How to implement Signal transmitted by RF source
I assume this would be as follows: 

s*exp(j*2*pi*f*n)


Where:

n: sample index 
s: baseband signal, magnitude and phase for each sample 
f: carrier frequency in cycles/sample 

Note how the carrier as a discrete signal is given in cycles per sample. This is the normalized frequency and is related to the desired frequency $F$ in Hz by dividing by the sampling rate $f_s$ as follows:

$f = F/f_s$