Signal Quality Monitoring: Correlation mask based on Ratio Test metrics for multipath detection

In any measurement process, the observation is error affected: calibration and careful measuring procedures can reduce the error components but are unable to completely eliminate them. The capability to monitor and to detect any disturbances on the spreading sequences transmitted by the satellites is then of primary importance. Quality Control techniques based on a modified tracking architecture, which provides a certain number of correlator outputs, are analysed in this paper. Such outputs are used to build a metric used to monitor in real-time the reliability of the signal being tracked. In literature, several definitions of metrics can be found. The mainly used metrics are based on the f…