Conventional car navigation systems use satellite receivers and commercial satellite services to help drivers reach their destinations with positioning accuracy within a few meters.With the increased use of autonomous driving systems such as lane departure warning (LDW), adaptive cruise control (ACC ), Automatic parking, autopilot, safety and reliability require higher positioning accuracy to meet the distance detection sensors, such as cameras, radar, laser radar, etc. to automatically monitor the driving environment, the future of fully automated vehicles also require high precision Positioning.
Receives at least two frequencies from each satellite system (other products receive only one frequency) by tracking all Global Navigation Satellite Systems (GNSS) simultaneously, provided by ST's automotive-grade Teseo APP (automotive-grade positioning accuracy) receiver The high-quality raw GNSS data required for PPP (precise point location) and RTK (real-time dynamic) algorithms can achieve accurate positioning and fast convergence times around the world.
Traditional GNSS-based vehicle positioning and navigation systems use only single-frequency GNSS receivers and use L1 frequency band communication for consumption, which is susceptible to environmental-related errors such as multipath and ionospheric delay, resulting in lower positioning accuracy. By tracking multiple frequency bands All available GNSS signals, such as GPS and GLONASS, Galielo, BeiDou, QZSS and IRNSS L1, L2 and L5 frequency bands, and Galileo E6 signals with accurate single point positioning (PPP) correction data to achieve global decimeter-level positioning accuracy, Teseo APP eliminates these errors.
In addition to high precision, this industry-unique receiver can also monitor the integrity of satellite data. If the accuracy is reduced for any reason, the receiver will immediately notify the system. This early warning function enables the safety-critical system of Tier 1 suppliers to comply with the automotive industry. Functional Safety Standard ISO 26262 and the highest Automotive Safety Integrity Level (ASIL) standard. The Teseo APP also integrates a safety microcontroller for system safety startup and data output verification to prevent sensitive data from being attacked.
Also released with the Teseo APP is a Teseo V chip that also features multi-frequency precision positioning, a simplified product developed for non-security-critical applications that do not require integrity protection.
Antonio Radaelli, Director of ST’s Infotainment Division, said: “High-precision satellite positioning systems make autonomous driving safer, smoother and more reliable. Our newest Teseo APP GNSS chip combines extreme accuracy and unique integrity assurance in the industry. For safety-critical applications. '
STMicroelectronics currently provides samples for large customers that are developing autopilot systems, and is expected to install it first on high-end models introduced in 2020/2021.