In an FM line of sight link , the frequency is 6 GHz and the beamwidth = 27 MHz the transmitting and receiving antennas have a gain of 33 dB , the receiving antenna is 40 Km apart from the transmitting station :
i- find the required transmitter power in order to secure a C/N of 40 dB given that the noise temperature is 700°K and the receiver noise figure=9 dB, you need to account for a 3dB cable loss and other losses on the receiving side.
ii- find the antenna heights assuming smooth earth in between.
iii- given that the FM thershold C/N = 10dB , find the probability of fading assuming normal terrain and weather.