We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Envelope Extraction of Underwater Acoustic Echo Using Wavelet and Hilbert Transforms.
- Authors
Chun-xue Shi; Zhi-jin Zhou; Hai-ming Zhao; Mu-rong Zhou
- Abstract
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.
- Subjects
HILBERT transform; WAVELET transforms; ECHO; INFORMATION storage &; retrieval systems; ACOUSTICS; FEATURE extraction
- Publication
IAENG International Journal of Computer Science, 2020, Vol 47, Issue 2, p207
- ISSN
1819-656X
- Publication type
Article