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genqamdemod.m    41 lines (33 with data), 1.3 kB

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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)
print_usage ();
endif
if (isvector (const) ~= 1)
error ("const must be a vector");
endif
for k = 1:size (y, 1)
for l = 1:size (y, 2)
[val z(k,l)] = min (abs (y(k,l) - const));
endfor
endfor
z = z - 1;
endfunction