| GalileoE1信号捕获算法研究 |
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| 引用本文： | 肖宇扬. GalileoE1信号捕获算法研究[J]. 科学技术与工程, 2011, 11(10): 2225-2228,2233 |
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| 作者姓名： | 肖宇扬 |
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| 作者单位： | 上海交通大学,航空航天学院,上海,200240 |
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| 摘 要： | 作为GPS之外的一种全球卫星导航系统,Galileo有着自己当前独有的调制方式,这种新的调制引入了子载波分量并改变了自相关函数的性质,常用的GPS捕获算法在运用中将遇到问题,针对这一状况,提出了基于FFT循环相关的改进算法,先缩小了频率搜索范围,再对子载波及自相关函数的多峰性进行处理,并用实际数据检验,结果表明新算法有效。
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| 关 键 词： | 伽利略 子载波 多普勒 自相关函数 |
| 收稿时间： | 2011-01-03 |
| 修稿时间： | 2011-02-20 |
Research on the acquisition algorithm of Galileo E1 signal |
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| Xiao yu-yang. Research on the acquisition algorithm of Galileo E1 signal[J]. Science Technology and Engineering, 2011, 11(10): 2225-2228,2233 |
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| Authors: | Xiao yu-yang |
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| Affiliation: | (School of Aeronautics & Astronautics Shanghai Jiaotong University,Shanghai 200240,P.R.China) |
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| Abstract: | As a kind of new Global satellite navigation system beside GPS, Galileo has its own unique modulation at the present time, which takes in the parameter(sub-carrier) and changes the function of autocorrelation, because of this, commonly used acquisition algorithm will encounter the obstacle. The strategy based on FFT is proposed to solve the problem that concerns subcarrier and multi-peak of the autocorrelation function after reducing the Doppler searching area, it is verified by testing the real data. |
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| Keywords: | Galileo subcarrier Doppler autocorrelation funtion |
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