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Method and system for manually inhibiting navigation radar sea clutters

A sea clutter and manual adjustment technology, applied in the field of navigation radar, which can solve the problems of weak curve adaptability and inapplicability

Active Publication Date: 2021-01-22
BEIJING HIGHLANDER DIGITAL TECH +1
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the related technology, when processing the sea clutter signal received by the radar, the sea clutter change curve is generally determined by radar equation calculation, which makes the adaptability of the curve not strong and cannot be applied to different sea areas and different sea conditions

Method used

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  • Method and system for manually inhibiting navigation radar sea clutters
  • Method and system for manually inhibiting navigation radar sea clutters
  • Method and system for manually inhibiting navigation radar sea clutters

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Experimental program
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Embodiment approach

[0166] An optional implementation manner, the basic detection curve module includes:

[0167] Weight the first amplitude values ​​of the four grids around each grid to obtain the second amplitude value of each grid, ,in, Displays the second amplitude value of the current grid, Indicates the first amplitude value of a grid on the current grid, Indicates the first amplitude value of the next grid of the current grid, Indicates the first amplitude value of the grid before the current grid, Indicates the first amplitude value of the grid after the current grid;

[0168] Perform polyline processing on the second amplitude value of each grid, wherein, during polyline processing, if the second amplitude value of the current grid is greater than the second amplitude value of the previous grid, the distance between the two grids The slope of the broken line is 0, and the basic detection curve of sea clutter with a downward trend is obtained, where, Indicates the amplitude ...

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Abstract

The invention discloses a method for manually inhibiting navigation radar sea clutters. The method comprises the following steps: meshing a scanning range; determining a first amplitude value of eachgrid contained in the current circle, a noise amplitude value corresponding to the current circle of antenna rotation, a sea clutter maximum action distance of each sector and a corresponding samplingpoint number; acquiring a second amplitude value of each grid based on the first amplitude value of the grid around each grid, and processing the second amplitude value to obtain a sea clutter basicdetection curve; and based on the sea clutter basic detection curve, manually adjusting a sea clutter gain value and a fixed gain value to obtain a sea clutter final detection curve. The invention further discloses a system for manually restraining the navigation radar sea clutters. According to the method, the sea clutter gain value and the fixed gain value are manually adjusted, so that the seaclutter detection curve is kept descending to be matched with the change trend of the sea clutters, the sea clutter final detection curve can effectively inhibit most of sea clutters, and a radar image with better quality is obtained.

Description

technical field [0001] The present invention relates to the technical field of navigation radar, in particular to a method and system for manually suppressing sea clutter of navigation radar. Background technique [0002] In the related art, when processing the sea clutter signal received by the radar, the sea clutter change curve is generally determined by means of radar equation calculation, which makes the adaptability of the curve not strong and cannot be applied to different sea areas and different sea conditions. Similarly, the amplitude distribution of sea clutter can be divided into Rayleigh distribution, Weibull distribution, normal logarithmic distribution, and K distribution. The characteristics of sea clutter under each distribution are quite different. This fixed curve and the change of sea clutter The trend fit is not high, which will affect the detection of low, small and slow targets. Contents of the invention [0003] In order to solve the above problems,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/41
CPCG01S7/414
Inventor 杨婧王伟
Owner BEIJING HIGHLANDER DIGITAL TECH