Research on power-law acoustic transient signal detection based on wavelet transform

Jian-hui Han; Ri-jie Yang; Wei Wang

doi:10.1117/12.773773

10 November 2007 Research on power-law acoustic transient signal detection based on wavelet transform

Jian-hui Han, Ri-jie Yang, Wei Wang

Proceedings Volume 6795, Second International Conference on Space Information Technology; 67951I (2007) https://doi.org/10.1117/12.773773
Event: Second International Conference on Spatial Information Technology, 2007, Wuhan, China

Abstract

Aiming at the characteristics of acoustic transient signal emitted from antisubmarine weapon which is being dropped into water (torpedo, aerial sonobuoy and rocket assisted depth charge etc.), such as short duration, low SNR, abruptness and instability, based on traditional power-law detector, a new method to detect acoustic transient signal is proposed. Firstly wavelet transform is used to de-noise signal, removes random spectrum components and improves SNR. Then Power- Law detector is adopted to detect transient signal. The simulation results show the method can effectively extract envelop characteristic of transient signal on the condition of low SNR. The performance of WT-Power-Law markedly outgoes that of traditional Power-Law detection method.

Citation Download Citation

Jian-hui Han, Ri-jie Yang, and Wei Wang "Research on power-law acoustic transient signal detection based on wavelet transform", Proc. SPIE 6795, Second International Conference on Space Information Technology, 67951I (10 November 2007); https://doi.org/10.1117/12.773773

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