为了提高正交频分复用(OFDM)系统定时同步的抗窄带干扰能力,利用加扰的思想对Park算法的前导符号进行了改进,并提出了新的定时测度函数.通过TU-6多径信道下的仿真表明,在窄带干扰的影响下改进算法仍能保持尖锐的相关峰值特性,实现准确的定时估计,同时其性能会随着子载波数的增加得到提升.此外,改进算法也降低了相关旁峰的大小,提高了定时同步的抗噪声能力. In order to improve the anti-narrowband interference ability of OFDM system timing synchronization, the preamble symbol of Park algorithm is improved by using the idea of ​​scrambling and a new timing measurement function is proposed.Through TU-6 multipath The simulation under the channel shows that the improved algorithm can maintain the sharp correlation peak under the influence of narrow-band interference and achieve accurate timing estimation, and its performance will be improved with the increase of subcarriers.In addition, the improved algorithm also reduces Related to the size of the peak, improve the anti-noise ability of timing synchronization.