基于训练序列的OFDM同步改进算法  

Improved Synchronization Algorithm for OFDM Based on Training Sequence

作　　者：李宏鉴 

机构地区：[1]北方工业大学电子信息工程学院,北京100144

出　　处：《北方工业大学学报》2016年第1期19-23,共5页Journal of North China University of Technology

摘　　要：正交频分复用(OFDM)技术作为第4代通信系统的核心技术,为第4代通信系统提供了很好的数据传输方案.本文在原有定时同步算法的基础上,提出了一种新的用于定时同步的训练序列结构,并给出相应的定时度量函数以及载波频率偏差公式.根据新训练序列的相关运算以及新的定时度量函数得到数据符号的正确采样点.该算法的理论分析和Matlab仿真结果表明,改进的训练序列及相应的定时函数较原有算法定时更加精确,在高信噪比的情况下也能够准确定时.OFDM as the core technology in 4Gcommunication provides a good data transmission scheme for the fourth generation communication system.This paper presents a new structure of training sequence with its corresponding timing metric function and frequency offset estimation function based on the former algorithm.According to the correlation operation and timing metric function to the new training sequence,the correct sampling point of data symbol is obtained.The theoretical analysis and simulation results show that this improved synchronization algorithm has an impulse-shaped timing metric and a better performance than the previous method and it also has a stable performance in the high SNR.

关 键 词：OFDM 定时同步 训练序列 频偏估计 

分 类 号：TN914.3[电子电信—通信与信息系统]