?? wienerdec.m
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function [H,out] = Wienerdec(g,in,sig,sigma)
% wienerdec -- Wiener filter for deconvolution.
% Usage
% [H,out] = wienerdec(g,in,sigma)
% Inputs
% g Convolution filter.
% in Degraded signal.
% sig Original signal.
% sigma S.d. of the additive GWN.
% Outputs
% H Wiener filter
% out Restored signal.
%
Y=fft(sig);
FN=fft(in);
n=length(in);
PY=abs(Y.*Y);
G=fft(g);
Gsq=G.*conj(G);
H=(PY.*conj(G))./(PY.*Gsq + n*sigma^2);
FN=FN.*H;
out=real(ifft(FN));
% Written by Maureen Clerc and Jerome Kalifa, 1997
% clerc@cmapx.polytechnique.fr, kalifa@cmapx.polytechnique.fr
%% Part of Wavelab Version 850% Built Tue Jan 3 13:20:39 EST 2006% This is Copyrighted Material% For Copying permissions see COPYING.m% Comments? e-mail wavelab@stat.stanford.edu
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