| 联合载频和符号同步多普勒补偿方法 |
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| 引用本文： | 何成兵,黄建国,张群飞.联合载频和符号同步多普勒补偿方法[J].探测与控制学报,2010,32(5). |
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| 作者姓名： | 何成兵 黄建国 张群飞 |
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| 作者单位： | 西北工业大学航海学院; |
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| 基金项目： | 国家自然科学基金项目资助，西北工业大学基础研究基金项目资助 |
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| 摘 要： | 多普勒不仅造成宽带水声通信信号的载波频率偏移,而且引起码元符号的展宽或压缩。针对这一问题,提出一种适用于M元宽带扩频移动水声通信的多普勒补偿方法──联合载频和符号同步方法。该方法首先利用估计的载频对接收信号进行解调、低通滤波;其次,进行相关检测、估计与译码;最后根据相关峰位置对后续码元进行同步修正。仿真表明:该方法能够有效抑制由码元展宽或压缩而引起的同步误差累积效应,可用于水下航行器30 kn以内高速运动时的移动水声通信。
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| 关 键 词： | 移动水声通信 扩频 多普勒补偿 |
Joint Carrier Frequency and Symbol Synchronization Doppler Shift Compensation Method |
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| HE Chengbing,HUANG Jianguo,ZHANG Qunfei.Joint Carrier Frequency and Symbol Synchronization Doppler Shift Compensation Method[J].Journal of Detection & Control,2010,32(5). |
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| Authors: | HE Chengbing HUANG Jianguo ZHANG Qunfei |
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| Affiliation: | HE Chengbing,HUANG Jianguo,ZHANG Qunfei(College of Marine Engineering,Northwestern Polytechnical University,Xi'an 710072,China) |
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| Abstract: | Doppler effect causes not only carrier frequency offset,but also symbol expansion or compression for wideband acoustic communication signal.To solve this problem,a novel Doppler compensation method of joint carrier frequency and symbol synchronization for M-array wideband spread spectrum of mobile underwater acoustic communication was proposed in this paper.Firstly,the proposed method converted the receiver signal to base-band waveform via estimated carrier frequency.Secondly,it estimated and decoded the me... |
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| Keywords: | mobile underwater acoustic communication spread spectrum Doppler shift compensation |
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