| GPS数字中频信号仿真及捕获验证 |
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| 引用本文： | 王金刚.GPS数字中频信号仿真及捕获验证[J].重庆邮电学院学报(自然科学版),2010(2). |
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| 作者姓名： | 王金刚 |
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| 作者单位： | 重庆大学通信工程学院; |
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| 基金项目： | 重庆市科委资助项目(CSTC,2009AB2088)~~ |
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| 摘 要： | 为测试全球定位系统(global positioning system,GPS)软件接收机中GPS信号处理算法的功能,有必要对GPS信号进行仿真。在分析GPS数字中频信号数学模型的基础上,详细阐述了信号仿真的步骤并实现了GPS数字中频信号仿真器。在捕获算法中,分析了时域串行搜索捕获和频域并行搜索捕获算法的复杂度。与其他捕获算法相比,并行码相位捕获算法大大减小了复杂度。选择了捕获速度快的并行码相位搜索捕获算法对产生的中频信号进行验证,结果表明,仿真器可以为GPS信号处理算法提供可靠的信号源。
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| 关 键 词： | GPS信号 捕获 多普勒频移 C/A码相位 |
Simulation and acquisition validation of digital IF GPS signals |
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| WANG Jin-gang.Simulation and acquisition validation of digital IF GPS signals[J].Journal of Chongqing University of Posts and Telecommunications(Natural Sciences Edition),2010(2). |
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| Authors: | WANG Jin-gang |
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| Institution: | College of Communication Engineering;Chongqing University;Chongqing 400044;P.R.China |
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| Abstract: | In order to study the signal processing algorithm of the global positioning system(GPS)software receiver,it is necessary to simulate GPS signals for testing their functionality.Based on the analysis of mathematical model of digital intermediate frequency(IF)GPS signals,this paper studies the approach of both simulation and implementation of digital IF GPS signal.During the acquisition,the comparative complexity between the time-domain serial search acquisition algorithm and frequency-domain parallel search ... |
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| Keywords: | GPS signal acquisition Doppler frequency shifts phase of C/A code |
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