The amplitude of the FFT is related to the number of points in the time-domain signal . Use the following equation to compute the amplitude and phase versus frequency from the FFT.
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[‚fu̇r·ē‚ā ‚spek·trəm] (physics) A plot of the magnitude and phase of the Fourier transform of a function .
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The shape of the amplitude spectrum is determined by the function sin( f ) f π τ π τ . the single rectangular pulse of width τ contains all frequencies between 0 and ∞. the relative amplitudes (ignoring the overall amplitude factor) of these frequencies is given by the function sin( f ) f π τ π τ .
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The amplitude spectrum simply gives amplitude at each frequency . The phase spectrum simply gives the phase at each frequency (Figure 2.20).
Read moreWhat is amplitude and phase spectrum of Fourier series?
Two-Sided Spectra The exponential Fourier series representation of a periodic function x(t) has amplitude coefficients Cn which are complex and can be represented by magnitude and phase. Hence, we can plot the amplitude spectrum (|Cn| versus ω) and the phase spectrum (∠Cnversusω) .
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amplitude spectrum specifies the amplitude of signal components as a function of component . frequency . The phase spectrum specifies the phase of signal components as a function of. component frequency. This phase is measured with respect to a cosine reference.
Read moreWhat is amplitude frequency spectrum?
Frequency Domain The amplitude spectrum simply gives amplitude at each frequency . The phase spectrum simply gives the phase at each frequency (Figure 2.20). Figure 2.20. (a) Amplitude spectra.
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