1 Reply Latest reply on Feb 2, 2016 3:34 AM by hima

    CMSIS-DSP, real value FFT (RFFT) with fixed point values

    user_246598725

      Hi,

         

       

         

      has anyone used the CMSIS-DSP RFFT_Q15 implementation yet? Currently I'm feeding it with predefined values to check if I understand it correctly, but the output has negative values for the frequency bins, and I don't know why. For my understanding the output should be only positive values.

         

       

         

      Regards,

         

       

         

      Ralf