mrx_time_domain.m

OFDMA 物理层开发的matlab 源码.飞思卡尔提供.对物理层开发的工程师有帮助!

% #####################################################################
% ####   Matlab  floating point program for CP removal, FFT         ###
% ####   (OFDM demodulataion) and left and right GI removal.        ###
% ####   This function uses built in FFT function (floating point)  ###
% #####################################################################
% Input:
%       ZoneConfig      -- ZoneConfig structure
%       TPparam         -- TPparam structure
%       d_v_time_inp    -- Row vector. Noise and channel model added Tx
%                          signal of MS (Tx signal of BS)
%       TC              -- NA
% Output:
%       d_v_freq_out    -- Output data (Matrix [phy subcari, ofdma sym])
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%  Property of Freescale
%  Freescale Confidential Proprietary
%  Freescale Copyright (C) 2005 All rights reserved
%  ----------------------------------------------------------------------------
%  $RCSfile: mRx_Time_Domain.m.rca $
%  $Revision: 1.7 $
%  $Date: Wed Dec 13 16:55:14 2006 $
%  Target: Matlab
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%-- Matlab files used by this file
% mCp_removal
% mGIRemove
%-- End of list

function [d_v_freq_out] = mRx_Time_Domain(ZoneConfig,TPparam,d_v_time_inp)

% initialization
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

% Read system parameters of desired test case
ns   = TPparam.SizeFFT;   % Number of QAM samples per OFDM symbol(FFT order)
n_cp = TPparam.SizeCP;    % Cyclic Prefix length(number of elements)

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

% Remove cyclic prefix
fft_inp = mCp_removal(d_v_time_inp,ns,n_cp,0);

% FFT computation
fft_out = fft(fft_inp);
d_v_freq_out_withGuard = fft_out;    % before guard removal

%remove guard bands (and shift DC to the middle)-> guard removal is put
%into TP
d_v_freq_out = mGIRemove(d_v_freq_out_withGuard,ZoneConfig.NFFT,ZoneConfig.LGuard,ZoneConfig.RGuard);