Underwater DOA Estimation Method and Device Based on Angle Adjustable Non-uniform Linear Array

A technology of direction of arrival estimation and uniform linear array, which is applied to systems for determining direction or offset, direction finders using ultrasonic/sonic/infrasonic waves, etc. The effect of high accuracy and improved angular resolution
CN108519576BActive Publication Date: 2021-07-20SOUTH CHINA UNIV OF TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SOUTH CHINA UNIV OF TECH
Publication Date
2021-07-20

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Abstract

The invention discloses a method and device for estimating the underwater direction of arrival based on an adjustable angle non-uniform line array. A two-dimensional angle adjustable non-uniform line array is used as a receiving array and applied to two line arrays respectively. ESPRIT algorithm, and then according to the angle relationship between the two linear arrays, the final result has nothing to do with the underwater sound velocity, which realizes the improvement of the traditional ESPRIT algorithm. At the same time, due to the use of the line array with adjustable angle, the angle between the two line arrays can be changed for multiple measurements, so as to better eliminate the estimation error. The invention combines the advantages of the angle-adjustable line array and the non-uniform line array, has high estimation accuracy and strong practicability.
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Description

technical field

[0001] The invention relates to the technical field of target positioning, in particular to an underwater direction-of-arrival estimation method and device based on an adjustable angle-adjustable non-uniform linear array. Background technique

[0002] Array signal processing technology has been widely used in many fields, and one of the basic problems of array signal processing is the direction of arrival (DOA estimation) of space signals. The method of placing sensor arrays on the water surface and using array signal processing technology to estimate the orientation of underwater targets is underwater DOA estimation. The existing underwater DOA estimation methods mainly include MUSIC algorithm and ESPRIT algorithm. They both belong to the characteristic subspace algorithm. This type of algorithm divides the received data into two mutually orthogonal subspaces through the mathematical decomposition of the array received data (such as singular value decomposi...

Claims

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