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Weighted airspace processing towed line array sonar platform radiation noise zero response suppression method

A technology for airspace processing and radiated noise, which can be used in complex mathematical operations, sustainable transportation, etc., and can solve problems such as enhancing the target detection performance of towed array sonar

Active Publication Date: 2021-07-09
PLA DALIAN NAVAL ACADEMY
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The present invention provides a weighted airspace processing dragline array sonar platform radiation noise zero response suppression method, the technical problem to be solved is to process the array data received by the dragline array sonar, track and suppress platform radiation in real time in the array data preprocessing stage Noise, enhanced drag line array sonar target detection performance

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  • Weighted airspace processing towed line array sonar platform radiation noise zero response suppression method
  • Weighted airspace processing towed line array sonar platform radiation noise zero response suppression method
  • Weighted airspace processing towed line array sonar platform radiation noise zero response suppression method

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Embodiment Construction

[0041] Specific embodiments of the present invention will be described in detail below in conjunction with schemes and accompanying drawings.

[0042] Such as figure 1 As shown in the figure, the sonar array is located behind the ship platform, and the radiation noise from the platform reaches the array through multiple paths. The sonar array detects the far-field plane wave signal, and the far-field plane wave signal is incident from the horizontal direction.

[0043] figure 1 Among them, x, y, and z correspond to three different axes respectively, d represents the element spacing of the sonar array, L is the distance between the platform radiation noise and the first element of the array, h 1 is the depth of platform radiation noise, h 2 is the depth of the sonar array.

[0044]The iterative algorithm based on the response weighting criterion is as follows:

[0045] Step 1: Let iteration count k=1.

[0046] Discretize the far-field plane wave signal detection area of ​...

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Abstract

The invention belongs to the technical field of underwater acoustic detection, relates to a towed line array sonar signal processing technology, and discloses a weighted airspace processing towed line array sonar platform radiation noise zero response suppression method. According to the invention, an optimal spatial matrix filter is designed by utilizing a plane wave array manifold, a platform radiation noise copy vector and a weighting coefficient matrix, and the effect of response equalization of the spatial matrix filter to each azimuth of a far-field plane wave signal under the condition of zero response constraint to platform radiation noise is realized in a way of iterating the weighting coefficient matrix.

Description

technical field [0001] The invention belongs to the technical field of underwater acoustic detection, relates to a towed line array sonar signal processing technology, in particular to a weighted airspace processing towed line array sonar platform radiation noise zero-response suppression method. Background technique [0002] Target detection in the ocean mainly relies on the radiation noise of the target. Target positioning can be achieved by using towed line array sonar. The sonar hydrophone array is located hundreds to thousands of meters behind the ship or submarine and is connected by cables. Although the distance between the ship and submarine platform and the hydrophone array is relatively long, due to various conditions, the length of the cable is always limited, and the radiation noise of the platform still has a very serious impact on the hydrophone array. The forward azimuth of the towed line array sonar forms a detection blind zone, and at the same time affects ...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/10G06F17/16
CPCG06F17/10G06F17/16Y02T90/00
Inventor 韩东杨美娇李军李利贺寅魏尚飞
Owner PLA DALIAN NAVAL ACADEMY