Correction to: Advances in BeiDou Navigation Satellite System (BDS) and satellite navigation augmentation technologies

Li, Rui; Zheng, Shuaiyong; Wang, Ershen; Chen, Jinping; Feng, Shaojun; Wang, Dun; Dai, Liwen

doi:10.1186/s43020-020-00015-x

Cited by 8 publications

(2 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…To verify the effectiveness of the proposed algorithm, a set of tests was conducted with the BeiDou Navigation Satellite System (BDS) B1I signal (Li et al, 2020;Zhao et al, 2022) (13)…”

Section: Methodsmentioning

confidence: 99%

A multipath mitigation algorithm for GNSS signals based on the steepest descent approach

Qiu

Zeng

et al. 2022

Satell Navig

View full text Add to dashboard Cite

Multipath interference seriously degrades the performance of Global Navigation Satellite System (GNSS) positioning in an urban canyon. Most current multipath mitigation algorithms suffer from heavy computational load or need external assistance. We propose a multipath mitigation algorithm based on the steepest descent approach, which has the merits of less computational load and no need for external aid. A new ranging code tracking loop is designed based on the steepest descent method, which can save an early branch or a late branch compared with the narrow-spacing correlation method. The power of the Non-Line-of-Sight (NLOS) signal is weaker than that of the Line-of-Sight (LOS) signal when the LOS signal is not obstructed and with a relatively high Carrier Noise Ratio (CNR). The peak position in the X-axis of the ranging code autocorrelation function does not move with the NLOS interference. Meanwhile, the cost function is designed according to this phenomenon. The results demonstrate that the proposed algorithm outperforms the narrow-spacing correlation and the Multipath Estimated Delay Locked Loop (MEDLL) in terms of the code multipath mitigation and computation time. The Standard Deviation (STD) of the tracking error with the proposed algorithm is less than 0.016 chips. Moreover, the computation time of the proposed algorithm in a software defined receiver is shortened by 24.21% compared with the narrow-spacing correlation.

show abstract

“…To verify the effectiveness of the proposed algorithm, a set of tests was conducted with the BeiDou Navigation Satellite System (BDS) B1I signal (Li et al, 2020;Zhao et al, 2022) (13)…”

Section: Methodsmentioning

confidence: 99%

A multipath mitigation algorithm for GNSS signals based on the steepest descent approach

Qiu

Zeng

et al. 2022

Satell Navig

View full text Add to dashboard Cite

show abstract

“…Satellite-based augmentation system (SBAS) is a well-known augmentation technique in aeronautical navigation in many parts of the world (European GNSS Agency 2018;Li et al 2020). It is particularly a vital part of enroute and possibly approach phases.…”

Section: Introductionmentioning

confidence: 99%

Local Mitigation of Higher-Order Ionospheric Effects in DFMC SBAS and System Performance Evaluation

Sophan

Supnithi

Myint

et al. 2023

Preprint

View full text Add to dashboard Cite

Dual-Frequency Muti-Constellation (DFMC) Satellite-Based Augmentation System (SBAS) is a new SBAS standard for aeronautical navigation systems. It supports aircraft navigation from the enroute to approach phases via the L1 and L5 frequencies (1575.42 and 1176.45 MHz). Although the ionosphere-free (IF) combination in the DFMC SBAS operation removes the first-order ionospheric delays in the pseudorange measurement, remaining terms including the satellite-clock offset errors and higher-order ionospheric (HOI) delays are still unaccounted for. The DFMC SBAS accuracy and integrity can be affected by the HOI effects, especially during severe ionospheric disturbances. In this work, we present the local DFMC SBAS corrections with and without the mitigation of HOI delays. We first estimate the HOI delay terms using the received pseudorange followed by separate satellite and receiver bias estimations based on the minimum sum-variance technique. The integrity terms can then be obtained. The performances of DFMC SBAS using GNSS data (GPS, Galileo, and QZSS) are evaluated using obtained GNSS data at stations in Thailand on the ionospheric quiet and disturbed days. The results show that with the HOI mitigation, the vertical positioning errors (VPE) on the quiet and disturbed days can be improved by 12% and 9%, whereas the vertical protection levels (VPL) are improved by 16% and 21%, respectively. In addition, we perform a preliminary assessment of DFMC SBAS based on the International Civil Aviation Organization (ICAO) requirements of two categories: LPV-200 and CAT-I showing promising results.

show abstract

An Ionospheric Disturbance Index for SBAS Based on Gradient Variation

Liu¹,

Wang²,

Xu³

et al. 2022

Lecture Notes in Electrical Engineering

View full text Add to dashboard Cite

Correction to: Advances in BeiDou Navigation Satellite System (BDS) and satellite navigation augmentation technologies

Cited by 8 publications

References 1 publication

A multipath mitigation algorithm for GNSS signals based on the steepest descent approach

A multipath mitigation algorithm for GNSS signals based on the steepest descent approach

Local Mitigation of Higher-Order Ionospheric Effects in DFMC SBAS and System Performance Evaluation

An Ionospheric Disturbance Index for SBAS Based on Gradient Variation

Contact Info

Product

Resources

About