OFDM系统中的一种有效频偏估计算法  

A Novel Frequency Offset Estimation Algorithm for OFDM Systems

作　　者：禹永植[1] 张兴周[1] 孙会楠[2] 

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001 [2]哈尔滨理工大学测控技术与通信工程学院,黑龙江哈尔滨150080

出　　处：《系统仿真学报》2008年第14期3811-3814,共4页Journal of System Simulation

摘　　要：通过设计一种特殊的训练序列,提出了一种新型的正交频分复用(OFDM)系统频偏估计算法。只需要一个训练序列,就可以有效地对整数倍与小数倍的频偏进行估计,并且还可以利用该特殊训练序列进行符号定时估计。仿真结果表明,与传统算法相比,提出的算法不仅减少了训练序列数目,而且提高了频偏估计精度。A new frequency offset estimation algorithm for orthogonal frequency division multiplexing （OFDM） systems was proposed by using a specially designed training symbol. Requiring only one training symbol, this algorithm can efficiently estimate integer frequency offset and fraction frequency offset. The timing synchronization can also be obtained by using the proposed training symbol. Simulation results show that the proposed method not only reduces the number of the training symbols but also improves the accuracy of frequency offset estimation, while comparing with conventional algorithms.

关 键 词：正交频分复用 频偏估计 符号定时估计 训练序列 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论] TN929.5[自动化与计算机技术—计算机科学与技术]