Table 2.

The phi-OTDR parameters used for the experiments.

Parameter	Value
ADC	50 MHz (the equivalent of 2 m spatial discretization)
Pulse duration	100 ns
Spatial resolution	10 m
Impact frequencies	38 Hz, 55 Hz, and 101 Hz
Distance from the vibration source to the cable	0 m (over the cable), 2 m, and 4 m