ofdm_demodulator.m

用matlab对MIMO-OFDM通信系统的设计仿真的源代码

function [output_demod_data]=OFDM_demodulator(input_demod_data,num_guard_length,num_carriers)
% Function OFDM_demodulator +++++++++++++++++++++++++++++++++++++++++++++++++
% realize OFDM demodulation

% Input data:  input_demod_data - input data vector of demodulator 
%              guard_length- the length of guard interval
% Output data: output_demod_data - output data vector of demodulator

% Begin:  Feb, 2005
% Last edited: Feb.1, 2005
%   Feng Wan    

output_demod_data=zeros(1,num_carriers,1);
fft_length=num_carriers;
temp_data=input_demod_data(num_guard_length+1:num_guard_length+num_carriers);   %Delete the cyclic prefix
output_demod_data=fft(temp_data)/sqrt(fft_length);   %FFT