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When we apply fourier transform over a signal will i get same power or energy signal as i get in time domain?

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Biomedical
Biomedical 2013-9-12
Kindly, elaborate the ans if yes then how and no then how?

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回答（1 个）

Matt J
Matt J 2013-9-12
If you normalize appropriately, then yes. E.g.,
>> x=rand(1,5);
>> norm(x)
ans =
1.6536
>> norm(fft(x)/sqrt(numel(x)))
ans =
1.6536

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