Radar target detection method under sea clutter background based on alternating direction method

A technology of alternating direction method and radar target, which is applied in the field of radar target detection under the sea clutter background based on the alternating direction method, to achieve the effect of improving speed and accuracy, efficient sea clutter suppression method, and strong applicability

Pending Publication Date: 2021-12-31
HAIHUA ELECTRONICS ENTERPRISECHINA CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the defects and deficiencies in the prior art, the present invention provides a radar target detection method based on the alternate direction method under the background of sea clutter to realize the suppression of sea clutter and the extraction of interested targets; the present invention from the perspective of image processing Starting from the problem of separating clutter and target in ocean surveillance radar images, it is transformed into a matrix factorization problem. Aiming at the low-rank characteristics of the sea clutter background and the sparse characteristics of moving targets, the Alternating Direction Method (ADM) is used to directly separate the two different The part of the characteristics (that is, the clutter and the target) is regarded as two variables.

Method used

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  • Radar target detection method under sea clutter background based on alternating direction method
  • Radar target detection method under sea clutter background based on alternating direction method
  • Radar target detection method under sea clutter background based on alternating direction method

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Example Embodiment

[0055] Example 1

[0056] like figure 1 , figure 2 As shown, the present embodiment provides a method of radar target detection method based on the alternating direction method, in order to effectively suppress the sea throwback and extract the target, the present embodiment considers the matrix M that is reorganized by the radar image, Decompose into a low rank matrix portion L (background clutter), and a sparse matrix portion S (interest target), and M, L, Where M × 2 indicates that the matrix has a M line 2 column, which can be modeled as the optimization problem:

[0057]

[0058] s.t.L + S = M

[0059] Which, rank (·) represents the rank of the matrix, || · || 0 0 represents the norm, i.e. corresponding vector or the number of nonzero matrix elements.

[0060] Since rank (L) and S || || 0 Nonconvex are nonlinear, it is difficult to optimize the actual, the aforementioned problems can then be relaxed as the following optimization model, the problem is also known as Robust Pri...

Example Embodiment

[0104] Example 2

[0105] The present embodiment provides a radar target detection system of the Alternating Direction Method sea clutter, including those based on: normalization module, the restructure module matrix, separation module, the iteration condition setting module and a restoration module;

[0106] In the present embodiment, normalization means for selecting two radar images are normalized;

[0107] In the present embodiment, the recombinant means for the matrix from two radar images after the normalization of a matrix by a plurality of recombinant column;

[0108] In the present embodiment, the separation module based on the former sub Alternating Direction Method matrix multiplier after each recombination, background separation, decomposing a low rank and sparse matrices, said matrix corresponding to the rank low sea clutter components, the said sparse matrix corresponding to the target component of interest;

[0109] Embodiment, the iterative condition setting means ...

Example Embodiment

[0111] Example 3

[0112] This embodiment provides a storage medium, and the storage medium may be a storage medium such as a ROM, a RAM, a disk, a disc, and a storage medium stores having one or more programs, the program being executed by the processor, implements the embodiment according to Example 1 Radar Target Detection Method under Alternating Direction Law Background.

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Abstract

The invention discloses a radar target detection method under a sea clutter background based on an alternating direction method (ADM). The method comprises the following steps: selecting two frames of radar images for normalization; recombining the normalized two frames of radar images into a plurality of matrixes according to columns; subjecting each recombined matrix to foreground and background separation based on an alternating direction multiplier method, decomposing the recombined matrix into a low-rank matrix and a sparse matrix, wherein the low-rank matrix corresponds to a sea clutter component, and the sparse matrix corresponds to an interested target component; setting an ADM iteration stop condition of each recombination matrix; sequentially arranging the separated low-rank matrixes according to columns to form a recovery matrix, detecting a sea clutter result; and sequentially arranging the separated sparse matrix into a recovery matrix according to columns, and detecting an interested target result. According to the invention, the difficulty of hyper-parameter selection when the matrix separation technology is applied to clutter suppression is reduced, and target extraction and clutter suppression are effectively realized.

Description

technical field [0001] The invention relates to the technical field of radar target detection, in particular to a radar target detection method based on an alternating direction method under sea clutter background. Background technique [0002] The tasks of developing, utilizing, protecting, and controlling the ocean are becoming more and more arduous. The successful completion of these tasks is inseparable from the information obtained by various ocean monitoring radar systems. However, the non-uniform, non-stationary and non-Gaussian characteristics of sea clutter make it easy to produce extremely strong echoes (sea wave peaks). These strong echoes are very similar to the characteristics of target echoes. If they are not effectively filtered, It will cause a large false alarm. Therefore, ocean surveillance radars have to have strong sea clutter suppression capabilities in order to better detect various targets. Therefore, how to get close to the actual application scene ...

Claims

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Application Information

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IPC IPC(8): G01S7/36G01S13/89G06F17/16
CPCG01S7/36G01S13/89G06F17/16
Inventor 郑春弟余美仪陈朝晖宋朋李猛江蓉
Owner HAIHUA ELECTRONICS ENTERPRISECHINA CORP
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