System Model-to-Lab Methodology for GNSS Desensitization Testing

A GNSS receiver desensitization test and verification methodology linking the simulation domain to lab instrumentation is demonstrated. This approach can help shorten GNSS receiver development and integration in wireless mobile devices by eliminating the need for actual RF hardware while enabling detailed GNSS receiver desensitization testing. The modeling aspect focuses on computationally efficient interferer signal generation using baseband-equivalent signal models based on typical wireless transmitter waveforms present on a smartphone platform. The interfering waveforms are then reproduced within the GNSS band by a vector signal generator enabling automated desensitization tests. The methodology is validated through both system simulation and lab measurements to within 1 dB.