| BroadGNSS Technology Co., Ltd. is a national high-tech enterprise focused on satellite navigation and positioning solutions and product development. The company has introduced a new type of RAC (Realtime Array Calibration) high-precision satellite positioning receiver to the market. This receiver features the use of standard civilian single-frequency signals (GPS L1 or BDS B1) without relying on any differential technology (or auxiliary technologies like inertial navigation), achieving positioning accuracy better than sub-meter and decimeter levels. The application of this technology eliminates the dependence on ground-based augmentation networks while significantly reducing costs, accelerating the widespread adoption of high-precision satellite positioning.   BroadGNSS provides targeted solutions in the field of L4-level low-speed autonomous vehicles. Currently, most L4-level autonomous vehicles operating on public roads are equipped with BroadGNSS’s RAC high-precision satellite positioning system. This product offers efficient and precise intelligent services in application scenarios such as urban logistics distribution and park cleaning. The solution integrates lidar, cameras, IMU, and high-precision map SLAM technology to achieve autonomous driving in complex road environments.
The RAC positioning product provides sub-meter level initial absolute positioning information. Combined with stereo cameras and lidar, it achieves centimeter-level relative positioning, ensuring the vehicle’s precise operation in complex roads and repetitive paths. By integrating high-precision maps with SLAM technology, the vehicle can update the environmental map in real time and optimize its driving path. Compared to traditional RTK solutions, the RAC-based positioning solution significantly reduces hardware costs and is suitable for large-scale applications.
BroadGNSS’s L4-level low-speed autonomous vehicle solution is widely applied in logistics distribution, security reconnaissance, sanitation cleaning, and park commuting scenarios. Especially in complex environments such as open roads and parks, BroadGNSS’s high-precision RAC positioning system ensures safe and efficient operation of autonomous vehicles, providing strong technical support for the low-speed autonomous driving industry.
     The Eight Major Pain Points of RTK Ground-Based Augmentation Mode in the Automotive Field
1. Terminal hardware, differential technology, and components were originally used in the surveying industry, resulting in high hardware costs.
2. Service fees must be paid to obtain differential correction data. 3. Communication data fees are required for transmission between the user terminal and the augmentation system, and these fees are paid to the 4G telecom operator. 4. Data confidentiality issues: the ground-based augmentation network involves bidirectional data, and the user's location data is automatically collected by the operator without compensation. 5. Limited usage range: it only works within the coverage area of differential stations. In reality, the range with guaranteed usable signals is still very limited. 6. Due to the complexity of the technology, it is difficult to collect evidence for legal protection. After an accident, it is hard to determine responsibility among the satellite network, ground-based augmentation network, 5G/4G operators, and terminal equipment suppliers. 7. Low availability, with poor data integrity. 8. High-precision RTK antennas are too large and thick to be installed on mass-produced vehicles. RAC satellite positioning technology can address the following eight major pain points
1. The user purchases terminal hardware at a low price, with low BOM hardware costs.
2. No differential correction data support is required. 3. Users do not need to pay communication data fees for transmission between the user terminal and the augmentation system. 4. Data privacy issue: the data is only owned by the user (the car manufacturer). 5. Global availability. 6. Product quality responsibility is clear and borne by us. 7. High availability, good data integrity. 8. RAC is easy to install on mass-produced vehicles! |
