Influence of Amplitude-phase Error on MVDR Beamforming of Volume Array

Volume array is a kind of three-dimensional array composed of multiple hydrophones, which can increase the aperture of the receiving array of the submarine target and obtain a large spatial gain. In engineering, it is often made into an array with the function of folding and expanding for dropping s...

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Published in水下无人系统学报 Vol. 32; no. 1; pp. 139 - 146
Main Authors Yan HUANG, Junsheng JIAO, Shixu GUO, Peng ZHAO
Format Journal Article
LanguageChinese
Published Science Press (China) 01.02.2024
Subjects
amplitude-phase error
array gain
azimuth estimation accuracy
hydrophone
output signal-to noise ratio
volume array
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Summary:Volume array is a kind of three-dimensional array composed of multiple hydrophones, which can increase the aperture of the receiving array of the submarine target and obtain a large spatial gain. In engineering, it is often made into an array with the function of folding and expanding for dropping sonar at low frequency. Because the parameters and amplitude gain of the devices in each hydrophone channel are inconsistent, there are amplitude-phase errors between the signals received by each element of the volume array. In this study, a double-ring volume array model with amplitude-phase errors was established, and the effects of the amplitude-phase errors on the covariance matrix, as well as the output signal-to-noise ratio(SNR), array gain, and azimuth estimation accuracy of the minimum variance distortionless response(MVDR) beamformers, were statistically analyzed. The computer simulation results show that the existence of array amplitude-phase error will reduce the output SNR and array gain of MVDR beamform
ISSN:2096-3920
DOI:10.11993/j.issn.2096-3920.2023-0077