
#1
Mar1212, 10:54 AM

P: 4

Hi everyone,
I have this Matlab code : function PH = testing close all; x = [0:1e3:101e3]; ph = (x5).^2; y = exp((x5).^2./(0.2^2)).*exp(i*2*pi*ph); Y = fft(y); Y = fftshift(Y); PH = angle(Y); X = (x(2)  x(1))^1*linspace(0,1,length(x)); figure plot(x,ph); figure plot(X,PH); end I build a gaussian curve with quadratic phase and Fourier Transform it. I expect to have a quadratic phase (with opposite sign) in the spectral domain, but I cannot have it correctly. The plot of PH shows jumps between adjacent points. Even using unwrap.m I cannot plot it well. Thanks in advance for any help 


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