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Active Sonar Target Depth Estimation Method Using Echo Structure in Bottom Bounce Area
Received date: 2023-11-30
Revised date: 2024-05-17
Accepted date: 2024-05-20
Online published: 2024-06-06
The discrimination and recognition of underwater targets has been the focus of active sonar detection. The structural characteristics of the target echo arrival in the bottom bounce area are analyzed when the target depth is greater than the transmit-receive depth. A 9-path arrival structure model is established. The relationship between the time delay of the bottom reflected/ surface-bottom reflected path and the target depth is analyzed. A method is proposed to estimate the time delay by searching for target arrival structure in bottom bounce area, and to estimate the target depth by using the relationship between the time delay and the target depth. The algorithm is verified based on explosion sound source data. The estimated depth of the underwater target obtained by a single hydrophone is in good agreement with the real target depth. The depth estimation of 20 targets within the range of 2.0—25.6 km is conducted, among which the depth estimation error of 17 batches is less than 10 m, and the average depth estimation error of 20 batches is approximately 7 m.
XIE Liang , WANG Lujun , WANG Zhuoran . Active Sonar Target Depth Estimation Method Using Echo Structure in Bottom Bounce Area[J]. Journal of Shanghai Jiaotong University, 2025 , 59(12) : 1847 -1854 . DOI: 10.16183/j.cnki.jsjtu.2023.605
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