Performance Analysis of Positioning Solution Using Low-Cost Single-Frequency U-Blox Receiver Based on Baseline Length...

Area of Science:

• Satellite Navigation
• Geomatics Engineering
• Geodesy

Background:

• The satellite navigation industry is rapidly advancing, driving demand for low-cost, high-precision Global Navigation Satellite System (GNSS) positioning.
• Low-cost measuring instruments offer potential for broader GNSS applications, but data quality limitations necessitate advanced processing methods.

Purpose of the Study:

• To analyze and evaluate the ambiguity fixed-rate and positioning accuracy of single-frequency Global Positioning System (GPS) and BeiDou Navigation Satellite System (BDS) data.
• To compare the performance of the Constrained LAMBDA (CLAMBDA) method against the classical LAMBDA method using low-cost receiver data.

Main Methods:

• Utilized data from a low-cost u-blox receiver for single-frequency GPS and BDS.
• Applied the Constrained LAMBDA (CLAMBDA) method incorporating a baseline length constraint.
• Conducted experiments in static short-baseline and dynamic vehicle environments.

Main Results:

• The CLAMBDA method demonstrated a significant improvement in the success rate of GNSS ambiguity resolution compared to the classical LAMBDA method.
• Achieved baseline solution accuracy of 0.5–1 cm in static scenarios and 1–2 cm on a dynamic platform when ambiguity was correctly fixed.

Conclusions:

• The CLAMBDA method is effective in enhancing the reliability and accuracy of GNSS positioning with low-cost receivers.
• This approach offers a viable solution for improving the performance of single-frequency GPS and BDS in various application environments.