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function y = RateDematch( x, X_i, e_ini, e_plus, e_minus );
% RateDematch reverses the basic UMTS/HSDPA Rate Matching algorithm
%
% The calling syntax is:
% y = RateDematch( x, X_i, e_ini, e_plus, e_minus );
%
% y = depunctured output (length X_i)
%
% x = input consisting of received/punctured bits
% X_i = length of the depunctured output
% e_ini = parameter used by algorithm
% e_plus = parameter used by algorithm
% e_minus = parameter used by algorithm
%
% Copyright (C) 2005, Matthew C. Valenti
%
% Last updated on Nov. 28, 2005
%
% Function RateDematch is part of the Iterative Solutions Coded Modulation
% Library (ISCML).
%
% The Iterative Solutions Coded Modulation Library is free software;
% you can redistribute it and/or modify it under the terms of
% the GNU Lesser General Public License as published by the
% Free Software Foundation; either version 2.1 of the License,
% or (at your option) any later version.
%
% This library 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
% Lesser General Public License for more details.
%
% You should have received a copy of the GNU Lesser General Public
% License along with this library; if not, write to the Free Software
% Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
e = e_ini;
y_index = 1;
for m=1:X_i
e = e - e_minus;
if (e<=0)
% mark for puncturing
e = e + e_plus;
y(m) = 0;
else
y(m) = x(y_index);
y_index = y_index + 1;
end
end
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