基于迭代滤波机制的OFDM系统的频偏估计

Frequency offset estimation for OFDM systems on the base of iterative filtering mechanism

本文提出一种估计OFDM系统频偏参数的新思路:将一些原用于单载波调制信号的频偏估计算法,与迭代滤波机制相结合,提高其精度,使之满足OFDM的要求,从而用到OFDM系统的同步中。本文举了一个具体例子,matlab6.0平台上的仿真结果表明例子给出的算法估计精度高、捕获范围大,有很好的应用价值。

This paper proposes a new method to estimate the frequency offset parameter of OFDM systems, which employs some frequency offset estimation algorithm appropriate for single-carrier modulated signals and combines it with iterative filtering mechanism in order to promote its accuracy up to OFDM requirement. Furthermore, this paper gives out an application example. The simulation results on matlab6.0 show that the example brings an efficient frequency offset estimator for OFDM with high accuracy and broad estimation range. So it is valuable in practice.