| 基于软件实现GPS信号捕获以及获取精确载波频率 |
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| 引用本文： | 高洁雯,柳林涛,杨光.基于软件实现GPS信号捕获以及获取精确载波频率[J].测绘科学,2007,32(5):14-16. |
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| 作者姓名： | 高洁雯 柳林涛 杨光 |
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| 作者单位： | 中国科学院,大地测量与地球物理研究所,武汉,430077;中国科学院研究生院,北京,100049;中国科学院,大地测量与地球物理研究所,武汉,430077;中国科学院光电研究院,北京,100080 |
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| 摘 要： | 捕获模块是实现GPS软件接收机的重要组成部分。本文立足于通过软件的方法实现GPS信号的捕获,由捕获的结果得到准确而精度更高的载波频移,从而对降低跟踪环路的设计复杂性有利。作者先用GPS串行搜索捕获和并行搜索捕获这两种传统的方法对GPS信号进行捕获,在此基础上尝试采用一种降低频率搜索步长并结合二次曲线拟合的方法以获取高精度的载波频率,进而更好地提高整个捕获准确性以及精度,经过分析后,得到了一些较有意义的结论。
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| 关 键 词： | 串行 并行 FFT 载波频移 曲线拟合 |
| 文章编号： | 1009-2307（2007）05-0014-03 |
| 修稿时间： | 2006-09-20 |
The acquisition of GPS signal and the precise carrier frequency based on software approach |
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| GAO Jie-wen,LIU Lin-tao,YANG Guang.The acquisition of GPS signal and the precise carrier frequency based on software approach[J].Science of Surveying and Mapping,2007,32(5):14-16. |
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| Authors: | GAO Jie-wen LIU Lin-tao YANG Guang |
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| Abstract: | The acquisition module is an important part of the whole GPS software receiver.The main purpose of the paper is to get accurate and precise GPS carrier frequency shift.Firstly,the comparison is done between the two conventional way to capture signal,which are the serial search way and parallel way.Secondly,a new way of conic fit is experimented to get more precise carrier frequency,which is significant for carry out.Finally,some useful results are gained. |
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| Keywords: | serial parallel FFT carrier frequency shift conic fit |
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