Power Spectrum

This definition page has been automatically generated. You can help ExoDictionary by expanding, updating, or correcting it.

This autostub has not yet had its initial copyediting proof and may contain significant formatting and even factual errors. You can improve Exodictionary by cleaning up the page markup and verifying that the definition is correct and then removing this tag.

This autostub has not yet had its initial categorization proof and may be categorized incorrectly. You can improve Exodictionary by removing inappropriate categories and then removing this tag.

Power Spectrum

</dt>
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

Missing Image:img src="SP7_p_files/powspec.gif"

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