利用训练序列的OFDM系统定时同步算法

Robust Timing Synchronization Algorithm for OFDM System Using Training Sequence

在OFDM系统中,定时同步的好坏严重影响到接收端的接收。通过对各种已有定时同步方法的分析,利用CAZAC序列的良好特性,提出一种基于CAZAC训练序列的定时同步方法。改进后的算法能够很好地改善原有经典算法的峰值平台及测量不精确的问题。通过高斯白噪声信道仿真,证明了改进算法在定时同步方面较经典算法有明显提高。

Timing synchronization plays a crucial part in receivers using OFDM system.Based on the analysis of conventional timing synchronization methods,a new timing synchronization algorithm was proposed by taking advantage of CAZAC sequence,which exhibits better performance,compared with PN sequence.The improved algorithm can solve the plateau problem and improve measurement accuracy.Simulation in AWGN channel demonstrated that the new algorithm had a much better performance,compared with conventional techniques.