MATLAB

代码说明：

  接收端采用的算法和程序流程与发送端发送的OFDM符号的帧结构有关系。具体的帧结构，以及定时估计，频偏估计，剩余误差跟踪的算法可参考算法说明文档。这里对程序的流程进行说明。 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。 (good)

文件列表：

完美的OFDM仿真程序MATLAB
........................\完美的OFDM仿真程序MATLAB
........................\........................\OFDM_rece_matlab
........................\........................\................\data_I_train_word_1_i0_256.txt,3870,2003-03-14
........................\........................\................\data_I_train_word_2_i0_256.txt,3903,2003-03-14
........................\........................\................\data_I_train_word_re_i0_256.txt,3853,2003-03-16
........................\........................\................\data_Q_train_word_1_i0_256.txt,3867,2003-03-14
........................\........................\................\data_Q_train_word_2_i0_256.txt,3908,2003-03-14
........................\........................\................\data_Q_train_word_re_i0_256.txt,3854,2003-03-16
........................\........................\................\OFDM_mod_I_ser_2up_sam_50.dat,496240,2003-08-02
........................\........................\................\OFDM_mod_original_data_I_ser_2up_sam_50.dat,3908,2003-08-02
........................\........................\................\OFDM_mod_original_data_Q_ser_2up_sam_50.dat,3895,2003-08-02
........................\........................\................\OFDM_mod_Q_ser_2up_sam_50.dat,495175,2003-08-02
........................\........................\................\v06_03_dem_2up_arrange.m,43884,2005-01-22





........................\........................\................\结果.txt,455,2010-05-20
........................\........................\................\长训练字相关值5.jpg,68419,2010-05-20
........................\........................\OFDM_send_matlab





........................\........................\................\6.jpg,59314,2010-05-20
........................\........................\................\data_I_train_word_1_i0_256.txt,3870,2004-01-02
........................\........................\................\data_I_train_word_2_i0_256.txt,3903,2004-01-02
........................\........................\................\data_I_train_word_re_i0_256.txt,3853,2004-01-02
........................\........................\................\data_Q_train_word_1_i0_256.txt,3867,2004-01-02
........................\........................\................\data_Q_train_word_2_i0_256.txt,3908,2004-01-02
........................\........................\................\data_Q_train_word_re_i0_256.txt,3854,2004-01-02
........................\........................\................\HBF23.txt,212,2004-01-02
........................\........................\................\I1.txt,3840,2004-01-02
........................\........................\................\I2.txt,3840,2004-01-02
........................\........................\................\I3.txt,3840,2004-01-02
........................\........................\................\I4.txt,3840,2004-01-02
........................\........................\................\ofdm_mod.m,8936,2005-01-22
........................\........................\................\SoutI_4_BF.txt,92654,2010-03-17
........................\........................\................\SoutI_4_IF.txt,185308,2010-03-17
........................\........................\................\结果.txt,427,2010-05-20
........................\........................\程序流程说明.doc,41472,2003-12-29