基于互质位置非同步测量的低频声源成像方法

doi:10.11959/j.issn.1000-436x.2023166

Abstract

Abstract:

In order to solve the problem that the acoustic imaging resolution was low under the condition of low frequency and low SNR due to the limited microphone array aperture and element density, a high resolution imaging method of low frequency and low SNR sound source was proposed based on the non-synchronous measurement of the coprime position.Firstly, the acoustic signal was received at the coprime position and the missing cross-spectrum matrix was calculated by the mobile prototype array.Then, the improved accelerated proximity gradient algorithm was used to complete the missing cross-spectrum matrix, and the complete cross-spectrum matrix was vectorized.Finally, the virtual array signal model was established and solved.The simulation results demonstrate that the proposed method has lower positioning error, higher imaging resolution, and better robustness and noise immunity than the previous methods under the condition of low frequency and low SNR.

Key words: acoustic imaging, coprime position, non-synchronous measurement, matrix completion

CLC Number:

TN912.3

Juan WEI, Yutao HE, Fangli NING. Low frequency acoustic source imaging method based on coprime position non-synchronous measurement[J]. Journal on Communications, 2023, 44(9): 93-103.

Figures/Tables 12

References 26

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