| GPS基带信号源的数字模拟实现 |
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| 引用本文： | 田琨,聂磊.GPS基带信号源的数字模拟实现[J].航天控制,2009,27(4). |
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| 作者姓名： | 田琨 聂磊 |
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| 作者单位： | 北京航天自动控制研究所,北京,100854 |
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| 摘 要： | 首先对GPS信号产生原理进行了分析,然后给出了一种基带数字信号源的产生方法,即用码发生器产生伪随机码,先和导航数据进行调制,再调制上用DDS产生的载波信号,最终形成一颗或多颗GPS卫星信号.该方法用FPGA实现,不仅可以模拟GPS卫星信号的特性,而且考虑到调试接收机的动态捕获性能,信号源中还模拟了信号在运动状态下的情况.该方法为接收机基带信号处理部分的调试节省了大量的时间,针对基带部分提供信号源,减少了调试中其他因素(例如射频部分)的错误而带来的干扰.
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| 关 键 词： | 伪随机码 载波DDS 调制 |
A Method of Simulating Digital GPS Baseband Signal |
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| TIAN Kun,NIE Lei.A Method of Simulating Digital GPS Baseband Signal[J].Aerospace Control,2009,27(4). |
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| Authors: | TIAN Kun NIE Lei |
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| Institution: | TIAN Kun NIE Lei Beijing Aerospace Automatic Control Institute,Beijing 100854,China |
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| Abstract: | The thesis focuses all the attention on finding a solution to simulate GPS baseband signal,i.e.pseudocode generated by code-generator modulates with navigation data,then modulates with carrier generated by DDS.This solution can simulate several GPS satellites to generate GPS baseband signal through a digital emulation method in FPGA.Considering debug the dynamic capture performance of GPS receiver,this solution also simulates the condition that the GPS receiver is moving.By this digital simulation of GPS ba... |
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| Keywords: | GPS |
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