一种新型OFDM系统频率和时间同步算法

A New Frequency and Symbol Synchronization Algorithm for OFDM System

提出了一种正交频分复用(OFDM)系统的频率和时间同步算法。该算法利用未经过前一个符号的延迟扩展干扰的循环前缀部分来进行频率偏移和时间偏移的估计。因此,该算法有效地降低了ISI的影响。最后,该算法在存在高斯白噪声和多径信道的条件下进行了仿真,仿真结果表明这种算法有很好的估计性能。

In this paper, a new frequency and symbol synchronization algorithm for OFDM systems is proposed. The proposed frequency and symbol synchronization are estimated by using GI（guard interval） section,which is not disturbed by delay spread of last OFDM symbol,Thus, the proposed algorithm is effective in reducing the influence of ISI（inter symbol interference）. At last, performance of the proposed method is simulated under AWGN and multipath channel model. The result demonstrated that the proposed method has good performance.