一种利用重复序列的OFDM频率同步新方法

严春林; 李少谦; 唐友喜; 罗霄; 房家奕

一种利用重复序列的OFDM频率同步新方法

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出版历程
- 收稿日期: 2004-04-28
- 修回日期: 2004-11-03
- 刊出日期: 2005-10-19

A New OFDM Frequency Offset Estimation Method Using Repeated Sequences

摘要

摘要: 该文提出了一种利用重复序列构成的训练序列进行OFDM频率同步的新方法。它通过作两次频率同步，先是相隔较近的数据作相关，得出频率偏移值，纠正此频率偏移后，再间隔较远的数据作相关，得出较精确的频率偏移值。新方法有估计范围大和精度高的双重优点。AWGN和Rayleigh信道下的仿真验证了算法的有效性。
- OFDM;频率同步;重复序列
Abstract: In this paper a new frequency offset estimation method using repeated sequences is introduced where two steps are involved. In the first step the span of the correlation data is small and a larger estimation range can be achieved. After the frequency offset is compensated, a larger correlation data span is chosen and a precise estimation can be got. Large estimation range and precise estimation can be acquired in the new method. Simulations in AWGN channel and Rayleigh channel verify the validity of the new algorithm.

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