Multi-Frequency GNSS Signal Fusion for Minimization of Multipath and Non-Line-of-Sight Errors: A Survey

Ollander, Simon; Bode, Friedrich-Wilhelm; Baum, Marcus

doi:10.1109/wpnc.2018.8555856

Cited by 13 publications

(2 citation statements)

References 17 publications

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“…only reflected signals), and multipath (MP) signals (i.e. both direct and alternative path signals) [2 ]. Although both the NLOS signals and MP signals often arise together and are usually grouped together as MP effects, they are actually separate phenomena which may cause very different ranging errors [3 ].…”

Section: Introductionmentioning

confidence: 99%

Robust real‐time kinematic positioning method based on NLOS detection and multipath elimination in GNSS challenged environments

Liu

et al. 2020

Electron. lett.

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Owing to the existence of non‐line‐of‐sight (NLOS) signals in global navigation satellite system (GNSS) challenged environment, the real‐time kinematic (RTK) position precision is seriously damaged. In order to improve the position accuracy, the authors propose a robust positioning method which tackles this problem by detecting the NLOS through a decision tree and estimating the double‐differenced multipath errors in real time. The NLOS detection performance of the proposed method is 95.64%. The field experiment shows that the ambiguity fixing rate has improved by 43% in the instantaneous mode, and the 3D position accuracy is about 81.77% higher better than that of normal RTK method which is implemented by using RTKLIB software.

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Section: Introductionmentioning

confidence: 99%

Robust real‐time kinematic positioning method based on NLOS detection and multipath elimination in GNSS challenged environments

Liu

et al. 2020

Electron. lett.

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“…), it has become increasingly attractive to reduce multipath and non-line-of-sight (NLOS) errors by using multi-frequency measurements [9][10][11][12]. Among them, multi-frequency carrier power-to-noise density ratio (C/N 0 )-based multipath detection shows great potential in real-time applications because it does not require additional hardware and the computational load is low [13,14].…”

Section: Introductionmentioning

confidence: 99%

Robust Statistical Detection of GNSS Multipath Using Inter-Frequency C/N0 Differences

et al. 2020

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Multipath detection and mitigation are crucial issues for global navigation satellite system (GNSS) high-precision positioning. The multi-frequency carrier power-to-noise density ratio (C/N0)-based multipath detection technique has achieved good results in real-time static and low-dynamic applications, and shown better practicability because of the low computational load and the requirement for little additional hardware. However, the classic multipath detection method based on inter-frequency C/N0 differences directly employs the 3σ rule to determine the threshold without considering the distribution of detection statistics and their variation characteristics with elevation angle, and ignores the interference of outliers to the reference functions. A robust multipath detection method is proposed in this paper. The reference functions of C/N0 differences are fitted using least absolute deviation (LAD) to obtain more accurate nominal values. According to the skew characteristics of the detection statistics, a medcouple (MC)-based adjusted boxplot is employed to determine the threshold. The performance of the new detection method is verified in the multipath environments. The experimental results show that compared with the classic method, the new multipath detector has strong robustness and can respond more accurately to large changes in multipath (MP) combination values at most elevation angles. It is sensitive to short-delay multipath and diffraction, and is an important supplement to multipath detection techniques.

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Characterization of multi-band GNSS multipath in urban canyons using the 3D ray-tracing method

Li,

Yang,

Zhan

2023

GPS Solut

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Multi-Frequency GNSS Signal Fusion for Minimization of Multipath and Non-Line-of-Sight Errors: A Survey

Cited by 13 publications

References 17 publications

Robust real‐time kinematic positioning method based on NLOS detection and multipath elimination in GNSS challenged environments

Robust real‐time kinematic positioning method based on NLOS detection and multipath elimination in GNSS challenged environments

Robust Statistical Detection of GNSS Multipath Using Inter-Frequency C/N0 Differences

Characterization of multi-band GNSS multipath in urban canyons using the 3D ray-tracing method

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