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- W3100542943 endingPage "2022" @default.
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- W3100542943 abstract "The round-trip time of the light pulse limits the maximum detectable vibration frequency response range of phase-sensitive optical time domain reflectometry (ϕ-OTDR). Unlike the uniform laser pulse interval in conventional ϕ-OTDR, we randomly modulate the pulse interval so that an equivalent sub-Nyquist additive random sampling (sNARS) is realized for every sensing point of the long interrogation fiber. For a ϕ-OTDR system with 10 km sensing length, the sNARS method is optimized by theoretical analysis and Monte Carlo simulation, and the experimental results verify that a wideband sparse signal can be identified and reconstructed. Such a method can broaden the vibration frequency response range of ϕ-OTDR, which is of great significance in sparse-wideband-frequency vibration signal detection." @default.
- W3100542943 created "2020-11-23" @default.
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- W3100542943 date "2018-04-20" @default.
- W3100542943 modified "2023-10-18" @default.
- W3100542943 title "Distributed fiber sparse-wideband vibration sensing by sub-Nyquist additive random sampling" @default.
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- W3100542943 doi "https://doi.org/10.1364/ol.43.002022" @default.
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