| 一种水声OFDM的抗多径同步算法 |
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| 引用本文： | 袁兆凯,隋天宇,李宇,黄海宁.一种水声OFDM的抗多径同步算法[J].应用声学,2011,30(1):19-25. |
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| 作者姓名： | 袁兆凯 隋天宇 李宇 黄海宁 |
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| 作者单位： | 中国科学院声学研究所,北京,100190 |
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| 基金项目： | "863计划项目，国家自然科学基金 |
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| 摘 要： | 水声信道普遍存在多径效应,致使水声正交频分复用(OFDM)通信系统的同步算法经常给出误差较大甚至错误的同步点。为了完成精确的同步,本文提出一种基于恒幅度零自相关序列以及在信号开始插入两个同样训练信号的联合同步算法,系统通过粗同步和细同步两个过程完成信号开始时刻的精确定位。仿真分析和湖试结果表明,本算法能够在多径信道下准确找到信号开始时刻。
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| 关 键 词： | 多径 正交频分复用 同步 |
A multi-path resistance method of synchronization on OFDM underwater communication system |
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| YUAN Zhaokai,SUI Tianyu,LI yu and HUANG Haining.A multi-path resistance method of synchronization on OFDM underwater communication system[J].Applied Acoustics,2011,30(1):19-25. |
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| Authors: | YUAN Zhaokai SUI Tianyu LI yu and HUANG Haining |
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| Institution: | (Institute of Acoustic,Chinese Academy of Sciences,Beijing 100190) |
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| Abstract: | The multi-path channel brings great challenges for orthogonal frequency division system(OFDM) on underwater communication.It is difficult to get the exact time with the general synchronization method.The proposed method is arranged using the constant amplitude and zero autocorrelation(CAZAC) sequence as the fine synchronization and the SC’s method as the coarse synchronization.Through the computer simulation and the lake experiment,the method is shown to be a fine synchronization of underwater OFDM both on precision of synchronization and the amount of calculation. |
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| Keywords: | Multi-path OFDM Synchronization |
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