FFT Windowing

General discussion on mikroPascal for dsPIC30/33 and PIC24.
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lpmsr
Posts: 117
Joined: 17 Jul 2009 02:10

FFT Windowing

#1 Post by lpmsr » 05 Sep 2009 23:14

Does anyone have any proven window functions that they have implemented in one of the Mikro compilers? I have tried a couple different windows ahead of FFT, and they definitely improve leakage, but none have had enough dynamic range or resolution to make an acceptable display when using a log scale. I am seeing about 35dB dynamic range between maximum signal and noise floor.

Larry
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SamY Fareast
Posts: 46
Joined: 05 Aug 2007 07:15
Location: Shizuoka JAPAN

#2 Post by SamY Fareast » 12 Sep 2009 05:09

Hi Larry.
I recommend Blackman window.
You can see comparison of window function at Wikipedia.http://en.wikipedia.org/wiki/Window_fun ... of_windows
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lpmsr
Posts: 117
Joined: 17 Jul 2009 02:10

#3 Post by lpmsr » 12 Sep 2009 05:47

Thanks. I was looking for something that could be implemented in MikroBasic without requiring too much processing power. I have worked out a couple solutions that seem to work quite well, without undue processing load.

Larry
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Pipls
Posts: 12
Joined: 07 Sep 2009 19:52

#4 Post by Pipls » 12 Oct 2009 22:23

Great work
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