| OFDM水声通信中基于SPM原理的载波频偏估计 |
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| 引用本文： | 何成兵,冉茂华,黄建国,陈志菲. OFDM水声通信中基于SPM原理的载波频偏估计[J]. 电声技术, 2011, 35(1): 56-59 |
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| 作者姓名： | 何成兵 冉茂华 黄建国 陈志菲 |
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| 作者单位： | 西北工业大学航海学院; |
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| 摘 要： | 水声通信中由水声信道的时变性或本地振荡器失配所引起的载波频偏(CFO)非常普遍,这使得正交频分复用(OFDM)在高速通信中的应用面临严重挑战.因为CFO破坏了OFDM子载波间的正交性,产生严重的子载波间干扰(ICI),从而使得系统无法工作.针对这一问题,提出了一种基于信号相位匹配(SPM)原理的OFDM载波频偏估计方法...
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| 关 键 词： | 水声通信 OFDM 相位匹配 载波频偏 |
Accurate Doppler Factor Estimation with Signal Phase-Matching for OFDM System |
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| HE Chengbing,RAN Maohua,HUANG Jianguo,CHEN Zhifei. Accurate Doppler Factor Estimation with Signal Phase-Matching for OFDM System[J]. Audio Engineering, 2011, 35(1): 56-59 |
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| Authors: | HE Chengbing RAN Maohua HUANG Jianguo CHEN Zhifei |
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| Affiliation: | (College of Marine,Northwest Polytechnical University,Xi′an 710072,China) |
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| Abstract: | The major problem in applying OFDM to underwater channels is that it is vulnerable to carrier frequency offset(CFO) caused by transceiver mismatch and/or Doppler shifts.And the loss of orthogonality due to the CFO effects must be compensated before the demodulation with discrete Fourier transform.A novel CFO estimation technique for OFDM communications is proposed over an underwater acoustic channel.The intrinsic structure information of OFDM signals is exploited to derive a CFO estimator based on signal-ph... |
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| Keywords: | underwater acoustic communication OFDM SPM carrier frequency offset |
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