Assignment:
Consider a radio link of length d = 100 km. The transmit and receive antenna gains are, respectively, (gAnt,Tx) dB = 3dB and (gAnt,Rc)dB = 5dB, and the noise temperature of the receive antenna is TS = 250 K. The transmitted signal has bandwidth B = 4 kHz centered at frequency f0 = 1 GHz. The output of the receive antenna feeds a receiver with noise figure (FR)dB = 6 dB.
a) Determine the required transmitted power (in dBm) that guarantees an output SNR of 30 dB.
b) By considering that all parameters remain unchanged (including SNR and transmitted power) what noise figure FR is required if the length of the link is increased to d = 150 km?