摘要
提出一种新型的正交频分复用(OFDM)系统同步估计算法。采用差分编码,可以在不需要信道状态信息情况下,利用连续接收的两个OFDM符号进行频偏估计,适用于突发通信。该算法只需要一个训练序列,就可以有效地进行频偏估计,并且还可以进行符号定时估计。在短波宽带信道下的仿真结果表明,与传统算法相比,提出的算法提高了频偏估计精度。
A new frequency offset estimation algorithm for orthogonal frequency division multiplexing （OFDM） system was proposed. Using differential encoding, frequency offset can be estimated by using two received OFDM symbols without requiring channel state information which makes it suitable for burst communication. Requiting only one training sequence the algorithm can estimate frequency offset efficienfly. While the timing synchronization can be obtained by using the training symbol. Through the wideband HF channel, the simulation results show that, the proposed method improved the accuracy of frequency offset estimation comparing with conventional algorithm.
出处
《信息技术》
2010年第2期61-64,共4页
Information Technology
关键词
正交频分复用
频偏估计
差分编码
训练序列
OFDM
frequency offset estimation
differential encoding
training sequence
