At 16:19 +0530 02/04/2004, Dr Sanjay Gupta wrote:
>Gerd,
>
>Why not just add up the complex fft's of the various segments prior to
>computing the magnitude and phase. Works every time.
Works differently. That is a vector addition. For a varying phase it will reduce
your signal. For overlapping FFTs phase slip will reduce the signal to zero after
enough time. RMS averaging will average the magnitude. Very different.
-Scott
--
Dr. Scott Hannahs, Head of User Research Instrumentation
http://sthmac.magnet.fsu.edu
National High Magnetic Field Laboratory, Florida State University
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