| 摘 要: 针对正交频分复用OFDM(Orthogonal Frequency Division Multiplexing)系统对频率偏移极其敏感的问 题，研究了基于训练序列的Schmidl频偏估计算法，提出了一种基于时域过采样的频率同步算法。通过软件仿真，得出 结论，提出的算法在信噪比高的情况下能基本不失真的复原发端数据，在信噪比低的情况下优势非常明显，发送端发送 的原始数据能够被很好地复原出来，同时该算法在频率资源利用率方面，在信号传输速率方面，都比原有算法有所提 高，在现实中实现方便。 |
| 关键词: 正交频分复用(OFDM)；同步；频率偏移；频偏估计 |
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中图分类号: TP301
文献标识码: A
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| 基金项目: 新疆工程学院院级基金项目《果蔬及其他农作物自动施灌系统研制》，项目编号：2016xgy171812；新疆科技厅项目《750KV型号LGJK300/50超高压扩径覆冰导线 的动力学模型及ANSYS Workbench模态仿真》，项目编号：2019D01A29. |
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| The Frequency Synchronization Algorithm Based on the Time Domain Oversampling in OFDM System |
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HAI Ling
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( Department of Electrical and Information, Xinjiang Institute of Engineering, Urumqi 830023, China)
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| Abstract: In order to solve the problem that Orthogonal Frequency Division Multiplexing (OFDM) is sensitive to frequency offset,after studying the Schmidl frequency offset estimation algorithm based on training sequence,the frequency synchronization algorithm based on time-domain oversampling is proposed in this paper.The simulation results show that the proposed algorithm can recover the original data of the sender in the case of low SNR.And the algorithm not only can improve the utilization rate of the frequency resource and signal transmission rate,but also it is easy to implement. |
| Keywords: Orthogonal Frequency Division Multiplexing(OFDM);synchronization;frequency offset;frequency offset estimation |
