| GPS接收机中伪随机码快速捕获技术的研究 |
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| 引用本文： | 薛文芳,邵定蓉,李署坚. GPS接收机中伪随机码快速捕获技术的研究[J]. 北京航空航天大学学报, 2003, 29(6): 489-492 |
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| 作者姓名： | 薛文芳 邵定蓉 李署坚 |
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| 作者单位： | 北京航空航天大学 电子工程系 |
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| 摘 要： | 为缩短GPS接收机捕获伪随机码的时间,分析了与时域滑动相关的常规捕获方法;利用有效星历所提供的先验信息,对伪随机码的搜索范围进行压缩,缩短了伪随机码失锁重捕的时间;分析了采用FFT的快速捕获技术.仿真结果显示捕获速度可以得到显著提高.
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| 关 键 词： | 快速变换 频域分析 相关 多通道 全球定位系统 |
| 文章编号： | 1001-5965(2003)06-0489-04 |
| 收稿时间： | 2002-03-18 |
| 修稿时间： | 2002-03-18 |
Study on Technique of Fast Acquisition Pseudo Noise Code in GPS Receiver |
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| Xue Wenfang Shao Dingrong Li Shujian. Study on Technique of Fast Acquisition Pseudo Noise Code in GPS Receiver[J]. Journal of Beijing University of Aeronautics and Astronautics, 2003, 29(6): 489-492 |
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| Authors: | Xue Wenfang Shao Dingrong Li Shujian |
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| Affiliation: | Dept. of Electronic Engineering, Beijing University of Aeronautics and Astronautics |
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| Abstract: | In order to reduce the time of acquisition pseudo noise code in GPS receiver, the conventional acquisition method slide correlation in the time domain was analyzed. The searching range of pseudo noise code was narrowed utilizing to the information provided by epicheirema. The lost reacquisition time was shortened. The fast acquisition technique using FFT was analyzed. Simulation shows that the acquisition speed can be improved obviously. |
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| Keywords: | fast transformation frequency domain analysis correlation multi channel GPS |
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