| 高灵敏度GPS信号捕获技术研究 |
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| 引用本文： | 李怀建,刘莉,杜小菁.高灵敏度GPS信号捕获技术研究[J].弹箭与制导学报,2009,29(4). |
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| 作者姓名： | 李怀建 刘莉 杜小菁 |
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| 作者单位： | 北京理工大学宇航科学技术学院,北京,100081 |
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| 摘 要： | 分析了影响GPS信号捕获灵敏度的因素,提出了减小相干损耗、降低噪声功率等实现高灵敏度信号捕获的技术途径;研究了相干损耗对灵敏度的影响,提出了高灵敏度捕获的搜索步长选择方案;研究了相干积分和非相干积分的信噪比增益,提出了相干积分+非相干积分的信噪比增加方案;进行了信号捕获仿真,仿真结果表明,所提出的技术途径可行,能够实现对30dB-Hz的低信噪比信号的捕获.
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| 关 键 词： | 高灵敏度 信号捕获 |
Study on High-sensitivity GPS Signal Acquisition Techniques |
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| LI Huaijian,LIU Li,DU Xiaojing.Study on High-sensitivity GPS Signal Acquisition Techniques[J].Journal of Projectiles Rockets Missiles and Guidance,2009,29(4). |
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| Authors: | LI Huaijian LIU Li DU Xiaojing |
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| Affiliation: | LI Huaijian,LIU Li,DU Xiaojing(School of Aerospace Science , Engineering,Beijing Institute of Technology,Beijing 100081,China) |
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| Abstract: | The factors which affect GPS signal acquisition sensitivity were analyzed.Some signal acquisition techniques with high sensitivity such as reducing wastage and noise power were proposed.In addition,the influence of wastage on sensitivity was studied;The selection scheme of search step in high sensitivity signal acquisition was also presented.Furthermore,the SNR gain of correlative and non-correlative integral was studied.An approach which combines correlative and non-correlative integral was provided to inc... |
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| Keywords: | GPS |
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