| GNSS多路径和信噪比相关性分析 |
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| 引用本文： | 尹子明,陈明剑,闫建巧,汪威,周润杨.GNSS多路径和信噪比相关性分析[J].测绘与空间地理信息,2017(2):109-112. |
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| 作者姓名： | 尹子明 陈明剑 闫建巧 汪威 周润杨 |
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| 作者单位： | 1. 91431部队,海南海口,570311;2. 信息工程大学导航与空天目标工程学院,河南郑州,450001 |
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| 摘 要： | 在全球导航卫星系统(Global Navigation Satellite System,GNSS)接收机附近的反射、衍射、干扰信号等所造成的多路径效应是影响定位的主要误差来源。信噪比(Signal-Noise Ratio,SNR)的振荡是由多路径信号叠加在直接信号上引起的,基于此原理学者们提出了很多检测和缓解多路径误差的方法。本文通过谱分析的方法对多路径时间序列进行了分析,并研究多路径与信噪比之间的相关性,对基于信噪比检测和缓解多路径误差的方法的适用性进行了说明。实验表明:多路径和信噪比振荡值的时间序列具有显著的相关性,能够利用信噪比观测值削弱多路径影响。
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| 关 键 词： | GNSS 多路径 功率谱密度 信噪比 |
Correlation Analysis for GNSS Multipath and SNR |
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| YIN Zi-ming,CHEN Ming-jian,YAN Jian-qiao,WANG Wei,ZHOU Run-yang.Correlation Analysis for GNSS Multipath and SNR[J].Geomatics & Spatial Information Technology,2017(2):109-112. |
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| Authors: | YIN Zi-ming CHEN Ming-jian YAN Jian-qiao WANG Wei ZHOU Run-yang |
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| Abstract: | The muhipath effect caused by the reflection,diffraction and interference signal in the vicinity of the GNSS receiver is the main error source of the single point positioning and differential positioning.The oscillation of SNR is caused by the multipath signal superimposed on the direct signal;scholars have proposed a lot of methods to detect and mitigate multipath error based on this principle.The multipath time series is analyzed by means of spectral analysis,correlation between multipath and SNR is researched,and the applicability of the method based on signal to noise ratio detecting and mitigating of multipath is studied.It's proved that the time series of SNR oscillation and multipath time series are significantly related.SNR observations can be used to weaken the impact of mul tipath. |
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| Keywords: | GNSS Multipath power spectral density SNR |
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