Compute the inverse fft of a signal whose spectrum has Hermitian symmetry.
a : array_like
n : int, optional
axis : int, optional
These 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 hermite_fft 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.