# calculate SNR of two signals with power spectral density

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

1. Dc term reaction of input noise to itself.
2. reaction of inputsignal(w1 or w2) to itself.
3. reaction of input signals(w1 and w2) to themselves
4. reaction of input signal(w1 or w2) and input noise
5. reaction of input signals(w1 and w2) and input noise to themselves.

How can obtain input and output SNR?