
Owner BEIJING HIGHLANDER DIGITAL TECH
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