Problem
Consider a 10-watt transmitter communicating with a mobile receiver having a sensitivity of -100 dBm.
Assume that the receiver antenna height is 2 m, and the transmitter and receiver antenna gains are 1 dB. What height of base station antenna would be necessary to provide a service area of radius 10 km? If the receiver is mobile, and the maximum radiated power is restricted by regulation ro be 10 watts or less, what realistic options are there for increasing the service area?