| 引用本文: | 王浩,雍少为,庄钊文.基于直接中频采样的数字化GPS码捕获电路分析.[J].国防科技大学学报,2001,23(2):79-83.[点击复制] |
| WANG Hao,YONG Shaowei,ZHUANG Zhaowen.Modeling and Analysis of Digital GPS Code Acquisition Circuit Based on Direct IF Sampling[J].Journal of National University of Defense Technology,2001,23(2):79-83[点击复制] |
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| 基于直接中频采样的数字化GPS码捕获电路分析 |
| 王浩, 雍少为, 庄钊文 |
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(国防科技大学 ATR国家重点实验室， 湖南 长沙 410073)
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| 摘要: |
| 文中提出了基于直接中频采样的数字化GPS接收机码捕获电路。在对其进行数学建模的基础上，分析了该电路的虚警概率、检测概率、载噪比与捕获速率的关系，并提出了GPS C/A码捕获数字系统的实现方案。数字化GPS接收机码捕获电路可以有效地提高捕获的成功率和抗干扰性能，也为提高接收机集成度，增加系统可靠性起到了重要作用。 |
| 关键词: 全球定位系统（GPS） 接收机 PN码捕获 |
| DOI： |
| 投稿日期：2000-11-09 |
| 基金项目:国家科技预研项目资助 |
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| Modeling and Analysis of Digital GPS Code Acquisition Circuit Based on Direct IF Sampling |
| WANG Hao, YONG Shaowei, ZHUANG Zhaowen |
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(ATR Key Lab Navigation and Position Section, National Univ. of Defence Technology, Changsha 410073，China)
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| Abstract: |
| A digital GPS PN code acquisition circuit based on direct IF sampling is presented. Based on the mathematics model of this circuit, the relations between searching rate, probabilities of false-alarm, probabilities of detection and input carrier-to-noise density ratio(C/N0) are analyzed. A digital system scheme based on the acquisition circuit is proposed. According to the result of the analysis the digital acquisition circuit can be adopted for improving acquiring performance and system reliability. |
| Keywords: Global Position System(GPS) receiver PN code acquisition |
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