| 采用导频符号的短波宽带OFDM系统的同步算法 |
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| 引用本文： | 阚春荣,王庭昌.采用导频符号的短波宽带OFDM系统的同步算法[J].解放军理工大学学报,2005,6(5):10-14. |
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| 作者姓名： | 阚春荣 王庭昌 |
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| 作者单位： | [1]解放军理工大学通信工程学院,江苏南京210007 [2]总参第63研究所,江苏南京210007 |
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| 摘 要： | 为了研究宽带短波信道上OFDM系统的同步算法,针对短波信道分析了已有同步算法在低信噪比条件下的不足,提出了一种采用PN序列调制导频符号的同步方案.在接收端,接收数据经过FFT后,利用PN序列优异的相关特性,实现了低信噪比条件下的时间和频率同步.仿真结果表明,该算法在恶劣的短波信道上具有良好的性能.
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| 关 键 词： | 正交频分复用 同步 伪随机(PN)序列 低信噪比 导频符号 |
| 文章编号： | 1009-3443(2005)05-0414-05 |
| 收稿时间： | 2004-11-02 |
| 修稿时间： | 2004年11月2日 |
Synchronization algorthm based on pilot symbols for wideband
OFDM in HF communications |
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| KAN Chun-rong and WANG Ting-chang.Synchronization algorthm based on pilot symbols for wideband
OFDM in HF communications[J].Journal of PLA University of Science and Technology(Natural Science Edition),2005,6(5):10-14. |
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| Authors: | KAN Chun-rong and WANG Ting-chang |
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| Institution: | KAN Chun-rong , WANG Ting-chang (1. Institute of Communications Engineering, PLA Univ. of Sci. |
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| Abstract: | Synchronization algorithms for wideband OFDM in HF communications were discussed. Firstly, the disadvantages of traditional synchronization algorithms under low SNR HF channel were analyzed. Then, a novel synchronization algorithm based on pilot symbols modulated by a PN sequence was proposed. This algorithm utilizes the perfect autocorrelation of PN sequence in frequency domain and can obtain the time and frequency synchronization under low SNR. Simulation results show that the algorithm can work well in noisy HF channels. |
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| Keywords: | orthogonal frequency division multiplexing synchronization PN sequence low SNR pilot symbol |
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