| OFDM时频捕获的联合算法 |
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| 引用本文： | 雷俊,吴乐南.OFDM时频捕获的联合算法[J].电子与信息学报,2006,28(3):400-403. |
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| 作者姓名： | 雷俊 吴乐南 |
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| 作者单位： | 东南大学无线电工程系,南京,210096 |
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| 摘 要： | 该文提出了一种OFDM时频捕获的联合算法:利用周期前缀的相关性实现符号粗同步和小数频偏的纠正，并在帧头符号插入差分导频可同时完成帧同步和整数频偏估计。在中短波信道的仿真结果验证了该算法的准确性和实用性。
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| 关 键 词： | 正交频分复用 同步 符号同步 帧同步 频率同步 |
| 文章编号： | 1009-5896（2006）03-0400-04 |
| 收稿时间： | 2004-06-03 |
| 修稿时间： | 2004-10-29 |
A Joint Time and Frequency Acquisition Algorithm for OFDM Systems |
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| Lei Jun,Wu Le-nan.A Joint Time and Frequency Acquisition Algorithm for OFDM Systems[J].Journal of Electronics & Information Technology,2006,28(3):400-403. |
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| Authors: | Lei Jun Wu Le-nan |
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| Affiliation: | Department of Radio Eng., Southeast Univ., Nanjing 210096, China |
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| Abstract: | A combined time and frequency acquisition algorithm for OFDM systems is derived in this paper. The proposed technique estimates the symbol beginning and the fractional frequency offset with the periodicity of Cyclic Prefix (CP), and simultaneously achieves the frame synchronization and the integral frequency offset correction based on differential pilot subcarriers in the first symbol of a transmission frame. Simulation results in MW/SW channels indicate the accuracy and practicability of this approach. |
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| Keywords: | OFDM Synchronization Symbol synchronization Frame synchronization Frequency synchronization |
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