ippsFFTFwd_CToC_32fc(pSrc,pDst,pFFTSpec,pFFTWorkBuf);

 For a basis I followed an example from this links:

http://software.intel.com/en-us/articles/how-to-use-intel-ipp-s-1d-fouri... 

I don't understand function   ippsFFTFwd_CToC_32fc(pSrc,pDst,pFFTSpec,pFFTWorkBuf); To make a FFT it is necessary to have values of any signal.