UACE2017 Proceedings: Underwater Acoustic Transient Noise Measurement based on CCWEEMDAN and Power-Law Detector

• Session:
  Underwater Noise - Modelling and Measurements
• Paper:
  Underwater Acoustic Transient Noise Measurement based on CCWEEMDAN and Power-Law Detector
• Author(s):
  Jiangqiao Li, Yue Pan, Huangfu Li, Xiaoliang Zhang
• Abstract:
  Acoustic transient noise measurement is important to detect and analyse the sound source. According to traits of underwater acoustic transient signal, a new measurement method of underwater acoustic transient noise based on complete complementary wavelet ensemble empirical mode decomposition with adaptive noise(CCWEEMDAN)and Power-Law was proposed in the paper. Firstly,A new noise-assisted signal decomposition algorithm named CCWEEMDAN was presented based on CEEMD. Then, the CCWEEMDAN method was employed to decompose the noise containing transient signal into the Intrinsic Mode Function(IMF) domain,other noise was suppressed by adaptive ensemble empirical mode decomposition, this method achieved better spectral separation of modes and with fewer screening iterations and extremely low computational cost. In addition, in order to acquire the starting point and lagging edge of transients signal, Power-Law detector was applied to detect the certain order of Intrinsic Mode Function containing short-term burst signal. The Monte Carlo simulation examples of typical underwater transient signal and sea trial data processing results show that the detector which based on CCWEEMDAN and Power-Law can effectively suppress the background interference without a priori knowledge, extract transient signal with the SNR gain higher than the conventional Power-Law detectors, and reduce false alarm probability in a certain extent.\nkey words : underwater acoustic countermeasure ; underwater acoustic transient signals detecting; CCWEEMDAN; Power-Law detector\n
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Contact details

• Contact person:
  Mr Jiangqiao Li
• e-mail:
  
• Affiliation:
  National Key Laboratory of Science and Technology on Underwater Acoustic Antagonizing, Systems Engineering Research Institute
• Country:
  China