Optimization of Wireless Communication Coverage in Underground Tunnels Based on Zone Division

Table 5

Experimental settings: locations of antennas.

Antenna	Position of C	Position of CC	Position of CO	Position of WC	Position of WW
Measurements in wide tunnel
Sending antenna	(0, 0.94, z1)	—	—	—	—
Receiving antenna	(−0.28,0.89,0)	(−0.04,2.40,0)	(−1.62,1.90,0)	(−2.30,0.90,0)	(−2.45, 0.02,0)
Measurements in narrow tunnel
Sending antenna	(0, 0.46, z1)
Receiving antenna	(0,0.46,0)	(0,1.29,0)	(0.89,1.06,0)	(−1.20,0.46,0)	(−1.20, 0,0)