multx_time_domain.m

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% #####################################################################
% ####   Matlab  function for simulating IFFT computation, CP       ###
% ####   insertion and and GI insertion.                            ###
% ####   FFT is performed using Matlab's built in function          ###
% ####                                                              ###
% #####################################################################
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  Property of Freescale
%  Freescale Confidential Proprietary
%  Freescale Copyright (C) 2005 All rights reserved
%  ----------------------------------------------------------------------------
%  $RCSfile: mULTx_Time_Domain.m.rca $
%  $Revision: 1.6 $
%  $Date: Fri Dec  8 14:13:54 2006 $
%  Target: Matlab
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%-- Matlab files used by this file
% mGIInsertion
% cp_insertion
%-- End of list

function [ifftout_cp] = mULTx_Time_Domain(ZoneConfig,TPparam,d_v_freq_inp)

% initialization
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% Read system parameters 
n_cp = TPparam.SizeCP;    %Cyclic Prefix length(number of elements)

% processing
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%add DC carrier and guard bands, DC first -> guard insertion is put into TP
d_v_freq_inp_withGuard = mGIInsertion(d_v_freq_inp,ZoneConfig.NFFT,ZoneConfig.LGuard,ZoneConfig.RGuard);

% IFFT computation and calculation of OFDM symbol time samples
% uses the built in IFFT function
ifftout = ifft(d_v_freq_inp_withGuard);

% Insert cyclic prefix and transpose
ifftout_cp = cp_insertion(ifftout,n_cp);

%concatenate all OFDM symbols in one column vector
[blksize,symbols] = size(ifftout_cp);
ifftout_cp = reshape(ifftout_cp,blksize*symbols,1);