srx-10i System Architecture
The srx-10i system includes two components:
- Network of Monitoring Nodes.
- Each Monitoring Node includes an RF Front-end and real-time processing software running in an embedded computer (see figure below)
- Central Node of Analyses.
- The Central Node collects the data sent and alarms raised by the Monitoring Nodes, and provides analysis capabilities to process the recorded signal samples and characterize the interference events.
The system can be easily integrated in already existing GNSS monitoring networks (e.g.; GPS or EGNOS monitoring systems).
Each local monitor processes the RF signal, potentially contaminated by interference, by digitally converting the I+Q samples obtained from the front-end to compute the Power Spectrum Density (PSD), which is used for identification and characterization of interferences present in the input signal.
When interferences are detected, an alarm is sent to the Central Node and a local file is created with the characterization of the alarm. These files can be locally re-analyzed or post-processed with the analysis tools.