OFDM
所属分类：通讯编程
开发工具：matlab
文件大小：122KB
下载次数：24
上传日期：2013-04-27 09:30:08
上 传 者：
章田
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。
(First of all, according to the characteristics of the short training word correlation calculation of the signal reaching the detector, when the detected correlation value is greater than the threshold of a certain frequency and that a signal arrives. Then, the correlation calculation according to the characteristics of the long training word, the initial estimate of the location of the OFDM symbol FFT window. The estimated position of the FFT window, the first small frequency offset estimation in the time domain, the small frequency offset compensation, the two long training word FFT operation integer frequency offset estimate, according to the result of the FFT operation. After the completion of these parameter estimates, data demodulation. The complete frequency offset compensation, and then based on the estimated FFT window position for the FFT operation to obtain a frequency domain data, demodulates the first data part. Then in a position corresponding to the pilot subcarriers extr)
文件列表:
OFDM\OFDM_rece_matlab\data_I_train_word_1_i0_256.txt (3870, 2003-03-14)
OFDM\OFDM_rece_matlab\data_I_train_word_2_i0_256.txt (3903, 2003-03-14)
OFDM\OFDM_rece_matlab\data_I_train_word_re_i0_256.txt (3853, 2003-03-16)
OFDM\OFDM_rece_matlab\data_Q_train_word_1_i0_256.txt (3867, 2003-03-14)
OFDM\OFDM_rece_matlab\data_Q_train_word_2_i0_256.txt (3908, 2003-03-14)
OFDM\OFDM_rece_matlab\data_Q_train_word_re_i0_256.txt (3854, 2003-03-16)
OFDM\OFDM_rece_matlab\OFDM_mod_I_ser_2up_sam_50.dat (496240, 2003-08-02)
OFDM\OFDM_rece_matlab\OFDM_mod_original_data_I_ser_2up_sam_50.dat (3908, 2003-08-02)
OFDM\OFDM_rece_matlab\OFDM_mod_original_data_Q_ser_2up_sam_50.dat (3895, 2003-08-02)
OFDM\OFDM_rece_matlab\OFDM_mod_Q_ser_2up_sam_50.dat (495175, 2003-08-02)
OFDM\OFDM_rece_matlab\v06_03_dem_2up_arrange.m (43884, 2005-01-22)
OFDM\OFDM_send_matlab\data_I_train_word_1_i0_256.txt (3870, 2004-01-02)
OFDM\OFDM_send_matlab\data_I_train_word_2_i0_256.txt (3903, 2004-01-02)
OFDM\OFDM_send_matlab\data_I_train_word_re_i0_256.txt (3853, 2004-01-02)
OFDM\OFDM_send_matlab\data_Q_train_word_1_i0_256.txt (3867, 2004-01-02)
OFDM\OFDM_send_matlab\data_Q_train_word_2_i0_256.txt (3908, 2004-01-02)
OFDM\OFDM_send_matlab\data_Q_train_word_re_i0_256.txt (3854, 2004-01-02)
OFDM\OFDM_send_matlab\HBF23.txt (212, 2004-01-02)
OFDM\OFDM_send_matlab\I1.txt (3840, 2004-01-02)
OFDM\OFDM_send_matlab\I2.txt (3840, 2004-01-02)
OFDM\OFDM_send_matlab\I3.txt (3840, 2004-01-02)
OFDM\OFDM_send_matlab\I4.txt (3840, 2004-01-02)
OFDM\OFDM_send_matlab\ofdm_mod.m (8936, 2005-01-22)
OFDM\OFDM_send_matlab\SoutI_4_BF.txt (92654, 2004-01-02)
OFDM\OFDM_send_matlab\SoutI_4_IF.txt (185308, 2004-01-02)
OFDM\程序流程说明.doc (41472, 2003-12-29)
OFDM\OFDM_rece_matlab (0, 2009-05-17)
OFDM\OFDM_send_matlab (0, 2009-05-17)
OFDM (0, 2009-05-17)
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