SNR enhancement for Φ-OTDR system based on SG filtering and double outlier detection combined with linear interpolation
In phase-sensitive optical time domain reflectometry (Φ-OTDR) sensing systems, noise can reduce the vibration positioning signal-to-noise ratio (SNR) and distort the recovered phase signal. This poses the difficulty of vibration detection. To solve this problem, a Φ-OTDR signal processing method based on Savitzky–Golay...