MUSIC direction finding method based on underwater information system cross array

By employing a MUSIC direction finding method based on an underwater information system cross array, combined with various signal processing techniques, the accuracy problem of underwater target acoustic signal direction finding under low signal-to-noise ratio conditions was solved, achieving high-precision underwater target direction finding.

CN116338568BActive Publication Date: 2026-06-23THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE 54TH RESEARCH INSTITUTE OF CHINA ELECTRONICS TECHNOLOGY GROUP CORPORATION
Filing Date
2023-02-15
Publication Date
2026-06-23

AI Technical Summary

Technical Problem

There is a lack of effective underwater acoustic direction finding methods in the existing technology, especially under low signal-to-noise ratio conditions, it is difficult to achieve high-precision underwater target acoustic signal direction finding.

Method used

The MUSIC direction finding method based on the cross array of underwater information systems is adopted. It combines the average periodic diagram time accumulation, filtering, signal detection and time sliding window technology, and realizes the direction finding of underwater target acoustic signals through Fourier transform, covariance matrix decomposition and spatial spectrum data accumulation.

Benefits of technology

It improves the direction finding accuracy under low signal-to-noise ratio conditions, reduces the impact of array configuration on the direction finding algorithm, and enhances the signal-to-noise ratio of signal reception and the accuracy of direction finding processing.

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Abstract

The application relates to a MUSIC direction-finding method based on an underwater information system cross array, and belongs to the technical field of underwater acoustic direction finding. In view of the problems of low signal-to-noise ratio and low direction-finding precision of underwater signal direction finding, the application provides a MUSIC direction-finding method based on an underwater information system cross array. The method is based on a MUSIC algorithm, frequency extraction and spatial spectrum accumulation, a cross array is used to perform direction-finding processing on a signal, the relative position relationship between the signal and the cross array is obtained, a suitable linear array in the cross array is selected to perform direction-finding processing on the signal, and the direction finding of an underwater target acoustic signal under low signal-to-noise ratio can be effectively realized.
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