Characteristic matching method of underground water target based on power spectrum

A technology of target feature and matching method, which is applied in the direction of sound wave re-radiation, utilization of re-radiation, measurement device, etc., can solve the problems of mismatched feature extraction, poor matching, incompleteness, etc.

Inactive Publication Date: 2013-04-24
SOUTHEAST UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to provide a power spectrum-based underwater acoustic target feature matching method, which overcomes the existing methods with single means, complex calculations, easy to cause wrong matching, and incomplete and unreliable feature extraction. Failure to solve the problem of matching the characteristics of underwater acoustic target radiation noise in navigation

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  • Characteristic matching method of underground water target based on power spectrum
  • Characteristic matching method of underground water target based on power spectrum
  • Characteristic matching method of underground water target based on power spectrum

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Embodiment Construction

[0075] Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0076] Such as figure 1 , the underwater acoustic target radiation noise power spectrum is the superposition of the continuum component and the line spectrum component, the present invention uses the periodogram method to calculate the power spectrum of the underwater acoustic target radiation noise signal, and obtains the power spectrum by extracting the continuum component and the line spectrum component The continuum feature and line spectrum feature of the continuum feature and the line spectrum feature; respectively establish the feature matching criteria of the continuum feature and the line spectrum feature, and match with the sample features in the previously established radiated noise power spectrum feature library of the underwater acoustic target to complete the feature of the underwater acoustic target match.

[0077] Such as image 3 As...

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Abstract

The invention relates to a characteristic matching method of an underground water target based on a power spectrum, and is characterized in that the radiation noise power spectrum of the underground water target is the superposition of continuous spectrum components and line spectrum components; the continuous spectrum characteristics and line spectrum characteristics of the power spectrum are obtained by extracting the continuous spectrum components and the line spectrum components; and the characteristic matching rules of the continuous spectrum characteristics and the line spectrum characteristics are respectively established and matched with the sample characteristics in an underground water target radiation noise power spectrum characteristic library which is established in advance, thereby finishing the characteristic matching of the underground water target.

Description

technical field [0001] The invention relates to an underwater acoustic target classification and recognition method in the technical field of underwater acoustic signal processing, in particular to a power spectrum-based underwater acoustic target feature matching method. It realizes the classification and recognition of underwater acoustic targets by extracting the continuous spectrum features and line spectrum features in the power spectrum of underwater acoustic target radiation noise, and matching the above two features with the samples in the underwater acoustic target power spectrum feature library. Background technique [0002] The classification and recognition of underwater acoustic targets depends on the characteristics of the targets. Underwater acoustic target recognition is also a difficult problem in the field of underwater acoustic signal processing at home and abroad. At present, there is no method recognized as an effective way to solve the problem of target...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S7/539G01S15/88
Inventor 安良方世良罗昕炜李焜
Owner SOUTHEAST UNIV
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