Register to reply

FFT (Fast Fourier Transform) - a method for phase continuation

by petol
Tags: fft, fourier transform, phase, spectrum
Share this thread:
petol
#1
Jun13-09, 05:59 PM
P: 2
Hello everyone,
Finding a good query to find an answer in www search engines isn't as easy as I thought. The subject is very narrow and sophisticated.
When one performs a FFT, he/she/IT ;) gets the amplitude and phase spectra. The phase spectrum ranges from -PI to PI. Then, there are of course places where the phase spectrum is discontinuous because it exceeds the range. How to obtain such continuous phase spectrum? Does any one know the idea for this?
Kind Regards
Phys.Org News Partner Science news on Phys.org
Experts defend operational earthquake forecasting, counter critiques
EU urged to convert TV frequencies to mobile broadband
Sierra Nevada freshwater runoff could drop 26 percent by 2100
petol
#2
Jun15-09, 03:45 PM
P: 2
Maybe this picture will help. I duplicated the same phase spectrum several times and shifted n*PI each.
I'm looking for such method because I've seen it in some paper works.
Attached Thumbnails
phase-spec.png  


Register to reply

Related Discussions
Fast Fourier Transform graph Introductory Physics Homework 0
Fast Fourier Transform (FFT) Input Question Electrical Engineering 4
Matlab/Fast Fourier Transform Math & Science Software 0
Fourier transform of a phase function Calculus & Beyond Homework 1
Fast Fourier Transform General Engineering 4