| 伪卫星多路径效应分形特征及其削弱方法研究 |
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| 引用本文： | 桑文刚,黄黎明,赵培华,刘迎春,卢凯.伪卫星多路径效应分形特征及其削弱方法研究[J].测绘通报,2020,0(10):58-62. |
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| 作者姓名： | 桑文刚 黄黎明 赵培华 刘迎春 卢凯 |
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| 作者单位： | 山东建筑大学测绘地理信息学院, 山东 济南 250101 |
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| 基金项目： | 山东省重点研发计划项目（2019GSF111052）；山东省高等学校科技计划项目（J17KA071）；住房和城乡建设部科技计划项目（2017-K7-001） |
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| 摘 要： | 多路径效应是伪卫星应用在精密定位领域的一项主要误差源，本文从验证多路径效应分形特征入手，利用小波分析在研究分形及信号去噪方面的优势，研究了分形信号与高斯白噪声的模极大值在小波变换下表征的不同特点，针对静态环境下伪卫星的应用，提出一种基于分形理论的多路径误差的消除方法。通过设计试验进行精度分析，验证了本文方法的有效性，且该算法从信号自身的分形特征入手，不需要额外的先验信息，对环境等条件要求较低，比较适合在形变监测等静态环境下应用。
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| 关 键 词： | 伪卫星 变形监测 多路径 分形 小波变换 |
| 收稿时间： | 2019-12-22 |
| 修稿时间： | 2020-02-01 |
Research on fractal features of multipath effect for pseudolite and its elimination strategy |
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| SANG Wengang,HUANG Liming,ZHAO Peihua,LIU Yingchun,LU Kai.Research on fractal features of multipath effect for pseudolite and its elimination strategy[J].Bulletin of Surveying and Mapping,2020,0(10):58-62. |
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| Authors: | SANG Wengang HUANG Liming ZHAO Peihua LIU Yingchun LU Kai |
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| Institution: | School of Surveying&Geo-informatics, Shandong Jianzhu University, Jinan 250101, China |
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| Abstract: | The multipath effect is of major concern in pseudolite precise applications. This paper first validate the multipath has the features of fractal and then study the difference on the modulus maximum between fractal and Gauss noise by wavelet transform. A new method is proposed to separate multipath and noise base on fractal theory and wavelet transform for stationary applications. The filed tests show this method can effectively reduce the multipath effect of pseudolite and improve the accuracy and reliability of pseudolite augmented GPS positioning system. This method is just based on the fractal of the signal without introducing extra priori information and more suitable for some harsh observation conditions, especially for deformation monitoring applications. |
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| Keywords: | pseudolite deformation monitoring multipath fractal wavelet transform |
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