Spirent, the world leader in GNSS and simulation systems, have developed a range of simulators and software for accurately testing In Vehicle Navigation Systems (IVNS) for the automotive industry. These provide a flexible solution for testing integrated navigation systems utilizing GPS and dead reckoning (DR) sensors.

Vehicle navigation presents one of the most challenging design environments for GPS-based systems. Systems are subject to a number of limitations and sources of error which can degrade their usefulness. Delays in availability or unflagged errors in position can severely limit the usefulness of the in vehicle system. Before a navigation system can be deployed to market there are a number of key assessments required to ensure that it will perform its task acceptably. Quantitative assessment of accuracy, time to first fix (TTFF) or integrity requires a systematic planned approach to testing.

One way of testing system performance is through live-sky testing or field trials. However there are a number of reasons why an alternative simulated laboratory approach using a GNSS RF Constellation Satellite simulator is fast becoming the testing approach of choice. In development phases, control and repeatability of tests are critical for determining performance and this level of accuracy and consistency are not possible when testing live with satellites in constant motion.

Spirent offers systems that can be controlled remotely, facilitating integration with other vehicle test rigs. Real-time hardware in the loop simulation is also possible, for example to allow synchronisation with driving simulators. Systems are also available that are optimised for vendor selection, integration and verification testing.

Spirent have proven expertise in providing optimal performance testing of your In Vehicle Navigation Systems.