S 2.2.4 Classification of Sequences Energy and Power Signals The average power of an aperiodic sequence is defined by n n=-K Define the energy of a sequence xn over a finite interval-K≤n≤Kas Ex =xn§2.2.4 Classification of Sequences Energy and Power Signals • The average power of an aperiodic sequence is defined by = ∑ =− + →∞ K n K K K P x n 2 2 1 1 x lim [ ] = ∑ =− K n K x K x n 2 , ε [ ] • Define the energy of a sequence x[n] over a finite interval -K≤ n ≤ K as