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

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 present invention relates to a method for locating underwater targets in the technical field of underwater acoustic signal processing, in particular, to a method for locating dual array elements of underwater acoustic pulse signals based on cross-correlation. 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. 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 mostly based on the radiated noise of ships, and there are few passive positioning for various underwater acoustic pulse signals in the unknown way of transmitting signals. For the underwater acoustic pulse signal, its signal form is different from t...

AI Technical Summary

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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