Actually, it shouldn't work every time. If you have two identical FFTs with opposite phases, adding the complex FFTs will cancel them out. You would lose data if you add up all the complex FFTs, and the "average" value would be smaller than the correct value.
Bruce ------------------------------------------ Bruce Ammons Ammons Engineering www.ammonsengineering.com (810) 687-4288 Phone (810) 687-6202 Fax -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Dr Sanjay Gupta Sent: Wednesday, February 04, 2004 5:49 AM To: Gerd Rech Cc: [EMAIL PROTECTED] Subject: Re: [W6.1] RMS averaging with "FFT Spectrum (Mag-Phase).vi" Gerd, Why not just add up the complex fft's of the various segments prior to computing the magnitude and phase. Works every time. Sanjay Gupta +---------------------------------------------------------------------+ + Chief Scientific Officer & Former Head Phones:0512-2597830 (Off)+ + Advanced Centre for Materials Science 2574628, 3117477 (Res)+ + Indian Institute of Technology + + Kanpur 208016, India Fax:+91-(0)512-2597459 + + + +---------------------------------------------------------------------+
