基于PN序列的符号同步算法研究

摘要

针对TDS-OFDM系统的工作特点,为了降低频偏估计的误差,采用PN序列作为训练序列来进行信道估计,并提出了双滑动窗口函数进行符号同步.应用MATLAB进行仿真实验,仿真结果证实了提出的方法能较好地提高频偏估计的精度,当采用OFDM符号前后两个前缀序列来进行频偏估计时,可以将频偏的估计精度控制在10-3以下.%Based on the the principle of TDS-OFDM system, in order to reduce the frequency offset estimation error, this paper used PN sequence as training sequence for channel estimation. In this paper,sliding windows with double-function symbol synchronization are proposed. And the application of MATLAB simulation shows that the proposed method can improve the precision of frequency estimation,when using the two prefix sequences before and after the OFDM symbol in frequency offset estimation, its accuracy can be controUed in l0-3.