Correct Scaling Factor from Q15 FFT output to Float

I get the correct FFT output "shape" of a say sine wave using
DSP_fft16x16t with C6415, but the it is in Q15. How can I accurately
scale it back to a float value? Do I just have to find the correct
value by referring to say the output of Matlab or other software?
-Jeffrey Start a New Thread

Hello Jeffrey,

On Mon, Sep 8, 2008 at 1:49 PM, Jeffrey Y. Beyon wrote:
> I get the correct FFT output "shape" of a say sine wave using
> DSP_fft16x16t with C6415, but the it is in Q15. How can I accurately
> scale it back to a float value? Do I just have to find the correct
> value by referring to say the output of Matlab or other software?


Do you want to compute the results using floating point [pretty slow]
or just express the final results in floating point?? or something
else??

mikedunn
> -Jeffrey

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