| 用双曲线调频信号实现水声通信的频偏估计和同步 |
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| 引用本文： | 张学森,孔繁慧,冯海泓.用双曲线调频信号实现水声通信的频偏估计和同步[J].声学技术,2010,29(2):210-213. |
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| 作者姓名： | 张学森 孔繁慧 冯海泓 |
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| 作者单位： | 1. 中国科学院声学研究所东海研究站,上海,200032;中国科学院研究生院,北京,100049
2. 中国科学院声学研究所东海研究站,上海,200032 |
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| 摘 要： | 水声通信的信道带宽相对较窄,为实行高速通信,需要选择高频带利用率的传输方式。正交频分复用（Orthogonal Frequency Division Multiplexing,OFDM）技术允许子载波重叠,在水声通信中具有良好的应用前景。但OFDM的解调对于频率偏移和时间偏移非常敏感,而水声中的频率多普勒偏移相当大。通过仿真和实验表明：在信噪比较低的情况下,使用双曲线调频信号作为导频信号,可以准确地计算出频率偏移,同时实现数据传输的时间同步。
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| 关 键 词： | 水声通信 正交频分复用（OFDM） 双曲线调频信号 频率偏移 同步 |
| 收稿时间： | 2009/5/11 0:00:00 |
| 修稿时间： | 2009/8/30 0:00:00 |
Frequency offset estimation and synchronization of underwater acoustic communication with hyperbolic frequency modulation signal |
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| ZHANG Xue-sen,KONG Fan-hui and FENG Hai-hong.Frequency offset estimation and synchronization of underwater acoustic communication with hyperbolic frequency modulation signal[J].Technical Acoustics,2010,29(2):210-213. |
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| Authors: | ZHANG Xue-sen KONG Fan-hui and FENG Hai-hong |
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| Affiliation: | ZHANG Xue-sen1,2,KONG Fan-hui1,FENG Hai-hong1(1.Shanghai Acoustics Laboratory,Chinese Academy of Sciences,Shanghai 200032,China,2.Graduate University of Chinese Academy of Sciences,Beijing,100049,China) |
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| Abstract: | Due to the band-limited underwater acoustic(UWA) channels, it is a good way to make use of band-width-efficient modulation techniques for high-speed communication.Orthogonal Frequency Division Multiplexing(OFDM) modulation, in which the overlap of subcarriers is allowed, has very good application prospect.But demodu-lation of OFDM is very sensitive to frequency offset and synchronization;the former is often severe in UWA commu-nication because of Doppler phenomenon.Employing hyperbolic frequency modulation ... |
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| Keywords: | underwater acoustic communications OFDM hyperbolic frequency modulation signal frequency offset synchronization |
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