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handling fft

Started by paco...@gmx.net April 8, 2005

I am producing a signal modulated by a gaussian. What I do not control are the small peaks that appear in the signal. Are they a consequence of the discretenes of fft's?

N24;

k=1:1:N;

for i=1:N,
phireal0(i).*exp(-i^2/(N/10)^2/2);
end

phir0t(phireal0);

for i=1:1:N,
phir(i)=phir0(i)*exp(2*pi*j*rand(1));
end

phireal=real(ifft(phir));
%phireal shows undesireable small feautures.