Development of Wireless Transmission System for Microseismicity in Complex Mountainous Area

Table 4

Signal strength test in LOS and complex mountain environments.

Transmitting power (mW)	Antenna gain (dBi)	Surface topography	Communication distance (m)	Signal strength (dBm)
100	3	Line of sight	10	−32.4
			200	−72.5
			300	−84.5
500		Line of sight	10	−26.3
			200	−65.7
			300	−77.5
1000		Line of sight	10	−22.3
			200	−60.5
			300	−71.2
100	6	Line of sight	10	−31.2
			200	−70.3
			300	−83.7
500		Line of sight	10	−25.9
			200	−65.5
			300	−77.2
1000		Line of sight	10	−21.9
			200	−60.8
			300	−71.1
100	6	Complex mountain region	10	−31.6
			200	−80.2
			300	−94.6
500		Complex mountain region	10	−26.8
			200	−76.8
			300	−86.2
1000		Complex mountain region	10	−22.7
			200	−70.3
			300	−80.2