According to foreign media reports, the BeiDou satellite navigation system (BDS) is undergoing a major upgrade to meet the growing demand for high-precision positioning in various fields. The new service aims to provide decimeter-level accuracy within minutes, a significant improvement over existing capabilities.
This advancement is critical for emerging technologies such as autonomous driving, robotic navigation and smart city infrastructure, which rely on reliable and accurate location data for their effective operation.
With the rapid development of technologies such as autonomous driving and robotic navigation, the market has witnessed a surge in demand for highly accurate and reliable positioning systems. While legacy systems such as the Global Positioning System (GPS), the Global Navigation Satellite System (GLONASS) and the Galileo satellite navigation system (Galileo) have set high standards, challenges such as limited regional coverage and long convergence times remain.
Those problems highlighted the need to strengthen navigation satellite systems. The BeiDou satellite navigation system aims to address these challenges by improving its high-precision services, making it a key player in global positioning.
The upgrade was made by researchers at the Beijing Institute of Tracking and Telecommunication Technology in collaboration with the Shanghai Astronomical Observatory and Wuhan University, and was completed by the Beijing Institute of Tracking and Telecommunication Technology in collaboration with the Shanghai Astronomical Observatory and Wuhan University. Researchers at the Beijing Institute of Tracking and Telecommunication Technology, in collaboration with the Shanghai Astronomical Observatory and Wuhan University, have published their findings in the journal Satellite Navigation. The study, released on June 24, 2024, details the high-precision services of the BeiDou system and outlines its current status, achievements and future trajectory.
The study examines BeiDou’s high-precision services, focusing on BDS-3’s PPP-B2b, which can achieve decimeter-level accuracy in 14 minutes. Despite the progress, BDS-3 still lags behind Galileo’s High Accuracy Service (HAS) and Quasi-Zenith Satellite System’s (QZSS) Centimeter-Level Augmentation Service (CLAS) in terms of area coverage and convergence time.
In response to these limitations, this study proposes a multi-layer development framework that emphasizes the integration of Low Earth Orbit (LEO) satellites. Integration of a LEO constellation of 288 satellites can improve positioning accuracy to more than 5 cm in about 1 minute, resulting in enhanced global coverage and significantly reduced convergence time.
Simulation results show that the LEO-enhanced PPP service can achieve fast and accurate positioning, overcoming current limitations and making BeiDou Positioning a leader in high-precision satellite navigation.
Dr. Xingxing Li of Wuhan University said, “Advances in BeiDou high-precision services are critical to meet the escalating demands of modern navigation applications. The integration of low-orbit satellites is particularly promising for research, as it can significantly improve coverage and shorten convergence time, bringing us closer to achieving centimeter-level real-time positioning accuracy on a global scale.”
The enhanced Beidou high-precision service has far-reaching implications for a variety of applications including autonomous driving, drones and smart device navigation. The proposed improvements in global coverage and convergence time will enable more accurate and reliable positioning solutions and promote innovation and efficiency in these areas. This development marks an important step forward in the development of GNSS, making BeiDou positioning a leader in high-precision services.