Complex interpolation

calculates a complex interpolation with a user-defined number of samples and samplerate. If the samplerate is increased, zero padding is used to fill the undefined frequency range. The target values for samples and FFT are related to the corresponding impulse response of the complex spectrum. Example: if FFT=14 is used the number of lines will be 2^13+1 = 8193.

Advice: Complex interpolation is working only if magnitude and phase response are smooth. Usually, most measured frequency responses are smooth enough to perform a complex interpolation. It is not useful to calculate a complex interpolation on noise spectrums.