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Subject: when to correct for energy and amplitude in windowed signal spectrum? From: shinchan Tung Date: 8 Oct, 2010 23:44:04 Message: 1 of 4 
When should I multiply the correction factor to a windowed signal? Before FFT or after? I thought I read it somewhere that ECF is multiplied to the spectrum *AFTER* you do FFT, so I use following code to test how cosistent the estimates of sum of square are in time domain and frequency domain. The code below shows that multiply ECF before FFT is a better estimate than after FFT. I just want to get a confirmation from you experts. Also, is subtracting the mean necessary before FFT? 
Subject: when to correct for energy and amplitude in windowed signal spectrum? From: Nasser Abbasi Date: 8 Oct, 2010 23:58:42 Message: 2 of 4 
A suggestion: Try the DSP newsgroup for DSP specific questions: 
Subject: when to correct for energy and amplitude in windowed signal spectrum? From: dbd Date: 9 Oct, 2010 04:21:34 Message: 3 of 4 
On Oct 8, 4:44 pm, "shinchan Tung" <shinchan75...@gmail.com> wrote: 
Subject: when to correct for energy and amplitude in windowed signal spectrum? From: Greg Heath Date: 13 Oct, 2010 01:57:13 Message: 4 of 4 
On Oct 9, 12:21 am, dbd <d...@ieee.org> wrote: 
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