OFDM系统的一种精确的符号定时估计——纪念汪德昭院士诞辰100周年

Accurate estimation of OFDM symbol timing ——In memory of the late Academician Professor Wang Dezhao, 1905- 1998

作为一种高效的数据传输技术,正交频分复用(OFDM)技术具有良好的抗衰落能力,实现数据的高速传输。但是OFDM对同步误差特别是符号同步误差十分敏感。本文提出了一种低复杂度的符号定时估计,利用一个训练帧来实现同步。文中分析了该算法的性能,并在噪声信道中进行了性能分析,给出的仿真结果表明,该算法具有较高的精度和较低的计算复杂度。

As an efficient data transmission technique, OFDM can resist multi-path fading and realize high data rate transmission. However it is particularly sensitive to synchronization errors, especially errors in symbol synchronization. In this paper, a novel symbol timing estimation algorithm is presented which realizes symbol synchronization by using a symbol. Performance of the approach is analyzed, and simulation results presented. The results show that the method has high precision and lower computation complexity.