| 一种基于DFT时域插值的OFDM水声信道估计改进方法 |
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| 引用本文： | 杨波,朱敏,武岩波,孙晓艳.一种基于DFT时域插值的OFDM水声信道估计改进方法[J].应用声学,2012,31(5):352-357. |
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| 作者姓名： | 杨波 朱敏 武岩波 孙晓艳 |
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| 作者单位： | 中国科学院研究生院;中国科学院声学研究所海洋声学技术实验室;西安建筑科技大学信息与控制工程学院 |
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| 摘 要： | 信道估计作为OFDM通信系统中的重要部分,其性能关系到整个系统的误比特率。本文提出了一种基于DFT时域插值的信道估计改进方法,用于OFDM水声通信系统。该方法利用噪声门限抑制多径之间的信道估计噪声,计算简单,达到较好的信道估计效果。对该方法进行了理论分析,仿真实验以及海试。在海试中得到传输距离2km,有效数据率2.8kbit/s,证明该方法可以用于中短程浅海水声通信。
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| 关 键 词： | 正交频分复用 水声通信 信道估计 海试 |
| 收稿时间： | 2012/2/14 0:00:00 |
Channel estimation algorithms based on DFT for Orthogonal Frequency Division Multiplexing system |
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| YANG Bo,ZHU Min,WU Yanbo and SUN Xiaoyan.Channel estimation algorithms based on DFT for Orthogonal Frequency Division Multiplexing system[J].Applied Acoustics,2012,31(5):352-357. |
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| Authors: | YANG Bo ZHU Min WU Yanbo and SUN Xiaoyan |
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| Institution: | 1 The Graduate School of The Chinese Academy of Sciences,Beijing 100049)(2 Ocean Acoustic Technique Lab,Institute of Acoustics,Chinese Academy of Sciences,Beijing 100190)(3 School of Information and Control Engineering,Xi’an University of Architecture and Technology,Xi’an 710055) |
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| Abstract: | A channel estimation algorithm for Orthogonal Frequency Division Multiplexing (OFDM) acoustic communication system is proposed. The algorithm is based on discrete Fourier transform (DFT). The algorithm is computational efficient. Theoretical analysis, computer simulation, and a sea trial have been finished. The system achieved a 2.8 kbit/s effective data rate at distances up to 2 km, which proved the algorithm can be used for middle/short range acoustic communication in shallow sea. |
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| Keywords: | Orthogonal frequency division multiplexing Acoustic communication Channel estimation algorithms Sea trial |
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