| 正交频分复用水声通信系统多普勒频移快速估计 |
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| 引用本文： | 郭铁梁,赵旦峰,杨大伟.正交频分复用水声通信系统多普勒频移快速估计[J].吉林大学学报(工学版),2013,43(3):813-818. |
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| 作者姓名： | 郭铁梁 赵旦峰 杨大伟 |
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| 作者单位： | 1. 哈尔滨工程大学,信息与通信工程学院,哈尔滨150001;黑龙江科技学院理学院,哈尔滨150027
2. 哈尔滨工程大学,信息与通信工程学院,哈尔滨150001 |
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| 基金项目： | 黑龙江省自然科学基金项目 |
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| 摘 要： | 对于高速实时正交频分复用水声通信系统,传统的多普勒频移估计方法通常具有较高的算法复杂度。因此本文提出了一种对于多普勒频移估计的快速算法。首先采用对接收信号进行过采样和线性插值的方法进行采样率的转换,再结合多普勒展缩因子候选值的方法进行多普勒频移的估计。仿真结果表明:本文算法在保证系统性能的同时,可以大幅度地减小接收机的计算量,适用于高速实时水声通信系统。
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| 关 键 词： | 通信技术 正交频分复用 多普勒频移 采样率转换 展缩因子 水声通信系统 |
Efficient Doppler estimation for UWA OFDM systems |
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| GUO Tie-liang,ZHAO Dan-feng,YANG Da-wei.Efficient Doppler estimation for UWA OFDM systems[J].Journal of Jilin University:Eng and Technol Ed,2013,43(3):813-818. |
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| Authors: | GUO Tie-liang ZHAO Dan-feng YANG Da-wei |
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| Affiliation: | 1(1.College of Information and Communication Engineering,Harbin Engineering University,Harbin 150001;2.Department of Science,Heilongjiang Institute of Science and Technology,Harbin 150027) |
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| Abstract: | Traditional Doppler algorithm is not robust to the fast-varying Under Water Acoustic(UWA)Orthogonal Frequency Division Multiplying(OFDM) systems.To overcome the shortcoming,an efficient Doppler estimation algorithm was proposed for the system.First,the sample rate conversion was completed using oversampling and linear interpolation methods.Then,the accurate Doppler shift was acquired by combining the candidate value of Doppler factor.Simulation results show that the proposed algorithm can not only ensure the system performance,but also reduce the computational load of the receiver.Therefore,it is suitable for high-speed real-time UWA OFDM systems. |
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| Keywords: | communication technology orthogonal frequency division multiplexing(OFDM) Doppler shift sample rate conversion Doppler factor underwater acoustic communication(UWA)systems |
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