| 基于叠加训练序列的稀疏水声OFDM信道估计 |
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| 引用本文： | 赵俊义,孟维晓,贾世楼. 基于叠加训练序列的稀疏水声OFDM信道估计[J]. 船舶与海洋工程学报, 2009, 8(1): 65-70. DOI: 10.1007/s11804-009-8015-2 |
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| 作者姓名： | 赵俊义 孟维晓 贾世楼 |
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| 作者单位： | 哈尔滨工业大学,通信技术研究所,黑龙江,哈尔滨,150001;哈尔滨工业大学,通信技术研究所,黑龙江,哈尔滨,150001;哈尔滨工业大学,通信技术研究所,黑龙江,哈尔滨,150001 |
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| 摘 要： | 针对稀疏多径的水声OFDM信道,提出了基于叠加训练序列的信道估计方法,能够提高带宽传输效率.在发送端的信息序列中叠加一个低功率的周期性训练序列,在不占用额外的信号带宽的情况下估计信道参数,未知的信息序列会对叠加训练序列的信道估计方法产生干扰,在本文中采用迭代方法提高估计性能.水声信道具有延时时间长,信道稀疏的特点,本文采用匹配跟踪的方法估计信道非零系数的位置,降低加性白噪声对信道估计的影响.仿真结果显示,本文的方法能达到很好的信道估计性能,同时能够降低OFDM的峰均比.
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| 关 键 词： | 信道估计 叠加训练序列 稀疏水声信道 |
Sparse underwater acoustic OFDM channel estimation based on superimposed training |
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| Jun-yi Zhao,Wei-xiao Meng,Shi-lou Jia. Sparse underwater acoustic OFDM channel estimation based on superimposed training[J]. Journal of Marine Science and Application, 2009, 8(1): 65-70. DOI: 10.1007/s11804-009-8015-2 |
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| Authors: | Jun-yi Zhao Wei-xiao Meng Shi-lou Jia |
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| Affiliation: | ZHAO Jun-yi,MENG Wei-xiao , JIA Shi-lou Communication Research Center,Harbin Institute of Technology,Harbin 150001,China |
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| Abstract: | A superimposed training(ST) based channel estimation method is presented that provides accurate estimation of a sparse underwater acoustic orthogonal frequency-division multiplexing(OFDM) channel while improving bandwidth transmission efficiency.A periodic low power training sequence is superimposed on the information sequence at the transmitter.The channel parameters can be estimated without consuming any extra system bandwidth,but an unknown information sequence can interfere with the ST channel estimatio... |
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| Keywords: | channel estimation superimposed training sparse underwater acoustic channel |
| 本文献已被 CNKI 维普 万方数据 SpringerLink 等数据库收录！ |
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