How NLOS Signals affect GNSS relative positioning

Author:

Ye Xiaozhou,Ma Pengcheng,Liu Wenxiang,Wang Feixue

Abstract

Abstract Owing to the existence of non-line-of-sight (NLOS) signals in global navigation satellite system (GNSS) challenged environment, the accuracy of GNSS relative positioning is seriously damaged. This paper demonstrates the effects of NLOS measurement error on GNSS relative positioning for short-baseline in both theory and field test. The results show that the effects of NLOS signal in both pseudorange and carrier phase make the ambiguity unable to be successfully fixed. In addition, we have found that after removing the labelled NLOS observations, the positioning accuracy can be significantly improved. The more the available LOS satellites, the more the robustness against NLOS satellites of the ambiguity resolution. This implies that GNSS Multi-Frequency Multi-System technology might improve the performance of GNSS relative positioning because there would be sufficient LOS signals after the NLOS signals are removed.

Publisher

IOP Publishing

Subject

General Physics and Astronomy

Reference22 articles.

1. Performances Analysis of GNSS NLOS Bias Correction in Urban Environment Using a Three-Dimensional City Model and GNSS Simulator;Kbayer;IEEE Transactions on Aerospace and Electronic Systems

2. Multi-Frequency GNSS Signal Fusion for Minimization of Multipath and Non-Line-of-Sight Errors: A Survey, 2018;Ollander,2018

3. Multipath vs. NLOS signals. How does non-line-of-sight reception differ from multipath interference;Groves;Inside GNSS Mag.,2013

4. NLOS Identification in Range-Based Source Localization: Statistical Approach;Abolfathi Momtaz;IEEE Sensors Journal,2018

5. Analysis and modeling GPS NLOS effect in highly urbanized area;Hsu;GPS Solut,2018

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