Method for positioning underwater sound pulse signal by double array elements on basis of cross-correlation

An underwater acoustic pulse, double array element technology, applied in positioning, measuring devices, instruments, etc., can solve many problems and achieve the effect of good array gain and resolution performance

Inactive Publication Date: 2015-01-28
SOUTHEAST UNIV
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Problems solved by technology

However, there are few matching field positioning problems in the case of unknown transmitted signals.
Although there have been research reports on this problem, known assumptions are still made on the frequency parameters of the signal. When solving the specific solution, it is still necessary to know the frequency required for the calculation of the forward sound field

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  • Method for positioning underwater sound pulse signal by double array elements on basis of cross-correlation
  • Method for positioning underwater sound pulse signal by double array elements on basis of cross-correlation
  • Method for positioning underwater sound pulse signal by double array elements on basis of cross-correlation

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Embodiment Construction

[0076] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the accompanying drawings.

[0077] The method for locating dual-array elements based on cross-correlation underwater acoustic pulse signals of the present invention comprises the following steps:

[0078] Step 10) The dual-array element hydrophone receives the underwater acoustic pulse signal, and then performs time-frequency distribution estimation with an adaptive radial Gaussian kernel function on the frequency of the underwater acoustic pulse signal. Step 10) further includes the following steps 101)——step 104).

[0079] Step 101) For the underwater acoustic pulse signal received by the dual-array element hydrophone, determine the corresponding two-dimensional frequency offset-the ambiguity function A in the time-delay domain according to formula (1) d (m, n);

[0080] A d...

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Abstract

The invention discloses a method for positioning an underwater sound pulse signal by double array elements on the basis of cross-correlation, which comprises the following steps of: a step 10 of carrying out estimation of time-frequency distribution with a self-adaption radial gaussian kernel function on a frequency of the underwater sound pulse signal; and a step 20 of implementing positioning on the underwater sound pulse signal received by the double array elements, wherein the step 10 comprises a step 101 of determining a fuzzy function on a two-dimensional frequency-deviation-time-lag region, a step 102 of setting a total dot number of a discretized frequency deviation and a total dot number of a discretized time lag, a step 103 of converting the fuzzy function in a rectangular coordinate system into a fuzzy function in a polar coordinate system and a step 104 of a central frequency and corresponding instantaneous time of the received signal; and the step 20 comprises a step 201 of determining a searching range of a sound source, a step 202 of determining corresponding copy channel pulse response and a step 203 of implementing matching field positioning on a target. The method utilizes two vertical receiving hydrophones to implement accurate positioning on the unknown underwater sound pulse signal of a transmitted signal.

Description

technical field [0001] The invention relates to an underwater target positioning method aimed at the technical field of underwater acoustic signal processing, in particular to a method for positioning dual array elements based on cross-correlation underwater acoustic pulse signals. Background technique [0002] The underwater acoustic positioning technology plays an extremely important role in the underwater acoustic technology. It is an important and basic problem in the underwater acoustic technology, and it is also a key technology for national economic construction and national defense construction. In underwater acoustic positioning technology, passive positioning technology has always been an important research direction in underwater acoustic technology. At this stage, the underwater passive positioning technology is currently working around the radiation noise of ships, and there are few passive positioning for various underwater acoustic pulse signals in an unknown ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01S5/18
Inventor 李焜方世良安良罗昕炜
Owner SOUTHEAST UNIV
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