#### 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