期刊名称：IAENG International Journal of Computer Science
印刷版ISSN：1819-656X
电子版ISSN：1819-9224
出版年度：2020
卷号：47
期号：2
语种：English
出版社：IAENG - International Association of Engineers
摘要：To overcome the limitation of the Hilbert transform, this paper proposes a method to extract an envelope of underwater acoustic echoes that uses the wavelet and Hilbert transforms. First, the Hilbert transform is used to extract the envelopes and the wavelet transform is applied to denoise them. A mathematical model of the entire method is established in the process. Second, a test bed for an underwater experiment featuring a data processing system, the acquisition of the echo signal, and feature extraction are described. Finally, underwater acoustic experiments are carried out, and the results show that the proposed approach can extract the echo envelope accurately and can efficiently eliminate interference from random noise. The influence of different wavelet mother functions, the threshold value, and threshold denoising functions is also discussed.
