mgiinsertion.m

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% #####################################################################
% ####   Matlab  function for left and rigth GI insertion           ###
% ####                                                              ###
% ####   Input:                                                     ###
% ####   d_v_freq_inp: freq. domain slotvector                      ###
% ####   NFFT : IFFT size (512, 1024)                               ###
% ####   LGuard: left guard size                                    ###
% ####   RGuard: right guard size                                   ###
% #####################################################################

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  Property of Freescale
%  Freescale Confidential Proprietary
%  Freescale Copyright (C) 2005 All rights reserved
%  ----------------------------------------------------------------------------
%  $RCSfile: mGIInsertion.m.rca $
%  $Revision: 1.1 $
%  $Date: Mon Oct 23 14:37:44 2006 $
%  Target: Matlab
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
function d_v_freq_inp_withGuard = mGIInsertion(d_v_freq_inp,NFFT,LGuard,RGuard)

NumGuards = RGuard+LGuard;
NFFTUsed=NFFT-NumGuards;%Including the DC
[m n] = size(d_v_freq_inp);

d_v_freq_inp_withGuard = [ d_v_freq_inp((NFFTUsed-1)/2+1:end,:);... %DC and right data
        zeros(NumGuards,n);... %left and right guard
        d_v_freq_inp(1:(NFFTUsed-1)/2,:) ... %left data
      ];