Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Enhancement of Signal-to-noise Ratio Based on Multiplication Function for Phi-OTDR

  • Li, Meng (Key Laboratory of Operation Programming & Safety Technology of Air Traffic Management, Civil Aviation University of China) ;
  • Xiong, Xinglong (Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China) ;
  • Zhao, Yifei (Key Laboratory of Operation Programming & Safety Technology of Air Traffic Management, Civil Aviation University of China) ;
  • Ma, Yuzhao (Tianjin Key Laboratory for Advanced Signal Processing, Civil Aviation University of China)
  • Received : 2018.05.24
  • Accepted : 2018.08.01
  • Published : 2018.10.25
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Abstract

We propose a novel methodology based on the multiplication function to improve the signal-to-noise ratio (SNR) for vibration detection in a phi optical time-domain reflectometer system (phi-OTDR). The extreme-mean complementary empirical mode decomposition (ECEMD) is designed to break down the original signal into a set of inherent mode functions (IMFs). The multiplication function in terms of selected IMFs is used to determine a vibration's position. By this method, the SNR of a phi-OTDR system is enhanced by several orders of magnitude. Simulations and experiments applying the method to real data prove the validity of the proposed approach.

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References

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