Howtosignalprocessing
What is the average power of discrete periodic signal?
Power (sometimes referred to as average power)
This is equivalent to saying that the power of a periodic signal is equal to the average energy in one period in the signal. The power of a discrete-time signal x[n] is Px=limN→∞12N+1N∑n=−N|x[n]|2.
What is a discrete periodic signal?
A discrete-time signal is periodic if there is a non-zero integer p ∈ DiscreteTime such that for all n ∈ DiscreteTime, x(n + p) = x(n). Note that, somewhat counterintuitively, not all sinusoidal discrete-time signals are periodic. Consider. x(n) = cos(2π f n).
