| 低信噪比下GPS信号P码直接捕获技术 |
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| 引用本文： | 李健,刘峰,龙腾. 低信噪比下GPS信号P码直接捕获技术[J]. 北京理工大学学报, 2009, 29(1): 68-72 |
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| 作者姓名： | 李健 刘峰 龙腾 |
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| 作者单位： | 北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081;北京理工大学,信息科学技术学院电子工程系,北京,100081 |
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| 摘 要： | 对扩展复制重叠捕获技术和均值法,两种当前P码捕获频域处理的典型方法进行了性能分析和比较. 基于均值法提出一种最小资源P码直接捕获硬件实现方法,进行硬件系统设计和实现,对P码捕获的性能进行实际测试. 结果表明,在满足低信噪比捕获概率情况下,相对扩展复制重叠捕获技术和直接FFT法,均值法降低资源消耗,缩短捕获时间,达到设计指标要求.
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| 关 键 词： | P码直接捕获 扩展复制重叠捕获技术 均值法 低信噪比 |
| 收稿时间： | 2008-04-10 |
Direct Acquisition of GPS P-Code Under Low-SNR |
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| LI Jian,LIU Feng and LONG Teng. Direct Acquisition of GPS P-Code Under Low-SNR[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 2009, 29(1): 68-72 |
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| Authors: | LI Jian LIU Feng LONG Teng |
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| Affiliation: | Department of Electronic Engineering;School of Information Science and Technology;Beijing Institute of Technology;Beijing 100081;China |
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| Abstract: | Extended Replica Folding Acquisition Search Technology(XFAST)and the Average Method are two typical methods for GPS P-code acquisition in the frequency domain.Performance of P-code direct acquisition using the two methods was analyzed and compared.The study brings up a hardware realization method of direct P-code acquisition with least hardware resources based on the average method,and designs a hardware system for verification.It provides a P-code acquisition performance test in real system.The system can ... |
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| Keywords: | direct acquisition of P-code extended replica average method low-SNR |
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