ofdm2883819

OFDM

% 一个OFDM符号128个有效符号，插入128个虚拟子载波
% 符号率（即有效数据率）fsymbol，而发送速率（需要包括虚拟子载波）2fsymbol
% 输入的数据需要2倍的发送数据率，以便进行内插，实现位定时跟踪，即4倍fsymbol采样率的调制信号
% OFDM symbol Nfft=128 points
% 一个OFDM符号数据点 Nfft*2 = 256 ， Guard Interval点 ＝Ng*2=64

% ------------------------------------------------------------------------------------
close all;
clear;

initializing_now = [‘please wait...‘]

% ------------------------------------------------------------------------------------
% 参数设置

% 系统参数设置
% FFT点数为256，子载波个数为128，虚拟子载波个数为128
Nfft = 128;
Ng = 32;
Ntotal = Nfft+Ng;

M_pilot = 8; % 每个OFDM符号加入的导频数目

Max_symbols = 50;



% 读取训练字
% 短训练字的内容
% 10重复的个短训练字，每个是一个Guard Interval的长度
% 可以看成2个重复的长训练字，每个长训练字是由5个重复的部分组成的
% 这里读入的是这样一个假设的长训练字的频域上的值
% I，Q两路分别读入
fid3=fopen（‘data_I_train_word_re_i0_256.txt‘‘r‘）;

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----
     文件       41472  2003-12-29 11:04  ofdm仿真程序\程序流程说明.doc
     文件        3870  2003-03-14 21:49  ofdm仿真程序\OFDM_rece_matlab\data_I_train_word_1_i0_256.txt
     文件        3903  2003-03-14 21:49  ofdm仿真程序\OFDM_rece_matlab\data_I_train_word_2_i0_256.txt
     文件        3853  2003-03-16 13:54  ofdm仿真程序\OFDM_rece_matlab\data_I_train_word_re_i0_256.txt
     文件        3867  2003-03-14 21:49  ofdm仿真程序\OFDM_rece_matlab\data_Q_train_word_1_i0_256.txt
     文件        3908  2003-03-14 21:49  ofdm仿真程序\OFDM_rece_matlab\data_Q_train_word_2_i0_256.txt
     文件        3854  2003-03-16 13:54  ofdm仿真程序\OFDM_rece_matlab\data_Q_train_word_re_i0_256.txt
     文件      496240  2003-08-02 15:07  ofdm仿真程序\OFDM_rece_matlab\OFDM_mod_I_ser_2up_sam_50.dat
     文件        3908  2003-08-02 15:07  ofdm仿真程序\OFDM_rece_matlab\OFDM_mod_original_data_I_ser_2up_sam_50.dat
     文件        3895  2003-08-02 15:07  ofdm仿真程序\OFDM_rece_matlab\OFDM_mod_original_data_Q_ser_2up_sam_50.dat
     文件      495175  2003-08-02 15:07  ofdm仿真程序\OFDM_rece_matlab\OFDM_mod_Q_ser_2up_sam_50.dat
     文件       43884  2005-01-22 16:44  ofdm仿真程序\OFDM_rece_matlab\v06_03_dem_2up_arrange.m
     文件        3870  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\data_I_train_word_1_i0_256.txt
     文件        3903  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\data_I_train_word_2_i0_256.txt
     文件        3853  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\data_I_train_word_re_i0_256.txt
     文件        3867  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\data_Q_train_word_1_i0_256.txt
     文件        3908  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\data_Q_train_word_2_i0_256.txt
     文件        3854  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\data_Q_train_word_re_i0_256.txt
     文件         212  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\HBF23.txt
     文件        3840  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\I1.txt
     文件        3840  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\I2.txt
     文件        3840  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\I3.txt
     文件        3840  2004-01-02 14:03  ofdm仿真程序\OFDM_send_matlab\I4.txt
     文件        8936  2005-01-22 18:58  ofdm仿真程序\OFDM_send_matlab\ofdm_mod.m
     文件       92654  2004-01-02 14:07  ofdm仿真程序\OFDM_send_matlab\SoutI_4_BF.txt
     文件      185308  2004-01-02 14:07  ofdm仿真程序\OFDM_send_matlab\SoutI_4_IF.txt