Signal Energy and Power
In a similar way, we can compute the signal energy
(sum of squared moduli) using any of the following constructs:
Ex = x(:)' * x(:) Ex = sum(conj(x(:)) .* x(:)) Ex = sum(abs(x(:)).^2)The average power (energy per sample) is similarly Px = Ex/N. The
norm is similarly xL2 = sqrt(Ex) (same result as
xL2 = norm(x)). The 
norm is given by xL1 =
sum(abs(x)) or by xL1 = norm(x,1). The infinity-norm
(Chebyshev norm) is computed as xLInf = max(abs(x)) or
xLInf = norm(x,Inf). In general, 
norm is computed by
norm(x,p), with p=2 being the default case.
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Projection Example 1
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Two's-Complement, Integer Fixed-Point Numbers
