OFDM-MATLAB

  首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。(failed to translate)

OFDM-MATLAB
...........\OFDM_rece_matlab
...........\................\data_I_train_word_1_i0_256.txt
...........\................\data_I_train_word_2_i0_256.txt
...........\................\data_I_train_word_re_i0_256.txt
...........\................\data_Q_train_word_1_i0_256.txt
...........\................\data_Q_train_word_2_i0_256.txt
...........\................\data_Q_train_word_re_i0_256.txt
...........\................\OFDM_mod_I_ser_2up_sam_50.dat
...........\................\OFDM_mod_original_data_I_ser_2up_sam_50.dat
...........\................\OFDM_mod_original_data_Q_ser_2up_sam_50.dat
...........\................\OFDM_mod_Q_ser_2up_sam_50.dat
...........\................\v06_03_dem_2up_arrange.m
...........\OFDM_send_matlab
...........\................\data_I_train_word_1_i0_256.txt
...........\................\data_I_train_word_2_i0_256.txt
...........\................\data_I_train_word_re_i0_256.txt
...........\................\data_Q_train_word_1_i0_256.txt
...........\................\data_Q_train_word_2_i0_256.txt
...........\................\data_Q_train_word_re_i0_256.txt
...........\................\HBF23.txt
...........\................\I1.txt
...........\................\I2.txt
...........\................\I3.txt
...........\................\I4.txt
...........\................\ofdm_mod.m
...........\................\SoutI_4_BF.txt
...........\................\SoutI_4_IF.txt
...........\程序流程说明.doc