Feature Extraction of GNSS Signals Based on Signal Processing Techniques for Land Deformation Detection

N. Khamisan, Kamarul Hawari bin Ghazali, Xu Jiang
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Abstract

The Global Navigation Satellite System (GNSS) refers to a constellation of satellites that provide position and time signals from space that allow a receiver to determine location. These GNSS signals can be used to determine the position and time of an object such as a human, a vehicle, and many other objects. Moreover, in this study, GNSS signals were used to determine the soil geophysical movement based on the signal positioning of the receiver station. A signal processing method has been applied to find the best feature extraction method for normal and abnormal signal classification. A set of GNSS signals has been acquired from a land deformation monitoring station in China that contains 3 months of the continuous GNSS signal. The signal is then processed and extracted using time series analysis and statistical approach to determine the normal and abnormality of the soil movement. There were three (3) periodic terms involved in the GNSS signal processing which velocity, distance, and acceleration. These 3 properties were used to analyze the normal and abnormality of soil movement that will be contributed to a landslide. Finally, the experimental results have proved that the feature extraction method on GNSS signal was found to be able to produce significant features to detect normal and abnormal land deformation.
基于信号处理技术的GNSS信号特征提取
全球导航卫星系统(GNSS)指的是一个卫星星座,它提供来自太空的位置和时间信号,使接收器能够确定位置。这些GNSS信号可用于确定物体(如人、车辆和许多其他物体)的位置和时间。此外,本研究基于接收站的信号定位,利用GNSS信号确定土壤地球物理运动。应用一种信号处理方法,寻找正常和异常信号分类的最佳特征提取方法。从中国某陆地变形监测站获取了一组包含3个月连续GNSS信号的GNSS信号。然后利用时间序列分析和统计方法对信号进行处理和提取,以确定土壤运动的正常和异常。在GNSS信号处理过程中,有三个周期项:速度、距离和加速度。利用这三个性质分析了导致滑坡的土壤运动的正常和异常。最后,实验结果证明,GNSS信号的特征提取方法能够产生显著的特征来检测正常和异常的陆地变形。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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