Frequency spectrum

In mathematics, physics and signal processing, the frequency spectrum is a representation of a signal or other function in terms of frequency (in the "frequency domain"). It is the projection of the function onto a set of sinusoidal basis functions. It can be found from the result of a Fourier-related transform.

Related Topics:
Mathematics - Physics - Signal processing - Signal - Function - Frequency - Frequency domain - Projection - Sinusoid - Basis function - Fourier-related transform

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A frequency spectrum contains both amplitude and phase information. The power spectrum describes how much of the "energy" (loosely defined) of the function or signal lies in any given frequency band, without regard for the phase.

Related Topics:
Amplitude - Phase - Power spectrum

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