GNSS simulator generates highly realistic test scenarios

September 26, 2017 //By Jean-Pierre Joosting
Claiming to be the first and only high-end GNSS simulator on the market that has an internal noise generator and can generate complex interference scenarios with multiple interferers, the SMW200A from Rohde & Schwarz is user-friendly and future-proof.

Part of the Rohde & Schwarz portfolio of satellite navigation system simulators, the SMW200A GNSS simulator can be extended to up to four RF outputs and allows GNSS signals to be simulated simultaneously in multiple frequency bands for multiple antennas. It claims to be the only instrument on the market that can internally simulate a complex interference environment in parallel with GNSS signals.

Today, an increasing number of GNSS receivers are able to process signals from diverse navigation systems such as GPS, Glonass, Galileo or BeiDou in several frequency bands – and in some cases with several antennas in parallel – in order to improve positioning accuracy. Accuracy can be further improved with differential GNSS (DGNSS) techniques. These techniques are used in applications such as autonomous driving, and they are indispensable for precise and reliable positioning of aircraft during landing approaches. The GNSS receivers used in these applications must undergo extensive tests before deployment in vehicles or aircraft.

The SMW200A GNSS simulator offers an innovative test system for easy generation of complex and highly realistic test scenarios for a wide variety of GNSS applications. To test multifrequency and multi-antenna systems, users now have access to 72 GNSS channels that can be assigned to up to four RF outputs. The instrument can generate QZSS and SBAS signals as well as GPS, Glonass, Galileo and BeiDou signals. This test system enables users to quickly and easily verify the position accuracy of their receivers under realistic conditions.