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Water surface target radiation noise simulation method

A technology for radiating noise and water surface targets, applied in the field of underwater acoustic signal processing, to achieve the effects of comprehensive noise, simplified difficulty, and improved computing speed

Inactive Publication Date: 2013-09-25
INST OF ACOUSTICS CHINESE ACAD OF SCI
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Problems solved by technology

[0005] The purpose of the present invention is to overcome the shortcomings of the prior art in practicability, comprehensiveness and real-time performance when simulating complex noise, thereby providing a fast, comprehensive and practical method for simulating noise of water surface targets

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  • Water surface target radiation noise simulation method
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  • Water surface target radiation noise simulation method

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Embodiment Construction

[0045] The present invention will be further described now in conjunction with accompanying drawing.

[0046] Considering that the identification of water surface targets in the prior art is accomplished by analyzing and extracting the power spectrum characteristics of the radiation noise of the water surface target, therefore, in the present invention, to realize the simulation of the target radiation noise is to generate a broadband signal, and The power spectrum of the broadband signal is made to have the power spectrum characteristics of the target radiation noise.

[0047] Those skilled in the art can know from the analysis of the power spectrum characteristics of the radiated noise of the water surface target that: since the radiated noise of the water surface target is produced by the comprehensive action of many noise sources, its power characteristics are relatively complicated, and the different navigation states of the same water surface target It will also have a d...

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Abstract

The invention relates to a water surface target radiation noise simulation method. The method includes the steps that an original value of a parameter needed in input radiation noise simulation according to a scene to be simulated; according to the scene to be simulated, a specific-frequency response filter for simulating continuous spectrum components are divided into sub filters, and central frequency points and a filter attenuation coefficient of each sub filter are updated; a random copy of wide-band noise is generated; according to the original value of the parameter, line spectrum components of noise to be simulated are generated; the random copy of the wide-band noise generates continuous spectrum signals through the specific-frequency response filter; interference signals are generated; line spectrum signals, the continuous spectrum signals and the interference signals are overlapped to obtain water surface target radiation noise to be simulated. According to the water surface target radiation noise simulation method, when the water surface target radiation noise is simulated, dynamic characteristics in line spectrum noise are taken into account, so that the noise simulated through the method is more comprehensive.

Description

technical field [0001] The invention relates to the field of underwater acoustic signal processing, in particular to a method for simulating radiation noise of a water surface target. Background technique [0002] The ship radiation noise signal refers to the noise signal generated by various rotating and reciprocating parts on the ship. According to its source, it generally includes mechanical noise, propeller noise, hydrodynamic noise, etc. In the field of actual underwater acoustic signal processing, the radiated noise signal of ships in seawater has always been a research hotspot. It is the only source of information for passive acoustic detection equipment. This information can be used for acoustic detection of ship targets, Identification, orientation, positioning and tracking of targets, etc. In the research of passive positioning of ship targets, various and different types of ship radiation noises are required. It is not realistic to use many different types of rea...

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Application Information

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IPC IPC(8): G01S7/40G01S7/537
Inventor 解恺李启虎丁雪洁黄海宁
Owner INST OF ACOUSTICS CHINESE ACAD OF SCI
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