| 低信噪比条件下GPS信号捕获方法研究 |
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| 引用本文： | 危风江,杨小亮,徐双成.低信噪比条件下GPS信号捕获方法研究[J].湖北汽车工业学院学报,2008,22(2):40-43. |
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| 作者姓名： | 危风江 杨小亮 徐双成 |
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| 作者单位： | 北京军区军械汽车技工训练大队,河北石家庄,050081 |
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| 摘 要： | 为了有效地对低信噪比GPS C／A信号进行捕获，必须在捕获阶段克服比特跳变的影响，以充分利用上GPS信号的扩频增益。针对以上问题，对已有的PMF—FFT捕获算法进行了改进，并提出对低信噪比GPS C／A码信号进行捕获的方案。仿真分析证明，这种改进方案可以明显提高低信噪比C／A码GPS信号捕获概率，并在一定条件下可以提供比特跳变信息。
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| 关 键 词： | GPS信号捕获 C/A码 PMF—FFT算法 比特跳变 |
Study on Acquisition Method of GPS Signal in Low SNR |
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| Wei Fengjiang,Yang Xiaoliang,Xu Shuangcheng.Study on Acquisition Method of GPS Signal in Low SNR[J].Journal of Hubei Automotive Industries Institute,2008,22(2):40-43. |
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| Authors: | Wei Fengjiang Yang Xiaoliang Xu Shuangcheng |
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| Institution: | (Ordnance and Automobile Artificers Training Regiment, Beijing Garrison, Shijiazhuang 050081,China) |
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| Abstract: | The PMF-FFT arithmetic was improved and a new acquisition method of C/A code GPS signal in low SNR was proposed to detect the low SNR GPS signal,make full use of the spreading gain of GPS signal and overcome the effect of the navigation date transition.The experimental results show this new method can improve the probability of C/A code GPS signal acquisition in low SNR and provide the information of navigation date transition under some conditions. |
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| Keywords: | GPS signal acquisition C/A code PMF-FFT arithmetic navigation data transition |
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