Acoustic vector sensor array adaptive beamforming method, system and storage medium

Abstract

The invention relates to an acoustic vector sensor array adaptive beamforming method, system, computer equipment and storage medium, which comprises: the acoustic vector sensor array receives a far-field narrowband signal in an underwater environmental noise field; according to the received far-field narrowband signal , calculate the covariance matrix; perform eigendecomposition on the covariance matrix to obtain n eigenvalues ​​and eigenvectors; estimate the signal subspace dimension of the covariance matrix as p; use the eigenvectors corresponding to the first p large eigenvalues ​​to form the signal subspace Matrix; put the desired signal angle θ 0 The steering vector of the vector sensor array at is projected onto the signal subspace to obtain the projected steering vector; the blocking matrix is ​​constructed according to the projected steering vector; the beamforming weight vector is calculated according to the blocking matrix. The invention utilizes an acoustic vector sensor to form an adaptive beam, suppresses noise and interference, and improves the signal-to-interference-noise ratio; it is mainly used in passive detection of underwater weak targets.

Description

technical field [0001] The invention relates to the technical field of sensor signal processing, in particular to an acoustic vector sensor array adaptive beamforming method, system, computer equipment and storage medium. Background technique [0002] The sound pressure channel and the vibration velocity channel of the acoustic vector sensor can be co-located to obtain the sound pressure and vibration velocity information of the sound field at the same time, which provides more favorable tools and more information for underwater target detection. When the acoustic vector sensor is applied underwater, environmental noise is the main source of background noise. Sun Guiqing et al. have made a detailed theoretical analysis and experimental verification of the characteristics of underwater environmental noise (Sun Guiqing, Yang Desen, Shi Shengguo. Based on the vector hydrophone The spatial correlation coefficient of sound pressure and particle velocity [J]. Acoustica Sinica. 200...

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Problems solved by technology

[0003] Aiming at the problem that the underwater complex background noise leads to the performance degradation of the existing GSC beamforming technology, the purpose of the present invention is to provide an acoustic vector sensor array adaptive beamforming method, system, computer equipment and storage medium, which can estimate the actual signal subspace Dimensionality, does not need to know the number of target signals and interference, can still form the main lobe in the desired direction when the signal-to-noise ratio is low, maintain zero trapping in the interference direction, and have a high signal-to-interference-noise ratio gain

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