You can see my system's diagram as shown below
At output,two different input signals are sited in each ($\frac{H}{3}$) position $(w_2=w_1+ \frac{H}{3})$ and if output power spectral density equation is included different sentences such as
- Dc term reaction of input noise to itself.
- reaction of inputsignal(w1 or w2) to itself.
- reaction of input signals(w1 and w2) to themselves
- reaction of input signal(w1 or w2) and input noise
- reaction of input signals(w1 and w2) and input noise to themselves.
How can obtain input and output SNR?