| 基于码部分相关性的GPS信号捕获算法 |
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| 引用本文： | 武建锋,胡永辉.基于码部分相关性的GPS信号捕获算法[J].大连海事大学学报(自然科学版),2009,35(1). |
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| 作者姓名： | 武建锋 胡永辉 |
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| 作者单位： | 武建锋,WU Jian-feng(中国科学院国家授时中心,陕西,临潼,710600;中国科学院研究生院,北京,100049);胡永辉,HU Yong-hui(中国科学院国家授时中心,陕西,临潼,710600)
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| 基金项目： | 国家高技术研究发展计划(863计划)，中国科学院青年人才专项基金 |
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| 摘 要： | 为提高GPS信号的捕获速度,减少捕获时间,从C/A码的部分相关性出发,提出一种基于1024点FFT的码相位捕获算法.将输入数据按1024点进行分段,对每段1024点分别采用FFT算法进行捕获.仿真结果表明,该算法既保证了码相捕获精度,又有效降低了计算量,提高了捕获速度.可以利用现有的1024点FFT核完成设计,对系统硬件要求较低.该算法对GLONASS、GALILEO、北斗导航系统的信号捕获也具有很好的借鉴作用.
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| 关 键 词： | GPS信号 捕获 C/A码 部分相关性 快速傅里叶变换(FFT) |
Acquisition algorithm for GPS signal based on partial correlation of C/A code |
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| WU Jian-feng,HU Yong-hui.Acquisition algorithm for GPS signal based on partial correlation of C/A code[J].Journal of Dalian Maritime University,2009,35(1). |
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| Authors: | WU Jian-feng HU Yong-hui |
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| Institution: | WU Jian-feng1,2,HU Yong-hui1(1.National Time Service Center,The Chinese Academy of Sciences,Lintong 710600,China,2.Graduate School of the Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | To improve the acquisition speed for GPS signal while decreasing the acquisition time,an phase acquisition algorithm based on 1024 fast Fourier transform (FFT) was developed considering the partial correlation of the C/A code.The input data were done in subsection in every 1024 points,and the coarse C/A code phase was calculated by using 1024 FFT.Simulation results show that the algorithm guarantees computational precision,while decreasing the computational complexity and improving acquisition speed.The des... |
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| Keywords: | GPS signal acquisition C/A code partial correlation fast Fourier transform(FFT) |
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