HIL Setup for GNSS-Based Driving Functions

• HIL system with Automotive Simulation Models (ASM) for simulating the vehicle and traffic
• Dedicated GNSS Simulator Interface for controlling a Global Navigation Satellite System (GNSS) signal generator
• Selecting specific GNSS scenarios with desired signal conditions according to the current satellite constellation, geographic location, etc.
• Providing vehicle position data as radio frequency signals

Many applications, such as the electronic horizon (eHorizon), but also V2X communication and autonomous driving functions require satellite-supported detection of the vehicle position. Since the availability of satellite systems varies worldwide and the quality of the Global Navigation Satellite System (GNSS) signals depends on many factors such as deep street canyons, flyovers etc., the robustness and suitability for the everyday use of the applications in various test scenarios must be ensured. With the GNSS Simulator Interface this can be done virtually. For this purpose, a GNSS signal generator is connected to the hardware-in-the-loop (HIL) simulator. This allows you to select predefined GNSS scenarios and control the signal generator. In a typical test, the start position, date, route, and driving maneuver of the vehicle are first parameterized in the ASM model. Then the desired GNSS scenario, for example, a specific satellite constellation (GPS, Galileo, Glonass, BeiDou, etc.) and signal attenuation are selected. When executing the test, the HIL simulator continuously sends the vehicle’s position data to the signal generator, which then prepares it according to the GNSS scenario and provides it to the device under test as a real radio frequency signal.