Hi all,

I wonder if there is an optimized IFFT producing a real output, as this function will be twice as fast compared to the already implemented ifft_fr32().

The only thing that needs to be done is calculating the trigonometric recombination prior to the actual ifft, as with the rfft_fr32().

BR,

Raimund Eigner

Hi,

The VisualDSP++ DSP runtime library for Blackfin does currently not support such a function. If performance is key, the ifftf_fr32 function will be your best bet. If you are thinking about implementing such an inverse Fourier transform function yourself, the implementation of the rfftf_fr32.asm uses a trigonometric recombination which you could use as a starting point.

Andreas