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MATLAB Mathematics - SERC - Index of

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3 Fast Fourier Transform (FFT)<br />

Function Summary<br />

<strong>MATLAB</strong> provides a collection <strong>of</strong> functions for computing and working with<br />

Fourier transforms.<br />

FFT Function Summary<br />

Function<br />

fft<br />

fft2<br />

fftn<br />

ifft<br />

ifft2<br />

ifftn<br />

abs<br />

angle<br />

unwrap<br />

fftshift<br />

cplxpair<br />

nextpow2<br />

Description<br />

Discrete Fourier transform.<br />

Two-dimensional discrete Fourier transform.<br />

N-dimensional discrete Fourier transform.<br />

Inverse discrete Fourier transform.<br />

Two-dimensional inverse discrete Fourier transform.<br />

N-dimensional inverse discrete Fourier transform.<br />

Magnitude.<br />

Phase angle.<br />

Unwrap phase angle in radians.<br />

Move zeroth lag to center <strong>of</strong> spectrum.<br />

Sort numbers into complex conjugate pairs.<br />

Next higher power <strong>of</strong> two.<br />

3-10

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