Brillouin Scattering Spectrum Analysis Based on Auto-Regressive Spectral Estimation
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Auto-regressive (AR) spectral estimation technology is proposed to analyze the Brillouin scattering spectrum in Brillouin optical time-domain refelectometry. It shows that AR based method can reliably estimate the Brillouin frequency shift with an accuracy much better than fast Fourier transform (FFT) based methods provided the data length is not too short. It enables about 3 times improvement over FFT at a moderate spatial resolution.
KeywordsBrillouin optical time-domain reflectometry (BOTDR) auto-regressive (AR) model spectral estimation distributed fiber-optic sensing
This work was supported by the National Natural Science Foundation of China (Grant Nos. 11474133 and 61235005) and Science and Technology Program of Guangzhou (No. 201707010338).
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