INSIGHTS OF GNSS SIMULATOR
A GNSS simulator is used to test GNSS receivers and the systems which rely on them. It provides control over the signals generated from different GNSS constellations and global testing environments in a box. This enables testing of signals in controlled laboratory conditions. It is an alternative to live environment testing. Unlike live testing, GNSS simulation provides complete control of simulated satellite signals and environmental conditions. Testers can run and create different test scenarios with a GNSS simulator and have complete control over the date, time, and location; vehicle motion; environmental conditions; and signal errors and inaccuracies.
(1) Multi-mode and Multi-frequency
With the modernization and upgrading of the GNSS as beidou navigation system (BDS), Galileo navigation system (Galileo) and GPS system, multi-mode and multi-frequency is the inevitable direction of the future development of the receiver. Simulator that can realize multi-system and multi-frequency satellite signal combination simulation will become an inevitable trend. Through the plug-in bus structure, the combination of multi-mode and multi-frequency signals can be flexibly configured, so as to do the test and verification of the joint solution of multi-mode and multi-frequency GNSS receiver.
(2) High precision and High dynamic
With the improvement of the performance of electronic components, the development of software radio theory and the accumulation of simulator technology, the accuracy and dynamic of GNSS simulator will be improved to realize the algorithm and function verification of high-performance and high-dynamic GNSS receiver.
(3) Inertial Navigation Simulation and Differential Signal Generation
The simulator with inertial navigation simulation can verificate the INS/GNSS combined solution. Differential signal generation provide test conditions for the verification of precision differential receivers such as RTK GNSS receivers.
Over the last decade, GNSS simulators have proved themselves to be a catalyst in bringing location-based services to a wide range of smartphones and consumer devices and opened a number of new markets. The future requirements for obtaining cm level accuracy for applications such as Autonomous driving applications have made testing using simulators imperative. New developments in location technology such as multi-frequency GNSS and Real-time kinematic (RTK) are major features to drive simulator development