What is Hardware-in-the-Loop Testing?
Hardware-in-the-Loop (HITL) Testing is a critical validation method used to evaluate the performance of GNSS hardware, firmware, and integrated software in realistic scenarios. In HITL testing, actual GNSS receivers are connected to a test setup that provides live or recorded radio frequency (RF) signals that simulate real-world conditions. This enables controlled testing of positioning engines and correction services in environments like open skies, urban canyons, signal-blocked areas, or RF playback from drive tests – all without leaving the lab.
HITL setups can run hundreds of automated test cases around the clock, collecting performance metrics like accuracy, convergence time, integrity, and robustness across many devices. This approach enables rapid regression testing of new firmware releases and supports fault injection for safety validation. HITL is essential for ensuring that GNSS solutions meet stringent requirements before deployment in safety-critical or high-precision applications.
