GNSS Receiver Offers High-accuracy For Autonomous Driving


Supporting the development of safer autonomous driving cars, ST has claimed the world’s first multi-frequency satellite-navigation receiver chipset. The device is ideal for safety-critical automotive applications and high accuracy positioning at the decimeter and centimeter-level for PPP (Precise Point Positioning) and RTK (Real Time Kinematic) applications.

The new Teseo receiver combines multiple-frequency (L1, L2, and L5) and multi-constellation tracking to correct positioning error for high-precision navigation. It also features built-in integrity checking for use in safety-critical systems (ISO 26262 ASIL). The device enables autonomous-driving systems to combine precise positioning with sensor data for enhanced system performance, safety, and reliability, according to ST.

ST explains that conventional GNSS-based automotive positioning and navigation systems use only single-frequency GNSS receivers that operate in the L1 frequency bands available for consumer use, and are subject to environmentally-related errors that impair positional accuracy.


To eliminate these errors, Teseo APP tracks all available GNSS signals in multiple frequency bands, such as the GPS and GLONASS, Galielo, BeiDou, QZSS, and IRNSS L1, L2, and L5 frequency bands, and the Galileo E6 signal that contains Precise Point Positioning (PPP) correction data to allow worldwide decimeter-level accuracy.

The automotive-quality Teseo APP (Automotive Precise Positioning) receiver provides high-quality raw GNSS data for PPP (Precise Point Positioning) and RTK (Real Time Kinematic) algorithm, which allows accurate positioning and rapid convergence time worldwide.

The receiver also monitors the integrity of the satellite data to alert the system if accuracy is degraded for any reason. This permits Tier-1 manufacturers to certify safety-critical systems in accordance with the automotive industry functional-safety standard, ISO 26262, up to the highest Automotive Safety Integrity Level (ASIL).

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Teseo APP also integrates a secure microcontroller for secure system boot and data-output authentication to keep sensitive data safe from attack.

The Teseo V chip from ST, announced along with the Teseo APP, provides equivalent, accurate multi-frequency positioning in a simplified device addressing non-safety-critical applications that do not require integrity assurance.

“High-accuracy satellite positioning makes autonomous driving safer, smoother, and more reliable,” said Antonio Radaelli, Director, Infotainment Business Unit, STMicroelectronics. “Our newest Teseo APP GNSS chip combines extreme accuracy and precision with industry-unique integrity assurance for use in safety-critical applications.”

ST is now supplying product samples to lead customers who are developing autonomous-driving systems expected to appear first in high-end vehicles launched in 2020/2021.

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