Hilbert–Huang Transform Time-Frequency Analysis in $\phi $ -OTDR Distributed Sensor
- 19 September 2014
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Photonics Technology Letters
- Vol. 26 (23), 2403-2406
- https://doi.org/10.1109/lpt.2014.2358262
Abstract
Time-frequency analysis is a practical method to analyze the characteristics of vibration signals. We introduce the Hilbert-Huang transform (HHT) to the phase-sensitive optical time-domain reflectometer sensor system for time-frequency analysis. The Hilbert spectral analysis makes the instantaneous frequency meaningful, and acquires the high frequency resolution. Compared with other time-frequency analysis methods, such as the short-time Fourier transform and the continuous wavelet transform, HHT presents high frequency resolution for both stationary and nonstationary signals, and with much less time consuming.Keywords
Funding Information
- National Scientific Supporting Program of China (2012BAH34B03)
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