| 高灵敏度GPS导航算法分析 |
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| 引用本文： | 许仕龙,李斌,李哲,田爱国. 高灵敏度GPS导航算法分析[J]. 无线电工程, 2011, 41(10): 37-39 |
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| 作者姓名： | 许仕龙 李斌 李哲 田爱国 |
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| 作者单位： | 中国电子科技集团公司第五十四研究所,河北石家庄,050081 |
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| 摘 要： | 为了实现在室内和城市等低信噪比环境下的全球定位系统(GPS)导航,介绍了导航终端捕获卫星信号的基本原理。分析了相干积分算法、非相干积分算法、差分相关算法和圆周相关算法4种主要的卫星捕获算法,在此基础上提出了相干积分算法结合差分相关算法的高灵敏度GPS导航芯片设计方案。通过仿真分析,该芯片能够在15 dBHz的低载噪比环境下实现对卫星信号的正常捕获。
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| 关 键 词： | 高灵敏度 室内 导航 GPS |
Analysis on High Sensitivity GPS Navigation Methods |
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| XU Shi-long,LI Bin,LI Zhe,TIAN Ai-guo. Analysis on High Sensitivity GPS Navigation Methods[J]. Radio Engineering of China, 2011, 41(10): 37-39 |
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| Authors: | XU Shi-long LI Bin LI Zhe TIAN Ai-guo |
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| Affiliation: | XU Shi-long,LI Bin,LI Zhe,TIAN Ai-guo(The 54th Research Institute of CETC,Shijiazhuang Hebei 050081,China) |
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| Abstract: | In order to realize GPS navigation in low SNR environment,such as indoor and city environments,the basic principle of signal acquisition in navigation receiver is introduced.Several common acquisition methods of satellite signal such as coherent integration,non-coherent integration,differential correlation integration and circular correlation integration are analyzed.Coherent integration and differential correlation integration are chosen finally to design the high sensitivity GPS chip,and the results of simulation demonstrate that the normal acquisition for satellite signal can be successfully implemented by using this chip in such 15 dBHz CNR environment. |
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| Keywords: | high sensitivity indoor environment navigation GPS |
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