| GPS微弱信号捕获算法 |
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| 引用本文： | 蔡秀雄,刘瑞芹,张凤元. GPS微弱信号捕获算法[J]. 火力与指挥控制, 2009, 34(8) |
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| 作者姓名： | 蔡秀雄 刘瑞芹 张凤元 |
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| 作者单位： | 北京化工大学信息科学与技术学院,北京,100029;北京化工大学信息科学与技术学院,北京,100029;北京化工大学信息科学与技术学院,北京,100029 |
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| 摘 要： | 捕获是GPS接收机信号处理中的关键部分,在微弱信号情况下,FFT快速捕获等传统方法不能很好地捕获到卫星信号,将采用一种改进的方法--相关积分与批式捕获相结合的方法进行捕获研究.并对一组GPS实测数据信息,分别采用以上两种方法对其进行捕获仿真.结果显示,采用改进的方法捕获到了较微弱的GPS 信号,提高了接收机的灵敏度,并能有效避免由导航数据位翻转造成的误捕获.
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| 关 键 词： | 全球定位系统 微弱信号捕获 批式捕获 相关积分 |
Algorithm for GPS Weak Signal Acquisition |
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| CAI Xiu-xiong,LIU Rui-qin,ZHANG Feng-. Algorithm for GPS Weak Signal Acquisition[J]. Fire Control & Command Control, 2009, 34(8) |
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| Authors: | CAI Xiu-xiong LIU Rui-qin ZHANG Feng- |
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| Affiliation: | College of Information Science and Technology;Beijing University of Chemical Technology;Beijing 100029;China |
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| Abstract: | Signal acquisition is the key phase of GPS signal processing.Sometimes,GPS signals are too weak to be received or processed by t raditional methods. This paper presents the block and coherent processing acquisition method.A data set collected is used to verify the algorithm,and the result shows that the improved method can capture the GPS weak signal successfully.And it can solve the problem brought by navigation data signal t ransition during the correlation process. |
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| Keywords: | global positioning system weak signal acquisition block acquisition coherent integration |
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