Visualization 5.avi

Visualization 5 of the supplementary materials for Distributed fiber sparse-wideband vibration sensing by sub-Nyquist additive random sampling. The signal reconstruction process. Upper figure: the PSD spectra of the sNRS signal residual. Black dots, the reconstructed frequency components; Red line, half of the maximum frequency component amplitude. Red dashed line, 1.5 times of the 0.99 quantile of the signal amplitude. Middle figure: Lorentzian curve fitting of the frequency components. Blue line, NDFT of the signal; Green line, data used in Lorentzian curve fitting; Light blue line, NDFT of the signal residual; Black dot, fitting result of the frequency component. Red line, half of the maximum frequency component amplitude. Lower figure: Blue line, reconstructed signal; Orange dots, NUS sampling data.