Cable Defect Location by Using Frequency Domain Reflectometry with Synchrosqueezing Generalized S-Transform

The traditional frequency domain reflectometry technologies have made no attempt to analyze the attenuation of the measurement signal, so they are difficult to detect and locate cable defects in engineering applications. To solve the above problem, this paper proposes a defect location method using frequency domain reflectometry with synchrosqueezing generalized S-transform. Firstly, the synchrosqueezing generalized S-transform is used to convert the reflection coefficient spectrum into a measurement frequency-location distance representation of the reflected signal. The synchrosqueezing generalized S-transform process is an effective way to obtain the time-frequency characteristic of non-stationary signals like the reflection coefficient spectrum. Then, according to the attenuation of the reflected signal in the measurement frequency-location distance representation, the appropriate measurement frequency range is selected to locate the defect, which can minimize the interferences of attenuation and noise. Finally, the simulation and measurement show that the proposed method can not only accurately locate the cable defect, but also has high defect detection sensitivity.