Hi all,

I happen to see this expression for Average FFT noise floor in many Application Notes.
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Average FFT Noise Floor (dB) = 6.02n + 1.76dB + 10 log(3*M / (pi * ENBW)),
where M is the number of data points in the FFT.
ENBW is the equivalent noise bandwidth of the window function (see next section on how FFTs are generated)
n is the number of bits of the A/D converter
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Please help me in finding a reference for deriving this expression.


Thanks,
yvkrishna

thanks loose-electron.