High precision positioning

High precision positioning

Courtesy of u-blox : High precision positioning

Achieving centimeter-level accuracy by combining RTK technology and u-blox GNSS expertise.

High precision positioning can be achieved by combining Global Navigation Satellite Systems (GNSS), such as GPS, GLONASS, Galileo and BeiDou, with Real Time Kinematics (RTK) technology. RTK is a technique that uses the receiver’s measurements of the phase of the satellite signal’s carrier wave. These measurements combined with corrections from a local or virtual base station allow the receiver to solve carrier ambiguities and provide centimeter level accurate position information to the end user, typically a moving device referred to as the rover.

The demand for scalable high precision technology is growing rapidly, as evident in the automotive world with next generation HUD and V2X applications, and in robotics with applications such as UAVs and robotic lawnmowers.

However, due to the complexity, size, power, and cost restrictions, existing high precision solutions have been unable to meet the demands of these markets.

Building on the success of our NEO M8P high precision GNSS module series and drawing on our extensive experience in GNSS positioning technologies, including dead reckoning, multi‑band, Real Time Kinematics, and GNSS correction services, we’ve created the u‑blox F9 platform. The platform delivers the next level of scalable GNSS high precision technology, which will pave the path for new navigation applications such as augmented reality and unmanned vehicle navigation.

To learn more, see:


ZED-F9K module

High precision dead reckoning with integrated IMU sensors

Continuous lane accurate positioning under the most challenging conditions

  • Decimeter level accuracy for automotive mass markets
  • Ideal for ADAS, V2X and head‑up displays
  • Turnkey multi‑band RTK solution with built‑in inertial sensors
  • Low latency position update rate of up to 30 Hz

The ZED-F9K module with the u-blox F9 multi-band GNSS receiver features rapid convergence time within seconds. This mass-market component provides decimeter-level positioning with high availability, while making use of all four GNSS constellations simultaneously. It is the first dead reckoning module with an integrated Inertial Measurement Unit (IMU) capable of high precision positioning. The sophisticated built-in algorithms fuse the IMU data, GNSS measurements, wheel ticks, and vehicle dynamics model to provide lane accurate positioning where GNSS alone would fail. The module operates under open-sky motorways, in the wooded countryside, in difficult urban environments, and even in tunnels and underground parking. In modern automotive applications, such as Advanced Driver Assistance System (ADAS) where availability can improve the safety of our roads, ZED-F9K is the ultimate solution. The device is a turnkey solution eliminating the technical risk of integrating third party libraries, precise positioning engines, and the multi-faceted hardware engineering aspects of radio frequency design and digital design. The u-blox approach provides a transparent evaluation of the positioning solution and provides clear lines of responsibility for design support, while reducing supply chain complexity during production. ZED-F9K is ideal for innovative automotive architecture designs with limited space and power. The module provides accurate location services to the increasing number of intelligent Electronic Control Units (ECU), such as telematics control units, navigation systems, infotainment, and V2x safety systems. The module reaches a high navigation output rate of up to 30 Hz. The on-board processor augments fused GNSS position with additional IMU-based position estimates. Drivers experience responsive, lag-free user interfaces. ZED-F9K can output raw IMU and raw GNSS data for advanced applications. ZED-F9K modules are manufactured in ISO/TS 16949 certified sites and are fully tested on a system level. Qualification tests are performed as stipulated in the ISO 16750 standard: “Road vehicles – Environmental conditions and testing for electrical and electronic equipment”.