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diff --git a/octave_packages/communications-1.1.1/matintrlv.m b/octave_packages/communications-1.1.1/matintrlv.m
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+## Copyright (C) 2008 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{intrlvd} =} matintrlv (@var{data}, @var{nrows}, @var{ncols})
+## Interleaved elements of @var{data} with a tempory matrix of size 
+## @var{nrows}-by-@var{ncols}.
+## @seealso{matdeintrlv}
+## @end deftypefn
+
+function intrlvd = matintrlv(data,Nrows,Ncols)
+	
+	if(nargin < 3 || nargin >3)
+		error('usage : interlvd = matinterlv(data,Nrows,Ncols)');
+	end
+	
+	if(~isscalar(Nrows) || ~isscalar(Ncols))
+		error("Nrows and Ncols must be integers");
+	end
+	
+	if( Nrows ~= floor(Nrows)|| Ncols ~= floor(Ncols))
+		error("Nrows and Ncols must be integers");
+	end
+	
+	s = size(data);
+	if(isvector(data))
+		if(length(data) ~= Nrows*Ncols)
+			error("The length of data must be equals to Ncols*Nrows");
+		end
+		data = reshape(data,Ncols,Nrows)';
+		intrlvd = reshape(data,s);
+	else
+		for k = 1:s(2);
+			if(length(data) ~= Nrows*Ncols)
+				error("The number of rows of data must be equals to Ncols*Nrows");
+			end
+			tmp(:,:,k) = reshape(data(:,k),Ncols,Nrows)';
+			intrlvd(:,k) = reshape(tmp(:,:,k),s(1),1);
+		end
+	end