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Contol Suite RFFT Output

Francis Dar
Prodigy 50 points

Other Parts Discussed in Thread: CONTROLSUITE

Hi,

 

I am using the fixed point RFFT from the control suite (controlSUITE\libs\dsp\FixedPointLib\v101\examples_ccsv4\2833x_FixedPoint_RFFT). I do get results but they are not what I am expecting. Below are the expected and actual results when I run the code. Are the actual results correct? Please note that I haven't changed anything on the code yet (N is still 512).

 

Expected Result:

 

Actual Result:

 

 

  • 0
    Expert 1740 points
    if you are using 512 point Rfft that means that output would be 256 point in real and 256 points in imaginary.
    So the output you get is true only upto 256 points. After 256 points the data is repeated in real terms and inverted in imaginary terms.
    I think that you are getting the same result.
    So i think you are getting the right output.