power spectrum VS amplitude of FFT function

1 Jun 2013

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Hi. what is the different between power spectrum and amplitude in FFT function?

if there is, how to calculate each one?

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Craig Cowled on 1 Jun 2013

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Power = 20 * log10(abs(FFT))

Bob GH on 1 Jun 2013

Thanks Craig. You mean if I apply fft from input and take abs from result, it gives amplitude. Is it correct?

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