A weighted GPS positioning algorithm for urban canyons using dual-polarised antennae

IF 1.2 Q4 TELECOMMUNICATIONS

Journal of Location Based Services Pub Date : 2022-09-19 DOI:10.1080/17489725.2022.2122612

Xueru Ge, Xin Liu, Rui Sun, Linxia Fu, Ming Qiu, Zixuan Zhang

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引用次数: 0

Abstract

ABSTRACT The positioning performance of the Global Positioning System (GPS) is severely degraded in urban canyons due to buildings blocking or attenuating signals. This paper proposes a weighted GPS positioning method using a dual-polarisation antenna in order to deal with this issue. The GPS signals are first classified and labelled into NLOS signals and LOS/MP signals by considering the right-hand circular polarised (RHCP) and the left-hand circular polarised (LHCP) signal strengths. Then, a Bayesian optimisation-based Gaussian process is used to fit the pseudorange error related to the input of the carrier-to-noise ratio of the RHCP QUOTE ( ) and the elevation angle of the LOS/MP signals. The pseudorange errors of the LOS/MP signals are therefore predicted based on the rules extracted from the fitting results. The positioning solutions are then obtained from the weighted least-squares algorithm, with the weighting strategies being based on the predicted pseudorange errors. Static positioning results in deep urban areas showed that the horizontal root-mean-square error (RMSE) positioning has been improved by 64.6% and 57.3%, respectively, while 3D RMSEwas improved by 74.3% and 48.1%, respectively, compared with traditional single-point positioning results.

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基于双极化天线的城市峡谷加权GPS定位算法

全球定位系统(GPS)的定位性能在城市峡谷中由于建筑物的阻挡或信号衰减而严重下降。为了解决这一问题，本文提出了一种双极化天线加权GPS定位方法。首先考虑了GPS信号的右圆极化(RHCP)和左圆极化(LHCP)信号强度，将GPS信号分为NLOS信号和LOS/MP信号。然后，利用基于贝叶斯优化的高斯过程拟合与RHCP载波噪声比QUOTE()输入和LOS/MP信号仰角相关的伪距误差。因此，基于从拟合结果中提取的规则来预测LOS/MP信号的伪距误差。然后利用加权最小二乘算法得到定位解，加权策略基于预测的伪距误差。静态定位结果显示，与传统的单点定位结果相比，水平均方根误差(RMSE)分别提高了64.6%和57.3%，三维均方根误差(RMSE)分别提高了74.3%和48.1%。

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来源期刊

Journal of Location Based Services TELECOMMUNICATIONS-

CiteScore

3.70

自引率

8.70%

发文量

期刊介绍： The aim of this interdisciplinary and international journal is to provide a forum for the exchange of original ideas, techniques, designs and experiences in the rapidly growing field of location based services on networked mobile devices. It is intended to interest those who design, implement and deliver location based services in a wide range of contexts. Published research will span the field from location based computing and next-generation interfaces through telecom location architectures to business models and the social implications of this technology. The diversity of content echoes the extended nature of the chain of players required to make location based services a reality.