| 北斗无源定位的虚拟卫星算法 |
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| 引用本文： | 刘家兴,陆明泉,崔晓伟,冯振明.北斗无源定位的虚拟卫星算法[J].清华大学学报(自然科学版),2009(1). |
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| 作者姓名： | 刘家兴 陆明泉 崔晓伟 冯振明 |
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| 作者单位： | 清华大学电子工程系; |
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| 摘 要： | 为了解决现有的气压高度计辅助卫星定位算法计算繁琐或者难于分析定位精度的问题,该文提出虚拟卫星定位算法。该算法根据用户的位置估计值生成一颗"虚拟"卫星,对应的"虚拟"伪距由气压高度计提供,结合用户的可见卫星和测得的伪距来更新用户的位置估计值,反复执行上述过程直至收敛。该算法计算步骤简单,可直接进行定位精度分析。将该算法应用于北斗三星无源定位当中,仿真结果表明:设定气压测高误差标准差为8m,则中国及邻近地区的位置精度因子为8.8至22.4;在清华大学校园进行的静态测试显示,在各个历元上迭代过程只有4～9次,定位均方根误差为42.7m。
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| 关 键 词： | 虚拟卫星定位 北斗无源定位 气压高度计 定位精度 |
Virtual satellite algorithm for Beidou passive positioning |
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| LIU Jiaxing,LU Mingquan,CUI Xiaowei,FENG Zhenming.Virtual satellite algorithm for Beidou passive positioning[J].Journal of Tsinghua University(Science and Technology),2009(1). |
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| Authors: | LIU Jiaxing LU Mingquan CUI Xiaowei FENG Zhenming |
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| Institution: | Department of Electronic Engineering;Tsinghua University;Beijing 100084;China |
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| Abstract: | Current satellite positioning algorithms that rely on barometric altimeters are either complex or have difficulty to analyze positioning accuracies.This paper presents a virtual satellite positioning algorithm that generates a "virtual" satellite based on the user's estimated position using the "virtual" pseudorange provided by the barometer.The user's estimated position is iteratively renewed based on the real and virtual satellite pseudoranges until convergence.The algorithm simplifies the computations an... |
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| Keywords: | virtual satellite positioning Beidou passive positioning barometric altimeter positioning accuracy |
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