numpy.fft.ihfft

numpy.fft.ihfft(a, n=None, axis=-1)

Compute the inverse FFT of a signal whose spectrum has Hermitian symmetry.

Parameters :

a : array_like

Input array.

n : int, optional

Length of the inverse FFT.

axis : int, optional

Axis over which to compute the inverse FFT, assuming Hermitian symmetry of the spectrum. Default is the last axis.

Returns :

out : ndarray

The transformed input.

See also

hfft, irfft

Notes

hfft/ihfft are a pair analogous to rfft/irfft, but for the opposite case: here the signal is real in the frequency domain and has Hermite symmetry in the time domain. So here it’s hfft for which you must supply the length of the result if it is to be odd: ihfft(hfft(a), len(a)) == a, within numerical accuracy.