STMicroelectronics, a global leader in semiconductor technology, has introduced the world's first multi-frequency satellite navigation receiver chip designed for safety-critical automotive applications and high-precision positioning systems like PPP and RTK. This breakthrough aims to enhance driving safety by delivering centimeter-level accuracy, essential for advanced driver assistance systems (ADAS) and fully autonomous vehicles.
Traditional car navigation systems typically rely on single-frequency GNSS signals, such as L1, which are prone to errors from environmental factors like ionospheric delay and multipath interference. These inaccuracies limit their effectiveness in critical applications where precision is vital. As autonomous driving becomes more prevalent, the need for reliable and accurate positioning has never been greater. Systems such as lane departure warning, adaptive cruise control, and automatic parking require precise data to function safely alongside sensors like cameras, radars, and lidars.
The new Teseo APP chip from STMicroelectronics tracks multiple GNSS systems across several frequency bands, including GPS, GLONASS, Galileo, Beidou, QZSS, and IRNSS. By receiving at least two frequencies from each system—unlike other products that only use one—it significantly improves accuracy and reduces signal interference. This allows for faster convergence times and more consistent performance, even in challenging environments.
In addition to its high precision, the Teseo APP includes integrity monitoring features that detect any drop in signal quality and alert the system immediately. This ensures compliance with the strict functional safety standards of the automotive industry, such as ISO 26262 and ASIL. The chip also integrates a secure microcontroller to protect against cyber threats, ensuring safe boot processes and verified data output.
For non-safety-critical applications, STMicroelectronics also offers the Teseo V chip, a simplified version that provides multi-frequency positioning without the need for integrity guarantees.
Antonio Radaelli, Director of Information and Entertainment at STMicroelectronics, emphasized the importance of high-precision satellite positioning in making autonomous driving safer and more reliable. "Our latest Teseo APP chip combines exceptional accuracy with unique integrity features, making it ideal for safety-critical applications," he said.
Currently, the Teseo APP is being sampled by major customers developing autonomous systems, with initial deployments expected in high-end models launched in 2020 and 2021. The chip was first showcased at the 2018 Mobile World Congress in Barcelona.
Traditionally, high-precision GNSS signals were limited to commercial and government use. Other methods to improve accuracy, such as differential GPS or real-time kinematic (RTK) systems, often require costly infrastructure like ground base stations. The Teseo APP eliminates this dependency by leveraging multi-frequency tracking, providing a cost-effective and reliable solution for autonomous vehicles.
With its ability to model ionospheric and multipath effects across multiple frequency bands, the Teseo chip delivers higher accuracy and faster response times—key advantages in time-sensitive driving scenarios. This innovation marks a significant step forward in the development of safer, smarter, and more connected vehicles.
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