Add a useful package (from Source forge) for octave

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

diff --git a/octave_packages/communications-1.1.1/egolaygen.m b/octave_packages/communications-1.1.1/egolaygen.m
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+## Copyright (C) 2007 Muthiah Annamalai <muthiah.annamalai@uta.edu>
+##
+## 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} {}  egolaygen ()
+## 
+## Returns the Extended Golay code (24,12) generator matrix,
+## which can correct upto 3 errors. The second argument is the partiy
+## check matrix, for this code.
+##
+## @end deftypefn
+## @seealso{egolaydec,egolayenc}
+
+function [G,P]=egolaygen()
+  I=eye(12);
+  P=[1 0 0 0 1 1 1 0 1 1 0 1;
+     0 0 0 1 1 1 0 1 1 0 1 1;
+     0 0 1 1 1 0 1 1 0 1 0 1;
+     0 1 1 1 0 1 1 0 1 0 0 1;
+     1 1 1 0 1 1 0 1 0 0 0 1;
+     1 1 0 1 1 0 1 0 0 0 1 1;
+     1 0 1 1 0 1 0 0 0 1 1 1;
+     0 1 1 0 1 0 0 0 1 1 1 1;
+     1 1 0 1 0 0 0 1 1 1 0 1;
+     1 0 1 0 0 0 1 1 1 0 1 1;
+     0 1 0 0 0 1 1 1 0 1 1 1;
+     1 1 1 1 1 1 1 1 1 1 1 0;];
+  G=[P I]; %generator.
+end