| 一种基于数据辅助的OFDM系统符号同步算法 |
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| 引用本文： | 高燕, 王炎, 尤肖虎. 一种基于数据辅助的OFDM系统符号同步算法[J]. 电子与信息学报, 2008, 30(1): 44-47. doi: 10.3724/SP.J.1146.2006.00836 |
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| 作者姓名： | 高燕 王炎 尤肖虎 |
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| 作者单位： | 东南大学移动通信国家重点实验室,南京,210096 |
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| 摘 要： | 该文提出了一种改进的OFDM系统符号同步算法。在集相关法估计出FFT有效采样窗的基础上，加以数据的辅助，将恢复后的符号序列再次进行OFDM调制并与接收信号作相关，能够求出符号到达的准确时刻。这种基于数据辅助的方法提高了估计过程中的信噪比。仿真结果表明，该方法在多径衰落信道下能获得较好的定时同步性能。
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| 关 键 词： | OFDM 符号同步 循环前缀 多径衰落信道 |
| 文章编号： | 1009-5896（2008）01-0044-04 |
| 收稿时间： | 2006-06-13 |
| 修稿时间： | 2006-10-30 |
A Data-Aided Symbol Synchronization Algorithm for OFDM Systems |
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| Gao Yan, Wang Yan, You Xiao-hu. A Data-Aided Symbol Synchronization Algorithm for OFDM Systems[J]. Journal of Electronics & Information Technology, 2008, 30(1): 44-47. doi: 10.3724/SP.J.1146.2006.00836 |
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| Authors: | Gao Yan Wang Yan You Xiao-hu |
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| Affiliation: | National Mobile Communications Research Laboratory, Southeast University, Nanjing 210096, China |
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| Abstract: | An improved symbol synchronization algorithm for OFDM systems is proposed in this paper. Based on the assemble correlation method which estimates the available sampling window for FFT, the recovered binary serial is modulated for the second time. By computing the correlation of received signal and the twice modulated signal, the correct symbol timing is obtained. This data-aided method increases the SNR during the estimation. Simulation results demonstrate that the proposed algorithm has good timing synchronization performance over multi-path fading channel. |
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| Keywords: | OFDM Symbol synchronization Cyclic-prefix Multi-path fading channel |
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