Sparse array method for vector hydrophones based on compressed sensing theory

Abstract

The invention provides a sparse array method for vector hydrophones based on the compressed sensing theory. The method comprises the following steps of: (1) determining functions of the directivity ofa vector hydrophone combination and the directivity of a composite array; (2) constructing a target directional beam of a vector hydrophone array; (3) constructing an array problem model of a sparsevector hydrophone; and (4) reconstructing the vector hydrophone array sparsely. The method is based on the sparse array mechanism of the vector hydrophone array, combines with the convex optimizationand the compressed sensing theory, uses the sensing relationship between the sparse array position and the target array beam, and uses the non-uniform spacing array to reconstruct the target beam, toobtain accurate sparse array results. According to the sparse array method for the vector hydrophones based on the compressed sensing theory, the method can set the number of hydrophones in the desired sparse vector array independently according to the requirements of the system performance, and can control the complexity of the system accurately. The vector sparse array method adopts the orthogonal matching pursuit algorithm; the obtained sparse approximation result is fixed; and the method does not need to be debugged for multiple times, thereby saving a lot of algorithm adjustment time; andthe method is more aligned with the practical application of the engineering.

Description

technical field [0001] The invention belongs to the technical field of sonar, and more specifically relates to a sparse array method of vector hydrophones based on compressive sensing theory. Background technique [0002] As a new type of underwater acoustic measurement sensor, the vector hydrophone is structurally composed of a traditional non-directional sound pressure sensor and a dipole directional vibration velocity sensor, which can measure sound pressure and vibration velocity simultaneously and at the same point The information fundamentally solves the problem of "left and right sides blurring", and is widely used in underwater acoustic warning sonar, towed line array sonar, broadside array conformal sonar, multi-base sonar and other fields. [0003] Sparse array refers to an array in which array elements are distributed in a sparse form obtained by removing part of the array elements from the traditional densely arranged full array on the basis of satisfying the arr...

AI Technical Summary

Problems solved by technology

[0005] The existing sparse array technology usually uses a random optimization algorithm to find the global optimal solution of such problems, which is easy to approach the global optimal solution, but it takes a lot of time to adjust during the implementation of the algorithm, which is not conducive to practical engineering applications

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