| 一种低信噪比大多普勒频移下的直扩信号捕获方法 |
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| 引用本文： | 袁继兵,郑林华.一种低信噪比大多普勒频移下的直扩信号捕获方法[J].飞行器测控学报,2007,26(2):15-18. |
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| 作者姓名： | 袁继兵 郑林华 |
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| 作者单位： | 国防科技大学电子科学与工程学院,湖南长沙410073 |
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| 摘 要： | 提出了伪码相位一载波频率二维搜索伪码捕获结构在低信噪比大多普勒频移情况下捕获性能恶化的问题，给出了一种中频端简单数字处理算法的解决方案，并分析了该算法的性能。仿真表明，改进的伪码相位一载波频率二维搜索伪码捕获结构在低信噪比大多普勒频移情况下解决了捕获性能恶化的问题。
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| 关 键 词： | 直扩通信系统 低信噪比 大多普勒频移 伪码捕获 |
| 收稿时间： | 2006-09-21 |
| 修稿时间： | 2006-09-212006-11-06 |
A Pseudo Noise Code Acquisition Technology for Low SNR and Large Doppler Shift DSSS Systemes |
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| YUAN Ji-bing ,ZHENG Lin-hua.A Pseudo Noise Code Acquisition Technology for Low SNR and Large Doppler Shift DSSS Systemes[J].Journal of Spacecraft TT&C Technology,2007,26(2):15-18. |
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| Authors: | YUAN Ji-bing ZHENG Lin-hua |
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| Institution: | School of Electronic Science and Engineering, National University of Defense Technology, Changsha, Hunan Province 410073 |
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| Abstract: | This paper discusses deterioration of the performance of phase/carrier wave two-dimensional PN-Code acquisition structure in a low SNR and big Doppler offset environment. A scheme of intermediate frequency digital processing is proposed to solve this problem together with an analysis of the algorithmic performance. Simulation shows that the problem is solved by an improved phase/carrier wave two-dimensional PN-Code acquisition structure in a low SNR and big Doppler offset environment. |
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| Keywords: | DSSS Low SNR Large Doppler Shift PN Acquisition |
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