5473ca8c581e2a3f28523bd8

1 Answer
Apr 12, 2016

You need to relate the energy to autocorrelation:
Energy:
#E = int_0^A |f(t)|^2 dt#
Autocorrelation is the convolution of the signal onto itself.
#R(tau) = int_0^A f(t)f(t-tau) dt#

So Autocorrelation defines signal energy at zero shift, i.e.:
#E = R(0) = int f(t)[f(t-tau)]_(tau=0) dt=int f^2(t) dt#.

So the answer is yes you do. Realistically if you know the structure #f(t)# then you can calculate the Autocorrelation by convolving with itself...

Hope this helps...
Best regards