An OPGW ice-coating monitoring scheme based on BOTDR temperature measurement is proposed and demonstrated. The scheme is applied to actual transmission line. The temperature measurement accuracy is about ±1℃.
A novel φ-OTDR system based on single-sideband signal in digital domain is proposed to demodulate the amplitude and phase of the Rayleigh backscattering signal directly with a signal to noise ratio of 41.1 dB.
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