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Underwater sound matched field localization method based on compressed sensing

A technology of compressed sensing and positioning method, which is applied in positioning, measuring devices, instruments, etc., and can solve the problem of not using the spatial spectral sparsity of underwater targets.

Active Publication Date: 2016-08-17
常熟海量声学设备科技有限公司
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Problems solved by technology

The existing matching field processors mainly use ocean channel knowledge and sound pressure data, they do not take advantage of the sparsity of the underwater target spatial spectrum

Method used

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  • Underwater sound matched field localization method based on compressed sensing
  • Underwater sound matched field localization method based on compressed sensing
  • Underwater sound matched field localization method based on compressed sensing

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Embodiment Construction

[0058] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0059] like Figure 4 As shown, the present invention provides a method for positioning an underwater acoustic matching field based on compressed sensing, comprising the following steps:

[0060] Step 1, determine the search range of the sound source.

[0061] figure 1 Shown is a schematic diagram of the simulation environment, the receiving array is figure 2 The position shown is vertical, with the sound source on the right side of the receive array. The propagation characteristics of sound waves in the ocean are very complicated, but the propagation process can be explained by the wave equation. In this embodiment, the normal wave model is used to measure the sound field.

[0062] Within the observation range, discretize the observation range area into Q grid points to obtain the grid area (R, Z), where R represents the distance rang...

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Abstract

The invention discloses an underwater sound matched field localization method based on compressed sensing. Firstly, the search range of a sound source is determined, the sound field function at grid points is calculated according to an underwater sound signal received by an array and a sound field propagation model, and matching field localization is performed on a target; sparse reconstruction is performed on the received signal according to the compressed sensing theory; the signal is reconstructed with a smooth 10 norm method; the reconstructed signal is optimized and solved, and the reconstructed signal which most approximates an original signal is obtained. With the adoption of the method, the most essential characteristic of the sound source signal can be extracted, the noise removal effect is realized, and the localization accuracy is improved.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic engineering, and relates to a sound source localization method, in particular to a localization method for matching field sources based on compressed sensing. Background technique [0002] Sound waves propagate in seawater with little attenuation and are less affected by suspended matter in the water, making them suitable for long-distance information transmission. Therefore, sound waves are the main carrier of underwater information, and the ocean is a complex environment limited by the sea surface above and the bottom below. acoustic waveguide. The underwater target source of interest radiates / reflects the acoustic signal, which propagates in the ocean channel, and the hydrophone receives the array sampling signal. Underwater target source location is to estimate the target source position by analyzing and processing the signals received by the sensor array and the ocean channel kno...

Claims

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Application Information

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IPC IPC(8): G01S5/18
CPCG01S5/18
Inventor 王彪蒋亚立戴跃伟杨奕飞
Owner 常熟海量声学设备科技有限公司
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