I'm trying to determine the strength of a complex filtered signal from
a USRP board; that is, I take the data from the USRP board and I
lowpass filter it, and now I'd like to either fft then integrate the
complex output to get the signal energy, or just straight away do
a sum on the sequence (a la Parseval's theorem). Which
method would be easier? Are there any blocks that do this
already?