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Extraction method of neighbourhood fitted RCS sequence characteristics

A feature extraction and neighborhood technology, applied in the field of neighborhood fitting RCS sequence feature extraction, can solve the problem of ignoring local structural features of target recognition, and achieve the effect of improving target recognition performance

Active Publication Date: 2018-09-21
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, the traditional transformation method ignores the local structural features that are more conducive to target recognition, so there is room for further improvement in the recognition performance of the existing traditional transformation method

Method used

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  • Extraction method of neighbourhood fitted RCS sequence characteristics
  • Extraction method of neighbourhood fitted RCS sequence characteristics
  • Extraction method of neighbourhood fitted RCS sequence characteristics

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Embodiment Construction

[0033] The actual application effect of the present invention is described below in conjunction with simulation data:

[0034] Design four kinds of dummy targets: real target, debris, light bait and heavy bait. The real target is a conical target, its geometric dimensions: length 1820mm, bottom diameter 540mm; light bait is a conical target, its geometric dimensions: length 1910mm, bottom diameter 620mm; heavy bait is a conical target, its geometric dimensions: length 600mm, Bottom diameter 200mm. The precession frequencies of true target, light bait and heavy bait are 2Hz, 4Hz and 10Hz, respectively. The RCS sequences of true targets, light decoys and heavy decoys are calculated by FEKO, the radar carrier frequency is 3GHz, and the pulse repetition frequency is 20Hz. The RCS sequence of the fragments is assumed to be a Gaussian random variable with a mean of 0 and a variance of -20dB. The polarization mode is VV polarization. The calculation target runtime is 900 seconds....

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Abstract

The invention belongs to the technical field of radar target recognition, and particularly discloses an extraction method of neighbourhood fitted RCS sequence characteristics. The method comprises thefollowing steps: firstly, fitting a certain sample characteristic by utilizing a neighbourhood sample characteristic, taking a fitting error as a target function, establishing a transformation matrix, maintaining sample neighbourhood local structure information by utilizing characteristics extracted through the transformation matrix. The method improves target recognition performance, overcomes the disadvantage that the traditional transformation method can only extract global structure characteristics, and performs simulation experiments on RCS data of four types of simulated targets, and experiment results prove the validity of the method.

Description

technical field [0001] The invention belongs to the technical field of radar target recognition, in particular to a neighborhood fitting RCS sequence feature extraction method. Background technique [0002] In radar target recognition, the traditional transformation method analyzes the data from an overall perspective, and can extract the global structural features of the target data. For example, the principal component analysis transformation method can maintain the main energy direction of the distribution of all training target data, and identify the target category based on the difference characteristics of the main energy direction, while the discriminant vector transformation method increases the difference between the characteristics of heterogeneous targets while reducing the similarity. The difference between target features, thereby improving the target recognition rate. However, the traditional transformation method ignores the local structural features that are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/46G06F17/16
CPCG06F17/16G06V10/462
Inventor 周代英冯健张瑛
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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