Learn more about System Identification Toolbox

ifft - Transform iddata objects from frequency to time domain

Syntax

dat = ifft(Datf)

Description

ifft transforms a frequency-domain iddata object to the time domain. It requires the frequencies on Datf to be equally spaced from frequency 0 to the Nyquist frequency. This means that if there are N frequencies in Datf and the time sampling interval is Ts, then

Datf.Frequency = [0:df:F], where F is pi/Ts if N is odd and F = pi/Ts*(1-1/N) if N is even.

See Also

iddata
fft

idss

impulse

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