| GPS数字中频信号的模拟 |
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| 引用本文： | 孙慧萍,任青,杨文平.GPS数字中频信号的模拟[J].雁北师范学院学报,2012(6):17-19,25. |
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| 作者姓名： | 孙慧萍 任青 杨文平 |
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| 作者单位： | 山西大同大学物理与电子科学学院,山西大同037009 |
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| 摘 要： | 研究了GPS软件接收机中GPS数字中频信号模拟的基本原理。首先，介绍了GPS信号的调制过程；其次，分析了C／A码的产生原理，并分析了信号的数字化原理；再次，讨论了GPS信号中夹杂的噪声及GPS数字中频信号的模拟过程；最后，针对不同环境分别对GPS数字中频信号频谱进行了仿真实验。结果表明，其频谱比较准确。既能从图中看出调制过程，也能够求出其载波频率，为以后的研究奠定了重要的基础。
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| 关 键 词： | GPS 数字中频信号 数字化 C A码 采样频率 |
GPS Digital IF Signal Simulation |
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| SUN Hui-ping,REN Qing,YANG Wen-ping.GPS Digital IF Signal Simulation[J].Journal of Yanbei Teachers College,2012(6):17-19,25. |
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| Authors: | SUN Hui-ping REN Qing YANG Wen-ping |
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| Institution: | (School of Mathematics and Computer Science, Shanxi Datong University, Datong Shanxi, 037009) |
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| Abstract: | This article studies the basic principle of the generation of digital intermediate frequency signal in GPS software receiver.Firstly, introduce the modulation process of GPS signal, secondly, analyze the principle about C/A and process of signal digitization.Thirdly, discusses the noise, which exists in GPS signal, so as simulation process of GPS digital intermediate frequency signal.Finally, according to different situations, simulation experiments are made respectively on the GPS digital intermediate frequency signal spectrum; The simulation results show that： the spectrum is quite accurate; the modulation process can be seen from the graph, as well as carrier frequency. Come to the conclusion that this is a very important basic theory for the further research. |
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| Keywords: | GPS digital Intermediate frequency signal digital C/A code sampling frequency |
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