Add a useful package (from Source forge) for octave

[CreaPhase.git] / octave_packages / communications-1.1.1 / genqamdemod.m

diff --git a/octave_packages/communications-1.1.1/genqamdemod.m b/octave_packages/communications-1.1.1/genqamdemod.m
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+## Copyright (C) 2007 Sylvain Pelissier <sylvain.pelissier@gmail.com>
+##
+## This program is free software; you can redistribute it and/or modify it under
+## the terms of the GNU General Public License as published by the Free Software
+## Foundation; either version 3 of the License, or (at your option) any later
+## version.
+##
+## This program is distributed in the hope that it will be useful, but WITHOUT
+## ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+## FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
+## details.
+##
+## You should have received a copy of the GNU General Public License along with
+## this program; if not, see <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Function File} {[@var{z}] =} genqamdemod(@var{y},@var{const})
+##     Compute the general quadrature amplitude demodulation of y.
+## @seealso{genqammod,qammod,qamdemod}
+## @end deftypefn
+
+function z = genqamdemod(y,const)
+       if ( nargin < 1 || nargin > 2)
+               error('usage : z = genqamdemod(y,const)');
+       end
+       
+       if(isvector(const) ~= 1)
+               error('const must be a vector');
+       end
+       
+       for k = 1:size(y,1)
+               for l = 1:size(y,2)
+                       [val z(k,l)] = min(abs(y(k,l)-const));
+               end
+       end
+       
+       z = z -1;
+