| 一种改进的GPS微弱信号捕获方法 |
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| 引用本文： | 胡丛玮, 李晓玲, 安雷. 一种改进的GPS微弱信号捕获方法[J]. 武汉大学学报 ( 信息科学版), 2008, 33(8): 821-823. |
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| 作者姓名： | 胡丛玮 李晓玲 安雷 |
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| 作者单位： | 1同济大学测量与国土信息工程系,上海市四平路1239号200092;2现代工程测量国家测绘局重点实验室,上海市四平路1239号,200092 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 介绍了GPSL1载波中C/A码的捕获算法,以快速傅立叶变换为基础,采用相关积分和非相关积分对较长的信号进行处理,实现对GPS微弱信号的捕获。为验证这一算法,利用一组在室内采集的GPSL1C/A码IF数据,采用一般的信号捕获方法和改进的信号捕获方法分别进行了处理。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。
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| 关 键 词： | GPS软件接收机 信号捕获 信号跟踪 相关积分 |
| 收稿时间： | 2008-06-15 |
| 修稿时间： | 2008-06-15 |
An Improved Algorithm for Acquisition of Weak Signal in a Software GPS Receiver |
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| HU Congwei, LI Xiaoling, AN Lei. An Improved Algorithm for Acquisition of Weak Signal in a Software GPS Receiver[J]. Geomatics and Information Science of Wuhan University, 2008, 33(8): 821-823. |
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| Authors: | HU Congwei LI Xiaoling AN Lei |
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| Affiliation: | 1Department of Surveying and Geo-informatics,Tongji University,1239 Siping Road,Shanghai 200092,China;2Central Laboratory of National Mapping Bureau about Modern Engineering Surveying,1239 Siping Road,Shanghai 200092,China |
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| Abstract: | A method for capturing GPS L1 C/A code signal is introduced.Based on FFT,the coherent and non-coherent processing with longer data set can be used to capture GPS weak signal.A data set collected indoors is used to verify the algorithm,and the result shows that the improved method can capture the GPS weak signal successfully. |
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| Keywords: | GPS software receiver signal capturing signal tracking coherent processing |
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