A Near-field Acoustic Image Measurement Method Based on Compressed Sensing in Complex Domain [复域压缩感知近场声图测量方法]

作者：Chen X.; Zheng E.^*; Li Y.; Yang H.; Zhou Q.

来源：Acta Armamentarii, 2021, 42(8): 1735-1743.

DOI：10.3969/j.issn.1000-1093.2021.08.018

• Array signal processing
• Compressed sensing in complex domain
• Near-field acoustic image measurement
• Sensing matrix

In order to solve the performance degradation problem of near-field acoustic image measurement method based on compressed sensing in frequency domain, the time delay compensation and correlation are processed based on the relationship between phase shift and time delay in array signal processing according to the near-field scanning position in the complex domain. A near-field acoustic image measurement model of sensing matrix in complex domain is established. Taking the numerical simulation data and the data measured in a near-field target location experiment as an example, the processed results of the proposed model and the frequency domain compressed sensing model are compared. The results show that, compared with frequency domain compressed sensing, the tolerance of lowest signal-to-noise ratio of this method is improved nearly 10lgM dB (where M is the channel number of array) by changing the construction way of sensing matrix and observation sequence, and the ability of near-field acoustic image measurement is improved.

• 单位
  哈尔滨工程大学; 中国科学院大学