| 多普勒频率补偿算法在GPS信号捕获中的应用 |
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| 引用本文： | 张明林,李国通,朱秋芳.多普勒频率补偿算法在GPS信号捕获中的应用[J].计算机仿真,2009,26(10):69-72. |
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| 作者姓名： | 张明林 李国通 朱秋芳 |
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| 作者单位： | 中国科学院上海微系统与信息技术研究所;上海伽利略导航有限公司; |
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| 基金项目： | 国家863项目(2006AA12Z301) |
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| 摘 要： | 在GPS卫星高速运动和地面GPS接收机的移动中,由于卫星和接收机之间的径向速度引起了载波多普勒频移、C/A码的多普勒频移和数据码的多普勒频移,多普勒频移会对GPS接收机的信号捕获产生影响,使其准确度下降。针对上述情况,在常用的相干积分结合非相干积分的GPS信号捕获方案中引入一种多普勒频率补偿算法,并对此算法进行相应的仿真。结果表明该设计方案是可行的,引入的补偿算法能够有效消除多普勒频移对GPS信号捕获的影响,能够实现对GPS卫星信号的多普勒和码相的准确捕获。
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| 关 键 词： | 多普勒频移 信号捕获 相干 非相干 频率补偿 |
Application of Doppler Frequency Compensation Algorithm in Acquisition of GPS Signals |
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| ZHANG Ming-lin,LI Guo-tong,ZHU Qiu-fang.Application of Doppler Frequency Compensation Algorithm in Acquisition of GPS Signals[J].Computer Simulation,2009,26(10):69-72. |
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| Authors: | ZHANG Ming-lin LI Guo-tong ZHU Qiu-fang |
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| Affiliation: | 1.Shanghai Institute of Microsystem and Information Technology;Chinese Academy of Sciences;Shanghai 200050;China;2.Shanghai GALILEO Industries Ltd.;Shanghai 200233;China |
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| Abstract: | The Doppler frequency shift on the carrier,on the C/A code and on the data code caused by the radial velocity between high speed GPS satellite and moving receiver has a great influence on the acquisition of GPS signals.The presence of the Doppler frequency shift degrades the acquisition accuracy.Thus,a Doppler frequency compensation algorithm is introduced to the traditional acquisition scheme which combines coherent integral with incoherent integral and is simulated.Final simulation results show that the d... |
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| Keywords: | Doppler frequency shift Acquisition of signal Correlation Non-correlation Frequency compensation |
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