OFDM系统中一种高效的符号定时估计算法

本文提出了一种新的适合于OFDM系统的符号定时估计算法。该算法利用经过特殊处理的前后两段信息序列的内在相关性进行准确的符号定时估计。理论分析和仿真表明,该算法能在大频偏低信噪比的条件下完成定时捕获的任务,并且无需专门的训练符号,从而大大提高了系统传输的效率。

An Efficient Symbol Timing Estimation Algorithm for OFDM Systems

In this paper a new symbol timing estimation algorithm is proposed for OFDM systems. This algorithm utilizes inherent correlation property of two segments of information sequence to carry out accurate symbol timing estimation. The theory analysis and simulation show that the algorithm can complete timing acquisition under large frequency offset and low SNR. Furthermore it is no need of special training symbol, so the system' s transmission efficiency is increased largely.