# Normalized autocorrelation of a sum of two signals

I obtained the autocorrelation function of a sum of two signals: as

but I want to know what is the normalized autocorrelation of above equation?

That would be a scaled autocorrelation such that its maximum value, hopefully attained at $\tau=0$, has value $1$.
• You probably meant to write $\tau = 0$. It is too small an edit for me to make the change myself.. – Dilip Sarwate Aug 12 '16 at 1:40
• If you are certain about your $R_x(\tau)$ (you ought to mark its dependency on $\tau$), yes – Laurent Duval Aug 12 '16 at 5:34