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How to compute irfft if I have only amplitude and phase spectrum of signal? In numpy docs I've found only irfft which use fourier coefficients for this transformation.

Толкачёв Иван
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    If you have amplitude and phase, then you can compute the complex spectrum as `amp*np.exp(phase*1j)` – Eric Feb 04 '17 at 14:29

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If you have amplitude and phase vectors for a spectrum, you can convert them to a complex (IQ or Re,Im) vector by multiplying the cosine and sine of each phase value by its associated amplitude value (for each FFT bin with a non-zero amplitude, or vector-wise).

hotpaw2
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