| 基于正交频分复用的水声通信中克服频率偏移影响的方法 |
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| 引用本文： | 朱彤,桑恩方. 基于正交频分复用的水声通信中克服频率偏移影响的方法[J]. 应用声学, 2005, 24(2): 114-118 |
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| 作者姓名： | 朱彤 桑恩方 |
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| 作者单位： | 哈尔滨工程大学水声工程学院,哈尔滨,150001 |
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| 摘 要： | OFDM(正交频分复用)是一种适合于在频率选择性衰落信道中进行高速传输的技术。水下信 道中存在着严重的多普勒频率偏移,限制了这种技术在水下的应用。本文分析了频率偏移对OFDM 系统性能的影响,提出了利用循环前缀补偿频率偏移引起的相位偏移方法来克服频偏的影响。试验 证明了这种方法的有效性。
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| 关 键 词： | OFDM 频率偏移 循环前缀 子载波 |
A method of overcoming the effect of frequency shift in underwater acoustic communication based on OFDM |
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| ZHU Tong and SANG En-Fang. A method of overcoming the effect of frequency shift in underwater acoustic communication based on OFDM[J]. Applied Acoustics(China), 2005, 24(2): 114-118 |
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| Authors: | ZHU Tong and SANG En-Fang |
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| Affiliation: | College of Underwater Acoustics Engineering, Harbin Engineering University, Harbin 150001;College of Underwater Acoustics Engineering, Harbin Engineering University, Harbin 150001 |
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| Abstract: | OFDM (Orthogonal Frequency Division Multiplexing) is suitable for communication in frequency selective fading channels. Due to the severe Doppler shift, the application of OFDM in underwater acoustic channel is limited. In this paper, the effect of frequency offset on the performance of OFDM system is analyzed. A method is given for compensating the phase shift induced by the frequency shift using cyclic prefix. The effectiveness of the method is experimentally tested. |
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| Keywords: | OFDM Frequency shift Cyclic prefix Subcarrier |
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