6.8.2. In each indicated change of a system below, determine the corresponding effect on the
communication distance. Answers should have the form “d increases by a factor of…” or
“d decreases by a factor of …”.
(a) The transmitter power changes from 2 mW to 5 mW.
(b) The system effective temperature changes from 400 K to 700 K.
(c) The required (Eb/N0) increases by 2 dB.
(d) The gain of the receiving antenna increases from 3 to 12, but at the same time, due
to antenna pointing errors, other losses increase by 2 dB