Operations on sequence Discrete-Time Signals and Systems--Digital Signal Processing 8.Signal energy 6:=∑x(n)x(n)=∑Ix(n)P se sum(x .conj(x));or se sum(abs(x).^2); 9.Signal power 1-1 P=∑1x(n)P N m=0 上游充通大粤Operations on sequence Discrete-Time Signals and Systems —— Digital Signal Processing 8. Signal energy se = sum(x .* conj(x)); or se = sum(abs(x) .^ 2); 9. Signal power         n n x x n x n x n * 2  ( ) ( ) | ( )|     1 0 2 | ( ) | 1 N n x x n N P