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AWR1642: mmWave Demo, Blackman window or Hanning window?

James Austrial
Expert 3980 points
Part Number: AWR1642

Hi,

In the C:\ti\mmwave_sdk_01_00_00_05\packages\ti\demo\xwr16xx\mmw\docs\doxygen\html\index.html

It has two kinds of description for window function before doing FFT:

(1) Before FFT calculation, a Blackman window is applied to ADC samples using mmwlib library function.

(2) Because we do a Hanning window before the FFT, the overall scale is 1/2 of the FFT scale

Which description is correct?

  • 0
    TI__Expert 4720 points

    Hi James. 

    The selection of the window for the FFT is upto the user. In the current SDK, for the 1D FFT, we use the blackman window and for the 2D FFT we use the Hanning window. At different points in the development, we used different kinds of windows, so the documentation may reflect that. 

    In case you want to change the window, you can modify the function MmwDemo_dataPathConfigFFTs in the file dss_data_path.c. 

    Regards,
    Anil