| 基于DBZP方法的微弱GPS信号快速捕获 |
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| 引用本文： | 焦瑞祥,茅旭初. 基于DBZP方法的微弱GPS信号快速捕获[J]. 电子学报, 2008, 36(12): 2285-2289 |
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| 作者姓名： | 焦瑞祥 茅旭初 |
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| 作者单位： | 上海交通大学仪器科学与工程系,上海,200240;上海交通大学仪器科学与工程系,上海,200240 |
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| 基金项目： | 国家自然科学基金(No.40674002); 2005年度教育部回国留学人员启动基金 |
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| 摘 要： | 卫星信号的捕获是GPS(Global Positioning System)接收机信号处理的首要任务.在微弱信号环境下,传统的方法难以实现信号捕获的准确性和快速性.本文的新方法将P(Y)码捕获技术应用于微弱GPS信号的C/A码捕获,并针对连续积分数据跨越多个导航电文数据位的情况给出解决方案.仿真结果表明,此方法能够较好地捕获到信噪比低至15dB-Hz的信号,同时确保较少的运算量和较高的灵敏度.
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| 关 键 词： | 全球定佗系统 双块零拓展 微弱信号处理 快速捕获 |
| 收稿时间： | 2007-08-25 |
Double Block Zero Padding-Based Fast-Acquisition of Weak GPS Signal |
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| JIAO Rui-xiang,MAO Xu-chu. Double Block Zero Padding-Based Fast-Acquisition of Weak GPS Signal[J]. Acta Electronica Sinica, 2008, 36(12): 2285-2289 |
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| Authors: | JIAO Rui-xiang MAO Xu-chu |
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| Affiliation: | Department of Instrument Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China |
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| Abstract: | Signal acquisition is the first work of signal processing in Global Positioning System receiver.However,it is difficult to get the accuracy and fast acquisition of the GPS signal by traditional methods when the signal is very weak.The paper presented a new method which applies the technology of acquisition of P(Y) code in the acquisition of C/A code,and gives resolutions account for the problems brought from the data spanning multiple data bits.The simulation results show that,signal which carrier noise rat... |
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| Keywords: | global positioning system(GPS) double block zero padding(DBZP) weak signal processing fast acquisition |
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