Power Spectrum

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Power Spectrum

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The square of the amplitude of the (complex) Fourier coefficient of a given periodic function. Thus if f(t) is periodic with period T , its Fourier coefficients are

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where ω = 2π/T and the power spectrum of f(t) is |F(n)|<xup>2. Here n take integral values and the spectrum is discrete. The total energy of the periodic function is infinite, but the power, or energy per unit period, is finite. [[/a>|/a> ]]</dd>

References

This article is based on NASA's Dictionary of Technical Terms for Aerospace Use