Method for positioning water sound pulse signal matching field based on frequency domain least squares method

A least squares method and underwater acoustic pulse technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of limited prior information of transmitted signals, increased difficulty of positioning, and inability to accurately locate targets

Inactive Publication Date: 2013-04-17
SOUTHEAST UNIV
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Problems solved by technology

However, in passive positioning technology, due to the limited prior information of the transmitted signal, it often needs to be carried out under the condition that the transmitted signal is unknown, which further increases the difficulty of positioning.
In addition, when the number of elements in the traditional matching field processing technology decreases, the fuzzy surface sidelobes output by the positioning result are high, and the target cannot be accurately positioned, which has also become a bottleneck that plagues this technology.

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  • Method for positioning water sound pulse signal matching field based on frequency domain least squares method
  • Method for positioning water sound pulse signal matching field based on frequency domain least squares method
  • Method for positioning water sound pulse signal matching field based on frequency domain least squares method

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Embodiment Construction

[0035] 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.

[0036] A kind of positioning method of the underwater acoustic pulse signal matching field based on the frequency domain least squares method of the present invention comprises the following steps:

[0037] Step 10) For the dual-array element hydrophone, the sound field propagation model is used to measure and calculate the sound field. Step 10) specifically includes step 101) and step 102).

[0038]Step 101) Determine the search range of the sound source: within the observation range, divide the observation range into grid points to obtain the grid area (R, Z), where R represents the distance range on the search grid area, and Z represents the search range The depth range on the grid area.

[0039] Step 102) for the grid area (R, Z) divided in step 101), use the Kraken sound field...

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Abstract

The invention discloses a method for positioning a water sound pulse signal matching field based on a frequency domain least squares method. The method comprises the following steps of 10) measuring and calculating a sound field of a double-array element hydrophone by using a sound field propagation model, i.e. determining a search range of a sound source, within an observation range, performing grid point division on the observation range, obtaining grid areas, and for each grid area, by using the sound field propagation model and an ocean environment parameter serving as the input value of the sound field propagation model, measuring and calculating through the sound field propagation model to obtain channel pulse response, which is generated by excitation on each hydrophone, of the sound source in each grid area; and 20) according to the water sound pulse signal received by the double-array element hydrophone and the measured and calculated channel pulse response through the sound field propagation model, performing matching field positioning on a target. With the adoption of the positioning method, the water sound pulse signal can be still positioned under the condition that the prior information of a transmitting signal is not enough, and the problems caused in a traditional multi-sensor array processing way are overcome.

Description

technical field [0001] The present invention relates to an underwater target positioning method aimed at the technical field of underwater acoustic signal processing, in particular to a positioning method based on a matching field of an underwater acoustic pulse signal based on a frequency domain least square method. 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 a...

Claims

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Application Information

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