Acoustic vector sensor array adaptive beam forming method and system and storage medium

Abstract

The invention relates to an acoustic vector sensor array adaptive beam forming method and system, computer equipment and a storage medium. The method comprises the steps: through an acoustic vector sensor array, receiving a far-field narrow-band signal in an underwater environment noise field; calculating a covariance matrix according to the received far-field narrowband signal; performing characteristic decomposition on the covariance matrix to obtain characteristic values and characteristic vectors; estimating the signal subspace dimension of the covariance matrix as p; adopting feature vectors corresponding to the first p large feature values to form a signal subspace matrix; projecting a vector sensor array guide vector at an expected signal angle theta 0 to the signal subspace to obtain a projected guide vector; constructing a blocking matrix according to the projected guide vector; and calculating a beam forming weight vector according to the blocking matrix. According to the invention, adaptive beam forming is carried out by using the acoustic vector sensor, noise and interference are suppressed, and the signal to interference and noise ratio is improved; and the method is mainly applied to 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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