【摘要】 提出了一种正交频分复用(OFDM)系统的频率同步方案。该方案包含一个细同步算法和一个粗同步算法。细同步算法是对MOOSE算法的改进,使其频率捕获范围扩大一倍;粗同步算法通过对特殊的长训练序列进行频域相关运算,来估计大范围的频率偏移,它与改进的细同步算法相结合,能够纠正达到半个系统带宽的频偏。仿真表明这是一种准确而可靠的频率同步方案。更多还原

【Abstract】 In this paper,it proposes a new frequency synchronization project for OFDM systems.It includes one exact algorithm and one inexact algorithm of frequency synchronization in this project.The exact Algorithm is the result of the ameliorating of Moose’s algorithm.It makes the spectrum of being captured one times extended.The inexact algorithm takes advantage of the cross correlation of special long preamble to extend the spectrum of being captured.The result shows,the project is exact and credible.更多还原