Fast and robust post-processing algorithm for STFT-BOTDR

We propose a post-processing algorithm for estimating the Brillouin frequency shift (BFS) to meet the high-performance demands of Short-Time Fourier Transform-based Brillouin Optical Time Domain Reflectometry (STFT-BOTDR). The methodology integrates few-point STFT, post-interpolation, and fitting window correction techniques, achieving simultaneously a high accuracy, a high precision, and a rapid processing time.