| 一种全球定位系统弱信号捕获策略 |
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| 引用本文： | 梁涛涛,杨 春,吴军伟,王 明. 一种全球定位系统弱信号捕获策略[J]. 太赫兹科学与电子信息学报, 2014, 12(5): 682-687 |
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| 作者姓名： | 梁涛涛 杨 春 吴军伟 王 明 |
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| 作者单位： | 中国工程物理研究院电子工程研究所,四川绵阳,621999 |
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| 摘 要： | 信号捕获是目前广泛应用的数字全球定位系统(GPS)接收机的重要部分,弱信号条件下的信号捕获过程是目前GPS接收机算法研究的重点。本文分析和比较了2种经典捕获检测策略(TONG捕获策略及NM捕获策略)的性能,并针对弱信号条件下GPS信号捕获的特点,提出了一种适用于弱信号条件下的捕获检测策略—双门限搜索检测策略。理论分析和仿真说明该策略在弱信号条件下具有较好的性能。
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| 关 键 词： | 全球定位系统 信号捕获 弱信号 捕获策略 |
| 收稿时间： | 2013-10-10 |
| 修稿时间： | 2013-12-30 |
An acquisition strategy of Global Positioning System weak signal |
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| LIANG Tao-tao,YANG Chun,WU Jun-wei and WANG Ming. An acquisition strategy of Global Positioning System weak signal[J]. Journal of Terahertz Science and Electronic Information Technology, 2014, 12(5): 682-687 |
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| Authors: | LIANG Tao-tao YANG Chun WU Jun-wei WANG Ming |
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| Affiliation: | LIANG Tao-tao;YANG Chun;WU Jun-wei;WANG Ming;Institute of Electronic Engineering,China Academy of Engineering Physics; |
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| Abstract: | Acquisition is a very important part of digital GPS receiver. The acquisition of weak GPS signal is a key point of the research of GPS algorithm. Two classic acquisition strategies, TONG strategy and NM strategy, are analyzed and compared. Considering the specialty of weak signal condition, a new acquisition strategy named Double Threshold(DT) strategy is proposed. The analysis and simulation indicate that it performs well under weak signal condition. |
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| Keywords: | Global Positioning System signal acquisition weak signal acquisition strategy |
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